diff options
Diffstat (limited to 'bin/chmod')
| -rw-r--r-- | bin/chmod/Makefile | 6 | ||||
| -rw-r--r-- | bin/chmod/chmod.1 | 297 | ||||
| -rw-r--r-- | bin/chmod/chmod.c | 209 |
3 files changed, 512 insertions, 0 deletions
diff --git a/bin/chmod/Makefile b/bin/chmod/Makefile new file mode 100644 index 00000000000..eee50579238 --- /dev/null +++ b/bin/chmod/Makefile @@ -0,0 +1,6 @@ +# $NetBSD: Makefile,v 1.6 1995/03/21 09:02:06 cgd Exp $ +# @(#)Makefile 8.1 (Berkeley) 5/31/93 + +PROG= chmod + +.include <bsd.prog.mk> diff --git a/bin/chmod/chmod.1 b/bin/chmod/chmod.1 new file mode 100644 index 00000000000..36428880344 --- /dev/null +++ b/bin/chmod/chmod.1 @@ -0,0 +1,297 @@ +.\" $NetBSD: chmod.1,v 1.8 1995/03/21 09:02:07 cgd Exp $ +.\" +.\" Copyright (c) 1989, 1990, 1993, 1994 +.\" The Regents of the University of California. All rights reserved. +.\" +.\" This code is derived from software contributed to Berkeley by +.\" the Institute of Electrical and Electronics Engineers, Inc. +.\" +.\" 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. +.\" +.\" @(#)chmod.1 8.4 (Berkeley) 3/31/94 +.\" +.Dd March 31, 1994 +.Dt CHMOD 1 +.Os +.Sh NAME +.Nm chmod +.Nd change file modes +.Sh SYNOPSIS +.Nm chmod +.Oo +.Fl R +.Op Fl H | Fl L | Fl P +.Oc +.Ar mode +.Ar file ... +.Sh DESCRIPTION +The +.Nm chmod +utility modifies the file mode bits of the listed files +as specified by the +.Ar mode +operand. +.Pp +The options are as follows: +.Bl -tag -width Ds +.It Fl H +If the +.Fl R +option is specified, symbolic links on the command line are followed. +(Symbolic links encountered in the tree traversal are not followed.) +.It Fl L +If the +.Fl R +option is specified, all symbolic links are followed. +.It Fl P +If the +.Fl R +option is specified, no symbolic links are followed. +.It Fl R +Change the modes of the file hierarchies rooted in the files +instead of just the files themselves. +.El +.Pp +Symbolic links do not have modes, so unless the +.Fl H +or +.Fl L +option is set, +.Nm chmod +on a symbolic link always succeeds and has no effect. +The +.Fl H , +.Fl L +and +.Fl P +options are ignored unless the +.Fl R +option is specified. +In addition, these options override each other and the +command's actions are determined by the last one specified. +.Pp +Only the owner of a file or the super-user is permitted to change +the mode of a file. +.Pp +The +.Nm chmod +utility exits 0 on success, and >0 if an error occurs. +.Sh MODES +Modes may be absolute or symbolic. +An absolute mode is an octal number constructed by +.Ar or-ing +the following values: +.Pp +.Bl -tag -width 6n -compact -offset indent +.It Li 4000 +set-user-ID-on-execution +.It Li 2000 +set-group-ID-on-execution +.It Li 1000 +sticky bit, see chmod(2) +.It Li 0400 +read by owner +.It Li 0200 +write by owner +.It Li 0100 +execute (or search for directories) by owner +.It Li 0070 +read, write, execute/search by group +.It Li 0007 +read, write, execute/search by others +.El +.Pp +The read, write, and execute/search values for group and others +are encoded as described for owner. +.Pp +The symbolic mode is described by the following grammar: +.Bd -literal -offset indent +mode ::= clause [, clause ...] +clause ::= [who ...] [action ...] last_action +action ::= op [perm ...] +last_action ::= op [perm ...] +who ::= a | u | g | o +op ::= + | \- | = +perm ::= r | s | t | w | x | X | u | g | o +.Ed +.Pp +The +.Ar who +symbols ``u'', ``g'', and ``o'' specify the user, group, and other parts +of the mode bits, respectively. +The +.Ar who +symbol ``a'' is equivalent to ``ugo''. +.Pp +.ne 1i +The +.Ar perm +symbols represent the portions of the mode bits as follows: +.Pp +.Bl -tag -width Ds -compact -offset indent +.It r +The read bits. +.It s +The set-user-ID-on-execution and set-group-ID-on-execution bits. +.It t +The sticky bit. +.It w +The write bits. +.It x +The execute/search bits. +.It X +The execute/search bits if the file is a directory or any of the +execute/search bits are set in the original (unmodified) mode. +Operations with the +.Ar perm +symbol ``X'' are only meaningful in conjunction with the +.Ar op +symbol ``+'', and are ignored in all other cases. +.It u +The user permission bits in the mode of the original file. +.It g +The group permission bits in the mode of the original file. +.It o +The other permission bits in the mode of the original file. +.El +.Pp +The +.Ar op +symbols represent the operation performed, as follows: +.Bl -tag -width 4n +.It + +If no value is supplied for +.Ar perm , +the ``+'' operation has no effect. +If no value is supplied for +.Ar who , +each permission bit specified in +.Ar perm , +for which the corresponding bit in the file mode creation mask +is clear, is set. +Otherwise, the mode bits represented by the specified +.Ar who +and +.Ar perm +values are set. +.It \&\- +If no value is supplied for +.Ar perm , +the ``\-'' operation has no effect. +If no value is supplied for +.Ar who , +each permission bit specified in +.Ar perm , +for which the corresponding bit in the file mode creation mask +is clear, is cleared. +Otherwise, the mode bits represented by the specified +.Ar who +and +.Ar perm +values are cleared. +.It = +The mode bits specified by the +.Ar who +value are cleared, or, if no who value is specified, the owner, group +and other mode bits are cleared. +Then, if no value is supplied for +.Ar who , +each permission bit specified in +.Ar perm , +for which the corresponding bit in the file mode creation mask +is clear, is set. +Otherwise, the mode bits represented by the specified +.Ar who +and +.Ar perm +values are set. +.El +.Pp +Each +.Ar clause +specifies one or more operations to be performed on the mode +bits, and each operation is applied to the mode bits in the +order specified. +.Pp +Operations upon the other permissions only (specified by the symbol +``o'' by itself), in combination with the +.Ar perm +symbols ``s'' or ``t'', are ignored. +.Sh EXAMPLES +.Bl -tag -width "u=rwx,go=u-w" -compact +.It Li 644 +make a file readable by anyone and writable by the owner only. +.Pp +.It Li go-w +deny write permission to group and others. +.Pp +.It Li =rw,+X +set the read and write permissions to the usual defaults, but +retain any execute permissions that are currently set. +.Pp +.It Li +X +make a directory or file searchable/executable by everyone if it is +already searchable/executable by anyone. +.Pp +.It Li 755 +.It Li u=rwx,go=rx +.It Li u=rwx,go=u-w +make a file readable/executable by everyone and writable by the owner only. +.Pp +.It Li go= +clear all mode bits for group and others. +.Pp +.It Li g=u-w +set the group bits equal to the user bits, but clear the group write bit. +.El +.Sh BUGS +There's no +.Ar perm +option for the naughty bits. +.Sh SEE ALSO +.Xr install 1 , +.Xr chmod 2 , +.Xr stat 2 , +.Xr umask 2 , +.Xr fts 3 , +.Xr setmode 3 , +.Xr symlink 7 , +.Xr chown 8 +.Sh STANDARDS +The +.Nm chmod +utility is expected to be +.St -p1003.2 +compatible with the exception of the +.Ar perm +symbols +.Dq t +and +.Dq X +which are not included in that standard. diff --git a/bin/chmod/chmod.c b/bin/chmod/chmod.c new file mode 100644 index 00000000000..85f89749437 --- /dev/null +++ b/bin/chmod/chmod.c @@ -0,0 +1,209 @@ +/* $NetBSD: chmod.c,v 1.12 1995/03/21 09:02:09 cgd Exp $ */ + +/* + * Copyright (c) 1989, 1993, 1994 + * 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 +static char copyright[] = +"@(#) Copyright (c) 1989, 1993, 1994\n\ + The Regents of the University of California. All rights reserved.\n"; +#endif /* not lint */ + +#ifndef lint +#if 0 +static char sccsid[] = "@(#)chmod.c 8.8 (Berkeley) 4/1/94"; +#else +static char rcsid[] = "$NetBSD: chmod.c,v 1.12 1995/03/21 09:02:09 cgd Exp $"; +#endif +#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> +#include <limits.h> + +void usage __P((void)); + +int +main(argc, argv) + int argc; + char *argv[]; +{ + FTS *ftsp; + FTSENT *p; + mode_t *set; + long val; + int oct, omode; + int Hflag, Lflag, Pflag, Rflag, ch, fflag, fts_options, hflag, rval; + char *ep, *mode; + + Hflag = Lflag = Pflag = Rflag = fflag = hflag = 0; + while ((ch = getopt(argc, argv, "HLPRXfgorstuwx")) != -1) + 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 'f': /* XXX: undocumented. */ + fflag = 1; + break; + case 'h': + /* + * In System V (and probably POSIX.2) the -h option + * causes chmod to change the mode of the symbolic + * link. 4.4BSD's symbolic links don't have modes, + * so it's an undocumented noop. Do syntax checking, + * though. + */ + hflag = 1; + break; + /* + * XXX + * "-[rwx]" are valid mode commands. If they are the entire + * argument, getopt has moved past them, so decrement optind. + * Regardless, we're done argument processing. + */ + case 'g': case 'o': case 'r': case 's': + case 't': case 'u': case 'w': case 'X': case 'x': + if (argv[optind - 1][0] == '-' && + argv[optind - 1][1] == ch && + argv[optind - 1][2] == '\0') + --optind; + goto done; + case '?': + default: + usage(); + } +done: argv += optind; + argc -= optind; + + if (argc < 2) + usage(); + + fts_options = FTS_PHYSICAL; + if (Rflag) { + if (hflag) + errx(1, + "the -R and -h options may not be specified together."); + if (Hflag) + fts_options |= FTS_COMFOLLOW; + if (Lflag) { + fts_options &= ~FTS_PHYSICAL; + fts_options |= FTS_LOGICAL; + } + } + + mode = *argv; + if (*mode >= '0' && *mode <= '7') { + errno = 0; + val = strtol(mode, &ep, 8); + if (val > INT_MAX || val < 0) + errno = ERANGE; + if (errno) + err(1, "invalid file mode: %s", mode); + if (*ep) + errx(1, "invalid file mode: %s", mode); + omode = val; + oct = 1; + } else { + if ((set = setmode(mode)) == NULL) + errx(1, "invalid file mode: %s", mode); + 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) + fts_set(ftsp, p, FTS_SKIP); + break; + case FTS_DNR: /* Warn, chmod, continue. */ + warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); + rval = 1; + break; + case FTS_DP: /* Already changed at FTS_D. */ + continue; + case FTS_ERR: /* Warn, continue. */ + case FTS_NS: + warnx("%s: %s", p->fts_path, strerror(p->fts_errno)); + 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 (chmod(p->fts_accpath, oct ? omode : + getmode(set, p->fts_statp->st_mode)) && !fflag) { + warn(p->fts_path); + rval = 1; + } + } + if (errno) + err(1, "fts_read"); + exit(rval); +} + +void +usage() +{ + (void)fprintf(stderr, + "usage: chmod [-R [-H | -L | -P]] mode file ...\n"); + exit(1); +} |