diff --git a/libiberty/aclocal.m4 b/libiberty/aclocal.m4
index 0757688d52a4c8c620f4cd79e45608f61122a01d..f327865aaf9be5de7b6634ca8415108c33434b54 100644
--- a/libiberty/aclocal.m4
+++ b/libiberty/aclocal.m4
@@ -1,6 +1,6 @@
-# generated automatically by aclocal 1.15.1 -*- Autoconf -*-
+# generated automatically by aclocal 1.16.5 -*- Autoconf -*-
-# Copyright (C) 1996-2017 Free Software Foundation, Inc.
+# Copyright (C) 1996-2021 Free Software Foundation, Inc.
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
diff --git a/libiberty/config.in b/libiberty/config.in
index f7052b5d9588996db1856acd2ba1d86fa80f97f0..050f6cd196133b464925dd6d0c100a3ce8ea827c 100644
--- a/libiberty/config.in
+++ b/libiberty/config.in
@@ -198,6 +198,12 @@
/* Define to 1 if you have the `pipe2' function. */
#undef HAVE_PIPE2
+/* Define to 1 if you have the `posix_spawn' function. */
+#undef HAVE_POSIX_SPAWN
+
+/* Define to 1 if you have the `posix_spawnp' function. */
+#undef HAVE_POSIX_SPAWNP
+
/* Define to 1 if you have the <process.h> header file. */
#undef HAVE_PROCESS_H
@@ -249,6 +255,9 @@
/* Define to 1 if you have the `spawnvpe' function. */
#undef HAVE_SPAWNVPE
+/* Define to 1 if you have the <spawn.h> header file. */
+#undef HAVE_SPAWN_H
+
/* Define to 1 if you have the <stdint.h> header file. */
#undef HAVE_STDINT_H
diff --git a/libiberty/configure b/libiberty/configure
index dd896270dc63bc3a28263f24efbe758cad44259f..dba458f6bc1e0b9b24128789ace92f84e4372d9f 100755
--- a/libiberty/configure
+++ b/libiberty/configure
@@ -5655,7 +5655,7 @@ host_makefile_frag=${frag}
# It's OK to check for header files. Although the compiler may not be
# able to link anything, it had better be able to at least compile
# something.
-for ac_header in sys/file.h sys/param.h limits.h stdlib.h malloc.h string.h unistd.h strings.h sys/time.h time.h sys/resource.h sys/stat.h sys/mman.h fcntl.h alloca.h sys/pstat.h sys/sysmp.h sys/sysinfo.h machine/hal_sysinfo.h sys/table.h sys/sysctl.h sys/systemcfg.h stdint.h stdio_ext.h process.h sys/prctl.h
+for ac_header in sys/file.h sys/param.h limits.h stdlib.h malloc.h string.h unistd.h strings.h sys/time.h time.h sys/resource.h sys/stat.h sys/mman.h fcntl.h alloca.h sys/pstat.h sys/sysmp.h sys/sysinfo.h machine/hal_sysinfo.h sys/table.h sys/sysctl.h sys/systemcfg.h stdint.h stdio_ext.h process.h sys/prctl.h spawn.h
do :
as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
ac_fn_c_check_header_preproc "$LINENO" "$ac_header" "$as_ac_Header"
@@ -6164,7 +6164,8 @@ funcs="$funcs setproctitle"
vars="sys_errlist sys_nerr sys_siglist"
checkfuncs="__fsetlocking canonicalize_file_name dup3 getrlimit getrusage \
- getsysinfo gettimeofday on_exit pipe2 psignal pstat_getdynamic pstat_getstatic \
+ getsysinfo gettimeofday on_exit pipe2 posix_spawn posix_spawnp psignal \
+ pstat_getdynamic pstat_getstatic \
realpath setrlimit spawnve spawnvpe strerror strsignal sysconf sysctl \
sysmp table times wait3 wait4"
@@ -6187,7 +6188,8 @@ if test "x" = "y"; then
index insque \
memchr memcmp memcpy memmem memmove memset mkstemps \
on_exit \
- pipe2 psignal pstat_getdynamic pstat_getstatic putenv \
+ pipe2 posix_spawn posix_spawnp psignal \
+ pstat_getdynamic pstat_getstatic putenv \
random realpath rename rindex \
sbrk setenv setproctitle setrlimit sigsetmask snprintf spawnve spawnvpe \
stpcpy stpncpy strcasecmp strchr strdup \
diff --git a/libiberty/configure.ac b/libiberty/configure.ac
index 0748c592704abb836d3ad4935a1b853c51425c4f..2488b031bc845362eb35acdc57f20ccd4da1700b 100644
--- a/libiberty/configure.ac
+++ b/libiberty/configure.ac
@@ -289,7 +289,7 @@ AC_SUBST_FILE(host_makefile_frag)
# It's OK to check for header files. Although the compiler may not be
# able to link anything, it had better be able to at least compile
# something.
-AC_CHECK_HEADERS(sys/file.h sys/param.h limits.h stdlib.h malloc.h string.h unistd.h strings.h sys/time.h time.h sys/resource.h sys/stat.h sys/mman.h fcntl.h alloca.h sys/pstat.h sys/sysmp.h sys/sysinfo.h machine/hal_sysinfo.h sys/table.h sys/sysctl.h sys/systemcfg.h stdint.h stdio_ext.h process.h sys/prctl.h)
+AC_CHECK_HEADERS(sys/file.h sys/param.h limits.h stdlib.h malloc.h string.h unistd.h strings.h sys/time.h time.h sys/resource.h sys/stat.h sys/mman.h fcntl.h alloca.h sys/pstat.h sys/sysmp.h sys/sysinfo.h machine/hal_sysinfo.h sys/table.h sys/sysctl.h sys/systemcfg.h stdint.h stdio_ext.h process.h sys/prctl.h spawn.h)
AC_HEADER_SYS_WAIT
AC_HEADER_TIME
@@ -412,7 +412,8 @@ funcs="$funcs setproctitle"
vars="sys_errlist sys_nerr sys_siglist"
checkfuncs="__fsetlocking canonicalize_file_name dup3 getrlimit getrusage \
- getsysinfo gettimeofday on_exit pipe2 psignal pstat_getdynamic pstat_getstatic \
+ getsysinfo gettimeofday on_exit pipe2 posix_spawn posix_spawnp psignal \
+ pstat_getdynamic pstat_getstatic \
realpath setrlimit spawnve spawnvpe strerror strsignal sysconf sysctl \
sysmp table times wait3 wait4"
@@ -435,7 +436,8 @@ if test "x" = "y"; then
index insque \
memchr memcmp memcpy memmem memmove memset mkstemps \
on_exit \
- pipe2 psignal pstat_getdynamic pstat_getstatic putenv \
+ pipe2 posix_spawn posix_spawnp psignal \
+ pstat_getdynamic pstat_getstatic putenv \
random realpath rename rindex \
sbrk setenv setproctitle setrlimit sigsetmask snprintf spawnve spawnvpe \
stpcpy stpncpy strcasecmp strchr strdup \
diff --git a/libiberty/pex-unix.c b/libiberty/pex-unix.c
index 33b5bce31c26cd81c068e1adb4ce7927725e8979..ee52789d264c71c7b4b38ebc641f351df39e3373 100644
--- a/libiberty/pex-unix.c
+++ b/libiberty/pex-unix.c
@@ -58,6 +58,9 @@ extern int errno;
#ifdef HAVE_PROCESS_H
#include <process.h>
#endif
+#ifdef HAVE_SPAWN_H
+#include <spawn.h>
+#endif
#ifdef vfork /* Autoconf may define this to fork for us. */
# define VFORK_STRING "fork"
@@ -559,6 +562,171 @@ pex_unix_exec_child (struct pex_obj *obj ATTRIBUTE_UNUSED,
return (pid_t) -1;
}
+#elif defined(HAVE_POSIX_SPAWN) && defined(HAVE_POSIX_SPAWNP)
+/* Implementation of pex->exec_child using posix_spawn. */
+
+static pid_t
+pex_unix_exec_child (struct pex_obj *obj ATTRIBUTE_UNUSED,
+ int flags, const char *executable,
+ char * const * argv, char * const * env,
+ int in, int out, int errdes,
+ int toclose, const char **errmsg, int *err)
+{
+ int ret;
+ pid_t pid = -1;
+ posix_spawnattr_t attr;
+ posix_spawn_file_actions_t actions;
+ int attr_initialized = 0, actions_initialized = 0;
+
+ *err = 0;
+
+ ret = posix_spawnattr_init (&attr);
+ if (ret)
+ {
+ *err = ret;
+ *errmsg = "posix_spawnattr_init";
+ goto exit;
+ }
+ attr_initialized = 1;
+
+ /* Use vfork() on glibc <=2.24. */
+#ifdef POSIX_SPAWN_USEVFORK
+ ret = posix_spawnattr_setflags (&attr, POSIX_SPAWN_USEVFORK);
+ if (ret)
+ {
+ *err = ret;
+ *errmsg = "posix_spawnattr_setflags";
+ goto exit;
+ }
+#endif
+
+ ret = posix_spawn_file_actions_init (&actions);
+ if (ret)
+ {
+ *err = ret;
+ *errmsg = "posix_spawn_file_actions_init";
+ goto exit;
+ }
+ actions_initialized = 1;
+
+ if (in != STDIN_FILE_NO)
+ {
+ ret = posix_spawn_file_actions_adddup2 (&actions, in, STDIN_FILE_NO);
+ if (ret)
+ {
+ *err = ret;
+ *errmsg = "posix_spawn_file_actions_adddup2";
+ goto exit;
+ }
+
+ ret = posix_spawn_file_actions_addclose (&actions, in);
+ if (ret)
+ {
+ *err = ret;
+ *errmsg = "posix_spawn_file_actions_addclose";
+ goto exit;
+ }
+ }
+
+ if (out != STDOUT_FILE_NO)
+ {
+ ret = posix_spawn_file_actions_adddup2 (&actions, out, STDOUT_FILE_NO);
+ if (ret)
+ {
+ *err = ret;
+ *errmsg = "posix_spawn_file_actions_adddup2";
+ goto exit;
+ }
+
+ ret = posix_spawn_file_actions_addclose (&actions, out);
+ if (ret)
+ {
+ *err = ret;
+ *errmsg = "posix_spawn_file_actions_addclose";
+ goto exit;
+ }
+ }
+
+ if (errdes != STDERR_FILE_NO)
+ {
+ ret = posix_spawn_file_actions_adddup2 (&actions, errdes, STDERR_FILE_NO);
+ if (ret)
+ {
+ *err = ret;
+ *errmsg = "posix_spawn_file_actions_adddup2";
+ goto exit;
+ }
+
+ ret = posix_spawn_file_actions_addclose (&actions, errdes);
+ if (ret)
+ {
+ *err = ret;
+ *errmsg = "posix_spawn_file_actions_addclose";
+ goto exit;
+ }
+ }
+
+ if (toclose >= 0)
+ {
+ ret = posix_spawn_file_actions_addclose (&actions, toclose);
+ if (ret)
+ {
+ *err = ret;
+ *errmsg = "posix_spawn_file_actions_addclose";
+ goto exit;
+ }
+ }
+
+ if ((flags & PEX_STDERR_TO_STDOUT) != 0)
+ {
+ ret = posix_spawn_file_actions_adddup2 (&actions, STDOUT_FILE_NO, STDERR_FILE_NO);
+ if (ret)
+ {
+ *err = ret;
+ *errmsg = "posix_spawn_file_actions_adddup2";
+ goto exit;
+ }
+ }
+
+ if ((flags & PEX_SEARCH) != 0)
+ {
+ ret = posix_spawnp (&pid, executable, &actions, &attr, argv, env ? env : environ);
+ if (ret)
+ {
+ *err = ret;
+ *errmsg = "posix_spawnp";
+ goto exit;
+ }
+ }
+ else
+ {
+ ret = posix_spawn (&pid, executable, &actions, &attr, argv, env ? env : environ);
+ if (ret)
+ {
+ *err = ret;
+ *errmsg = "posix_spawn";
+ goto exit;
+ }
+ }
+
+exit:
+ if (actions_initialized)
+ posix_spawn_file_actions_destroy (&actions);
+ if (attr_initialized)
+ posix_spawnattr_destroy (&attr);
+
+ if (!*err && in != STDIN_FILE_NO)
+ if (close (in))
+ *errmsg = "close", *err = errno, pid = -1;
+ if (!*err && out != STDOUT_FILE_NO)
+ if (close (out))
+ *errmsg = "close", *err = errno, pid = -1;
+ if (!*err && errdes != STDERR_FILE_NO)
+ if (close (errdes))
+ *errmsg = "close", *err = errno, pid = -1;
+
+ return pid;
+}
#else
/* Implementation of pex->exec_child using standard vfork + exec. */