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117 lines
2.2 KiB
117 lines
2.2 KiB
6 years ago
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#include <litc.h>
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void dprint(int fd, char *par, int left, int rec)
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{
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printf("%s/:\n", par);
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char *pend = par + strlen(par);
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snprintf(pend, left, "/");
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left--;
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pend = par + strlen(par);
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DIR *dir = fdopendir(fd);
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if (!dir)
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err(-1, "fdopendir");
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struct dirent des, *de;
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int ret;
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while (1) {
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ret = readdir_r(dir, &des, &de);
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if (ret)
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errx(-1, "readdir_r %s", strerror(ret));
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if (!de)
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break;
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int used = snprintf(pend, left, "%s", de->d_name);
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if (used >= left)
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errx(-1, "long filenames!");
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char *fn = par;
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struct stat st;
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if (stat(fn, &st))
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err(-1, "stat");
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char spec;
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if (S_ISDIR(st.st_mode))
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spec = 'd';
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else if (S_ISSOCK(st.st_mode))
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spec = 's';
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else
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spec = '-';
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printf("%crwxr-xr-x %ld %s\n", spec, st.st_size, de->d_name);
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}
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if (!rec) {
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if (closedir(dir) == -1)
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err(-1, "closedir");
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return;
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}
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// recursive list
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*pend = 0;
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rewinddir(dir);
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while (1) {
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ret = readdir_r(dir, &des, &de);
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if (ret)
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errx(-1, "readdir_r %s", strerror(ret));
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if (!de)
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break;
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char *tn = de->d_name;
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if (strncmp(tn, "..", 3) == 0 ||
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strncmp(tn, ".", 2) == 0)
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continue;
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snprintf(pend, left, "%s", tn);
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char *fn = par;
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struct stat st;
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if (stat(fn, &st))
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err(-1, "stat");
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if (S_ISDIR(st.st_mode)) {
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int tfd = open(fn, O_RDONLY | O_DIRECTORY, 0);
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if (tfd < 0)
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err(-1, "rec open");
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dprint(tfd, par, left - strlen(pend), 1);
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// dprint closes tfd
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}
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}
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if (closedir(dir) == -1)
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err(-1, "closedir");
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}
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__attribute__((noreturn))
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void usage(void)
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{
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fprintf(stderr, "%s [-R]\n"
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"-R recurse subdirectories\n"
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"\n", __progname);
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exit(-1);
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}
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int main(int argc, char **argv)
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{
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int rec = 0;
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int ch;
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while ((ch = getopt(argc, argv, "R")) != -1) {
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switch (ch) {
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case 'R':
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rec = 1;
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break;
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default:
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usage();
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break;
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}
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}
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char *start;
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int rem = argc - optind;
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if (rem == 0)
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start = ".";
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else if (rem == 1)
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start = argv[optind];
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else
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usage();
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int fd;
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if ((fd = open(start, O_RDONLY | O_DIRECTORY, 0)) == -1)
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err(-1, "open %s", start);
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char pbuf[256];
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strncpy(pbuf, start, sizeof(pbuf));
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dprint(fd, pbuf, sizeof(pbuf) - strlen(pbuf), rec);
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close(fd);
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return 0;
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}
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