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#include <dirent.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
int
dfs(char *path) {
struct dirent *dp;
int dfd, i;
DIR *d = opendir(path);
if (d == NULL) {
perror(path);
return 1;
}
dfd = dirfd(d);
i = 0;
while ((dp = readdir(d)) != NULL) {
struct stat sb;
if (strcmp(dp->d_name, ".") == 0 ||
strcmp(dp->d_name, "..") == 0)
continue;
i++;
fstatat(dfd, dp->d_name, &sb, 0);
if (S_ISDIR(sb.st_mode)) {
char *fullpath = calloc(1, strlen(path) + strlen(dp->d_name) + 2);
if (fullpath == NULL) {
perror("calloc");
exit(1);
}
strcat(fullpath, path);
strcat(fullpath, "/");
strcat(fullpath, dp->d_name);
dfs(fullpath);
free(fullpath);
}
}
if (i == 0)
printf("%s\n", path);
closedir(d);
return 0;
}
int
main(int argc, char **argv) {
if (argc == 1) {
fprintf(stderr, "usage: %s dir...\n", argv[0]);
return 1;
}
while (*(++argv)) {
dfs(*argv);
}
return 0;
}
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