source: MondoRescue/branches/2.2.5/mindi-busybox/libbb/remove_file.c

/* vi: set sw=4 ts=4: */
/*
 * Mini remove_file implementation for busybox
 *
 * Copyright (C) 2001 Matt Kraai <kraai@alumni.carnegiemellon.edu>
 *
 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
 */

#include "libbb.h"

/* Used from NOFORK applets. Must not allocate anything */

int remove_file(const char *path, int flags)
{
    struct stat path_stat;

    if (lstat(path, &path_stat) < 0) {
        if (errno != ENOENT) {
            bb_perror_msg("cannot stat '%s'", path);
            return -1;
        }
        if (!(flags & FILEUTILS_FORCE)) {
            bb_perror_msg("cannot remove '%s'", path);
            return -1;
        }
        return 0;
    }

    if (S_ISDIR(path_stat.st_mode)) {
        DIR *dp;
        struct dirent *d;
        int status = 0;

        if (!(flags & FILEUTILS_RECUR)) {
            bb_error_msg("%s: is a directory", path);
            return -1;
        }

        if ((!(flags & FILEUTILS_FORCE) && access(path, W_OK) < 0 && isatty(0))
         || (flags & FILEUTILS_INTERACTIVE)
        ) {
            fprintf(stderr, "%s: descend into directory '%s'? ", applet_name,
                    path);
            if (!bb_ask_confirmation())
                return 0;
        }

        dp = opendir(path);
        if (dp == NULL) {
            return -1;
        }

        while ((d = readdir(dp)) != NULL) {
            char *new_path;

            new_path = concat_subpath_file(path, d->d_name);
            if (new_path == NULL)
                continue;
            if (remove_file(new_path, flags) < 0)
                status = -1;
            free(new_path);
        }

        if (closedir(dp) < 0) {
            bb_perror_msg("cannot close '%s'", path);
            return -1;
        }

        if (flags & FILEUTILS_INTERACTIVE) {
            fprintf(stderr, "%s: remove directory '%s'? ", applet_name, path);
            if (!bb_ask_confirmation())
                return status;
        }

        if (rmdir(path) < 0) {
            bb_perror_msg("cannot remove '%s'", path);
            return -1;
        }

        return status;
    }

    /* !ISDIR */
    if ((!(flags & FILEUTILS_FORCE) && access(path, W_OK) < 0
            && !S_ISLNK(path_stat.st_mode) && isatty(0))
     || (flags & FILEUTILS_INTERACTIVE)
    ) {
        fprintf(stderr, "%s: remove '%s'? ", applet_name, path);
        if (!bb_ask_confirmation())
            return 0;
    }

    if (unlink(path) < 0) {
        bb_perror_msg("cannot remove '%s'", path);
        return -1;
    }

    return 0;
}