^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /* IIO - useful set of util functionality
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (c) 2008 Jonathan Cameron
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <stdlib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <stdio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <stdint.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <dirent.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <ctype.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include "iio_utils.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) const char *iio_dir = "/sys/bus/iio/devices/";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) static char * const iio_direction[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) "in",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) "out",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * iioutils_break_up_name() - extract generic name from full channel name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * @full_name: the full channel name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * @generic_name: the output generic channel name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * Returns 0 on success, or a negative error code if string extraction failed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) **/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) int iioutils_break_up_name(const char *full_name, char **generic_name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) char *current;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) char *w, *r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) char *working, *prefix = "";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) int i, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) for (i = 0; i < ARRAY_SIZE(iio_direction); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) if (!strncmp(full_name, iio_direction[i],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) strlen(iio_direction[i]))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) prefix = iio_direction[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) current = strdup(full_name + strlen(prefix) + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) if (!current)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) working = strtok(current, "_\0");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) if (!working) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) free(current);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) w = working;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) r = working;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) while (*r != '\0') {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) if (!isdigit(*r)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) *w = *r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) w++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) r++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) *w = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) ret = asprintf(generic_name, "%s_%s", prefix, working);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) free(current);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) return (ret == -1) ? -ENOMEM : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) * iioutils_get_type() - find and process _type attribute data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) * @is_signed: output whether channel is signed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) * @bytes: output how many bytes the channel storage occupies
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) * @bits_used: output number of valid bits of data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) * @shift: output amount of bits to shift right data before applying bit mask
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) * @mask: output a bit mask for the raw data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) * @be: output if data in big endian
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) * @device_dir: the IIO device directory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) * @name: the channel name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) * @generic_name: the channel type name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) * Returns a value >= 0 on success, otherwise a negative error code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) **/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) int iioutils_get_type(unsigned *is_signed, unsigned *bytes, unsigned *bits_used,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) unsigned *shift, uint64_t *mask, unsigned *be,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) const char *device_dir, const char *name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) const char *generic_name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) FILE *sysfsfp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) DIR *dp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) char *scan_el_dir, *builtname, *builtname_generic, *filename = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) char signchar, endianchar;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) unsigned padint;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) const struct dirent *ent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) ret = asprintf(&scan_el_dir, FORMAT_SCAN_ELEMENTS_DIR, device_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) ret = asprintf(&builtname, FORMAT_TYPE_FILE, name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) goto error_free_scan_el_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) ret = asprintf(&builtname_generic, FORMAT_TYPE_FILE, generic_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) goto error_free_builtname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) dp = opendir(scan_el_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) if (!dp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) ret = -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) goto error_free_builtname_generic;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) ret = -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) while (ent = readdir(dp), ent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) if ((strcmp(builtname, ent->d_name) == 0) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) (strcmp(builtname_generic, ent->d_name) == 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) ret = asprintf(&filename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) "%s/%s", scan_el_dir, ent->d_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) goto error_closedir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) sysfsfp = fopen(filename, "r");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) if (!sysfsfp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) ret = -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) fprintf(stderr, "failed to open %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) goto error_free_filename;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) ret = fscanf(sysfsfp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) "%ce:%c%u/%u>>%u",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) &endianchar,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) &signchar,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) bits_used,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) &padint, shift);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) ret = -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) fprintf(stderr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) "failed to pass scan type description\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) goto error_close_sysfsfp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) } else if (ret != 5) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) ret = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) fprintf(stderr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) "scan type description didn't match\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) goto error_close_sysfsfp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) *be = (endianchar == 'b');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) *bytes = padint / 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) if (*bits_used == 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) *mask = ~(0ULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) *mask = (1ULL << *bits_used) - 1ULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) *is_signed = (signchar == 's');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) if (fclose(sysfsfp)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) ret = -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) fprintf(stderr, "Failed to close %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) goto error_free_filename;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) sysfsfp = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) free(filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) filename = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) * Avoid having a more generic entry overwriting
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) * the settings.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) if (strcmp(builtname, ent->d_name) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) error_close_sysfsfp:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) if (sysfsfp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) if (fclose(sysfsfp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) perror("iioutils_get_type(): Failed to close file");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) error_free_filename:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) if (filename)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) free(filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) error_closedir:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) if (closedir(dp) == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) perror("iioutils_get_type(): Failed to close directory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) error_free_builtname_generic:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) free(builtname_generic);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) error_free_builtname:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) free(builtname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) error_free_scan_el_dir:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) free(scan_el_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) * iioutils_get_param_float() - read a float value from a channel parameter
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) * @output: output the float value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) * @param_name: the parameter name to read
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) * @device_dir: the IIO device directory in sysfs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) * @name: the channel name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) * @generic_name: the channel type name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) * Returns a value >= 0 on success, otherwise a negative error code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) **/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) int iioutils_get_param_float(float *output, const char *param_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) const char *device_dir, const char *name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) const char *generic_name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) FILE *sysfsfp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) DIR *dp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) char *builtname, *builtname_generic;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) char *filename = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) const struct dirent *ent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) ret = asprintf(&builtname, "%s_%s", name, param_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) ret = asprintf(&builtname_generic,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) "%s_%s", generic_name, param_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) goto error_free_builtname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) dp = opendir(device_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) if (!dp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) ret = -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) goto error_free_builtname_generic;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) ret = -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) while (ent = readdir(dp), ent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) if ((strcmp(builtname, ent->d_name) == 0) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) (strcmp(builtname_generic, ent->d_name) == 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) ret = asprintf(&filename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) "%s/%s", device_dir, ent->d_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) goto error_closedir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) sysfsfp = fopen(filename, "r");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) if (!sysfsfp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) ret = -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) goto error_free_filename;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) errno = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) if (fscanf(sysfsfp, "%f", output) != 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) ret = errno ? -errno : -ENODATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) error_free_filename:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) if (filename)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) free(filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) error_closedir:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) if (closedir(dp) == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) perror("iioutils_get_param_float(): Failed to close directory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) error_free_builtname_generic:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) free(builtname_generic);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) error_free_builtname:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) free(builtname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) * bsort_channel_array_by_index() - sort the array in index order
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) * @ci_array: the iio_channel_info array to be sorted
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) * @cnt: the amount of array elements
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) **/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) void bsort_channel_array_by_index(struct iio_channel_info *ci_array, int cnt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) struct iio_channel_info temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) int x, y;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) for (x = 0; x < cnt; x++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) for (y = 0; y < (cnt - 1); y++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) if (ci_array[y].index > ci_array[y + 1].index) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) temp = ci_array[y + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) ci_array[y + 1] = ci_array[y];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) ci_array[y] = temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) * build_channel_array() - function to figure out what channels are present
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) * @device_dir: the IIO device directory in sysfs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) * @ci_array: output the resulting array of iio_channel_info
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) * @counter: output the amount of array elements
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) * Returns 0 on success, otherwise a negative error code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) **/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) int build_channel_array(const char *device_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) struct iio_channel_info **ci_array, int *counter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) DIR *dp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) FILE *sysfsfp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) int count = 0, i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) struct iio_channel_info *current;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) const struct dirent *ent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) char *scan_el_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) char *filename;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) *counter = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) ret = asprintf(&scan_el_dir, FORMAT_SCAN_ELEMENTS_DIR, device_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) dp = opendir(scan_el_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) if (!dp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) ret = -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) goto error_free_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) while (ent = readdir(dp), ent)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) if (strcmp(ent->d_name + strlen(ent->d_name) - strlen("_en"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) "_en") == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) ret = asprintf(&filename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) "%s/%s", scan_el_dir, ent->d_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) goto error_close_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) sysfsfp = fopen(filename, "r");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) if (!sysfsfp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) ret = -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) free(filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) goto error_close_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) errno = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) if (fscanf(sysfsfp, "%i", &ret) != 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) ret = errno ? -errno : -ENODATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) if (fclose(sysfsfp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) perror("build_channel_array(): Failed to close file");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) free(filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) goto error_close_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) if (ret == 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) (*counter)++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) if (fclose(sysfsfp)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) ret = -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) free(filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) goto error_close_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) free(filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) *ci_array = malloc(sizeof(**ci_array) * (*counter));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) if (!*ci_array) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) goto error_close_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) seekdir(dp, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) while (ent = readdir(dp), ent) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) if (strcmp(ent->d_name + strlen(ent->d_name) - strlen("_en"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) "_en") == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) int current_enabled = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) current = &(*ci_array)[count++];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) ret = asprintf(&filename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) "%s/%s", scan_el_dir, ent->d_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) /* decrement count to avoid freeing name */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) count--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) goto error_cleanup_array;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) sysfsfp = fopen(filename, "r");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) if (!sysfsfp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) ret = -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) free(filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) count--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) goto error_cleanup_array;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) errno = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) if (fscanf(sysfsfp, "%i", ¤t_enabled) != 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) ret = errno ? -errno : -ENODATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) free(filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) count--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) goto error_cleanup_array;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) if (fclose(sysfsfp)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) ret = -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) free(filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) count--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) goto error_cleanup_array;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) if (!current_enabled) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) free(filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) count--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) current->scale = 1.0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) current->offset = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) current->name = strndup(ent->d_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) strlen(ent->d_name) -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) strlen("_en"));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) if (!current->name) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) free(filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) count--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) goto error_cleanup_array;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) /* Get the generic and specific name elements */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) ret = iioutils_break_up_name(current->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) ¤t->generic_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) free(filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) free(current->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) count--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) goto error_cleanup_array;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) ret = asprintf(&filename,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) "%s/%s_index",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) scan_el_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) current->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) free(filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) goto error_cleanup_array;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) sysfsfp = fopen(filename, "r");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) if (!sysfsfp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) ret = -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) fprintf(stderr, "failed to open %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) free(filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) goto error_cleanup_array;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) errno = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) if (fscanf(sysfsfp, "%u", ¤t->index) != 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) ret = errno ? -errno : -ENODATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) if (fclose(sysfsfp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) perror("build_channel_array(): Failed to close file");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) free(filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) goto error_cleanup_array;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) if (fclose(sysfsfp)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) ret = -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) free(filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) goto error_cleanup_array;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) free(filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) /* Find the scale */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) ret = iioutils_get_param_float(¤t->scale,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) "scale",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) device_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) current->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) current->generic_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) if ((ret < 0) && (ret != -ENOENT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) goto error_cleanup_array;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) ret = iioutils_get_param_float(¤t->offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) "offset",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) device_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) current->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) current->generic_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) if ((ret < 0) && (ret != -ENOENT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) goto error_cleanup_array;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) ret = iioutils_get_type(¤t->is_signed,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) ¤t->bytes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) ¤t->bits_used,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) ¤t->shift,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) ¤t->mask,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) ¤t->be,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) device_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) current->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) current->generic_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) goto error_cleanup_array;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) if (closedir(dp) == -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) ret = -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) goto error_cleanup_array;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) free(scan_el_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) /* reorder so that the array is in index order */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) bsort_channel_array_by_index(*ci_array, *counter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) error_cleanup_array:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) for (i = count - 1; i >= 0; i--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) free((*ci_array)[i].name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) free((*ci_array)[i].generic_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) free(*ci_array);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) *ci_array = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) *counter = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) error_close_dir:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) if (dp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) if (closedir(dp) == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) perror("build_channel_array(): Failed to close dir");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) error_free_name:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) free(scan_el_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) static int calc_digits(int num)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) int count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) while (num != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) num /= 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) count++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) * find_type_by_name() - function to match top level types by name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) * @name: top level type instance name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) * @type: the type of top level instance being searched
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) * Returns the device number of a matched IIO device on success, otherwise a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) * negative error code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) * Typical types this is used for are device and trigger.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) **/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) int find_type_by_name(const char *name, const char *type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) const struct dirent *ent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) int number, numstrlen, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) FILE *namefp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) DIR *dp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) char thisname[IIO_MAX_NAME_LENGTH];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) char *filename;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) dp = opendir(iio_dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) if (!dp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) fprintf(stderr, "No industrialio devices available\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) while (ent = readdir(dp), ent) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) if (strcmp(ent->d_name, ".") != 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) strcmp(ent->d_name, "..") != 0 &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) strlen(ent->d_name) > strlen(type) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) strncmp(ent->d_name, type, strlen(type)) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) errno = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) ret = sscanf(ent->d_name + strlen(type), "%d", &number);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) ret = -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) fprintf(stderr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) "failed to read element number\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) goto error_close_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) } else if (ret != 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) ret = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) fprintf(stderr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) "failed to match element number\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) goto error_close_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) numstrlen = calc_digits(number);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) /* verify the next character is not a colon */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) if (strncmp(ent->d_name + strlen(type) + numstrlen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) ":", 1) != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) filename = malloc(strlen(iio_dir) + strlen(type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) + numstrlen + 6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) if (!filename) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) goto error_close_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) ret = sprintf(filename, "%s%s%d/name", iio_dir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) type, number);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) free(filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) goto error_close_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) namefp = fopen(filename, "r");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) if (!namefp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) free(filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) free(filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) errno = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) if (fscanf(namefp, "%s", thisname) != 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) ret = errno ? -errno : -ENODATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) goto error_close_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) if (fclose(namefp)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) ret = -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) goto error_close_dir;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) if (strcmp(name, thisname) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) if (closedir(dp) == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) return -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) return number;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) if (closedir(dp) == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) return -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) error_close_dir:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) if (closedir(dp) == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) perror("find_type_by_name(): Failed to close directory");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) static int _write_sysfs_int(const char *filename, const char *basedir, int val,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) int verify)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) FILE *sysfsfp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) int test;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) char *temp = malloc(strlen(basedir) + strlen(filename) + 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) if (!temp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) ret = sprintf(temp, "%s/%s", basedir, filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) goto error_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) sysfsfp = fopen(temp, "w");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) if (!sysfsfp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) ret = -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) fprintf(stderr, "failed to open %s\n", temp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) goto error_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) ret = fprintf(sysfsfp, "%d", val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) if (fclose(sysfsfp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) perror("_write_sysfs_int(): Failed to close dir");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) goto error_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) if (fclose(sysfsfp)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) ret = -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) goto error_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) if (verify) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) sysfsfp = fopen(temp, "r");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) if (!sysfsfp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) ret = -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) fprintf(stderr, "failed to open %s\n", temp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) goto error_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) if (fscanf(sysfsfp, "%d", &test) != 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) ret = errno ? -errno : -ENODATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) if (fclose(sysfsfp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) perror("_write_sysfs_int(): Failed to close dir");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) goto error_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) if (fclose(sysfsfp)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) ret = -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) goto error_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) if (test != val) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) fprintf(stderr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) "Possible failure in int write %d to %s/%s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) val, basedir, filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) ret = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) error_free:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) free(temp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) * write_sysfs_int() - write an integer value to a sysfs file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) * @filename: name of the file to write to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) * @basedir: the sysfs directory in which the file is to be found
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) * @val: integer value to write to file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) * Returns a value >= 0 on success, otherwise a negative error code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) **/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) int write_sysfs_int(const char *filename, const char *basedir, int val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) return _write_sysfs_int(filename, basedir, val, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) * write_sysfs_int_and_verify() - write an integer value to a sysfs file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) * and verify
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) * @filename: name of the file to write to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) * @basedir: the sysfs directory in which the file is to be found
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) * @val: integer value to write to file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) * Returns a value >= 0 on success, otherwise a negative error code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) **/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) int write_sysfs_int_and_verify(const char *filename, const char *basedir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) int val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) return _write_sysfs_int(filename, basedir, val, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) static int _write_sysfs_string(const char *filename, const char *basedir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) const char *val, int verify)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) FILE *sysfsfp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) char *temp = malloc(strlen(basedir) + strlen(filename) + 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) if (!temp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) fprintf(stderr, "Memory allocation failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) ret = sprintf(temp, "%s/%s", basedir, filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) goto error_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) sysfsfp = fopen(temp, "w");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) if (!sysfsfp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770) ret = -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) fprintf(stderr, "Could not open %s\n", temp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) goto error_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) ret = fprintf(sysfsfp, "%s", val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) if (fclose(sysfsfp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) perror("_write_sysfs_string(): Failed to close dir");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) goto error_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) if (fclose(sysfsfp)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) ret = -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785) goto error_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) if (verify) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) sysfsfp = fopen(temp, "r");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) if (!sysfsfp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) ret = -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) fprintf(stderr, "Could not open file to verify\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) goto error_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) if (fscanf(sysfsfp, "%s", temp) != 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) ret = errno ? -errno : -ENODATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) if (fclose(sysfsfp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) perror("_write_sysfs_string(): Failed to close dir");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) goto error_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) if (fclose(sysfsfp)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) ret = -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) goto error_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) if (strcmp(temp, val) != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) fprintf(stderr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) "Possible failure in string write of %s "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) "Should be %s written to %s/%s\n", temp, val,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) basedir, filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) ret = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) error_free:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) free(temp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) * write_sysfs_string_and_verify() - string write, readback and verify
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) * @filename: name of file to write to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) * @basedir: the sysfs directory in which the file is to be found
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) * @val: the string to write
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) * Returns a value >= 0 on success, otherwise a negative error code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) **/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) int write_sysfs_string_and_verify(const char *filename, const char *basedir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) const char *val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) return _write_sysfs_string(filename, basedir, val, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) * write_sysfs_string() - write string to a sysfs file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) * @filename: name of file to write to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) * @basedir: the sysfs directory in which the file is to be found
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) * @val: the string to write
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) * Returns a value >= 0 on success, otherwise a negative error code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) **/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846) int write_sysfs_string(const char *filename, const char *basedir,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) const char *val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) return _write_sysfs_string(filename, basedir, val, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) * read_sysfs_posint() - read an integer value from file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) * @filename: name of file to read from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) * @basedir: the sysfs directory in which the file is to be found
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) * Returns the read integer value >= 0 on success, otherwise a negative error
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) * code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) **/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) int read_sysfs_posint(const char *filename, const char *basedir)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) FILE *sysfsfp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) char *temp = malloc(strlen(basedir) + strlen(filename) + 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) if (!temp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) fprintf(stderr, "Memory allocation failed");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871) ret = sprintf(temp, "%s/%s", basedir, filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) goto error_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) sysfsfp = fopen(temp, "r");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) if (!sysfsfp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) ret = -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) goto error_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) errno = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) if (fscanf(sysfsfp, "%d\n", &ret) != 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) ret = errno ? -errno : -ENODATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) if (fclose(sysfsfp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) perror("read_sysfs_posint(): Failed to close dir");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) goto error_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) if (fclose(sysfsfp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) ret = -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) error_free:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) free(temp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) * read_sysfs_float() - read a float value from file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) * @filename: name of file to read from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) * @basedir: the sysfs directory in which the file is to be found
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) * @val: output the read float value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) * Returns a value >= 0 on success, otherwise a negative error code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) **/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) int read_sysfs_float(const char *filename, const char *basedir, float *val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) FILE *sysfsfp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) char *temp = malloc(strlen(basedir) + strlen(filename) + 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) if (!temp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) fprintf(stderr, "Memory allocation failed");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) ret = sprintf(temp, "%s/%s", basedir, filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) goto error_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) sysfsfp = fopen(temp, "r");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) if (!sysfsfp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) ret = -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) goto error_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) errno = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) if (fscanf(sysfsfp, "%f\n", val) != 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) ret = errno ? -errno : -ENODATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) if (fclose(sysfsfp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) perror("read_sysfs_float(): Failed to close dir");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) goto error_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) if (fclose(sysfsfp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) ret = -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) error_free:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) free(temp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) * read_sysfs_string() - read a string from file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) * @filename: name of file to read from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) * @basedir: the sysfs directory in which the file is to be found
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) * @str: output the read string
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) * Returns a value >= 0 on success, otherwise a negative error code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) **/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) int read_sysfs_string(const char *filename, const char *basedir, char *str)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) FILE *sysfsfp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958) char *temp = malloc(strlen(basedir) + strlen(filename) + 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) if (!temp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) fprintf(stderr, "Memory allocation failed");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965) ret = sprintf(temp, "%s/%s", basedir, filename);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) goto error_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) sysfsfp = fopen(temp, "r");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) if (!sysfsfp) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) ret = -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) goto error_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) errno = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) if (fscanf(sysfsfp, "%s\n", str) != 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) ret = errno ? -errno : -ENODATA;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) if (fclose(sysfsfp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) perror("read_sysfs_string(): Failed to close dir");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) goto error_free;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) if (fclose(sysfsfp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) ret = -errno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987) error_free:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) free(temp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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