tools/iio/lsiio.c

   1 /*
   2  * Industrial I/O utilities - lsiio.c
   3  *
   4  * Copyright (c) 2010 Manuel Stahl <manuel.stahl@iis.fraunhofer.de>
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License version 2 as published by
   8  * the Free Software Foundation.
   9  */
  10
  11 #include <string.h>
  12 #include <dirent.h>
  13 #include <stdio.h>
  14 #include <errno.h>
  15 #include <stdint.h>
  16 #include <stdlib.h>
  17 #include <unistd.h>
  18 #include <sys/types.h>
  19 #include <sys/stat.h>
  20 #include <sys/dir.h>
  21 #include "iio_utils.h"
  22
  23
  24 static enum verbosity {
  25         VERBLEVEL_DEFAULT,      /* 0 gives lspci behaviour */
  26         VERBLEVEL_SENSORS,      /* 1 lists sensors */
  27 } verblevel = VERBLEVEL_DEFAULT;
  28
  29 const char *type_device = "iio:device";
  30 const char *type_trigger = "trigger";
  31
  32
  33 static inline int check_prefix(const char *str, const char *prefix)
  34 {
  35         return strlen(str) > strlen(prefix) &&
  36                 strncmp(str, prefix, strlen(prefix)) == 0;
  37 }
  38
  39 static inline int check_postfix(const char *str, const char *postfix)
  40 {
  41         return strlen(str) > strlen(postfix) &&
  42                 strcmp(str + strlen(str) - strlen(postfix), postfix) == 0;
  43 }
  44
  45 static int dump_channels(const char *dev_dir_name)
  46 {
  47         DIR *dp;
  48         const struct dirent *ent;
  49
  50         dp = opendir(dev_dir_name);
  51         if (dp == NULL)
  52                 return -errno;
  53         while (ent = readdir(dp), ent != NULL)
  54                 if (check_prefix(ent->d_name, "in_") &&
  55                     check_postfix(ent->d_name, "_raw")) {
  56                         printf("   %-10s\n", ent->d_name);
  57                 }
  58
  59         return 0;
  60 }
  61
  62 static int dump_one_device(const char *dev_dir_name)
  63 {
  64         char name[IIO_MAX_NAME_LENGTH];
  65         int dev_idx;
  66         int retval;
  67
  68         retval = sscanf(dev_dir_name + strlen(iio_dir) + strlen(type_device),
  69                         "%i", &dev_idx);
  70         if (retval != 1)
  71                 return -EINVAL;
  72         read_sysfs_string("name", dev_dir_name, name);
  73         printf("Device %03d: %s\n", dev_idx, name);
  74
  75         if (verblevel >= VERBLEVEL_SENSORS)
  76                 return dump_channels(dev_dir_name);
  77         return 0;
  78 }
  79
  80 static int dump_one_trigger(const char *dev_dir_name)
  81 {
  82         char name[IIO_MAX_NAME_LENGTH];
  83         int dev_idx;
  84         int retval;
  85
  86         retval = sscanf(dev_dir_name + strlen(iio_dir) + strlen(type_trigger),
  87                         "%i", &dev_idx);
  88         if (retval != 1)
  89                 return -EINVAL;
  90         read_sysfs_string("name", dev_dir_name, name);
  91         printf("Trigger %03d: %s\n", dev_idx, name);
  92         return 0;
  93 }
  94
  95 static void dump_devices(void)
  96 {
  97         const struct dirent *ent;
  98         DIR *dp;
  99
 100         dp = opendir(iio_dir);
 101         if (dp == NULL) {
 102                 printf("No industrial I/O devices available\n");
 103                 return;
 104         }
 105
 106         while (ent = readdir(dp), ent != NULL) {
 107                 if (check_prefix(ent->d_name, type_device)) {
 108                         char *dev_dir_name;
 109
 110                         asprintf(&dev_dir_name, "%s%s", iio_dir, ent->d_name);
 111                         dump_one_device(dev_dir_name);
 112                         free(dev_dir_name);
 113                         if (verblevel >= VERBLEVEL_SENSORS)
 114                                 printf("\n");
 115                 }
 116         }
 117         rewinddir(dp);
 118         while (ent = readdir(dp), ent != NULL) {
 119                 if (check_prefix(ent->d_name, type_trigger)) {
 120                         char *dev_dir_name;
 121
 122                         asprintf(&dev_dir_name, "%s%s", iio_dir, ent->d_name);
 123                         dump_one_trigger(dev_dir_name);
 124                         free(dev_dir_name);
 125                 }
 126         }
 127         closedir(dp);
 128 }
 129
 130 int main(int argc, char **argv)
 131 {
 132         int c, err = 0;
 133
 134         while ((c = getopt(argc, argv, "d:D:v")) != EOF) {
 135                 switch (c) {
 136                 case 'v':
 137                         verblevel++;
 138                         break;
 139
 140                 case '?':
 141                 default:
 142                         err++;
 143                         break;
 144                 }
 145         }
 146         if (err || argc > optind) {
 147                 fprintf(stderr, "Usage: lsiio [options]...\n"
 148                         "List industrial I/O devices\n"
 149                         "  -v, --verbose\n"
 150                         "      Increase verbosity (may be given multiple times)\n"
 151                         );
 152                 exit(1);
 153         }
 154
 155         dump_devices();
 156
 157         return 0;
 158 }