doing a chflags on a directory causing a cycle is probably the

[unix-history] / usr / src / usr.bin / chflags / chflags.c

/*
* Copyright (c) 1992, 1993, 1994
*      The Regents of the University of California.  All rights reserved.
*
* %sccs.include.redist.c%
*/

#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1992, 1993, 1994\n\
       The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)chflags.c   8.4 (Berkeley) %G%";
#endif /* not lint */

#include <sys/types.h>
#include <sys/stat.h>

#include <err.h>
#include <errno.h>
#include <fts.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

u_long  string_to_flags __P((char **, u_long *, u_long *));
void    usage __P((void));

int
main(argc, argv)
       int argc;
       char *argv[];
{
       FTS *ftsp;
       FTSENT *p;
       u_long clear, set;
       long val;
       int Hflag, Lflag, Pflag, Rflag, ch, fts_options, oct, rval;
       char *flags, *ep;

       Hflag = Lflag = Pflag = Rflag = 0;
       while ((ch = getopt(argc, argv, "HLPR")) != EOF)
               switch (ch) {
               case 'H':
                       Hflag = 1;
                       Lflag = Pflag = 0;
                       break;
               case 'L':
                       Lflag = 1;
                       Hflag = Pflag = 0;
                       break;
               case 'P':
                       Pflag = 1;
                       Hflag = Lflag = 0;
                       break;
               case 'R':
                       Rflag = 1;
                       break;
               case '?':
               default:
                       usage();
               }
       argv += optind;
       argc -= optind;

       if (argc < 2)
               usage();

       fts_options = FTS_PHYSICAL;
       if (Rflag) {
               if (Hflag)
                       fts_options |= FTS_COMFOLLOW;
               if (Lflag) {
                       fts_options &= ~FTS_PHYSICAL;
                       fts_options |= FTS_LOGICAL;
               }
       }

       flags = *argv;
       if (*flags >= '0' && *flags <= '7') {
               errno = 0;
               val = strtol(flags, &ep, 8);
               if (val < 0)
                       errno = ERANGE;
               if (errno)
                       err(1, "invalid flags: %s", flags);
               if (*ep)
                       errx(1, "invalid flags: %s", flags);
               set = val;
               oct = 1;
       } else {
               if (string_to_flags(&flags, &set, &clear))
                       errx(1, "invalid flag: %s", flags);
               clear = ~clear;
               oct = 0;
       }

       if ((ftsp = fts_open(++argv, fts_options , 0)) == NULL)
               err(1, NULL); 

       for (rval = 0; (p = fts_read(ftsp)) != NULL;) {
               switch (p->fts_info) {
               case FTS_D:
                       if (Rflag)              /* Change it at FTS_DP. */
                               continue;
                       fts_set(ftsp, p, FTS_SKIP);
                       break;
               case FTS_DNR:                   /* Warn, chflag, continue. */
                       errno = p->fts_errno;
                       warn("%s", p->fts_path);
                       rval = 1;
                       break;
               case FTS_ERR:                   /* Warn, continue. */
               case FTS_NS:
                       errno = p->fts_errno;
                       warn("%s", p->fts_path);
                       rval = 1;
                       continue;
               case FTS_SL:                    /* Ignore. */
               case FTS_SLNONE:
                       /*
                        * The only symlinks that end up here are ones that
                        * don't point to anything and ones that we found
                        * doing a physical walk.
                        */
                       continue;
               default:
                       break;
               }
               if (oct) {
                       if (!chflags(p->fts_accpath, set))
                               continue;
               } else {
                       p->fts_statp->st_flags |= set;
                       p->fts_statp->st_flags &= clear;
                       if (!chflags(p->fts_accpath, p->fts_statp->st_flags))
                               continue;
               }
               warn("%s", p->fts_path);
               rval = 1;
       }
       if (errno)
               err(1, "fts_read");
       exit(rval);
}

void
usage()
{
       (void)fprintf(stderr,
           "usage: chflags [-R [-H | -L | -P]] flags file ...\n");
       exit(1);
}