michael@0: /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /*
michael@0: ** Netscape portable install command.
michael@0: **
michael@0: ** Brendan Eich, 7/20/95
michael@0: */
michael@0: #include <stdio.h>  /* OSF/1 requires this before grp.h, so put it first */
michael@0: #include <assert.h>
michael@0: #include <fcntl.h>
michael@0: #include <grp.h>
michael@0: #include <pwd.h>
michael@0: #include <stdlib.h>
michael@0: #include <string.h>
michael@0: #include <unistd.h>
michael@0: #include <utime.h>
michael@0: #include <sys/types.h>
michael@0: #include <sys/stat.h>
michael@0: #include <dirent.h>
michael@0: #include <errno.h>
michael@0: #include <stdarg.h>
michael@0: #ifdef USE_REENTRANT_LIBC
michael@0: #include "libc_r.h"
michael@0: #endif /* USE_REENTRANT_LIBC */
michael@0: 
michael@0: #include "pathsub.h"
michael@0: 
michael@0: #define HAVE_FCHMOD
michael@0: 
michael@0: #if defined(BEOS)
michael@0: #undef HAVE_FCHMOD
michael@0: #endif
michael@0: 
michael@0: /*
michael@0:  * Does getcwd() take NULL as the first argument and malloc
michael@0:  * the result buffer?
michael@0:  */
michael@0: #if !defined(DARWIN)
michael@0: #define GETCWD_CAN_MALLOC
michael@0: #endif
michael@0: 
michael@0: #if defined(LINUX) || defined(__GNU__) || defined(__GLIBC__) 
michael@0: #include <getopt.h>
michael@0: #endif
michael@0: 
michael@0: #if defined(SCO) || defined(UNIXWARE)
michael@0: #if !defined(S_ISLNK) && defined(S_IFLNK)
michael@0: #define S_ISLNK(a)	(((a) & S_IFMT) == S_IFLNK)
michael@0: #endif
michael@0: #endif
michael@0: 
michael@0: #ifdef QNX
michael@0: #define d_ino d_stat.st_ino
michael@0: #endif
michael@0: 
michael@0: static void
michael@0: usage(void)
michael@0: {
michael@0:     fprintf(stderr,
michael@0: 	"usage: %s [-C cwd] [-L linkprefix] [-m mode] [-o owner] [-g group]\n"
michael@0: 	"       %*s [-DdltR] file [file ...] directory\n",
michael@0: 	program, (int)strlen(program), "");
michael@0:     exit(2);
michael@0: }
michael@0: 
michael@0: static int
michael@0: mkdirs(char *path, mode_t mode)
michael@0: {
michael@0:     char *cp;
michael@0:     struct stat sb;
michael@0:     int res;
michael@0:     
michael@0:     while (*path == '/' && path[1] == '/')
michael@0: 	path++;
michael@0:     for (cp = strrchr(path, '/'); cp && cp != path && cp[-1] == '/'; cp--)
michael@0: 	;
michael@0:     if (cp && cp != path) {
michael@0: 	*cp = '\0';
michael@0: 	if ((stat(path, &sb) < 0 || !S_ISDIR(sb.st_mode)) &&
michael@0: 	    mkdirs(path, mode) < 0) {
michael@0: 	    return -1;
michael@0: 	}
michael@0: 	*cp = '/';
michael@0:     }
michael@0:     res = mkdir(path, mode);
michael@0:     if ((res != 0) && (errno == EEXIST))
michael@0: 	return 0;
michael@0:      else
michael@0: 	return res;
michael@0: }
michael@0: 
michael@0: static uid_t
michael@0: touid(char *owner)
michael@0: {
michael@0:     struct passwd *pw;
michael@0:     uid_t uid;
michael@0:     char *cp;
michael@0: 
michael@0:     pw = getpwnam(owner);
michael@0:     if (pw)
michael@0: 	return pw->pw_uid;
michael@0:     uid = strtol(owner, &cp, 0);
michael@0:     if (uid == 0 && cp == owner)
michael@0: 	fail("cannot find uid for %s", owner);
michael@0:     return uid;
michael@0: }
michael@0: 
michael@0: static gid_t
michael@0: togid(char *group)
michael@0: {
michael@0:     struct group *gr;
michael@0:     gid_t gid;
michael@0:     char *cp;
michael@0: 
michael@0:     gr = getgrnam(group);
michael@0:     if (gr)
michael@0: 	return gr->gr_gid;
michael@0:     gid = strtol(group, &cp, 0);
michael@0:     if (gid == 0 && cp == group)
michael@0: 	fail("cannot find gid for %s", group);
michael@0:     return gid;
michael@0: }
michael@0: 
michael@0: int
michael@0: main(int argc, char **argv)
michael@0: {
michael@0:     int onlydir, dodir, dolink, dorelsymlink, dotimes, opt, len, lplen, tdlen, bnlen, exists, fromfd, tofd, cc, wc;
michael@0:     mode_t mode = 0755;
michael@0:     char *linkprefix, *owner, *group, *cp, *cwd, *todir, *toname, *name, *base, *linkname, *bp, buf[BUFSIZ];
michael@0:     uid_t uid;
michael@0:     gid_t gid;
michael@0:     struct stat sb, tosb;
michael@0:     struct utimbuf utb;
michael@0: 
michael@0:     program = argv[0];
michael@0:     cwd = linkname = linkprefix = owner = group = 0;
michael@0:     onlydir = dodir = dolink = dorelsymlink = dotimes = lplen = 0;
michael@0: 
michael@0:     while ((opt = getopt(argc, argv, "C:DdlL:Rm:o:g:t")) != EOF) {
michael@0: 	switch (opt) {
michael@0: 	  case 'C':
michael@0: 	    cwd = optarg;
michael@0: 	    break;
michael@0: 	  case 'D':
michael@0: 	    onlydir = 1;
michael@0: 	    break;
michael@0: 	  case 'd':
michael@0: 	    dodir = 1;
michael@0: 	    break;
michael@0: 	  case 'l':
michael@0: 	    dolink = 1;
michael@0: 	    break;
michael@0: 	  case 'L':
michael@0: 	    linkprefix = optarg;
michael@0: 	    lplen = strlen(linkprefix);
michael@0: 	    dolink = 1;
michael@0: 	    break;
michael@0: 	  case 'R':
michael@0: 	    dolink = dorelsymlink = 1;
michael@0: 	    break;
michael@0: 	  case 'm':
michael@0: 	    mode = strtoul(optarg, &cp, 8);
michael@0: 	    if (mode == 0 && cp == optarg)
michael@0: 		usage();
michael@0: 	    break;
michael@0: 	  case 'o':
michael@0: 	    owner = optarg;
michael@0: 	    break;
michael@0: 	  case 'g':
michael@0: 	    group = optarg;
michael@0: 	    break;
michael@0: 	  case 't':
michael@0: 	    dotimes = 1;
michael@0: 	    break;
michael@0: 	  default:
michael@0: 	    usage();
michael@0: 	}
michael@0:     }
michael@0: 
michael@0:     argc -= optind;
michael@0:     argv += optind;
michael@0:     if (argc < 2 - onlydir)
michael@0: 	usage();
michael@0: 
michael@0:     todir = argv[argc-1];
michael@0:     if ((stat(todir, &sb) < 0 || !S_ISDIR(sb.st_mode)) &&
michael@0: 	mkdirs(todir, 0777) < 0) {
michael@0: 	fail("cannot make directory %s", todir);
michael@0:     }
michael@0:     if (onlydir)
michael@0: 	return 0;
michael@0: 
michael@0:     if (!cwd) {
michael@0: #ifdef GETCWD_CAN_MALLOC
michael@0: 	cwd = getcwd(0, PATH_MAX);
michael@0: #else
michael@0: 	cwd = malloc(PATH_MAX + 1);
michael@0: 	cwd = getcwd(cwd, PATH_MAX);
michael@0: #endif
michael@0:     }
michael@0:     xchdir(todir);
michael@0: #ifdef GETCWD_CAN_MALLOC
michael@0:     todir = getcwd(0, PATH_MAX);
michael@0: #else
michael@0:     todir = malloc(PATH_MAX + 1);
michael@0:     todir = getcwd(todir, PATH_MAX);
michael@0: #endif
michael@0:     xchdir(cwd);
michael@0:     tdlen = strlen(todir);
michael@0: 
michael@0:     uid = owner ? touid(owner) : -1;
michael@0:     gid = group ? togid(group) : -1;
michael@0: 
michael@0:     while (--argc > 0) {
michael@0: 	name = *argv++;
michael@0: 	len = strlen(name);
michael@0: 	base = xbasename(name);
michael@0: 	bnlen = strlen(base);
michael@0: 	toname = (char*)xmalloc(tdlen + 1 + bnlen + 1);
michael@0: 	sprintf(toname, "%s/%s", todir, base);
michael@0: 	exists = (lstat(toname, &tosb) == 0);
michael@0: 
michael@0: 	if (dodir) {
michael@0: 	    /* -d means create a directory, always */
michael@0: 	    if (exists && !S_ISDIR(tosb.st_mode)) {
michael@0: 		(void) unlink(toname);
michael@0: 		exists = 0;
michael@0: 	    }
michael@0: 	    if (!exists && mkdir(toname, mode) < 0)
michael@0: 		fail("cannot make directory %s", toname);
michael@0: 	    if ((owner || group) && chown(toname, uid, gid) < 0)
michael@0: 		fail("cannot change owner of %s", toname);
michael@0: 	} else if (dolink) {
michael@0: 	    if (*name == '/') {
michael@0: 		/* source is absolute pathname, link to it directly */
michael@0: 		linkname = 0;
michael@0: 	    } else {
michael@0: 		if (linkprefix) {
michael@0: 		    /* -L implies -l and prefixes names with a $cwd arg. */
michael@0: 		    len += lplen + 1;
michael@0: 		    linkname = (char*)xmalloc(len + 1);
michael@0: 		    sprintf(linkname, "%s/%s", linkprefix, name);
michael@0: 		} else if (dorelsymlink) {
michael@0: 		    /* Symlink the relative path from todir to source name. */
michael@0: 		    linkname = (char*)xmalloc(PATH_MAX);
michael@0: 
michael@0: 		    if (*todir == '/') {
michael@0: 			/* todir is absolute: skip over common prefix. */
michael@0: 			lplen = relatepaths(todir, cwd, linkname);
michael@0: 			strcpy(linkname + lplen, name);
michael@0: 		    } else {
michael@0: 			/* todir is named by a relative path: reverse it. */
michael@0: 			reversepath(todir, name, len, linkname);
michael@0: 			xchdir(cwd);
michael@0: 		    }
michael@0: 
michael@0: 		    len = strlen(linkname);
michael@0: 		}
michael@0: 		name = linkname;
michael@0: 	    }
michael@0: 
michael@0: 	    /* Check for a pre-existing symlink with identical content. */
michael@0: 	    if (exists &&
michael@0: 		(!S_ISLNK(tosb.st_mode) ||
michael@0: 		 readlink(toname, buf, sizeof buf) != len ||
michael@0: 		 strncmp(buf, name, len) != 0)) {
michael@0: 		(void) (S_ISDIR(tosb.st_mode) ? rmdir : unlink)(toname);
michael@0: 		exists = 0;
michael@0: 	    }
michael@0: 	    if (!exists && symlink(name, toname) < 0)
michael@0: 		fail("cannot make symbolic link %s", toname);
michael@0: #ifdef HAVE_LCHOWN
michael@0: 	    if ((owner || group) && lchown(toname, uid, gid) < 0)
michael@0: 		fail("cannot change owner of %s", toname);
michael@0: #endif
michael@0: 
michael@0: 	    if (linkname) {
michael@0: 		free(linkname);
michael@0: 		linkname = 0;
michael@0: 	    }
michael@0: 	} else {
michael@0: 	    /* Copy from name to toname, which might be the same file. */
michael@0: 	    fromfd = open(name, O_RDONLY);
michael@0: 	    if (fromfd < 0 || fstat(fromfd, &sb) < 0)
michael@0: 		fail("cannot access %s", name);
michael@0: 	    if (exists && (!S_ISREG(tosb.st_mode) || access(toname, W_OK) < 0))
michael@0: 		(void) (S_ISDIR(tosb.st_mode) ? rmdir : unlink)(toname);
michael@0: 	    tofd = open(toname, O_CREAT | O_WRONLY, 0666);
michael@0: 	    if (tofd < 0)
michael@0: 		fail("cannot create %s", toname);
michael@0: 
michael@0: 	    bp = buf;
michael@0: 	    while ((cc = read(fromfd, bp, sizeof buf)) > 0) {
michael@0: 		while ((wc = write(tofd, bp, cc)) > 0) {
michael@0: 		    if ((cc -= wc) == 0)
michael@0: 			break;
michael@0: 		    bp += wc;
michael@0: 		}
michael@0: 		if (wc < 0)
michael@0: 		    fail("cannot write to %s", toname);
michael@0: 	    }
michael@0: 	    if (cc < 0)
michael@0: 		fail("cannot read from %s", name);
michael@0: 
michael@0: 	    if (ftruncate(tofd, sb.st_size) < 0)
michael@0: 		fail("cannot truncate %s", toname);
michael@0: 	    if (dotimes) {
michael@0: 		utb.actime = sb.st_atime;
michael@0: 		utb.modtime = sb.st_mtime;
michael@0: 		if (utime(toname, &utb) < 0)
michael@0: 		    fail("cannot set times of %s", toname);
michael@0: 	    }
michael@0: #ifdef HAVE_FCHMOD
michael@0: 	    if (fchmod(tofd, mode) < 0)
michael@0: #else
michael@0: 	    if (chmod(toname, mode) < 0)
michael@0: #endif
michael@0: 		fail("cannot change mode of %s", toname);
michael@0: 	    if ((owner || group) && fchown(tofd, uid, gid) < 0)
michael@0: 		fail("cannot change owner of %s", toname);
michael@0: 
michael@0: 	    /* Must check for delayed (NFS) write errors on close. */
michael@0: 	    if (close(tofd) < 0)
michael@0: 		fail("cannot write to %s", toname);
michael@0: 	    close(fromfd);
michael@0: 	}
michael@0: 
michael@0: 	free(toname);
michael@0:     }
michael@0: 
michael@0:     free(cwd);
michael@0:     free(todir);
michael@0:     return 0;
michael@0: }
michael@0: 
michael@0: /*
michael@0: ** Pathname subroutines.
michael@0: **
michael@0: ** Brendan Eich, 8/29/95
michael@0: */
michael@0: 
michael@0: char *program;
michael@0: 
michael@0: void
michael@0: fail(char *format, ...)
michael@0: {
michael@0:     int error;
michael@0:     va_list ap;
michael@0: 
michael@0: #ifdef USE_REENTRANT_LIBC
michael@0:     R_STRERROR_INIT_R();
michael@0: #endif
michael@0: 
michael@0:     error = errno;
michael@0:     fprintf(stderr, "%s: ", program);
michael@0:     va_start(ap, format);
michael@0:     vfprintf(stderr, format, ap);
michael@0:     va_end(ap);
michael@0:     if (error)
michael@0: 
michael@0: #ifdef USE_REENTRANT_LIBC
michael@0:     R_STRERROR_R(errno);
michael@0: 	fprintf(stderr, ": %s", r_strerror_r);
michael@0: #else
michael@0: 	fprintf(stderr, ": %s", strerror(errno));
michael@0: #endif
michael@0: 
michael@0:     putc('\n', stderr);
michael@0:     exit(1);
michael@0: }
michael@0: 
michael@0: char *
michael@0: getcomponent(char *path, char *name)
michael@0: {
michael@0:     if (*path == '\0')
michael@0: 	return 0;
michael@0:     if (*path == '/') {
michael@0: 	*name++ = '/';
michael@0:     } else {
michael@0: 	do {
michael@0: 	    *name++ = *path++;
michael@0: 	} while (*path != '/' && *path != '\0');
michael@0:     }
michael@0:     *name = '\0';
michael@0:     while (*path == '/')
michael@0: 	path++;
michael@0:     return path;
michael@0: }
michael@0: 
michael@0: #ifdef UNIXWARE_READDIR_BUFFER_TOO_SMALL
michael@0: /* Sigh.  The static buffer in Unixware's readdir is too small. */
michael@0: struct dirent * readdir(DIR *d)
michael@0: {
michael@0:         static struct dirent *buf = NULL;
michael@0: #define MAX_PATH_LEN 1024
michael@0: 
michael@0: 
michael@0:         if(buf == NULL)
michael@0:                 buf = (struct dirent *) malloc(sizeof(struct dirent) + MAX_PATH_LEN)
michael@0: ;
michael@0:         return(readdir_r(d, buf));
michael@0: }
michael@0: #endif
michael@0: 
michael@0: char *
michael@0: ino2name(ino_t ino, char *dir)
michael@0: {
michael@0:     DIR *dp;
michael@0:     struct dirent *ep;
michael@0:     char *name;
michael@0: 
michael@0:     dp = opendir("..");
michael@0:     if (!dp)
michael@0: 	fail("cannot read parent directory");
michael@0:     for (;;) {
michael@0: 	if (!(ep = readdir(dp)))
michael@0: 	    fail("cannot find current directory");
michael@0: 	if (ep->d_ino == ino)
michael@0: 	    break;
michael@0:     }
michael@0:     name = xstrdup(ep->d_name);
michael@0:     closedir(dp);
michael@0:     return name;
michael@0: }
michael@0: 
michael@0: void *
michael@0: xmalloc(size_t size)
michael@0: {
michael@0:     void *p = malloc(size);
michael@0:     if (!p)
michael@0: 	fail("cannot allocate %u bytes", size);
michael@0:     return p;
michael@0: }
michael@0: 
michael@0: char *
michael@0: xstrdup(char *s)
michael@0: {
michael@0:     return strcpy((char*)xmalloc(strlen(s) + 1), s);
michael@0: }
michael@0: 
michael@0: char *
michael@0: xbasename(char *path)
michael@0: {
michael@0:     char *cp;
michael@0: 
michael@0:     while ((cp = strrchr(path, '/')) && cp[1] == '\0')
michael@0: 	*cp = '\0';
michael@0:     if (!cp) return path;
michael@0:     return cp + 1;
michael@0: }
michael@0: 
michael@0: void
michael@0: xchdir(char *dir)
michael@0: {
michael@0:     if (chdir(dir) < 0)
michael@0: 	fail("cannot change directory to %s", dir);
michael@0: }
michael@0: 
michael@0: int
michael@0: relatepaths(char *from, char *to, char *outpath)
michael@0: {
michael@0:     char *cp, *cp2;
michael@0:     int len;
michael@0:     char buf[NAME_MAX];
michael@0: 
michael@0:     assert(*from == '/' && *to == '/');
michael@0:     for (cp = to, cp2 = from; *cp == *cp2; cp++, cp2++)
michael@0: 	if (*cp == '\0')
michael@0: 	    break;
michael@0:     while (cp[-1] != '/')
michael@0: 	cp--, cp2--;
michael@0:     if (cp - 1 == to) {
michael@0: 	/* closest common ancestor is /, so use full pathname */
michael@0: 	len = strlen(strcpy(outpath, to));
michael@0: 	if (outpath[len] != '/') {
michael@0: 	    outpath[len++] = '/';
michael@0: 	    outpath[len] = '\0';
michael@0: 	}
michael@0:     } else {
michael@0: 	len = 0;
michael@0: 	while ((cp2 = getcomponent(cp2, buf)) != 0) {
michael@0: 	    strcpy(outpath + len, "../");
michael@0: 	    len += 3;
michael@0: 	}
michael@0: 	while ((cp = getcomponent(cp, buf)) != 0) {
michael@0: 	    sprintf(outpath + len, "%s/", buf);
michael@0: 	    len += strlen(outpath + len);
michael@0: 	}
michael@0:     }
michael@0:     return len;
michael@0: }
michael@0: 
michael@0: void
michael@0: reversepath(char *inpath, char *name, int len, char *outpath)
michael@0: {
michael@0:     char *cp, *cp2;
michael@0:     char buf[NAME_MAX];
michael@0:     struct stat sb;
michael@0: 
michael@0:     cp = strcpy(outpath + PATH_MAX - (len + 1), name);
michael@0:     cp2 = inpath;
michael@0:     while ((cp2 = getcomponent(cp2, buf)) != 0) {
michael@0: 	if (strcmp(buf, ".") == 0)
michael@0: 	    continue;
michael@0: 	if (strcmp(buf, "..") == 0) {
michael@0: 	    if (stat(".", &sb) < 0)
michael@0: 		fail("cannot stat current directory");
michael@0: 	    name = ino2name(sb.st_ino, "..");
michael@0: 	    len = strlen(name);
michael@0: 	    cp -= len + 1;
michael@0: 	    strcpy(cp, name);
michael@0: 	    cp[len] = '/';
michael@0: 	    free(name);
michael@0: 	    xchdir("..");
michael@0: 	} else {
michael@0: 	    cp -= 3;
michael@0: 	    strncpy(cp, "../", 3);
michael@0: 	    xchdir(buf);
michael@0: 	}
michael@0:     }
michael@0:     strcpy(outpath, cp);
michael@0: }