diff options
Diffstat (limited to 'm4/posix_spawn.m4')
| -rw-r--r-- | m4/posix_spawn.m4 | 527 |
1 files changed, 0 insertions, 527 deletions
diff --git a/m4/posix_spawn.m4 b/m4/posix_spawn.m4 deleted file mode 100644 index 69eaf633..00000000 --- a/m4/posix_spawn.m4 +++ /dev/null @@ -1,527 +0,0 @@ -# posix_spawn.m4 serial 11 -dnl Copyright (C) 2008-2013 Free Software Foundation, Inc. -dnl This file is free software; the Free Software Foundation -dnl gives unlimited permission to copy and/or distribute it, -dnl with or without modifications, as long as this notice is preserved. - -dnl Tests whether the entire posix_spawn facility is available. -AC_DEFUN([gl_POSIX_SPAWN], -[ - AC_REQUIRE([gl_POSIX_SPAWN_BODY]) -]) - -AC_DEFUN([gl_POSIX_SPAWN_BODY], -[ - AC_REQUIRE([gl_SPAWN_H_DEFAULTS]) - AC_REQUIRE([gl_HAVE_POSIX_SPAWN]) - dnl Assume that when the main function exists, all the others, - dnl except posix_spawnattr_{get,set}sched*, are available as well. - dnl AC_CHECK_FUNCS_ONCE([posix_spawnp]) - dnl AC_CHECK_FUNCS_ONCE([posix_spawn_file_actions_init]) - dnl AC_CHECK_FUNCS_ONCE([posix_spawn_file_actions_addclose]) - dnl AC_CHECK_FUNCS_ONCE([posix_spawn_file_actions_adddup2]) - dnl AC_CHECK_FUNCS_ONCE([posix_spawn_file_actions_addopen]) - dnl AC_CHECK_FUNCS_ONCE([posix_spawn_file_actions_destroy]) - dnl AC_CHECK_FUNCS_ONCE([posix_spawnattr_init]) - dnl AC_CHECK_FUNCS_ONCE([posix_spawnattr_getflags]) - dnl AC_CHECK_FUNCS_ONCE([posix_spawnattr_setflags]) - dnl AC_CHECK_FUNCS_ONCE([posix_spawnattr_getpgroup]) - dnl AC_CHECK_FUNCS_ONCE([posix_spawnattr_setpgroup]) - dnl AC_CHECK_FUNCS_ONCE([posix_spawnattr_getsigdefault]) - dnl AC_CHECK_FUNCS_ONCE([posix_spawnattr_setsigdefault]) - dnl AC_CHECK_FUNCS_ONCE([posix_spawnattr_getsigmask]) - dnl AC_CHECK_FUNCS_ONCE([posix_spawnattr_setsigmask]) - dnl AC_CHECK_FUNCS_ONCE([posix_spawnattr_destroy]) - if test $ac_cv_func_posix_spawn = yes; then - gl_POSIX_SPAWN_WORKS - case "$gl_cv_func_posix_spawn_works" in - *yes) - AC_DEFINE([HAVE_WORKING_POSIX_SPAWN], [1], - [Define if you have the posix_spawn and posix_spawnp functions and - they work.]) - dnl Assume that these functions are available if POSIX_SPAWN_SETSCHEDULER - dnl evaluates to nonzero. - dnl AC_CHECK_FUNCS_ONCE([posix_spawnattr_getschedpolicy]) - dnl AC_CHECK_FUNCS_ONCE([posix_spawnattr_setschedpolicy]) - AC_CACHE_CHECK([whether posix_spawnattr_setschedpolicy is supported], - [gl_cv_func_spawnattr_setschedpolicy], - [AC_EGREP_CPP([POSIX scheduling supported], [ -#include <spawn.h> -#if POSIX_SPAWN_SETSCHEDULER - POSIX scheduling supported -#endif -], - [gl_cv_func_spawnattr_setschedpolicy=yes], - [gl_cv_func_spawnattr_setschedpolicy=no]) - ]) - dnl Assume that these functions are available if POSIX_SPAWN_SETSCHEDPARAM - dnl evaluates to nonzero. - dnl AC_CHECK_FUNCS_ONCE([posix_spawnattr_getschedparam]) - dnl AC_CHECK_FUNCS_ONCE([posix_spawnattr_setschedparam]) - AC_CACHE_CHECK([whether posix_spawnattr_setschedparam is supported], - [gl_cv_func_spawnattr_setschedparam], - [AC_EGREP_CPP([POSIX scheduling supported], [ -#include <spawn.h> -#if POSIX_SPAWN_SETSCHEDPARAM - POSIX scheduling supported -#endif -], - [gl_cv_func_spawnattr_setschedparam=yes], - [gl_cv_func_spawnattr_setschedparam=no]) - ]) - ;; - *) REPLACE_POSIX_SPAWN=1 ;; - esac - fi -]) - -dnl Test whether posix_spawn actually works. -dnl posix_spawn on AIX 5.3..6.1 has two bugs: -dnl 1) When it fails to execute the program, the child process exits with -dnl exit() rather than _exit(), which causes the stdio buffers to be -dnl flushed. Reported by Rainer Tammer. -dnl 2) The posix_spawn_file_actions_addopen function does not support file -dnl names that contain a '*'. -dnl posix_spawn on AIX 5.3..6.1 has also a third bug: It does not work -dnl when POSIX threads are used. But we don't test against this bug here. -AC_DEFUN([gl_POSIX_SPAWN_WORKS], -[ - AC_REQUIRE([AC_PROG_CC]) - AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles - AC_CACHE_CHECK([whether posix_spawn works], [gl_cv_func_posix_spawn_works], - [if test $cross_compiling = no; then - AC_LINK_IFELSE([AC_LANG_SOURCE([[ -#include <errno.h> -#include <fcntl.h> -#include <signal.h> -#include <spawn.h> -#include <stdbool.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> -#include <sys/types.h> -#include <sys/wait.h> - -extern char **environ; - -#ifndef STDIN_FILENO -# define STDIN_FILENO 0 -#endif -#ifndef STDOUT_FILENO -# define STDOUT_FILENO 1 -#endif -#ifndef STDERR_FILENO -# define STDERR_FILENO 2 -#endif - -#ifndef WTERMSIG -# define WTERMSIG(x) ((x) & 0x7f) -#endif -#ifndef WIFEXITED -# define WIFEXITED(x) (WTERMSIG (x) == 0) -#endif -#ifndef WEXITSTATUS -# define WEXITSTATUS(x) (((x) >> 8) & 0xff) -#endif - -#define CHILD_PROGRAM_FILENAME "/non/exist/ent" - -static int -fd_safer (int fd) -{ - if (0 <= fd && fd <= 2) - { - int f = fd_safer (dup (fd)); - int e = errno; - close (fd); - errno = e; - fd = f; - } - - return fd; -} - -int -main () -{ - char *argv[2] = { CHILD_PROGRAM_FILENAME, NULL }; - int ofd[2]; - sigset_t blocked_signals; - sigset_t fatal_signal_set; - posix_spawn_file_actions_t actions; - bool actions_allocated; - posix_spawnattr_t attrs; - bool attrs_allocated; - int err; - pid_t child; - int status; - int exitstatus; - - setvbuf (stdout, NULL, _IOFBF, 0); - puts ("This should be seen only once."); - if (pipe (ofd) < 0 || (ofd[1] = fd_safer (ofd[1])) < 0) - { - perror ("cannot create pipe"); - exit (1); - } - sigprocmask (SIG_SETMASK, NULL, &blocked_signals); - sigemptyset (&fatal_signal_set); - sigaddset (&fatal_signal_set, SIGINT); - sigaddset (&fatal_signal_set, SIGTERM); - sigaddset (&fatal_signal_set, SIGHUP); - sigaddset (&fatal_signal_set, SIGPIPE); - sigprocmask (SIG_BLOCK, &fatal_signal_set, NULL); - actions_allocated = false; - attrs_allocated = false; - if ((err = posix_spawn_file_actions_init (&actions)) != 0 - || (actions_allocated = true, - (err = posix_spawn_file_actions_adddup2 (&actions, ofd[0], STDIN_FILENO)) != 0 - || (err = posix_spawn_file_actions_addclose (&actions, ofd[0])) != 0 - || (err = posix_spawn_file_actions_addclose (&actions, ofd[1])) != 0 - || (err = posix_spawnattr_init (&attrs)) != 0 - || (attrs_allocated = true, - (err = posix_spawnattr_setsigmask (&attrs, &blocked_signals)) != 0 - || (err = posix_spawnattr_setflags (&attrs, POSIX_SPAWN_SETSIGMASK)) != 0) - || (err = posix_spawnp (&child, CHILD_PROGRAM_FILENAME, &actions, &attrs, argv, environ)) != 0)) - { - if (actions_allocated) - posix_spawn_file_actions_destroy (&actions); - if (attrs_allocated) - posix_spawnattr_destroy (&attrs); - sigprocmask (SIG_UNBLOCK, &fatal_signal_set, NULL); - if (err == ENOENT) - return 0; - else - { - errno = err; - perror ("subprocess failed"); - exit (1); - } - } - posix_spawn_file_actions_destroy (&actions); - posix_spawnattr_destroy (&attrs); - sigprocmask (SIG_UNBLOCK, &fatal_signal_set, NULL); - close (ofd[0]); - close (ofd[1]); - status = 0; - while (waitpid (child, &status, 0) != child) - ; - if (!WIFEXITED (status)) - { - fprintf (stderr, "subprocess terminated with unexpected wait status %d\n", status); - exit (1); - } - exitstatus = WEXITSTATUS (status); - if (exitstatus != 127) - { - fprintf (stderr, "subprocess terminated with unexpected exit status %d\n", exitstatus); - exit (1); - } - return 0; -} -]])], - [if test -s conftest$ac_exeext \ - && ./conftest$ac_exeext > conftest.out \ - && echo 'This should be seen only once.' > conftest.ok \ - && cmp conftest.out conftest.ok > /dev/null; then - gl_cv_func_posix_spawn_works=yes - else - gl_cv_func_posix_spawn_works=no - fi], - [gl_cv_func_posix_spawn_works=no]) - if test $gl_cv_func_posix_spawn_works = yes; then - AC_RUN_IFELSE([AC_LANG_SOURCE([[ -/* Test whether posix_spawn_file_actions_addopen supports filename arguments - that contain special characters such as '*'. */ - -#include <errno.h> -#include <fcntl.h> -#include <signal.h> -#include <spawn.h> -#include <stdbool.h> -#include <stdio.h> -#include <string.h> -#include <unistd.h> -#include <sys/types.h> -#include <sys/wait.h> - -extern char **environ; - -#ifndef STDIN_FILENO -# define STDIN_FILENO 0 -#endif -#ifndef STDOUT_FILENO -# define STDOUT_FILENO 1 -#endif -#ifndef STDERR_FILENO -# define STDERR_FILENO 2 -#endif - -#ifndef WTERMSIG -# define WTERMSIG(x) ((x) & 0x7f) -#endif -#ifndef WIFEXITED -# define WIFEXITED(x) (WTERMSIG (x) == 0) -#endif -#ifndef WEXITSTATUS -# define WEXITSTATUS(x) (((x) >> 8) & 0xff) -#endif - -#define CHILD_PROGRAM_FILENAME "conftest" -#define DATA_FILENAME "conftest%=*#?" - -static int -parent_main (void) -{ - FILE *fp; - char *argv[3] = { CHILD_PROGRAM_FILENAME, "-child", NULL }; - posix_spawn_file_actions_t actions; - bool actions_allocated; - int err; - pid_t child; - int status; - int exitstatus; - - /* Create a data file with specific contents. */ - fp = fopen (DATA_FILENAME, "wb"); - if (fp == NULL) - { - perror ("cannot create data file"); - return 1; - } - fwrite ("Halle Potta", 1, 11, fp); - if (fflush (fp) || fclose (fp)) - { - perror ("cannot prepare data file"); - return 2; - } - - /* Avoid reading from our stdin, as it could block. */ - freopen ("/dev/null", "rb", stdin); - - /* Test whether posix_spawn_file_actions_addopen with this file name - actually works, but spawning a child that reads from this file. */ - actions_allocated = false; - if ((err = posix_spawn_file_actions_init (&actions)) != 0 - || (actions_allocated = true, - (err = posix_spawn_file_actions_addopen (&actions, STDIN_FILENO, DATA_FILENAME, O_RDONLY, 0600)) != 0 - || (err = posix_spawn (&child, CHILD_PROGRAM_FILENAME, &actions, NULL, argv, environ)) != 0)) - { - if (actions_allocated) - posix_spawn_file_actions_destroy (&actions); - errno = err; - perror ("subprocess failed"); - return 3; - } - posix_spawn_file_actions_destroy (&actions); - status = 0; - while (waitpid (child, &status, 0) != child) - ; - if (!WIFEXITED (status)) - { - fprintf (stderr, "subprocess terminated with unexpected wait status %d\n", status); - return 4; - } - exitstatus = WEXITSTATUS (status); - if (exitstatus != 0) - { - fprintf (stderr, "subprocess terminated with unexpected exit status %d\n", exitstatus); - return 5; - } - return 0; -} - -static int -child_main (void) -{ - char buf[1024]; - - /* See if reading from STDIN_FILENO yields the expected contents. */ - if (fread (buf, 1, sizeof (buf), stdin) == 11 - && memcmp (buf, "Halle Potta", 11) == 0) - return 0; - else - return 8; -} - -static void -cleanup_then_die (int sig) -{ - /* Clean up data file. */ - unlink (DATA_FILENAME); - - /* Re-raise the signal and die from it. */ - signal (sig, SIG_DFL); - raise (sig); -} - -int -main (int argc, char *argv[]) -{ - int exitstatus; - - if (!(argc > 1 && strcmp (argv[1], "-child") == 0)) - { - /* This is the parent process. */ - signal (SIGINT, cleanup_then_die); - signal (SIGTERM, cleanup_then_die); - #ifdef SIGHUP - signal (SIGHUP, cleanup_then_die); - #endif - - exitstatus = parent_main (); - } - else - { - /* This is the child process. */ - - exitstatus = child_main (); - } - unlink (DATA_FILENAME); - return exitstatus; -} -]])], - [], - [gl_cv_func_posix_spawn_works=no]) - fi - else - case "$host_os" in - aix*) gl_cv_func_posix_spawn_works="guessing no";; - *) gl_cv_func_posix_spawn_works="guessing yes";; - esac - fi - ]) -]) - -# Prerequisites of lib/spawni.c. -AC_DEFUN([gl_PREREQ_POSIX_SPAWN_INTERNAL], -[ - AC_CHECK_HEADERS([paths.h]) - AC_CHECK_FUNCS([confstr sched_setparam sched_setscheduler setegid seteuid vfork]) -]) - -AC_DEFUN([gl_FUNC_POSIX_SPAWN_FILE_ACTIONS_ADDCLOSE], -[ - AC_REQUIRE([gl_SPAWN_H_DEFAULTS]) - AC_REQUIRE([AC_PROG_CC]) - AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles - gl_POSIX_SPAWN - if test $REPLACE_POSIX_SPAWN = 1; then - REPLACE_POSIX_SPAWN_FILE_ACTIONS_ADDCLOSE=1 - else - dnl On Solaris 11 2011-11, posix_spawn_file_actions_addclose succeeds even - dnl if the fd argument is out of range. - AC_CACHE_CHECK([whether posix_spawn_file_actions_addclose works], - [gl_cv_func_posix_spawn_file_actions_addclose_works], - [AC_RUN_IFELSE( - [AC_LANG_SOURCE([[ -#include <spawn.h> -int main () -{ - posix_spawn_file_actions_t actions; - if (posix_spawn_file_actions_init (&actions) != 0) - return 1; - if (posix_spawn_file_actions_addclose (&actions, 10000000) == 0) - return 2; - return 0; -}]])], - [gl_cv_func_posix_spawn_file_actions_addclose_works=yes], - [gl_cv_func_posix_spawn_file_actions_addclose_works=no], - [# Guess no on Solaris, yes otherwise. - case "$host_os" in - solaris*) gl_cv_func_posix_spawn_file_actions_addclose_works="guessing no";; - *) gl_cv_func_posix_spawn_file_actions_addclose_works="guessing yes";; - esac - ]) - ]) - case "$gl_cv_func_posix_spawn_file_actions_addclose_works" in - *yes) ;; - *) REPLACE_POSIX_SPAWN_FILE_ACTIONS_ADDCLOSE=1 ;; - esac - fi -]) - -AC_DEFUN([gl_FUNC_POSIX_SPAWN_FILE_ACTIONS_ADDDUP2], -[ - AC_REQUIRE([gl_SPAWN_H_DEFAULTS]) - AC_REQUIRE([AC_PROG_CC]) - AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles - gl_POSIX_SPAWN - if test $REPLACE_POSIX_SPAWN = 1; then - REPLACE_POSIX_SPAWN_FILE_ACTIONS_ADDDUP2=1 - else - dnl On Solaris 11 2011-11, posix_spawn_file_actions_adddup2 succeeds even - dnl if the fd argument is out of range. - AC_CACHE_CHECK([whether posix_spawn_file_actions_adddup2 works], - [gl_cv_func_posix_spawn_file_actions_adddup2_works], - [AC_RUN_IFELSE( - [AC_LANG_SOURCE([[ -#include <spawn.h> -int main () -{ - posix_spawn_file_actions_t actions; - if (posix_spawn_file_actions_init (&actions) != 0) - return 1; - if (posix_spawn_file_actions_adddup2 (&actions, 10000000, 2) == 0) - return 2; - return 0; -}]])], - [gl_cv_func_posix_spawn_file_actions_adddup2_works=yes], - [gl_cv_func_posix_spawn_file_actions_adddup2_works=no], - [# Guess no on Solaris, yes otherwise. - case "$host_os" in - solaris*) gl_cv_func_posix_spawn_file_actions_adddup2_works="guessing no";; - *) gl_cv_func_posix_spawn_file_actions_adddup2_works="guessing yes";; - esac - ]) - ]) - case "$gl_cv_func_posix_spawn_file_actions_adddup2_works" in - *yes) ;; - *) REPLACE_POSIX_SPAWN_FILE_ACTIONS_ADDDUP2=1 ;; - esac - fi -]) - -AC_DEFUN([gl_FUNC_POSIX_SPAWN_FILE_ACTIONS_ADDOPEN], -[ - AC_REQUIRE([gl_SPAWN_H_DEFAULTS]) - AC_REQUIRE([AC_PROG_CC]) - AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles - gl_POSIX_SPAWN - if test $REPLACE_POSIX_SPAWN = 1; then - REPLACE_POSIX_SPAWN_FILE_ACTIONS_ADDOPEN=1 - else - dnl On Solaris 11 2011-11, posix_spawn_file_actions_addopen succeeds even - dnl if the fd argument is out of range. - AC_CACHE_CHECK([whether posix_spawn_file_actions_addopen works], - [gl_cv_func_posix_spawn_file_actions_addopen_works], - [AC_RUN_IFELSE( - [AC_LANG_SOURCE([[ -#include <spawn.h> -#include <fcntl.h> -int main () -{ - posix_spawn_file_actions_t actions; - if (posix_spawn_file_actions_init (&actions) != 0) - return 1; - if (posix_spawn_file_actions_addopen (&actions, 10000000, "foo", 0, O_RDONLY) - == 0) - return 2; - return 0; -}]])], - [gl_cv_func_posix_spawn_file_actions_addopen_works=yes], - [gl_cv_func_posix_spawn_file_actions_addopen_works=no], - [# Guess no on Solaris, yes otherwise. - case "$host_os" in - solaris*) gl_cv_func_posix_spawn_file_actions_addopen_works="guessing no";; - *) gl_cv_func_posix_spawn_file_actions_addopen_works="guessing yes";; - esac - ]) - ]) - case "$gl_cv_func_posix_spawn_file_actions_addopen_works" in - *yes) ;; - *) REPLACE_POSIX_SPAWN_FILE_ACTIONS_ADDOPEN=1 ;; - esac - fi -]) |