X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Ftempname.c;h=9b713cb04c94166c50556793fe18ff6f9c234d2d;hb=1276a2c5f24c0c932426aca9c899fa524d2443f2;hp=919badb3dc405c4921c10e9a6f87ce23cf15f372;hpb=8446c68075915b921cab48049c597ab1273046d8;p=gnulib.git
diff --git a/lib/tempname.c b/lib/tempname.c
index 919badb3d..9b713cb04 100644
--- a/lib/tempname.c
+++ b/lib/tempname.c
@@ -1,21 +1,19 @@
/* tempname.c - generate the name of a temporary file.
- Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- 2000, 2001, 2002, 2003, 2005, 2006 Free Software Foundation, Inc.
+ Copyright (C) 1991-2003, 2005-2007, 2009-2014 Free Software Foundation, Inc.
- This program is free software; you can redistribute it and/or modify
+ 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.
+ the Free Software Foundation; either version 3 of the License, 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see . */
/* Extracted from glibc sysdeps/posix/tempname.c. See also tmpdir.c. */
@@ -40,10 +38,13 @@
# define TMP_MAX 238328
#endif
#ifndef __GT_FILE
-# define __GT_FILE 0
-# define __GT_BIGFILE 1
-# define __GT_DIR 2
-# define __GT_NOCREATE 3
+# define __GT_FILE 0
+# define __GT_DIR 1
+# define __GT_NOCREATE 2
+#endif
+#if !_LIBC && (GT_FILE != __GT_FILE || GT_DIR != __GT_DIR \
+ || GT_NOCREATE != __GT_NOCREATE)
+# error report this to bug-gnulib@gnu.org
#endif
#include
@@ -51,11 +52,7 @@
#include
#include
-
-#if HAVE_SYS_TIME_H || _LIBC
-# include
-#endif
-
+#include
#include
#include
@@ -63,39 +60,32 @@
#if _LIBC
# define struct_stat64 struct stat64
-# define small_open __open
-# define large_open __open64
#else
# define struct_stat64 struct stat
-# define small_open open
-# define large_open open
# define __gen_tempname gen_tempname
# define __getpid getpid
# define __gettimeofday gettimeofday
# define __mkdir mkdir
+# define __open open
# define __lxstat64(version, file, buf) lstat (file, buf)
-# define __xstat64(version, file, buf) stat (file, buf)
-#endif
-
-#if ! (HAVE___SECURE_GETENV || _LIBC)
-# define __secure_getenv getenv
+# define __secure_getenv secure_getenv
#endif
#ifdef _LIBC
# include
# if HP_TIMING_AVAIL
# define RANDOM_BITS(Var) \
- if (__builtin_expect (value == UINT64_C (0), 0)) \
- { \
- /* If this is the first time this function is used initialize \
- the variable we accumulate the value in to some somewhat \
- random value. If we'd not do this programs at startup time \
- might have a reduced set of possible names, at least on slow \
- machines. */ \
- struct timeval tv; \
- __gettimeofday (&tv, NULL); \
- value = ((uint64_t) tv.tv_usec << 16) ^ tv.tv_sec; \
- } \
+ if (__builtin_expect (value == UINT64_C (0), 0)) \
+ { \
+ /* If this is the first time this function is used initialize \
+ the variable we accumulate the value in to some somewhat \
+ random value. If we'd not do this programs at startup time \
+ might have a reduced set of possible names, at least on slow \
+ machines. */ \
+ struct timeval tv; \
+ __gettimeofday (&tv, NULL); \
+ value = ((uint64_t) tv.tv_usec << 16) ^ tv.tv_sec; \
+ } \
HP_TIMING_NOW (Var)
# endif
#endif
@@ -126,7 +116,7 @@ direxists (const char *dir)
enough space in TMPL. */
int
__path_search (char *tmpl, size_t tmpl_len, const char *dir, const char *pfx,
- int try_tmpdir)
+ int try_tmpdir)
{
const char *d;
size_t dlen, plen;
@@ -140,35 +130,35 @@ __path_search (char *tmpl, size_t tmpl_len, const char *dir, const char *pfx,
{
plen = strlen (pfx);
if (plen > 5)
- plen = 5;
+ plen = 5;
}
if (try_tmpdir)
{
d = __secure_getenv ("TMPDIR");
if (d != NULL && direxists (d))
- dir = d;
+ dir = d;
else if (dir != NULL && direxists (dir))
- /* nothing */ ;
+ /* nothing */ ;
else
- dir = NULL;
+ dir = NULL;
}
if (dir == NULL)
{
if (direxists (P_tmpdir))
- dir = P_tmpdir;
+ dir = P_tmpdir;
else if (strcmp (P_tmpdir, "/tmp") != 0 && direxists ("/tmp"))
- dir = "/tmp";
+ dir = "/tmp";
else
- {
- __set_errno (ENOENT);
- return -1;
- }
+ {
+ __set_errno (ENOENT);
+ return -1;
+ }
}
dlen = strlen (dir);
while (dlen > 1 && dir[dlen - 1] == '/')
- dlen--; /* remove trailing slashes */
+ dlen--; /* remove trailing slashes */
/* check we have room for "${dir}/${pfx}XXXXXX\0" */
if (tmpl_len < dlen + 1 + plen + 6 + 1)
@@ -187,21 +177,20 @@ static const char letters[] =
"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
/* Generate a temporary file name based on TMPL. TMPL must match the
- rules for mk[s]temp (i.e. end in "XXXXXX"). The name constructed
- does not exist at the time of the call to __gen_tempname. TMPL is
- overwritten with the result.
+ rules for mk[s]temp (i.e. end in "XXXXXX", possibly with a suffix).
+ The name constructed does not exist at the time of the call to
+ __gen_tempname. TMPL is overwritten with the result.
KIND may be one of:
- __GT_NOCREATE: simply verify that the name does not exist
- at the time of the call.
- __GT_FILE: create the file using open(O_CREAT|O_EXCL)
- and return a read-write fd. The file is mode 0600.
- __GT_BIGFILE: same as __GT_FILE but use open64().
- __GT_DIR: create a directory, which will be mode 0700.
+ __GT_NOCREATE: simply verify that the name does not exist
+ at the time of the call.
+ __GT_FILE: create the file using open(O_CREAT|O_EXCL)
+ and return a read-write fd. The file is mode 0600.
+ __GT_DIR: create a directory, which will be mode 0700.
We use a clever algorithm to get hard-to-predict names. */
int
-__gen_tempname (char *tmpl, int kind)
+__gen_tempname (char *tmpl, int suffixlen, int flags, int kind)
{
int len;
char *XXXXXX;
@@ -215,7 +204,7 @@ __gen_tempname (char *tmpl, int kind)
/* A lower bound on the number of temporary files to attempt to
generate. The maximum total number of temporary file names that
can exist for a given template is 62**6. It should never be
- necessary to try all these combinations. Instead if a reasonable
+ necessary to try all of these combinations. Instead if a reasonable
number of names is tried (we define reasonable as 62**3) fail to
give the system administrator the chance to remove the problems. */
#define ATTEMPTS_MIN (62 * 62 * 62)
@@ -229,28 +218,24 @@ __gen_tempname (char *tmpl, int kind)
#endif
len = strlen (tmpl);
- if (len < 6 || strcmp (&tmpl[len - 6], "XXXXXX"))
+ if (len < 6 + suffixlen || memcmp (&tmpl[len - 6 - suffixlen], "XXXXXX", 6))
{
__set_errno (EINVAL);
return -1;
}
/* This is where the Xs start. */
- XXXXXX = &tmpl[len - 6];
+ XXXXXX = &tmpl[len - 6 - suffixlen];
/* Get some more or less random data. */
#ifdef RANDOM_BITS
RANDOM_BITS (random_time_bits);
#else
-# if HAVE_GETTIMEOFDAY || _LIBC
{
struct timeval tv;
__gettimeofday (&tv, NULL);
random_time_bits = ((uint64_t) tv.tv_usec << 16) ^ tv.tv_sec;
}
-# else
- random_time_bits = time (NULL);
-# endif
#endif
value += random_time_bits ^ __getpid ();
@@ -272,48 +257,47 @@ __gen_tempname (char *tmpl, int kind)
XXXXXX[5] = letters[v % 62];
switch (kind)
- {
- case __GT_FILE:
- fd = small_open (tmpl, O_RDWR | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR);
- break;
-
- case __GT_BIGFILE:
- fd = large_open (tmpl, O_RDWR | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR);
- break;
-
- case __GT_DIR:
- fd = __mkdir (tmpl, S_IRUSR | S_IWUSR | S_IXUSR);
- break;
-
- case __GT_NOCREATE:
- /* This case is backward from the other three. __gen_tempname
- succeeds if __xstat fails because the name does not exist.
- Note the continue to bypass the common logic at the bottom
- of the loop. */
- if (__lxstat64 (_STAT_VER, tmpl, &st) < 0)
- {
- if (errno == ENOENT)
- {
- __set_errno (save_errno);
- return 0;
- }
- else
- /* Give up now. */
- return -1;
- }
- continue;
-
- default:
- assert (! "invalid KIND in __gen_tempname");
- }
+ {
+ case __GT_FILE:
+ fd = __open (tmpl,
+ (flags & ~O_ACCMODE)
+ | O_RDWR | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR);
+ break;
+
+ case __GT_DIR:
+ fd = __mkdir (tmpl, S_IRUSR | S_IWUSR | S_IXUSR);
+ break;
+
+ case __GT_NOCREATE:
+ /* This case is backward from the other three. __gen_tempname
+ succeeds if __xstat fails because the name does not exist.
+ Note the continue to bypass the common logic at the bottom
+ of the loop. */
+ if (__lxstat64 (_STAT_VER, tmpl, &st) < 0)
+ {
+ if (errno == ENOENT)
+ {
+ __set_errno (save_errno);
+ return 0;
+ }
+ else
+ /* Give up now. */
+ return -1;
+ }
+ continue;
+
+ default:
+ assert (! "invalid KIND in __gen_tempname");
+ abort ();
+ }
if (fd >= 0)
- {
- __set_errno (save_errno);
- return fd;
- }
+ {
+ __set_errno (save_errno);
+ return fd;
+ }
else if (errno != EEXIST)
- return -1;
+ return -1;
}
/* We got out of the loop because we ran out of combinations to try. */