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Add Gnulib modules for 'posix_spawn' file operations.

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This is again from Gnulib v0.1-5703-g356a414e8c.

* m4/gnulib-cache.m4: Add 'posix_spawn_file_actions_addclose',
'posix_spawn_file_actions_adddup2',
'posix_spawn_file_actions_addopen', and
'posix_spawn_file_actions_init'.
This commit is contained in:
Ludovic Courtès 2023-01-19 00:32:12 +01:00
parent d98888290b
commit 3bb08542d2
7 changed files with 366 additions and 0 deletions
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44
lib/Makefile.am
View file

@ -111,6 +111,10 @@
# pipe2 \
# poll \
# posix_spawn \
# posix_spawn_file_actions_addclose \
# posix_spawn_file_actions_adddup2 \
# posix_spawn_file_actions_addopen \
# posix_spawn_file_actions_init \
# posix_spawnp \
# putenv \
# readlink \
@ -2068,6 +2072,46 @@ EXTRA_DIST += spawn_int.h
## end gnulib module posix_spawn-internal
## begin gnulib module posix_spawn_file_actions_addclose
if GL_COND_OBJ_SPAWN_FACTION_ADDCLOSE
libgnu_la_SOURCES += spawn_faction_addclose.c
endif
EXTRA_DIST += spawn_int.h
## end gnulib module posix_spawn_file_actions_addclose
## begin gnulib module posix_spawn_file_actions_adddup2
if GL_COND_OBJ_SPAWN_FACTION_ADDDUP2
libgnu_la_SOURCES += spawn_faction_adddup2.c
endif
EXTRA_DIST += spawn_int.h
## end gnulib module posix_spawn_file_actions_adddup2
## begin gnulib module posix_spawn_file_actions_addopen
if GL_COND_OBJ_SPAWN_FACTION_ADDOPEN
libgnu_la_SOURCES += spawn_faction_addopen.c
endif
EXTRA_DIST += spawn_int.h
## end gnulib module posix_spawn_file_actions_addopen
## begin gnulib module posix_spawn_file_actions_init
if GL_COND_OBJ_SPAWN_FACTION_INIT
libgnu_la_SOURCES += spawn_faction_init.c
endif
EXTRA_DIST += spawn_int.h
## end gnulib module posix_spawn_file_actions_init
## begin gnulib module posix_spawnp
if GL_COND_OBJ_SPAWNP

69
lib/spawn_faction_addclose.c Normal file
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@ -0,0 +1,69 @@
/* Copyright (C) 2000, 2009-2023 Free Software Foundation, Inc.
This file is part of the GNU C Library.
This file 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.
This file 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 this program. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
/* Specification. */
#include <spawn.h>
#include <errno.h>
#include <unistd.h>
#if !_LIBC
# define __sysconf(open_max) getdtablesize ()
#endif
#if REPLACE_POSIX_SPAWN
# include "spawn_int.h"
#endif
/* Add an action to FILE-ACTIONS which tells the implementation to call
'close' for the given file descriptor during the 'spawn' call. */
int
posix_spawn_file_actions_addclose (posix_spawn_file_actions_t *file_actions,
int fd)
#undef posix_spawn_file_actions_addclose
{
int maxfd = __sysconf (_SC_OPEN_MAX);
/* Test for the validity of the file descriptor. */
if (fd < 0 || fd >= maxfd)
return EBADF;
#if !REPLACE_POSIX_SPAWN
return posix_spawn_file_actions_addclose (file_actions, fd);
#else
/* Allocate more memory if needed. */
if (file_actions->_used == file_actions->_allocated
&& __posix_spawn_file_actions_realloc (file_actions) != 0)
/* This can only mean we ran out of memory. */
return ENOMEM;
{
struct __spawn_action *rec;
/* Add the new value. */
rec = &file_actions->_actions[file_actions->_used];
rec->tag = spawn_do_close;
rec->action.open_action.fd = fd;
/* Account for the new entry. */
++file_actions->_used;
return 0;
}
#endif
}

70
lib/spawn_faction_adddup2.c Normal file
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@ -0,0 +1,70 @@
/* Copyright (C) 2000, 2009-2023 Free Software Foundation, Inc.
This file is part of the GNU C Library.
This file 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.
This file 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 this program. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
/* Specification. */
#include <spawn.h>
#include <errno.h>
#include <unistd.h>
#if !_LIBC
# define __sysconf(open_max) getdtablesize ()
#endif
#if REPLACE_POSIX_SPAWN
# include "spawn_int.h"
#endif
/* Add an action to FILE-ACTIONS which tells the implementation to call
'dup2' for the given file descriptors during the 'spawn' call. */
int
posix_spawn_file_actions_adddup2 (posix_spawn_file_actions_t *file_actions,
int fd, int newfd)
#undef posix_spawn_file_actions_adddup2
{
int maxfd = __sysconf (_SC_OPEN_MAX);
/* Test for the validity of the file descriptor. */
if (fd < 0 || newfd < 0 || fd >= maxfd || newfd >= maxfd)
return EBADF;
#if !REPLACE_POSIX_SPAWN
return posix_spawn_file_actions_adddup2 (file_actions, fd, newfd);
#else
/* Allocate more memory if needed. */
if (file_actions->_used == file_actions->_allocated
&& __posix_spawn_file_actions_realloc (file_actions) != 0)
/* This can only mean we ran out of memory. */
return ENOMEM;
{
struct __spawn_action *rec;
/* Add the new value. */
rec = &file_actions->_actions[file_actions->_used];
rec->tag = spawn_do_dup2;
rec->action.dup2_action.fd = fd;
rec->action.dup2_action.newfd = newfd;
/* Account for the new entry. */
++file_actions->_used;
return 0;
}
#endif
}

86
lib/spawn_faction_addopen.c Normal file
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@ -0,0 +1,86 @@
/* Copyright (C) 2000, 2009-2023 Free Software Foundation, Inc.
This file is part of the GNU C Library.
This file 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.
This file 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 this program. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
/* Specification. */
#include <spawn.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#if !_LIBC
# define __sysconf(open_max) getdtablesize ()
#endif
#if REPLACE_POSIX_SPAWN
# include "spawn_int.h"
#endif
/* Add an action to FILE-ACTIONS which tells the implementation to call
'open' for the given file during the 'spawn' call. */
int
posix_spawn_file_actions_addopen (posix_spawn_file_actions_t *file_actions,
int fd, const char *path, int oflag,
mode_t mode)
#undef posix_spawn_file_actions_addopen
{
int maxfd = __sysconf (_SC_OPEN_MAX);
/* Test for the validity of the file descriptor. */
if (fd < 0 || fd >= maxfd)
return EBADF;
#if !REPLACE_POSIX_SPAWN
return posix_spawn_file_actions_addopen (file_actions, fd, path, oflag, mode);
#else
{
/* Copy PATH, because the caller may free it before calling posix_spawn()
or posix_spawnp(). */
char *path_copy = strdup (path);
if (path_copy == NULL)
return ENOMEM;
/* Allocate more memory if needed. */
if (file_actions->_used == file_actions->_allocated
&& __posix_spawn_file_actions_realloc (file_actions) != 0)
{
/* This can only mean we ran out of memory. */
free (path_copy);
return ENOMEM;
}
{
struct __spawn_action *rec;
/* Add the new value. */
rec = &file_actions->_actions[file_actions->_used];
rec->tag = spawn_do_open;
rec->action.open_action.fd = fd;
rec->action.open_action.path = path_copy;
rec->action.open_action.oflag = oflag;
rec->action.open_action.mode = mode;
/* Account for the new entry. */
++file_actions->_used;
return 0;
}
}
#endif
}

56
lib/spawn_faction_init.c Normal file
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@ -0,0 +1,56 @@
/* Copyright (C) 2000, 2009-2023 Free Software Foundation, Inc.
This file is part of the GNU C Library.
This file 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.
This file 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 this program. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
/* Specification. */
#include <spawn.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include "spawn_int.h"
/* Function used to increase the size of the allocated array. This
function is called from the 'add'-functions. */
int
__posix_spawn_file_actions_realloc (posix_spawn_file_actions_t *file_actions)
{
int newalloc = file_actions->_allocated + 8;
void *newmem = realloc (file_actions->_actions,
newalloc * sizeof (struct __spawn_action));
if (newmem == NULL)
/* Not enough memory. */
return ENOMEM;
file_actions->_actions = (struct __spawn_action *) newmem;
file_actions->_allocated = newalloc;
return 0;
}
/* Initialize data structure for file attribute for 'spawn' call. */
int
posix_spawn_file_actions_init (posix_spawn_file_actions_t *file_actions)
{
/* Simply clear all the elements. */
memset (file_actions, '\0', sizeof (*file_actions));
return 0;
}