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#include <dirent.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include "log.h"
#include "string_vec.h"
struct string_vec compgen()
{
log_debug("Retrieving PATH.\n");
const char *env_path = getenv("PATH");
if (env_path == NULL) {
log_error("Couldn't retrieve PATH from environment.");
exit(EXIT_FAILURE);
}
struct string_vec programs = string_vec_create();
char *path = strdup(env_path);
char *saveptr = NULL;
char *path_entry = strtok_r(path, ":", &saveptr);
log_debug("Scanning PATH for binaries.\n");
while (path_entry != NULL) {
DIR *dir = opendir(path_entry);
if (dir != NULL) {
int fd = dirfd(dir);
struct dirent *d;
while ((d = readdir(dir)) != NULL) {
struct stat sb;
if (fstatat(fd, d->d_name, &sb, 0) == -1) {
continue;
}
if (!(sb.st_mode & S_IXUSR)) {
continue;
}
if (!S_ISREG(sb.st_mode)) {
continue;
}
string_vec_add(&programs, d->d_name);
}
closedir(dir);
}
path_entry = strtok_r(NULL, ":", &saveptr);
}
free(path);
log_debug("Sorting results.\n");
string_vec_sort(&programs);
log_debug("Making unique.\n");
string_vec_uniq(&programs);
log_debug("Done.\n");
return programs;
}
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