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