| 1 | #include <assert.h> |
| 2 | #include <ctype.h> |
| 3 | #include <errno.h> |
| 4 | #include <fcntl.h> |
| 5 | #include <signal.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" |
| 13 | #include "khatus_lib_sensor.h" |
| 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 |
| 19 | #define END_OF_MESSAGE '\n' |
| 20 | |
| 21 | char *argv0 = NULL; |
| 22 | |
| 23 | double opt_interval = 1.0; |
| 24 | char *opt_fmt = "%a %b %d %H:%M:%S"; |
| 25 | char *fifo_name = NULL; |
| 26 | |
| 27 | void |
| 28 | print_usage() |
| 29 | { |
| 30 | printf( |
| 31 | "%s: [OPT ...] FIFO\n" |
| 32 | "\n" |
| 33 | "FIFO = string # path to fifo file\n" |
| 34 | "OPT = -i int # interval\n" |
| 35 | " | -f string # format string\n" |
| 36 | " | -h # help message (i.e. what you're reading now :) )\n", |
| 37 | argv0); |
| 38 | } |
| 39 | |
| 40 | void |
| 41 | opt_parse(int argc, char **argv) |
| 42 | { |
| 43 | char c; |
| 44 | |
| 45 | while ((c = getopt(argc, argv, "f:i:h")) != -1) |
| 46 | switch (c) { |
| 47 | case 'f': |
| 48 | opt_fmt = calloc(strlen(optarg), sizeof(char)); |
| 49 | strcpy(opt_fmt, optarg); |
| 50 | break; |
| 51 | case 'i': |
| 52 | opt_interval = atof(optarg); |
| 53 | break; |
| 54 | case 'h': |
| 55 | print_usage(); |
| 56 | exit(EXIT_SUCCESS); |
| 57 | case '?': |
| 58 | if (optopt == 'f' || optopt == 'i') |
| 59 | fprintf(stderr, |
| 60 | "Option -%c requires an argument.\n", |
| 61 | optopt); |
| 62 | else if (isprint(optopt)) |
| 63 | fprintf (stderr, |
| 64 | "Unknown option `-%c'.\n", |
| 65 | optopt); |
| 66 | else |
| 67 | fprintf(stderr, |
| 68 | "Unknown option character `\\x%x'.\n", |
| 69 | optopt); |
| 70 | exit(EXIT_FAILURE); |
| 71 | default: |
| 72 | assert(0); |
| 73 | } |
| 74 | fifo_name = argv[optind]; |
| 75 | debug("fifo_name: %s\n", fifo_name); |
| 76 | if (!fifo_name) |
| 77 | usage("No filename was provided\n"); |
| 78 | } |
| 79 | |
| 80 | int |
| 81 | get_time(char *buf, char *fmt) |
| 82 | { |
| 83 | time_t t; |
| 84 | |
| 85 | t = time(NULL); |
| 86 | strftime(buf, MAX_LEN, fmt, localtime(&t)); |
| 87 | return strlen(buf); |
| 88 | } |
| 89 | |
| 90 | int |
| 91 | main(int argc, char **argv) |
| 92 | { |
| 93 | argv0 = argv[0]; |
| 94 | |
| 95 | struct timespec ti; |
| 96 | char buf[MAX_LEN]; |
| 97 | |
| 98 | opt_parse(argc, argv); |
| 99 | |
| 100 | signal(SIGPIPE, SIG_IGN); /* Handled in loop */ |
| 101 | |
| 102 | memset(buf, '\0', MAX_LEN); |
| 103 | ti = timespec_of_float(opt_interval); |
| 104 | loop( |
| 105 | &ti, |
| 106 | fifo_name, |
| 107 | buf, |
| 108 | (SENSOR_FUN_T) get_time, |
| 109 | (SENSOR_PARAMS_T) opt_fmt |
| 110 | ); |
| 111 | return EXIT_SUCCESS; |
| 112 | } |