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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;
}
static 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;
}
static int version(FILE *stream) {
const char *const msg = "remembering-" VERSION " " DATE "\n";
if (fprintf(stream, msg) < 0) {
perror("version()");
return -1;
}
return 0;
}
static 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;
}
static char *get_profile_file(const char *const profile) {
char *home = NULL;
if (!(home = getenv("XDG_DATA_HOME"))) {
if (!(home = getenv("HOME"))) {
fprintf(stderr, "Unable to get $XDG_DATA_HOME or $HOME environment variables\n");
return NULL;
}
const char *const suffix = "/.local/share/remembering";
const size_t home_suffix_size =
strlen(home) +
strlen(suffix) +
sizeof(char);
char *const home_with_suffix = malloc(home_suffix_size);
if (!home_with_suffix) {
perror("get_profile_file() - home_with_suffix");
return NULL;
}
strcat(home_with_suffix, home);
strcat(home_with_suffix, suffix);
home = home_with_suffix;
} else {
if (!(home = strdup(home))) {
perror("get_profile_file() - strdup()");
return NULL;
}
}
size_t size =
strlen(home) +
strlen("/") +
strlen(profile) +
sizeof(char);
char *const profile_file = malloc(size);
if (!profile_file) {
perror("get_profile_file() - profile_file");
free(home);
return NULL;
}
strcat(profile_file, home);
strcat(profile_file, "/");
strcat(profile_file, profile);
return profile_file;
}
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;
}
char *const profile_file = get_profile_file(profile);
if(!profile_file) {
return EXIT_ERROR;
}
printf("profile: %s\ncommand: %s\n", profile, command);
printf("profile_file: %s\n", profile_file);
free(profile_file);
return 0;
}
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