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* posix/execvp.c: Include alloca.h.

Browse Source 
(allocate_scripts_argv): Renamed to...
	(scripts_argv): ... this.  Don't allocate buffer here nor count
	arguments.
	(execvp): Use alloca if possible.
	* posix/Makefile: Add rules to build and run tst-vfork3 test.
	* posix/tst-vfork3.c: New test.

2007-01-03  Ulrich Drepper  <drepper@redhat.com>

	* string/Makefile (tst-strxfrm2-ENV): Define.
	* stdlib/Makefile (tst-strtod3-ENV): Define.
This commit is contained in:
Ulrich Drepper 2007-01-03 23:02:17 +00:00
parent 64a0aa0fac
commit df859a0c15
6 changed files with 317 additions and 47 deletions
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15
ChangeLog
View File

@ -1,3 +1,18 @@
2007-01-03 Jakub Jelinek <jakub@redhat.com>
* posix/execvp.c: Include alloca.h.
(allocate_scripts_argv): Renamed to...
(scripts_argv): ... this. Don't allocate buffer here nor count
arguments.
(execvp): Use alloca if possible.
* posix/Makefile: Add rules to build and run tst-vfork3 test.
* posix/tst-vfork3.c: New test.
2007-01-03 Ulrich Drepper <drepper@redhat.com>
* string/Makefile (tst-strxfrm2-ENV): Define.
* stdlib/Makefile (tst-strtod3-ENV): Define.
2007-01-02 Ulrich Drepper <drepper@redhat.com>
* posix/getconf.c: Update copyright year.

15
posix/Makefile
View File

@ -1,4 +1,4 @@
# Copyright (C) 1991-1999, 2000-2005, 2006 Free Software Foundation, Inc.
# Copyright (C) 1991-1999, 2000-2006, 2007 Free Software Foundation, Inc.
# This file is part of the GNU C Library.
# The GNU C Library is free software; you can redistribute it and/or
@ -83,7 +83,7 @@ tests := tstgetopt testfnm runtests runptests \
bug-regex21 bug-regex22 bug-regex23 bug-regex24 \
bug-regex25 bug-regex26 tst-nice tst-nanosleep tst-regex2 \
transbug tst-rxspencer tst-pcre tst-boost \
bug-ga1 tst-vfork1 tst-vfork2 tst-waitid \
bug-ga1 tst-vfork1 tst-vfork2 tst-vfork3 tst-waitid \
tst-getaddrinfo2 bug-glob1 bug-glob2 tst-sysconf \
tst-execvp1 tst-execvp2 tst-execlp1 tst-execlp2 \
tst-execv1 tst-execv2 tst-execl1 tst-execl2 \
@ -108,7 +108,8 @@ generated := $(addprefix wordexp-test-result, 1 2 3 4 5 6 7 8 9 10) \
bug-regex21-mem bug-regex21.mtrace \
tst-rxspencer-mem tst-rxspencer.mtrace tst-getconf.out \
tst-pcre-mem tst-pcre.mtrace tst-boost-mem tst-boost.mtrace \
bug-ga2.mtrace bug-ga2-mem bug-glob2.mtrace bug-glob2-mem
bug-ga2.mtrace bug-ga2-mem bug-glob2.mtrace bug-glob2-mem \
tst-vfork3-mem tst-vfork3.mtrace
include ../Rules
@ -174,6 +175,7 @@ tst-exec-ARGS = -- $(built-program-cmd)
tst-spawn-ARGS = -- $(built-program-cmd)
tst-dir-ARGS = `pwd` `cd $(common-objdir)/$(subdir); pwd` `cd $(common-objdir); pwd` $(objpfx)tst-dir
tst-chmod-ARGS = `pwd`
tst-vfork3-ARGS = --test-dir=$(objpfx)
tst-fnmatch-ENV = LOCPATH=$(common-objpfx)localedata
tst-regexloc-ENV = LOCPATH=$(common-objpfx)localedata
@ -218,7 +220,7 @@ ifeq (no,$(cross-compiling))
tests: $(objpfx)bug-regex2-mem $(objpfx)bug-regex14-mem \
$(objpfx)bug-regex21-mem $(objpfx)tst-rxspencer-mem \
$(objpfx)tst-pcre-mem $(objpfx)tst-boost-mem $(objpfx)tst-getconf.out \
$(objpfx)bug-glob2-mem
$(objpfx)bug-glob2-mem $(objpfx)tst-vfork3-mem
xtests: $(objpfx)bug-ga2-mem
endif
@ -245,6 +247,11 @@ bug-regex21-ENV = MALLOC_TRACE=$(objpfx)bug-regex21.mtrace
$(objpfx)bug-regex21-mem: $(objpfx)bug-regex21.out
$(common-objpfx)malloc/mtrace $(objpfx)bug-regex21.mtrace > $@
tst-vfork3-ENV = MALLOC_TRACE=$(objpfx)tst-vfork3.mtrace
$(objpfx)tst-vfork3-mem: $(objpfx)tst-vfork3.out
$(common-objpfx)malloc/mtrace $(objpfx)tst-vfork3.mtrace > $@
# tst-rxspencer.mtrace is generated only when run without --utf8
# option, since otherwise the file has almost 100M and takes very long
# time to process.

104
posix/execvp.c
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@ -1,4 +1,5 @@
/* Copyright (C) 1991,92,1995-99,2002,2004,2005 Free Software Foundation, Inc.
/* Copyright (C) 1991,92, 1995-99, 2002, 2004, 2005, 2007
Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -16,6 +17,7 @@
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <alloca.h>
#include <unistd.h>
#include <stdarg.h>
#include <stdbool.h>
@ -27,29 +29,18 @@
/* The file is accessible but it is not an executable file. Invoke
the shell to interpret it as a script. */
static char **
static void
internal_function
allocate_scripts_argv (const char *file, char *const argv[])
scripts_argv (const char *file, char *const argv[], int argc, char **new_argv)
{
/* Count the arguments. */
int argc = 0;
while (argv[argc++])
;
/* Construct an argument list for the shell. */
char **new_argv = (char **) malloc ((argc + 1) * sizeof (char *));
if (new_argv != NULL)
new_argv[0] = (char *) _PATH_BSHELL;
new_argv[1] = (char *) file;
while (argc > 1)
{
new_argv[0] = (char *) _PATH_BSHELL;
new_argv[1] = (char *) file;
while (argc > 1)
{
new_argv[argc] = argv[argc - 1];
--argc;
}
new_argv[argc] = argv[argc - 1];
--argc;
}
return new_argv;
}
@ -67,8 +58,6 @@ execvp (file, argv)
return -1;
}
char **script_argv = NULL;
if (strchr (file, '/') != NULL)
{
/* Don't search when it contains a slash. */
@ -76,46 +65,71 @@ execvp (file, argv)
if (errno == ENOEXEC)
{
script_argv = allocate_scripts_argv (file, argv);
/* Count the arguments. */
int argc = 0;
while (argv[argc++])
;
size_t len = (argc + 1) * sizeof (char *);
char **script_argv;
void *ptr = NULL;
if (__libc_use_alloca (len))
script_argv = alloca (len);
else
script_argv = ptr = malloc (len);
if (script_argv != NULL)
{
scripts_argv (file, argv, argc, script_argv);
__execve (script_argv[0], script_argv, __environ);
free (script_argv);
free (ptr);
}
}
}
else
{
size_t pathlen;
size_t alloclen = 0;
char *path = getenv ("PATH");
if (path == NULL)
{
pathlen = confstr (_CS_PATH, (char *) NULL, 0);
alloclen = pathlen + 1;
}
else
pathlen = strlen (path);
size_t len = strlen (file) + 1;
alloclen += pathlen + len + 1;
char *name;
char *path_malloc = NULL;
if (__libc_use_alloca (alloclen))
name = alloca (alloclen);
else
{
path_malloc = name = malloc (alloclen);
if (name == NULL)
return -1;
}
if (path == NULL)
{
/* There is no `PATH' in the environment.
The default search path is the current directory
followed by the path `confstr' returns for `_CS_PATH'. */
size_t len = confstr (_CS_PATH, (char *) NULL, 0);
path = (char *) malloc (1 + len);
if (path == NULL)
return -1;
path = name + pathlen + len + 1;
path[0] = ':';
(void) confstr (_CS_PATH, path + 1, len);
path_malloc = path;
(void) confstr (_CS_PATH, path + 1, pathlen);
}
size_t len = strlen (file) + 1;
size_t pathlen = strlen (path);
char *name = malloc (pathlen + len + 1);
if (name == NULL)
{
free (path_malloc);
return -1;
}
/* Copy the file name at the top. */
name = (char *) memcpy (name + pathlen + 1, file, len);
/* And add the slash. */
*--name = '/';
char **script_argv = NULL;
void *script_argv_malloc = NULL;
bool got_eacces = false;
char *p = path;
do
@ -139,7 +153,15 @@ execvp (file, argv)
{
if (script_argv == NULL)
{
script_argv = allocate_scripts_argv (startp, argv);
/* Count the arguments. */
int argc = 0;
while (argv[argc++])
;
size_t arglen = (argc + 1) * sizeof (char *);
if (__libc_use_alloca (alloclen + arglen))
script_argv = alloca (arglen);
else
script_argv = script_argv_malloc = malloc (arglen);
if (script_argv == NULL)
{
/* A possible EACCES error is not as important as
@ -147,6 +169,7 @@ execvp (file, argv)
got_eacces = false;
break;
}
scripts_argv (startp, argv, argc, script_argv);
}
__execve (script_argv[0], script_argv, __environ);
@ -184,11 +207,10 @@ execvp (file, argv)
/* We tried every element and none of them worked. */
if (got_eacces)
/* At least one failure was due to permissions, so report that
error. */
error. */
__set_errno (EACCES);
free (script_argv);
free (name - pathlen);
free (script_argv_malloc);
free (path_malloc);
}

224
posix/tst-vfork3.c Normal file
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@ -0,0 +1,224 @@
/* Test for vfork functions.
Copyright (C) 2007 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Jakub Jelinek <jakub@redhat.com>, 2007.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <errno.h>
#include <fcntl.h>
#include <mcheck.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/wait.h>
static int do_test (void);
static void do_prepare (void);
char *tmpdirname;
#define TEST_FUNCTION do_test ()
#define PREPARE(argc, argv) do_prepare ()
#include "../test-skeleton.c"
static int
do_test (void)
{
mtrace ();
const char *path = getenv ("PATH");
if (path == NULL)
path = "/bin";
char pathbuf[strlen (tmpdirname) + 1 + strlen (path) + 1];
strcpy (stpcpy (stpcpy (pathbuf, tmpdirname), ":"), path);
if (setenv ("PATH", pathbuf, 1) < 0)
{
puts ("setenv failed");
return 1;
}
size_t i;
char *argv[3] = { (char *) "script1.sh", (char *) "1", NULL };
for (i = 0; i < 5; i++)
{
pid_t pid = vfork ();
if (pid < 0)
{
printf ("vfork failed: %m\n");
return 1;
}
else if (pid == 0)
{
execvp ("script1.sh", argv);
_exit (errno);
}
int status;
if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
{
puts ("waitpid failed");
return 1;
}
else if (status != 0)
{
if (WIFEXITED (status))
printf ("script1.sh failed with status %d\n",
WEXITSTATUS (status));
else
printf ("script1.sh kill by signal %d\n",
WTERMSIG (status));
return 1;
}
}
argv[0] = (char *) "script2.sh";
argv[1] = (char *) "2";
for (i = 0; i < 5; i++)
{
pid_t pid = vfork ();
if (pid < 0)
{
printf ("vfork failed: %m\n");
return 1;
}
else if (pid == 0)
{
execvp ("script2.sh", argv);
_exit (errno);
}
int status;
if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
{
puts ("waitpid failed");
return 1;
}
else if (status != 0)
{
printf ("script2.sh failed with status %d\n", status);
return 1;
}
}
for (i = 0; i < 5; i++)
{
pid_t pid = vfork ();
if (pid < 0)
{
printf ("vfork failed: %m\n");
return 1;
}
else if (pid == 0)
{
execlp ("script2.sh", "script2.sh", "3", NULL);
_exit (errno);
}
int status;
if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
{
puts ("waitpid failed");
return 1;
}
else if (status != 0)
{
printf ("script2.sh failed with status %d\n", status);
return 1;
}
}
unsetenv ("PATH");
argv[0] = (char *) "echo";
argv[1] = (char *) "script 4";
for (i = 0; i < 5; i++)
{
pid_t pid = vfork ();
if (pid < 0)
{
printf ("vfork failed: %m\n");
return 1;
}
else if (pid == 0)
{
execvp ("echo", argv);
_exit (errno);
}
int status;
if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
{
puts ("waitpid failed");
return 1;
}
else if (status != 0)
{
printf ("echo failed with status %d\n", status);
return 1;
}
}
return 0;
}
static void
do_prepare (void)
{
size_t len = strlen (test_dir) + sizeof ("/tst-vfork3.XXXXXX");
tmpdirname = malloc (len);
char *script1 = malloc (len + sizeof "/script1.sh");
char *script2 = malloc (len + sizeof "/script2.sh");
if (tmpdirname == NULL || script1 == NULL || script2 == NULL)
{
puts ("out of memory");
exit (1);
}
strcpy (stpcpy (tmpdirname, test_dir), "/tst-vfork3.XXXXXX");
tmpdirname = mkdtemp (tmpdirname);
if (tmpdirname == NULL)
{
puts ("could not create temporary directory");
exit (1);
}
strcpy (stpcpy (script1, tmpdirname), "/script1.sh");
strcpy (stpcpy (script2, tmpdirname), "/script2.sh");
/* Need to make sure tmpdirname is at the end of the linked list. */
add_temp_file (script1);
add_temp_file (tmpdirname);
add_temp_file (script2);
const char content1[] = "#!/bin/sh\necho script $1\n";
int fd = open (script1, O_WRONLY | O_CREAT, 0700);
if (fd < 0
|| TEMP_FAILURE_RETRY (write (fd, content1, sizeof content1))
!= sizeof content1
|| fchmod (fd, S_IRUSR | S_IXUSR) < 0)
{
printf ("Could not write %s\n", script1);
exit (1);
}
close (fd);
const char content2[] = "echo script $1\n";
fd = open (script2, O_WRONLY | O_CREAT, 0700);
if (fd < 0
|| TEMP_FAILURE_RETRY (write (fd, content2, sizeof content2))
!= sizeof content2
|| fchmod (fd, S_IRUSR | S_IXUSR) < 0)
{
printf ("Could not write %s\n", script2);
exit (1);
}
close (fd);
}

3
stdlib/Makefile
View File

@ -1,4 +1,4 @@
# Copyright (C) 1991-2002,2003,2004,2005,2006 Free Software Foundation, Inc.
# Copyright (C) 1991-2006, 2007 Free Software Foundation, Inc.
# This file is part of the GNU C Library.
# The GNU C Library is free software; you can redistribute it and/or
@ -113,6 +113,7 @@ include ../Rules
test-canon-ARGS = --test-dir=${common-objpfx}stdlib
tst-strtod-ENV = LOCPATH=$(common-objpfx)localedata
tst-strtod3-ENV = LOCPATH=$(common-objpfx)localedata
testmb2-ENV = LOCPATH=$(common-objpfx)localedata
# Run a test on the header files we use.

3
string/Makefile
View File

@ -1,4 +1,4 @@
# Copyright (C) 1991-2002, 2005, 2006 Free Software Foundation, Inc.
# Copyright (C) 1991-2002, 2005, 2006, 2007 Free Software Foundation, Inc.
# This file is part of the GNU C Library.
# The GNU C Library is free software; you can redistribute it and/or
@ -64,6 +64,7 @@ tester-ENV = LANGUAGE=C
inl-tester-ENV = LANGUAGE=C
noinl-tester-ENV = LANGUAGE=C
tst-strxfrm-ENV = LOCPATH=$(common-objpfx)localedata
tst-strxfrm2-ENV = LOCPATH=$(common-objpfx)localedata
bug-strcoll1-ENV = LOCPATH=$(common-objpfx)localedata
CFLAGS-inl-tester.c = -fno-builtin
CFLAGS-noinl-tester.c = -fno-builtin