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/* $TOG: lndir.c /main/17 1998/02/06 11:23:50 kaleb $ */
/* Create shadow link tree (after X11R4 script of the same name)
Mark Reinhold (mbr@lcs.mit.edu)/3 January 1990 */
/*
Copyright (c) 1990, 1998 The Open Group
All Rights Reserved.
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Except as contained in this notice, the name of The Open Group shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from The Open Group.
*/
/* $XFree86: xc/config/util/lndir.c,v 3.9 1999/10/19 16:32:37 tsi Exp $ */
/* From the original /bin/sh script:
Used to create a copy of the a directory tree that has links for all
non-directories (except, by default, those named RCS, SCCS or CVS.adm).
If you are building the distribution on more than one machine, you
should use this technique.
If your master sources are located in /usr/local/src/X and you would like
your link tree to be in /usr/local/src/new-X, do the following:
% mkdir /usr/local/src/new-X
% cd /usr/local/src/new-X
% lndir ../X
*/
#include <X11/Xos.h>
#include <X11/Xfuncproto.h>
#include <stdio.h>
#include <sys/stat.h>
#if !defined(MINIX) && !defined(Lynx)
#include <sys/param.h>
#endif
#include <errno.h>
#ifndef X_NOT_POSIX
#include <dirent.h>
#else
#ifdef SYSV
#include <dirent.h>
#else
#ifdef USG
#include <dirent.h>
#else
#include <sys/dir.h>
#ifndef dirent
#define dirent direct
#endif
#endif
#endif
#endif
#ifndef MAXPATHLEN
#define MAXPATHLEN 2048
#endif
#if NeedVarargsPrototypes
#include <stdarg.h>
#endif
#ifdef X_NOT_STDC_ENV
extern int errno;
#endif
int silent = 0; /* -silent */
int ignore_links = 0; /* -ignorelinks */
int with_revinfo = 0; /* -withrevinfo */
char *rcurdir;
char *curdir;
static void
quit (
#if NeedVarargsPrototypes
int code, char * fmt, ...)
#else
code, fmt, a1, a2, a3)
char *fmt;
#endif
{
#if NeedVarargsPrototypes
va_list args;
va_start(args, fmt);
vfprintf (stderr, fmt, args);
va_end(args);
#else
fprintf (stderr, fmt, a1, a2, a3);
#endif
putc ('\n', stderr);
exit (code);
}
static void
quiterr (int code, char *s)
{
perror (s);
exit (code);
}
static void
msg (
#if NeedVarargsPrototypes
char * fmt, ...)
#else
fmt, a1, a2, a3)
char *fmt;
#endif
{
#if NeedVarargsPrototypes
va_list args;
#endif
if (curdir) {
fprintf (stderr, "%s:\n", curdir);
curdir = 0;
}
#if NeedVarargsPrototypes
va_start(args, fmt);
vfprintf (stderr, fmt, args);
va_end(args);
#else
fprintf (stderr, fmt, a1, a2, a3);
#endif
putc ('\n', stderr);
}
static void
mperror (char *s)
{
if (curdir) {
fprintf (stderr, "%s:\n", curdir);
curdir = 0;
}
perror (s);
}
static int
equivalent(char *lname, char *rname)
{
char *s;
if (!strcmp(lname, rname))
return 1;
for (s = lname; *s && (s = strchr(s, '/')); s++) {
while (s[1] == '/')
strcpy(s+1, s+2);
}
return !strcmp(lname, rname);
}
/* Recursively create symbolic links from the current directory to the "from"
directory. Assumes that files described by fs and ts are directories. */
static int
dodir (char *fn, /* name of "from" directory, either absolute or
relative to cwd */
struct stat *fs,
struct stat *ts, /* stats for the "from" directory and cwd */
int rel) /* if true, prepend "../" to fn before using */
{
DIR *df;
struct dirent *dp;
char buf[MAXPATHLEN + 1], *p;
char symbuf[MAXPATHLEN + 1];
char basesym[MAXPATHLEN + 1];
struct stat sb, sc;
int n_dirs;
int symlen;
int basesymlen = -1;
char *ocurdir;
if ((fs->st_dev == ts->st_dev) && (fs->st_ino == ts->st_ino)) {
msg ("%s: From and to directories are identical!", fn);
return 1;
}
if (rel)
strcpy (buf, "../");
else
buf[0] = '\0';
strcat (buf, fn);
if (!(df = opendir (buf))) {
msg ("%s: Cannot opendir", buf);
return 1;
}
p = buf + strlen (buf);
*p++ = '/';
n_dirs = fs->st_nlink;
while ((dp = readdir (df))) {
if (dp->d_name[strlen(dp->d_name) - 1] == '~')
continue;
strcpy (p, dp->d_name);
if (n_dirs > 0) {
if (stat (buf, &sb) < 0) {
mperror (buf);
continue;
}
#ifdef S_ISDIR
if(S_ISDIR(sb.st_mode))
#else
if (sb.st_mode & S_IFDIR)
#endif
{
/* directory */
n_dirs--;
if (dp->d_name[0] == '.' &&
(dp->d_name[1] == '\0' || (dp->d_name[1] == '.' &&
dp->d_name[2] == '\0')))
continue;
if (!with_revinfo) {
if (!strcmp (dp->d_name, "RCS"))
continue;
if (!strcmp (dp->d_name, "SCCS"))
continue;
if (!strcmp (dp->d_name, "CVS"))
continue;
if (!strcmp (dp->d_name, "CVS.adm"))
continue;
}
ocurdir = rcurdir;
rcurdir = buf;
curdir = silent ? buf : (char *)0;
if (!silent)
printf ("%s:\n", buf);
if ((stat (dp->d_name, &sc) < 0) && (errno == ENOENT)) {
if (mkdir (dp->d_name, 0777) < 0 ||
stat (dp->d_name, &sc) < 0) {
mperror (dp->d_name);
curdir = rcurdir = ocurdir;
continue;
}
}
if (readlink (dp->d_name, symbuf, sizeof(symbuf) - 1) >= 0) {
msg ("%s: is a link instead of a directory", dp->d_name);
curdir = rcurdir = ocurdir;
continue;
}
if (chdir (dp->d_name) < 0) {
mperror (dp->d_name);
curdir = rcurdir = ocurdir;
continue;
}
dodir (buf, &sb, &sc, (buf[0] != '/'));
if (chdir ("..") < 0)
quiterr (1, "..");
curdir = rcurdir = ocurdir;
continue;
}
}
/* non-directory */
symlen = readlink (dp->d_name, symbuf, sizeof(symbuf) - 1);
if (symlen >= 0)
symbuf[symlen] = '\0';
/* The option to ignore links exists mostly because
checking for them slows us down by 10-20%.
But it is off by default because this really is a useful check. */
if (!ignore_links) {
/* see if the file in the base tree was a symlink */
basesymlen = readlink(buf, basesym, sizeof(basesym) - 1);
if (basesymlen >= 0)
basesym[basesymlen] = '\0';
}
if (symlen >= 0) {
/* Link exists in new tree. Print message if it doesn't match. */
if (!equivalent (basesymlen>=0 ? basesym : buf, symbuf))
msg ("%s: %s", dp->d_name, symbuf);
} else {
if (symlink (basesymlen>=0 ? basesym : buf, dp->d_name) < 0)
mperror (dp->d_name);
}
}
closedir (df);
return 0;
}
int
main (int ac, char *av[])
{
char *prog_name = av[0];
char *fn, *tn;
struct stat fs, ts;
while (++av, --ac) {
if (strcmp(*av, "-silent") == 0)
silent = 1;
else if (strcmp(*av, "-ignorelinks") == 0)
ignore_links = 1;
else if (strcmp(*av, "-withrevinfo") == 0)
with_revinfo = 1;
else if (strcmp(*av, "--") == 0) {
++av, --ac;
break;
}
else
break;
}
if (ac < 1 || ac > 2)
quit (1, "usage: %s [-silent] [-ignorelinks] fromdir [todir]",
prog_name);
fn = av[0];
if (ac == 2)
tn = av[1];
else
tn = ".";
/* to directory */
if (stat (tn, &ts) < 0)
quiterr (1, tn);
#ifdef S_ISDIR
if (!(S_ISDIR(ts.st_mode)))
#else
if (!(ts.st_mode & S_IFDIR))
#endif
quit (2, "%s: Not a directory", tn);
if (chdir (tn) < 0)
quiterr (1, tn);
/* from directory */
if (stat (fn, &fs) < 0)
quiterr (1, fn);
#ifdef S_ISDIR
if (!(S_ISDIR(fs.st_mode)))
#else
if (!(fs.st_mode & S_IFDIR))
#endif
quit (2, "%s: Not a directory", fn);
exit (dodir (fn, &fs, &ts, 0));
}
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