100 lines
2 KiB
C
100 lines
2 KiB
C
/* See LICENSE file for copyright and license details. */
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#include <dirent.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/stat.h>
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static void die(const char *s);
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static int qstrcmp(const void *a, const void *b);
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static void scan(void);
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static int uptodate(void);
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static char **items = NULL;
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static const char *home, *path;
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int
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main(void) {
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if(!(home = getenv("HOME")))
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die("no $HOME");
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if(!(path = getenv("PATH")))
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die("no $PATH");
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if(chdir(home) < 0)
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die("chdir failed");
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if(uptodate()) {
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execl("/bin/cat", "cat", CACHE, NULL);
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die("exec failed");
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}
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scan();
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return EXIT_SUCCESS;
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}
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void
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die(const char *s) {
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fprintf(stderr, "dmenu_path: %s\n", s);
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exit(EXIT_FAILURE);
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}
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int
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qstrcmp(const void *a, const void *b) {
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return strcmp(*(const char **)a, *(const char **)b);
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}
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void
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scan(void) {
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char buf[PATH_MAX];
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char *dir, *p;
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size_t i, count;
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struct dirent *ent;
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DIR *dp;
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FILE *cache;
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count = 0;
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if(!(p = strdup(path)))
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die("strdup failed");
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for(dir = strtok(p, ":"); dir; dir = strtok(NULL, ":")) {
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if(!(dp = opendir(dir)))
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continue;
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while((ent = readdir(dp))) {
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snprintf(buf, sizeof buf, "%s/%s", dir, ent->d_name);
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if(ent->d_name[0] == '.' || access(buf, X_OK) < 0)
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continue;
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if(!(items = realloc(items, ++count * sizeof *items)))
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die("malloc failed");
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if(!(items[count-1] = strdup(ent->d_name)))
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die("strdup failed");
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}
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closedir(dp);
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}
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qsort(items, count, sizeof *items, qstrcmp);
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if(!(cache = fopen(CACHE, "w")))
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die("open failed");
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for(i = 0; i < count; i++) {
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if(i > 0 && !strcmp(items[i], items[i-1]))
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continue;
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fprintf(cache, "%s\n", items[i]);
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fprintf(stdout, "%s\n", items[i]);
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}
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fclose(cache);
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free(p);
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}
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int
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uptodate(void) {
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char *dir, *p;
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time_t mtime;
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struct stat st;
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if(stat(CACHE, &st) < 0)
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return 0;
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mtime = st.st_mtime;
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if(!(p = strdup(path)))
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die("strdup failed");
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for(dir = strtok(p, ":"); dir; dir = strtok(NULL, ":"))
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if(!stat(dir, &st) && st.st_mtime > mtime)
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return 0;
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free(p);
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return 1;
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}
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