bin/chmod/chmod.c

/*
 * Copyright (c) 1989 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1989 The Regents of the University of California.\n\
 All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)chmod.c     5.21 (Berkeley) 1/27/92";
#endif /* not lint */

#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <fts.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int retval;

void err __P((const char *, ...));
void error __P((char *));
void usage __P((void));

int
main(argc, argv)
        int argc;
        char *argv[];
{
        register FTS *fts;
        register FTSENT *p;
        register int oct, omode;
        struct stat sb;
        mode_t *set;
        int ch, fflag, rflag;
        char *ep, *mode;

        fflag = rflag = 0;
        while ((ch = getopt(argc, argv, "Rfrwx")) != EOF)
                switch((char)ch) {
                case 'R':
                        rflag = 1;
                        break;
                case 'f':               /* no longer documented */
                        fflag = 1;
                        break;
                case 'r':               /* "-[rwx]" are valid file modes */
                case 'w':
                case 'x':
                        --optind;
                        goto done;
                case '?':
                default:
                        usage();
                }
done:   argv += optind;
        argc -= optind;

        if (argc < 2)
                usage();

        mode = *argv;
        if (*mode >= '0' && *mode <= '7') {
                omode = (int)strtol(mode, &ep, 8);
                if (omode < 0 || *ep)
                        err("invalid file mode: %s", mode);
                oct = 1;
        } else {
                if (!(set = setmode(mode)))
                        err("invalid file mode: %s", mode);
                oct = 0;
        }

        retval = 0;
        if (rflag) {
                if ((fts = fts_open(++argv,
                    oct ? FTS_NOSTAT|FTS_PHYSICAL : FTS_PHYSICAL, 0)) == NULL)
                        err("%s", strerror(errno));
                while (p = fts_read(fts))
                        switch(p->fts_info) {
                        case FTS_D:
                                break;
                        case FTS_DNR:
                        case FTS_ERR:
                        case FTS_NS:
                                err("%s: %s", p->fts_path, strerror(errno));
                        default:
                                if (chmod(p->fts_accpath, oct ? omode :
                                    getmode(set, p->fts_statp->st_mode)) &&
                                    !fflag)
                                        error(p->fts_path);
                                break;
                        }
                exit(retval);
        }
        if (oct) {
                while (*++argv)
                        if (chmod(*argv, omode) && !fflag)
                                error(*argv);
        } else
                while (*++argv)
                        if ((lstat(*argv, &sb) ||
                            chmod(*argv, getmode(set, sb.st_mode))) && !fflag)
                                error(*argv);
        exit(retval);
}

void
error(name)
        char *name;
{
        (void)fprintf(stderr, "chmod: %s: %s\n", name, strerror(errno));
        retval = 1;
}

void
usage()
{
        (void)fprintf(stderr, "usage: chmod [-R] mode file ...\n");
        exit(1);
}

#if __STDC__
#include <stdarg.h>
#else
#include <varargs.h>
#endif

void
#if __STDC__
err(const char *fmt, ...)
#else
err(fmt, va_alist)
        char *fmt;
        va_dcl
#endif
{
        va_list ap;
#if __STDC__
        va_start(ap, fmt);
#else
        va_start(ap);
#endif
        (void)fprintf(stderr, "chmod: ");
        (void)vfprintf(stderr, fmt, ap);
        va_end(ap);
        (void)fprintf(stderr, "\n");
        exit(1);
        /* NOTREACHED */
}