308 lines
7.8 KiB
C
308 lines
7.8 KiB
C
/* makepath.c -- Ensure that a directory path exists.
|
|
Copyright (C) 1990 Free Software Foundation, Inc.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2, or (at your option)
|
|
any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
|
|
|
|
/* Written by David MacKenzie <djm@gnu.ai.mit.edu> and
|
|
Jim Meyering <meyering@cs.utexas.edu>. */
|
|
|
|
/* This copy of makepath is almost like the fileutils one, but has
|
|
changes for HPUX CDF's. Maybe the 2 versions of makepath can
|
|
come together again in the future. */
|
|
|
|
#ifdef __GNUC__
|
|
#define alloca __builtin_alloca
|
|
#else
|
|
#ifdef HAVE_ALLOCA_H
|
|
#include <alloca.h>
|
|
#else
|
|
#ifdef _AIX
|
|
#pragma alloca
|
|
#else
|
|
char *alloca ();
|
|
#endif
|
|
#endif
|
|
#endif
|
|
|
|
#include <stdio.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#ifdef HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif
|
|
#if !defined(S_ISDIR) && defined(S_IFDIR)
|
|
#define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
|
|
#endif
|
|
|
|
#include <errno.h>
|
|
#ifdef STDC_HEADERS
|
|
#include <stdlib.h>
|
|
#else
|
|
extern int errno;
|
|
#endif
|
|
|
|
#if defined(STDC_HEADERS) || defined(HAVE_STRING_H)
|
|
#include <string.h>
|
|
#ifndef index
|
|
#define index strchr
|
|
#endif
|
|
#else
|
|
#include <strings.h>
|
|
#endif
|
|
|
|
#if defined(__MSDOS__) && !defined(__GNUC__)
|
|
typedef int uid_t;
|
|
typedef int gid_t;
|
|
#endif
|
|
|
|
void error ();
|
|
|
|
/* Ensure that the directory ARGPATH exists.
|
|
Remove any trailing slashes from ARGPATH before calling this function.
|
|
|
|
Make any leading directories that don't already exist, with
|
|
permissions PARENT_MODE.
|
|
If the last element of ARGPATH does not exist, create it as
|
|
a new directory with permissions MODE.
|
|
If OWNER and GROUP are non-negative, make them the UID and GID of
|
|
created directories.
|
|
If VERBOSE_FMT_STRING is nonzero, use it as a printf format
|
|
string for printing a message after successfully making a directory,
|
|
with the name of the directory that was just made as an argument.
|
|
|
|
Return 0 if ARGPATH exists as a directory with the proper
|
|
ownership and permissions when done, otherwise 1. */
|
|
|
|
int
|
|
make_path (argpath, mode, parent_mode, owner, group, verbose_fmt_string)
|
|
char *argpath;
|
|
int mode;
|
|
int parent_mode;
|
|
uid_t owner;
|
|
gid_t group;
|
|
char *verbose_fmt_string;
|
|
{
|
|
char *dirpath; /* A copy we can scribble NULs on. */
|
|
struct stat stats;
|
|
int retval = 0;
|
|
int oldmask = umask (0);
|
|
dirpath = alloca (strlen (argpath) + 1);
|
|
strcpy (dirpath, argpath);
|
|
|
|
if (stat (dirpath, &stats))
|
|
{
|
|
char *slash;
|
|
int tmp_mode; /* Initial perms for leading dirs. */
|
|
int re_protect; /* Should leading dirs be unwritable? */
|
|
struct ptr_list
|
|
{
|
|
char *dirname_end;
|
|
struct ptr_list *next;
|
|
};
|
|
struct ptr_list *p, *leading_dirs = NULL;
|
|
|
|
/* If leading directories shouldn't be writable or executable,
|
|
or should have set[ug]id or sticky bits set and we are setting
|
|
their owners, we need to fix their permissions after making them. */
|
|
if (((parent_mode & 0300) != 0300)
|
|
|| (owner != (uid_t) -1 && group != (gid_t) -1
|
|
&& (parent_mode & 07000) != 0))
|
|
{
|
|
tmp_mode = 0700;
|
|
re_protect = 1;
|
|
}
|
|
else
|
|
{
|
|
tmp_mode = parent_mode;
|
|
re_protect = 0;
|
|
}
|
|
|
|
slash = dirpath;
|
|
while (*slash == '/')
|
|
slash++;
|
|
while ((slash = index (slash, '/')))
|
|
{
|
|
#ifdef HPUX_CDF
|
|
int iscdf;
|
|
iscdf = 0;
|
|
#endif
|
|
*slash = '\0';
|
|
if (stat (dirpath, &stats))
|
|
{
|
|
#ifdef HPUX_CDF
|
|
/* If this component of the pathname ends in `+' and is
|
|
followed by 2 `/'s, then this is a CDF. We remove the
|
|
`+' from the name and create the directory. Later
|
|
we will "hide" the directory. */
|
|
if ( (*(slash +1) == '/') && (*(slash -1) == '+') )
|
|
{
|
|
iscdf = 1;
|
|
*(slash -1) = '\0';
|
|
}
|
|
#endif
|
|
if (mkdir (dirpath, tmp_mode))
|
|
{
|
|
error (0, errno, "cannot make directory `%s'", dirpath);
|
|
umask (oldmask);
|
|
return 1;
|
|
}
|
|
else
|
|
{
|
|
if (verbose_fmt_string != NULL)
|
|
error (0, 0, verbose_fmt_string, dirpath);
|
|
|
|
if (owner != (uid_t) -1 && group != (gid_t) -1
|
|
&& chown (dirpath, owner, group)
|
|
#ifdef AFS
|
|
&& errno != EPERM
|
|
#endif
|
|
)
|
|
{
|
|
error (0, errno, "%s", dirpath);
|
|
retval = 1;
|
|
}
|
|
if (re_protect)
|
|
{
|
|
struct ptr_list *new = (struct ptr_list *)
|
|
alloca (sizeof (struct ptr_list));
|
|
new->dirname_end = slash;
|
|
new->next = leading_dirs;
|
|
leading_dirs = new;
|
|
}
|
|
#ifdef HPUX_CDF
|
|
if (iscdf)
|
|
{
|
|
/* If this is a CDF, "hide" the directory by setting
|
|
its hidden/setuid bit. Also add the `+' back to
|
|
its name (since once it's "hidden" we must refer
|
|
to as `name+' instead of `name'). */
|
|
chmod (dirpath, 04700);
|
|
*(slash - 1) = '+';
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
else if (!S_ISDIR (stats.st_mode))
|
|
{
|
|
error (0, 0, "`%s' exists but is not a directory", dirpath);
|
|
umask (oldmask);
|
|
return 1;
|
|
}
|
|
|
|
*slash++ = '/';
|
|
|
|
/* Avoid unnecessary calls to `stat' when given
|
|
pathnames containing multiple adjacent slashes. */
|
|
while (*slash == '/')
|
|
slash++;
|
|
}
|
|
|
|
/* We're done making leading directories.
|
|
Make the final component of the path. */
|
|
|
|
if (mkdir (dirpath, mode))
|
|
{
|
|
/* In some cases, if the final component in dirpath was `.' then we
|
|
just got an EEXIST error from that last mkdir(). If that's
|
|
the case, ignore it. */
|
|
if ( (errno != EEXIST) ||
|
|
(stat (dirpath, &stats) != 0) ||
|
|
(!S_ISDIR (stats.st_mode) ) )
|
|
{
|
|
error (0, errno, "cannot make directory `%s'", dirpath);
|
|
umask (oldmask);
|
|
return 1;
|
|
}
|
|
}
|
|
if (verbose_fmt_string != NULL)
|
|
error (0, 0, verbose_fmt_string, dirpath);
|
|
|
|
if (owner != (uid_t) -1 && group != (gid_t) -1)
|
|
{
|
|
if (chown (dirpath, owner, group)
|
|
#ifdef AFS
|
|
&& errno != EPERM
|
|
#endif
|
|
)
|
|
{
|
|
error (0, errno, "%s", dirpath);
|
|
retval = 1;
|
|
}
|
|
}
|
|
/* chown may have turned off some permission bits we wanted. */
|
|
if ((mode & 07000) != 0 && chmod (dirpath, mode))
|
|
{
|
|
error (0, errno, "%s", dirpath);
|
|
retval = 1;
|
|
}
|
|
|
|
/* If the mode for leading directories didn't include owner "wx"
|
|
privileges, we have to reset their protections to the correct
|
|
value. */
|
|
for (p = leading_dirs; p != NULL; p = p->next)
|
|
{
|
|
*(p->dirname_end) = '\0';
|
|
#if 0
|
|
/* cpio always calls make_path with parent mode 0700, so
|
|
we don't have to do this. If we ever do have to do this,
|
|
we have to stat the directory first to get the setuid
|
|
bit so we don't break HP CDF's. */
|
|
if (chmod (dirpath, parent_mode))
|
|
{
|
|
error (0, errno, "%s", dirpath);
|
|
retval = 1;
|
|
}
|
|
#endif
|
|
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* We get here if the entire path already exists. */
|
|
|
|
if (!S_ISDIR (stats.st_mode))
|
|
{
|
|
error (0, 0, "`%s' exists but is not a directory", dirpath);
|
|
umask (oldmask);
|
|
return 1;
|
|
}
|
|
|
|
/* chown must precede chmod because on some systems,
|
|
chown clears the set[ug]id bits for non-superusers,
|
|
resulting in incorrect permissions.
|
|
On System V, users can give away files with chown and then not
|
|
be able to chmod them. So don't give files away. */
|
|
|
|
if (owner != (uid_t) -1 && group != (gid_t) -1
|
|
&& chown (dirpath, owner, group)
|
|
#ifdef AFS
|
|
&& errno != EPERM
|
|
#endif
|
|
)
|
|
{
|
|
error (0, errno, "%s", dirpath);
|
|
retval = 1;
|
|
}
|
|
if (chmod (dirpath, mode))
|
|
{
|
|
error (0, errno, "%s", dirpath);
|
|
retval = 1;
|
|
}
|
|
}
|
|
|
|
umask (oldmask);
|
|
return retval;
|
|
}
|