93 lines
2.0 KiB
C
93 lines
2.0 KiB
C
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#include <stdio.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <dirent.h>
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#include <limits.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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static int usage()
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{
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fprintf(stderr,"rm [-rR] <target>\n");
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return -1;
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}
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/* return -1 on failure, with errno set to the first error */
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static int unlink_recursive(const char* name)
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{
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struct stat st;
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DIR *dir;
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struct dirent *de;
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int fail = 0;
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/* is it a file or directory? */
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if (lstat(name, &st) < 0)
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return -1;
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/* a file, so unlink it */
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if (!S_ISDIR(st.st_mode))
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return unlink(name);
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/* a directory, so open handle */
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dir = opendir(name);
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if (dir == NULL)
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return -1;
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/* recurse over components */
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errno = 0;
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while ((de = readdir(dir)) != NULL) {
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char dn[PATH_MAX];
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if (!strcmp(de->d_name, "..") || !strcmp(de->d_name, "."))
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continue;
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sprintf(dn, "%s/%s", name, de->d_name);
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if (unlink_recursive(dn) < 0) {
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fail = 1;
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break;
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}
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errno = 0;
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}
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/* in case readdir or unlink_recursive failed */
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if (fail || errno < 0) {
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int save = errno;
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closedir(dir);
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errno = save;
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return -1;
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}
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/* close directory handle */
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if (closedir(dir) < 0)
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return -1;
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/* delete target directory */
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return rmdir(name);
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}
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int rm_main(int argc, char *argv[])
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{
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int ret;
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int i = 1;
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int recursive = 0;
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if (argc < 2)
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return usage();
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/* check if recursive */
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if (argc >=2 && (!strcmp(argv[1], "-r") || !strcmp(argv[1], "-R"))) {
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recursive = 1;
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i = 2;
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}
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/* loop over the file/directory args */
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for (; i < argc; i++) {
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int ret = recursive ? unlink_recursive(argv[i]) : unlink(argv[i]);
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if (ret < 0) {
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fprintf(stderr, "rm failed for %s, %s\n", argv[i], strerror(errno));
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return -1;
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}
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}
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return 0;
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}
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