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d03cabfe SK |
1 | #include <assert.h> |
2 | #include <ctype.h> | |
3 | #include <errno.h> | |
4 | #include <fcntl.h> | |
5 | #include <limits.h> | |
6 | #include <stdio.h> | |
7 | #include <stdlib.h> | |
8 | #include <string.h> | |
9 | #include <time.h> | |
10 | #include <unistd.h> | |
11 | ||
12 | #include "khatus_lib_log.h" | |
55883d9a | 13 | #include "khatus_lib_sensor.h" |
d03cabfe SK |
14 | #include "khatus_lib_time.h" |
15 | ||
16 | #define usage(...) {print_usage(); fprintf(stderr, "Error:\n " __VA_ARGS__); exit(EXIT_FAILURE);} | |
17 | ||
18 | #define MAX_LEN 20 | |
d03cabfe SK |
19 | |
20 | char *argv0; | |
21 | ||
d03cabfe SK |
22 | double opt_interval = 1.0; |
23 | char *opt_battery = "BAT0"; | |
24 | char *opt_fifo = NULL; | |
25 | ||
26 | void | |
27 | print_usage() | |
28 | { | |
29 | printf( | |
30 | "%s: [OPT ...] FIFO\n" | |
31 | "\n" | |
32 | "FIFO = string # path to fifo file\n" | |
33 | "OPT = -i int # interval\n" | |
34 | " | -b string # battery file name from /sys/class/power_supply/\n" | |
35 | " | -h # help message (i.e. what you're reading now :) )\n", | |
36 | argv0); | |
37 | } | |
38 | ||
39 | void | |
40 | opt_parse(int argc, char **argv) | |
41 | { | |
42 | char c; | |
43 | ||
44 | while ((c = getopt(argc, argv, "f:i:h")) != -1) | |
45 | switch (c) { | |
46 | case 'f': | |
47 | opt_battery = calloc(strlen(optarg), sizeof(char)); | |
48 | strcpy(opt_battery, optarg); | |
49 | break; | |
50 | case 'i': | |
51 | opt_interval = atof(optarg); | |
52 | break; | |
53 | case 'h': | |
54 | print_usage(); | |
55 | exit(EXIT_SUCCESS); | |
56 | case '?': | |
57 | if (optopt == 'f' || optopt == 'i') | |
58 | fprintf(stderr, | |
59 | "Option -%c requires an argument.\n", | |
60 | optopt); | |
61 | else if (isprint(optopt)) | |
62 | fprintf (stderr, | |
63 | "Unknown option `-%c'.\n", | |
64 | optopt); | |
65 | else | |
66 | fprintf(stderr, | |
67 | "Unknown option character `\\x%x'.\n", | |
68 | optopt); | |
69 | exit(EXIT_FAILURE); | |
70 | default: | |
71 | assert(0); | |
72 | } | |
73 | opt_fifo = argv[optind]; | |
74 | debug("opt_fifo: %s\n", opt_fifo); | |
75 | if (!opt_fifo) | |
76 | usage("No filename was provided\n"); | |
77 | } | |
78 | ||
d03cabfe | 79 | int |
fa2a9b44 | 80 | get_capacity(char *buf, char *path) |
d03cabfe SK |
81 | { |
82 | FILE *fp; | |
83 | int cap; | |
84 | ||
85 | if (!(fp = fopen(path, "r"))) | |
86 | fatal("Failed to open %s. errno: %d, msg: %s\n", | |
87 | path, errno, strerror(errno)); | |
88 | ||
89 | switch (fscanf(fp, "%d", &cap)) { | |
90 | case -1: fatal("EOF\n"); | |
91 | case 0: fatal("Read 0\n"); | |
92 | case 1: break; | |
93 | default: assert(0); | |
94 | } | |
95 | fclose(fp); | |
96 | return snprintf(buf, 6, "%3d%%\n", cap); | |
97 | } | |
98 | ||
99 | int | |
100 | main(int argc, char **argv) | |
101 | { | |
102 | argv0 = argv[0]; | |
103 | ||
104 | char buf[10]; | |
fa2a9b44 | 105 | char path[PATH_MAX]; |
d03cabfe SK |
106 | char *path_fmt = "/sys/class/power_supply/%s/capacity"; |
107 | struct timespec ti = timespec_of_float(opt_interval); | |
108 | ||
109 | opt_parse(argc, argv); | |
110 | ||
111 | memset(path, '\0', PATH_MAX); | |
112 | snprintf(path, PATH_MAX, path_fmt, opt_battery); | |
fa2a9b44 SK |
113 | loop( |
114 | &ti, | |
115 | opt_fifo, | |
116 | buf, | |
117 | (SENSOR_FUN_T) get_capacity, | |
118 | (SENSOR_PARAMS_T) path | |
119 | ); | |
d03cabfe | 120 | } |