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#ifndef _POSIX_C_SOURCE
#define _POSIX_C_SOURCE 200809L
#endif
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
const int EXIT_ERROR = 1;
const int EXIT_USAGE = 2;
int usage(FILE *stream) {
const char *const msg = "Usage: remembering -p PROFILE -c COMMAND\n";
if (fprintf(stream, msg) < 0) {
perror("usage()");
return -1;
}
return 0;
}
int help(FILE *stream) {
const char *const msg =
"Options:\n"
" -p, PROFILE profile to be used for gathering and storing data\n"
" -c, COMMAND commant to be run, reading from STDIN, writing to STDOUT\n"
" -h, --help show this help\n"
" -V, --version print the version number\n"
"\nSee \"man remembering\" for more information\n";
if (fprintf(stream, msg) < 0) {
perror("help()");
return -1;
}
return 0;
}
int version(FILE *stream) {
const char *const msg = "remembering-" VERSION " " DATE "\n";
if (fprintf(stream, msg) < 0) {
perror("version()");
return -1;
}
return 0;
}
int missing(FILE *stream, const char *const argument) {
const char *const msg = "Missing option: %s\n";
if (fprintf(stream, msg, argument) < 0) {
perror("missing()");
return -1;
}
return 0;
}
int main(int argc, char *argv[]) {
#ifdef TEST
return EXIT_SUCCESS;
#endif
for (int i = 0; i < argc; i++) {
if (strcmp("--", argv[i]) == 0) {
break;
} else if (strcmp("--help", argv[i]) == 0) {
if (usage(stdout)) return EXIT_ERROR;
if (help(stdout)) return EXIT_ERROR;
return EXIT_SUCCESS;
} else if (strcmp("--version", argv[i]) == 0) {
if (version(stdout)) return EXIT_ERROR;
return EXIT_SUCCESS;
}
}
int option;
const char *profile = NULL;
const char *command = NULL;
while ((option = getopt(argc, argv, "p:c:hV")) != -1) {
switch (option) {
case 'p':
profile = optarg;
break;
case 'c':
command = optarg;
break;
case 'h':
if (usage(stdout)) return EXIT_ERROR;
if (help(stdout)) return EXIT_ERROR;
return EXIT_SUCCESS;
case 'V':
if (version(stdout)) return EXIT_ERROR;
return EXIT_SUCCESS;
default:
if (usage(stderr)) return EXIT_ERROR;
return EXIT_USAGE;
}
}
if (!profile) {
if (missing(stderr, "-p PROFILE")) return EXIT_ERROR;
if (usage(stderr)) return EXIT_ERROR;
return EXIT_USAGE;
}
if (!command) {
if (missing(stderr, "-c COMMAND")) return EXIT_ERROR;
if (usage(stderr)) return EXIT_ERROR;
return EXIT_USAGE;
}
return 0;
}
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