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xinstall.c revision 1.4 
      1 /*
      2  * Copyright (c) 1987 Regents of the University of California.
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  */
     33 
     34 #ifndef lint
     35 char copyright[] =
     36 "@(#) Copyright (c) 1987 Regents of the University of California.\n\
     37  All rights reserved.\n";
     38 #endif /* not lint */
     39 
     40 #ifndef lint
     41 /*static char sccsid[] = "from: @(#)xinstall.c	5.24 (Berkeley) 7/1/90";*/
     42 static char rcsid[] = "$Id: xinstall.c,v 1.4 1994/10/02 21:32:31 cgd Exp $";
     43 #endif /* not lint */
     44 
     45 #include <sys/param.h>
     46 #include <sys/stat.h>
     47 #include <sys/file.h>
     48 #include <grp.h>
     49 #include <pwd.h>
     50 #include <stdio.h>
     51 #include <ctype.h>
     52 #include <errno.h>
     53 #include <paths.h>
     54 #include "pathnames.h"
     55 
     56 static struct passwd *pp;
     57 static struct group *gp;
     58 static int docopy, dostrip, dodir, mode = 0755;
     59 static char *group, *owner, pathbuf[MAXPATHLEN];
     60 
     61 main(argc, argv)
     62 	int argc;
     63 	char **argv;
     64 {
     65 	extern char *optarg;
     66 	extern int optind;
     67 	struct stat from_sb, to_sb;
     68 	mode_t *set, *setmode();
     69 	int ch, no_target;
     70 	char *to_name;
     71 
     72 	while ((ch = getopt(argc, argv, "cg:m:o:sd")) != EOF)
     73 		switch((char)ch) {
     74 		case 'c':
     75 			docopy = 1;
     76 			break;
     77 		case 'g':
     78 			group = optarg;
     79 			break;
     80 		case 'm':
     81 			if (!(set = setmode(optarg))) {
     82 				(void)fprintf(stderr,
     83 				    "install: invalid file mode.\n");
     84 				exit(1);
     85 			}
     86 			mode = getmode(set, 0);
     87 			break;
     88 		case 'o':
     89 			owner = optarg;
     90 			break;
     91 		case 's':
     92 			dostrip = 1;
     93 			break;
     94 		case 'd':
     95 			dodir = 1;
     96 			break;
     97 		case '?':
     98 		default:
     99 			usage();
    100 		}
    101 	argc -= optind;
    102 	argv += optind;
    103 
    104 	/* copy and strip options make no sense when creating directories */
    105 	if ((docopy || dostrip) && dodir)
    106 		usage();
    107 
    108 	/* must have at least two arguments, except when creating directories */
    109 	if (argc < 2 && !dodir)
    110 		usage();
    111 
    112 	/* get group and owner id's */
    113 	if (group && !(gp = getgrnam(group))) {
    114 		fprintf(stderr, "install: unknown group %s.\n", group);
    115 		exit(1);
    116 	}
    117 	if (owner && !(pp = getpwnam(owner))) {
    118 		fprintf(stderr, "install: unknown user %s.\n", owner);
    119 		exit(1);
    120 	}
    121 
    122 	if (dodir) {
    123 		for (; *argv != NULL; ++argv)
    124 			build(*argv);
    125 		exit (0);
    126 		/* NOTREACHED */
    127 	}
    128 
    129 	no_target = stat(to_name = argv[argc - 1], &to_sb);
    130 	if (!no_target && S_ISDIR(to_sb.st_mode)) {
    131 		for (; *argv != to_name; ++argv)
    132 			install(*argv, to_name, 1);
    133 		exit(0);
    134 	}
    135 
    136 	/* can't do file1 file2 directory/file */
    137 	if (argc != 2)
    138 		usage();
    139 
    140 	if (!no_target) {
    141 		if (stat(*argv, &from_sb)) {
    142 			fprintf(stderr, "install: can't find %s.\n", *argv);
    143 			exit(1);
    144 		}
    145 		if (!S_ISREG(to_sb.st_mode)) {
    146 			fprintf(stderr, "install: %s isn't a regular file.\n", to_name);
    147 			exit(1);
    148 		}
    149 		if (to_sb.st_dev == from_sb.st_dev && to_sb.st_ino == from_sb.st_ino) {
    150 			fprintf(stderr, "install: %s and %s are the same file.\n", *argv, to_name);
    151 			exit(1);
    152 		}
    153 		/* unlink now... avoid ETXTBSY errors later */
    154 		(void)unlink(to_name);
    155 	}
    156 	install(*argv, to_name, 0);
    157 	exit(0);
    158 }
    159 
    160 /*
    161  * install --
    162  *	build a path name and install the file
    163  */
    164 install(from_name, to_name, isdir)
    165 	char *from_name, *to_name;
    166 	int isdir;
    167 {
    168 	struct stat from_sb;
    169 	int devnull, from_fd, to_fd;
    170 	char *C, *rindex();
    171 
    172 	/* if try to install NULL file to a directory, fails */
    173 	if (isdir || strcmp(from_name, _PATH_DEVNULL)) {
    174 		if (stat(from_name, &from_sb)) {
    175 			fprintf(stderr, "install: can't find %s.\n", from_name);
    176 			exit(1);
    177 		}
    178 		if (!S_ISREG(from_sb.st_mode)) {
    179 			fprintf(stderr, "install: %s isn't a regular file.\n", from_name);
    180 			exit(1);
    181 		}
    182 		/* build the target path */
    183 		if (isdir) {
    184 			(void)sprintf(pathbuf, "%s/%s", to_name, (C = rindex(from_name, '/')) ? ++C : from_name);
    185 			to_name = pathbuf;
    186 		}
    187 		devnull = 0;
    188 	} else
    189 		devnull = 1;
    190 
    191 	/* unlink now... avoid ETXTBSY errors later */
    192 	(void)unlink(to_name);
    193 
    194 	/* create target */
    195 	if ((to_fd = open(to_name, O_CREAT|O_WRONLY|O_TRUNC, 0600)) < 0) {
    196 		error(to_name);
    197 		exit(1);
    198 	}
    199 	if (!devnull) {
    200 		if ((from_fd = open(from_name, O_RDONLY, 0)) < 0) {
    201 			(void)unlink(to_name);
    202 			error(from_name);
    203 			exit(1);
    204 		}
    205 		copy(from_fd, from_name, to_fd, to_name);
    206 		(void)close(from_fd);
    207 	}
    208 	if (dostrip)
    209 		strip(to_name);
    210 	/*
    211 	 * set owner, group, mode for target; do the chown first,
    212 	 * chown may lose the setuid bits.
    213 	 */
    214 	if ((group || owner) &&
    215 	    fchown(to_fd, owner ? pp->pw_uid : -1, group ? gp->gr_gid : -1) ||
    216 	    fchmod(to_fd, mode)) {
    217 		error(to_name);
    218 		bad(to_name);
    219 	}
    220 	(void)close(to_fd);
    221 	if (!docopy && !devnull && unlink(from_name)) {
    222 		error(from_name);
    223 		exit(1);
    224 	}
    225 }
    226 
    227 /*
    228  * copy --
    229  *	copy from one file to another
    230  */
    231 copy(from_fd, from_name, to_fd, to_name)
    232 	register int from_fd, to_fd;
    233 	char *from_name, *to_name;
    234 {
    235 	register int n;
    236 	char buf[MAXBSIZE];
    237 
    238 	while ((n = read(from_fd, buf, sizeof(buf))) > 0)
    239 		if (write(to_fd, buf, n) != n) {
    240 			error(to_name);
    241 			bad(to_name);
    242 		}
    243 	if (n == -1) {
    244 		error(from_name);
    245 		bad(to_name);
    246 	}
    247 }
    248 
    249 /*
    250  * strip --
    251  *	use strip(1) to strip the target file
    252  */
    253 strip(to_name)
    254 	char *to_name;
    255 {
    256 	int status;
    257 
    258 	switch (vfork()) {
    259 	case -1:
    260 		error("fork");
    261 		bad(to_name);
    262 	case 0:
    263 		execl(_PATH_STRIP, "strip", to_name, (char *)NULL);
    264 		error(_PATH_STRIP);
    265 		_exit(1);
    266 	default:
    267 		if (wait(&status) == -1 || status)
    268 			bad(to_name);
    269 	}
    270 }
    271 
    272 /*
    273  * build --
    274  *	build directory heirarchy
    275  */
    276 build(path)
    277         char *path;
    278 {
    279         register char *p;
    280         struct stat sb;
    281         int ch;
    282 
    283         for (p = path;; ++p)
    284                 if (!*p || (p != path && *p  == '/')) {
    285                         ch = *p;
    286                         *p = '\0';
    287                         if (stat(path, &sb)) {
    288                                 if (errno != ENOENT || mkdir(path, 0777) < 0) {
    289                                         error(path);
    290                                         return(1);
    291                                 }
    292                         }
    293                         if (!(*p = ch))
    294 				break;
    295                 }
    296 
    297 	if ((group || owner) &&
    298             chown(path, owner ? pp->pw_uid : -1, group ? gp->gr_gid : -1) ||
    299             chmod(path, mode)) {
    300                 error(path);
    301         }
    302 
    303         return(0);
    304 }
    305 
    306 /*
    307  * error --
    308  *	print out an error message
    309  */
    310 error(s)
    311 	char *s;
    312 {
    313 	extern int errno;
    314 	char *strerror();
    315 
    316 	(void)fprintf(stderr, "install: %s: %s\n", s, strerror(errno));
    317 }
    318 
    319 /*
    320  * bad --
    321  *	remove created target and die
    322  */
    323 bad(fname)
    324 	char *fname;
    325 {
    326 	(void)unlink(fname);
    327 	exit(1);
    328 }
    329 
    330 /*
    331  * usage --
    332  *	print a usage message and die
    333  */
    334 usage()
    335 {
    336 	(void)fprintf(stderr, "\
    337 usage: install [-cs] [-g group] [-m mode] [-o owner] file1 file2\n\
    338        install [-cs] [-g group] [-m mode] [-o owner] file1 ... fileN directory\n\
    339        install  -d   [-g group] [-m mode] [-o owner] directory ...\n");
    340 	exit(1);
    341 }
    342