diff options
Diffstat (limited to 'bin/chmod')
| -rw-r--r-- | bin/chmod/Makefile | 5 | ||||
| -rw-r--r-- | bin/chmod/chmod.1 | 258 | ||||
| -rw-r--r-- | bin/chmod/chmod.c | 184 |
3 files changed, 447 insertions, 0 deletions
diff --git a/bin/chmod/Makefile b/bin/chmod/Makefile new file mode 100644 index 000000000000..027fee730e74 --- /dev/null +++ b/bin/chmod/Makefile @@ -0,0 +1,5 @@ +# @(#)Makefile 5.2 (Berkeley) 5/11/90 + +PROG= chmod + +.include <bsd.prog.mk> diff --git a/bin/chmod/chmod.1 b/bin/chmod/chmod.1 new file mode 100644 index 000000000000..2de3c019deb7 --- /dev/null +++ b/bin/chmod/chmod.1 @@ -0,0 +1,258 @@ +.\" Copyright (c) 1989, 1990 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 6.15 (Berkeley) 7/23/91 +.\" +.Dd July 23, 1991 +.Dt CHMOD 1 +.Os +.Sh NAME +.Nm chmod +.Nd change file modes +.Sh SYNOPSIS +.Nm chmod +.Op Fl R +.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 R +Traverse a file hierarchy. +For each file that is of type directory, +.Nm chmod +changes the mode of all files in the file hierarchy below it followed +by the mode of the directory itself. +.El +.Pp +Symbolic links are not indirected through, nor are their modes altered. +.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 Ap 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 +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 it is ignored in all other cases. +.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 , +the mode bits represented by +.Ar perm +are cleared for the owner, group and other permissions. +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 writeable 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 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 000000000000..a67e3f91c434 --- /dev/null +++ b/bin/chmod/chmod.c @@ -0,0 +1,184 @@ +/* + * 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 */ +} |