Implement <spawn.h>.
As described here:
http://pubs.opengroup.org/onlinepubs/9699919799/functions/posix_spawn.html
And here:
http://man7.org/linux/man-pages/man3/posix_spawn.3.html
Bug: N/A (but mentioned in my inbox since 2013)
Test: ran tests
Change-Id: I0b27b2919b660779e3bd8a25fb429527c16dc621
diff --git a/libc/Android.bp b/libc/Android.bp
index cd01efd..a142f4e 100644
--- a/libc/Android.bp
+++ b/libc/Android.bp
@@ -1530,6 +1530,7 @@
"bionic/sigwait.cpp",
"bionic/sigwaitinfo.cpp",
"bionic/socket.cpp",
+ "bionic/spawn.cpp",
"bionic/stat.cpp",
"bionic/statvfs.cpp",
"bionic/stdlib_l.cpp",
diff --git a/libc/bionic/spawn.cpp b/libc/bionic/spawn.cpp
new file mode 100644
index 0000000..7015ad9
--- /dev/null
+++ b/libc/bionic/spawn.cpp
@@ -0,0 +1,316 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <spawn.h>
+
+#include <fcntl.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "private/ScopedSignalBlocker.h"
+
+enum Action {
+ kOpen,
+ kClose,
+ kDup2
+};
+
+struct __posix_spawn_file_action {
+ __posix_spawn_file_action* next;
+
+ Action what;
+ int fd;
+ int new_fd;
+ char* path;
+ int flags;
+ mode_t mode;
+
+ void Do() {
+ if (what == kOpen) {
+ fd = open(path, flags, mode);
+ if (fd == -1) _exit(127);
+ // If it didn't land where we wanted it, move it.
+ if (fd != new_fd) {
+ if (dup2(fd, new_fd) == -1) _exit(127);
+ close(fd);
+ }
+ } else if (what == kClose) {
+ // Failure to close is ignored.
+ close(fd);
+ } else {
+ if (dup2(fd, new_fd) == -1) _exit(127);
+ }
+ }
+};
+
+struct __posix_spawn_file_actions {
+ __posix_spawn_file_action* head;
+ __posix_spawn_file_action* last;
+
+ void Do() {
+ for (__posix_spawn_file_action* action = head; action != nullptr; action = action->next) {
+ action->Do();
+ }
+ }
+};
+
+struct __posix_spawnattr {
+ short flags;
+ pid_t pgroup;
+ sched_param schedparam;
+ int schedpolicy;
+ sigset_t sigmask;
+ sigset_t sigdefault;
+
+ void Do() {
+ bool use_sigdefault = ((flags & POSIX_SPAWN_SETSIGDEF) != 0);
+
+ for (int s = 1; s < _NSIG; ++s) {
+ struct sigaction sa;
+ if (sigaction(s, nullptr, &sa) == -1) _exit(127);
+ if (sa.sa_handler == SIG_DFL) continue;
+ // POSIX: "Signals set to be caught by the calling process shall be set to the default
+ // action in the child process."
+ // POSIX: "If POSIX_SPAWN_SETSIGDEF is set ... signals in sigdefault ... shall be set to
+ // their default actions in the child process."
+ if (sa.sa_handler != SIG_IGN || (use_sigdefault && sigismember(&sigdefault, s))) {
+ sa.sa_handler = SIG_DFL;
+ if (sigaction(s, &sa, nullptr) == -1) _exit(127);
+ }
+ }
+
+ if ((flags & POSIX_SPAWN_SETPGROUP) != 0 && setpgid(0, pgroup) == -1) _exit(127);
+ if ((flags & POSIX_SPAWN_SETSID) != 0 && setsid() == -1) _exit(127);
+
+ // POSIX_SPAWN_SETSCHEDULER overrides POSIX_SPAWN_SETSCHEDPARAM, but it is not an error
+ // to set both.
+ if ((flags & POSIX_SPAWN_SETSCHEDULER) != 0) {
+ if (sched_setscheduler(0, schedpolicy, &schedparam) == -1) _exit(127);
+ } else if ((flags & POSIX_SPAWN_SETSCHEDPARAM) != 0) {
+ if (sched_setparam(0, &schedparam) == -1) _exit(127);
+ }
+
+ if ((flags & POSIX_SPAWN_RESETIDS) != 0) {
+ if (seteuid(getuid()) == -1 || setegid(getgid()) == -1) _exit(127);
+ }
+
+ if ((flags & POSIX_SPAWN_SETSIGMASK) != 0) {
+ if (sigprocmask(SIG_SETMASK, &sigmask, nullptr)) _exit(127);
+ }
+ }
+};
+
+static int posix_spawn(pid_t* pid_ptr,
+ const char* path,
+ const posix_spawn_file_actions_t* actions,
+ const posix_spawnattr_t* attr,
+ char* const argv[],
+ char* const env[],
+ int exec_fn(const char* path, char* const argv[], char* const env[])) {
+ // See http://man7.org/linux/man-pages/man3/posix_spawn.3.html
+ // and http://pubs.opengroup.org/onlinepubs/9699919799/functions/posix_spawn.html
+
+ ScopedSignalBlocker ssb;
+
+ short flags = attr ? (*attr)->flags : 0;
+ bool use_vfork = ((flags & POSIX_SPAWN_USEVFORK) != 0) || (actions == nullptr && flags == 0);
+
+ pid_t pid = use_vfork ? vfork() : fork();
+ if (pid == -1) return errno;
+
+ if (pid == 0) {
+ // Child.
+ if (attr) (*attr)->Do();
+ if (actions) (*actions)->Do();
+ if ((flags & POSIX_SPAWN_SETSIGMASK) == 0) ssb.reset();
+ exec_fn(path, argv, env ? env : environ);
+ _exit(127);
+ }
+
+ // Parent.
+ if (pid_ptr) *pid_ptr = pid;
+ return 0;
+}
+
+int posix_spawn(pid_t* pid, const char* path, const posix_spawn_file_actions_t* actions,
+ const posix_spawnattr_t* attr, char* const argv[], char* const env[]) {
+ return posix_spawn(pid, path, actions, attr, argv, env, execve);
+}
+
+int posix_spawnp(pid_t* pid, const char* file, const posix_spawn_file_actions_t* actions,
+ const posix_spawnattr_t* attr, char* const argv[], char* const env[]) {
+ return posix_spawn(pid, file, actions, attr, argv, env, execvpe);
+}
+
+int posix_spawnattr_init(posix_spawnattr_t* attr) {
+ *attr = reinterpret_cast<__posix_spawnattr*>(calloc(1, sizeof(__posix_spawnattr)));
+ return (*attr == nullptr) ? errno : 0;
+}
+
+int posix_spawnattr_destroy(posix_spawnattr_t* attr) {
+ free(*attr);
+ *attr = nullptr;
+ return 0;
+}
+
+int posix_spawnattr_setflags(posix_spawnattr_t* attr, short flags) {
+ if ((flags & ~(POSIX_SPAWN_RESETIDS | POSIX_SPAWN_SETPGROUP | POSIX_SPAWN_SETSIGDEF |
+ POSIX_SPAWN_SETSIGMASK | POSIX_SPAWN_SETSCHEDPARAM | POSIX_SPAWN_SETSCHEDULER |
+ POSIX_SPAWN_USEVFORK | POSIX_SPAWN_SETSID)) != 0) {
+ return EINVAL;
+ }
+ (*attr)->flags = flags;
+ return 0;
+}
+
+int posix_spawnattr_getflags(const posix_spawnattr_t* attr, short* flags) {
+ *flags = (*attr)->flags;
+ return 0;
+}
+
+int posix_spawnattr_setpgroup(posix_spawnattr_t* attr, pid_t pgroup) {
+ (*attr)->pgroup = pgroup;
+ return 0;
+}
+
+int posix_spawnattr_getpgroup(const posix_spawnattr_t* attr, pid_t* pgroup) {
+ *pgroup = (*attr)->pgroup;
+ return 0;
+}
+
+int posix_spawnattr_setsigmask(posix_spawnattr_t* attr, const sigset_t* mask) {
+ (*attr)->sigmask = *mask;
+ return 0;
+}
+
+int posix_spawnattr_getsigmask(const posix_spawnattr_t* attr, sigset_t* mask) {
+ *mask = (*attr)->sigmask;
+ return 0;
+}
+
+int posix_spawnattr_setsigdefault(posix_spawnattr_t* attr, const sigset_t* mask) {
+ (*attr)->sigdefault = *mask;
+ return 0;
+}
+
+int posix_spawnattr_getsigdefault(const posix_spawnattr_t* attr, sigset_t* mask) {
+ *mask = (*attr)->sigdefault;
+ return 0;
+}
+
+int posix_spawnattr_setschedparam(posix_spawnattr_t* attr, const struct sched_param* param) {
+ (*attr)->schedparam = *param;
+ return 0;
+}
+
+int posix_spawnattr_getschedparam(const posix_spawnattr_t* attr, struct sched_param* param) {
+ *param = (*attr)->schedparam;
+ return 0;
+}
+
+int posix_spawnattr_setschedpolicy(posix_spawnattr_t* attr, int policy) {
+ (*attr)->schedpolicy = policy;
+ return 0;
+}
+
+int posix_spawnattr_getschedpolicy(const posix_spawnattr_t* attr, int* policy) {
+ *policy = (*attr)->schedpolicy;
+ return 0;
+}
+
+int posix_spawn_file_actions_init(posix_spawn_file_actions_t* actions) {
+ *actions = reinterpret_cast<__posix_spawn_file_actions*>(calloc(1, sizeof(**actions)));
+ return (*actions == nullptr) ? errno : 0;
+}
+
+int posix_spawn_file_actions_destroy(posix_spawn_file_actions_t* actions) {
+ __posix_spawn_file_action* a = (*actions)->head;
+ while (a) {
+ __posix_spawn_file_action* last = a;
+ a = a->next;
+ free(last->path);
+ free(last);
+ }
+ free(*actions);
+ *actions = nullptr;
+ return 0;
+}
+
+static int posix_spawn_add_file_action(posix_spawn_file_actions_t* actions,
+ Action what,
+ int fd,
+ int new_fd,
+ const char* path,
+ int flags,
+ mode_t mode) {
+ __posix_spawn_file_action* action =
+ reinterpret_cast<__posix_spawn_file_action*>(malloc(sizeof(*action)));
+ if (action == nullptr) return errno;
+
+ action->next = nullptr;
+ if (path != nullptr) {
+ action->path = strdup(path);
+ if (action->path == nullptr) {
+ free(action);
+ return errno;
+ }
+ } else {
+ action->path = nullptr;
+ }
+ action->what = what;
+ action->fd = fd;
+ action->new_fd = new_fd;
+ action->flags = flags;
+ action->mode = mode;
+
+ if ((*actions)->head == nullptr) {
+ (*actions)->head = (*actions)->last = action;
+ } else {
+ (*actions)->last->next = action;
+ (*actions)->last = action;
+ }
+
+ return 0;
+}
+
+int posix_spawn_file_actions_addopen(posix_spawn_file_actions_t* actions,
+ int fd, const char* path, int flags, mode_t mode) {
+ if (fd < 0) return EBADF;
+ return posix_spawn_add_file_action(actions, kOpen, -1, fd, path, flags, mode);
+}
+
+int posix_spawn_file_actions_addclose(posix_spawn_file_actions_t* actions, int fd) {
+ if (fd < 0) return EBADF;
+ return posix_spawn_add_file_action(actions, kClose, fd, -1, nullptr, 0, 0);
+}
+
+int posix_spawn_file_actions_adddup2(posix_spawn_file_actions_t* actions, int fd, int new_fd) {
+ if (fd < 0 || new_fd < 0) return EBADF;
+ return posix_spawn_add_file_action(actions, kDup2, fd, new_fd, nullptr, 0, 0);
+}
diff --git a/libc/bionic/tmpfile.cpp b/libc/bionic/tmpfile.cpp
index dc142a9..bda3566 100644
--- a/libc/bionic/tmpfile.cpp
+++ b/libc/bionic/tmpfile.cpp
@@ -39,22 +39,7 @@
#include <unistd.h>
#include "private/ErrnoRestorer.h"
-
-class ScopedSignalBlocker {
- public:
- ScopedSignalBlocker() {
- sigset_t set;
- sigfillset(&set);
- sigprocmask(SIG_BLOCK, &set, &old_set_);
- }
-
- ~ScopedSignalBlocker() {
- sigprocmask(SIG_SETMASK, &old_set_, NULL);
- }
-
- private:
- sigset_t old_set_;
-};
+#include "private/ScopedSignalBlocker.h"
static FILE* __tmpfile_dir(const char* tmp_dir) {
char* path = NULL;
diff --git a/libc/include/bits/posix_limits.h b/libc/include/bits/posix_limits.h
index 4038c3a..e5846d6 100644
--- a/libc/include/bits/posix_limits.h
+++ b/libc/include/bits/posix_limits.h
@@ -68,7 +68,7 @@
#define _POSIX_SEMAPHORES _POSIX_VERSION /* sem_*. */
#define _POSIX_SHARED_MEMORY_OBJECTS __BIONIC_POSIX_FEATURE_MISSING /* mmap/munmap are implemented, but shm_open/shm_unlink are not. */
#define _POSIX_SHELL 1 /* system. */
-#define _POSIX_SPAWN __BIONIC_POSIX_FEATURE_MISSING /* <spawn.h> */
+#define _POSIX_SPAWN __BIONIC_POSIX_FEATURE_SINCE(28) /* <spawn.h> */
#define _POSIX_SPIN_LOCKS __BIONIC_POSIX_FEATURE_SINCE(24) /* pthread_spin_*. */
#define _POSIX_SPORADIC_SERVER _POSIX_VERSION /* sched_setparam/sched_setscheduler. */
#define _POSIX_SYNCHRONIZED_IO _POSIX_VERSION
diff --git a/libc/include/spawn.h b/libc/include/spawn.h
new file mode 100644
index 0000000..ea4bb19
--- /dev/null
+++ b/libc/include/spawn.h
@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef _SPAWN_H_
+#define _SPAWN_H_
+
+#include <sys/cdefs.h>
+#include <sys/types.h>
+#include <sched.h>
+#include <signal.h>
+
+__BEGIN_DECLS
+
+#define POSIX_SPAWN_RESETIDS 1
+#define POSIX_SPAWN_SETPGROUP 2
+#define POSIX_SPAWN_SETSIGDEF 4
+#define POSIX_SPAWN_SETSIGMASK 8
+#define POSIX_SPAWN_SETSCHEDPARAM 16
+#define POSIX_SPAWN_SETSCHEDULER 32
+#if defined(__USE_GNU)
+#define POSIX_SPAWN_USEVFORK 64
+#define POSIX_SPAWN_SETSID 128
+#endif
+
+typedef struct __posix_spawnattr* posix_spawnattr_t;
+typedef struct __posix_spawn_file_actions* posix_spawn_file_actions_t;
+
+int posix_spawn(pid_t* __pid, const char* __path, const posix_spawn_file_actions_t* __actions, const posix_spawnattr_t* __attr, char* const __argv[], char* const __env[]) __INTRODUCED_IN_FUTURE;
+int posix_spawnp(pid_t* __pid, const char* __file, const posix_spawn_file_actions_t* __actions, const posix_spawnattr_t* __attr, char* const __argv[], char* const __env[]) __INTRODUCED_IN_FUTURE;
+
+int posix_spawnattr_init(posix_spawnattr_t* __attr) __INTRODUCED_IN_FUTURE;
+int posix_spawnattr_destroy(posix_spawnattr_t* __attr) __INTRODUCED_IN_FUTURE;
+
+int posix_spawnattr_setflags(posix_spawnattr_t* __attr, short __flags) __INTRODUCED_IN_FUTURE;
+int posix_spawnattr_getflags(const posix_spawnattr_t* __attr, short* __flags) __INTRODUCED_IN_FUTURE;
+
+int posix_spawnattr_setpgroup(posix_spawnattr_t* __attr, pid_t __pgroup) __INTRODUCED_IN_FUTURE;
+int posix_spawnattr_getpgroup(const posix_spawnattr_t* __attr, pid_t* __pgroup) __INTRODUCED_IN_FUTURE;
+
+int posix_spawnattr_setsigmask(posix_spawnattr_t* __attr, const sigset_t* __mask) __INTRODUCED_IN_FUTURE;
+int posix_spawnattr_getsigmask(const posix_spawnattr_t* __attr, sigset_t* __mask) __INTRODUCED_IN_FUTURE;
+
+int posix_spawnattr_setsigdefault(posix_spawnattr_t* __attr, const sigset_t* __mask) __INTRODUCED_IN_FUTURE;
+int posix_spawnattr_getsigdefault(const posix_spawnattr_t* __attr, sigset_t* __mask) __INTRODUCED_IN_FUTURE;
+
+int posix_spawnattr_setschedparam(posix_spawnattr_t* __attr, const struct sched_param* __param) __INTRODUCED_IN_FUTURE;
+int posix_spawnattr_getschedparam(const posix_spawnattr_t* __attr, struct sched_param* __param) __INTRODUCED_IN_FUTURE;
+
+int posix_spawnattr_setschedpolicy(posix_spawnattr_t* __attr, int __policy) __INTRODUCED_IN_FUTURE;
+int posix_spawnattr_getschedpolicy(const posix_spawnattr_t* __attr, int* __policy) __INTRODUCED_IN_FUTURE;
+
+int posix_spawn_file_actions_init(posix_spawn_file_actions_t* __actions) __INTRODUCED_IN_FUTURE;
+int posix_spawn_file_actions_destroy(posix_spawn_file_actions_t* __actions) __INTRODUCED_IN_FUTURE;
+
+int posix_spawn_file_actions_addopen(posix_spawn_file_actions_t* __actions, int __fd, const char* __path, int __flags, mode_t __mode) __INTRODUCED_IN_FUTURE;
+int posix_spawn_file_actions_addclose(posix_spawn_file_actions_t* __actions, int __fd) __INTRODUCED_IN_FUTURE;
+int posix_spawn_file_actions_adddup2(posix_spawn_file_actions_t* __actions, int __fd, int __new_fd) __INTRODUCED_IN_FUTURE;
+
+__END_DECLS
+
+#endif
diff --git a/libc/libc.arm.map b/libc/libc.arm.map
index 13c267a..08ba59f 100644
--- a/libc/libc.arm.map
+++ b/libc/libc.arm.map
@@ -1336,6 +1336,27 @@
iconv;
iconv_close;
iconv_open;
+ posix_spawn;
+ posix_spawnattr_destroy;
+ posix_spawnattr_getflags;
+ posix_spawnattr_getpgroup;
+ posix_spawnattr_getschedparam;
+ posix_spawnattr_getschedpolicy;
+ posix_spawnattr_getsigdefault;
+ posix_spawnattr_getsigmask;
+ posix_spawnattr_init;
+ posix_spawnattr_setflags;
+ posix_spawnattr_setpgroup;
+ posix_spawnattr_setschedparam;
+ posix_spawnattr_setschedpolicy;
+ posix_spawnattr_setsigdefault;
+ posix_spawnattr_setsigmask;
+ posix_spawn_file_actions_addclose;
+ posix_spawn_file_actions_adddup2;
+ posix_spawn_file_actions_addopen;
+ posix_spawn_file_actions_destroy;
+ posix_spawn_file_actions_init;
+ posix_spawnp;
syncfs;
} LIBC_O;
diff --git a/libc/libc.arm64.map b/libc/libc.arm64.map
index 9d8c1b7..400c95f 100644
--- a/libc/libc.arm64.map
+++ b/libc/libc.arm64.map
@@ -1256,6 +1256,27 @@
iconv;
iconv_close;
iconv_open;
+ posix_spawn;
+ posix_spawnattr_destroy;
+ posix_spawnattr_getflags;
+ posix_spawnattr_getpgroup;
+ posix_spawnattr_getschedparam;
+ posix_spawnattr_getschedpolicy;
+ posix_spawnattr_getsigdefault;
+ posix_spawnattr_getsigmask;
+ posix_spawnattr_init;
+ posix_spawnattr_setflags;
+ posix_spawnattr_setpgroup;
+ posix_spawnattr_setschedparam;
+ posix_spawnattr_setschedpolicy;
+ posix_spawnattr_setsigdefault;
+ posix_spawnattr_setsigmask;
+ posix_spawn_file_actions_addclose;
+ posix_spawn_file_actions_adddup2;
+ posix_spawn_file_actions_addopen;
+ posix_spawn_file_actions_destroy;
+ posix_spawn_file_actions_init;
+ posix_spawnp;
syncfs;
} LIBC_O;
diff --git a/libc/libc.map.txt b/libc/libc.map.txt
index da462d3..eb5c1e4 100644
--- a/libc/libc.map.txt
+++ b/libc/libc.map.txt
@@ -1361,6 +1361,27 @@
iconv;
iconv_close;
iconv_open;
+ posix_spawn;
+ posix_spawnattr_destroy;
+ posix_spawnattr_getflags;
+ posix_spawnattr_getpgroup;
+ posix_spawnattr_getschedparam;
+ posix_spawnattr_getschedpolicy;
+ posix_spawnattr_getsigdefault;
+ posix_spawnattr_getsigmask;
+ posix_spawnattr_init;
+ posix_spawnattr_setflags;
+ posix_spawnattr_setpgroup;
+ posix_spawnattr_setschedparam;
+ posix_spawnattr_setschedpolicy;
+ posix_spawnattr_setsigdefault;
+ posix_spawnattr_setsigmask;
+ posix_spawn_file_actions_addclose;
+ posix_spawn_file_actions_adddup2;
+ posix_spawn_file_actions_addopen;
+ posix_spawn_file_actions_destroy;
+ posix_spawn_file_actions_init;
+ posix_spawnp;
syncfs;
} LIBC_O;
diff --git a/libc/libc.mips.map b/libc/libc.mips.map
index 3e41f95..16f1209 100644
--- a/libc/libc.mips.map
+++ b/libc/libc.mips.map
@@ -1320,6 +1320,27 @@
iconv;
iconv_close;
iconv_open;
+ posix_spawn;
+ posix_spawnattr_destroy;
+ posix_spawnattr_getflags;
+ posix_spawnattr_getpgroup;
+ posix_spawnattr_getschedparam;
+ posix_spawnattr_getschedpolicy;
+ posix_spawnattr_getsigdefault;
+ posix_spawnattr_getsigmask;
+ posix_spawnattr_init;
+ posix_spawnattr_setflags;
+ posix_spawnattr_setpgroup;
+ posix_spawnattr_setschedparam;
+ posix_spawnattr_setschedpolicy;
+ posix_spawnattr_setsigdefault;
+ posix_spawnattr_setsigmask;
+ posix_spawn_file_actions_addclose;
+ posix_spawn_file_actions_adddup2;
+ posix_spawn_file_actions_addopen;
+ posix_spawn_file_actions_destroy;
+ posix_spawn_file_actions_init;
+ posix_spawnp;
syncfs;
} LIBC_O;
diff --git a/libc/libc.mips64.map b/libc/libc.mips64.map
index 9d8c1b7..400c95f 100644
--- a/libc/libc.mips64.map
+++ b/libc/libc.mips64.map
@@ -1256,6 +1256,27 @@
iconv;
iconv_close;
iconv_open;
+ posix_spawn;
+ posix_spawnattr_destroy;
+ posix_spawnattr_getflags;
+ posix_spawnattr_getpgroup;
+ posix_spawnattr_getschedparam;
+ posix_spawnattr_getschedpolicy;
+ posix_spawnattr_getsigdefault;
+ posix_spawnattr_getsigmask;
+ posix_spawnattr_init;
+ posix_spawnattr_setflags;
+ posix_spawnattr_setpgroup;
+ posix_spawnattr_setschedparam;
+ posix_spawnattr_setschedpolicy;
+ posix_spawnattr_setsigdefault;
+ posix_spawnattr_setsigmask;
+ posix_spawn_file_actions_addclose;
+ posix_spawn_file_actions_adddup2;
+ posix_spawn_file_actions_addopen;
+ posix_spawn_file_actions_destroy;
+ posix_spawn_file_actions_init;
+ posix_spawnp;
syncfs;
} LIBC_O;
diff --git a/libc/libc.x86.map b/libc/libc.x86.map
index c3d678c..94ee319 100644
--- a/libc/libc.x86.map
+++ b/libc/libc.x86.map
@@ -1318,6 +1318,27 @@
iconv;
iconv_close;
iconv_open;
+ posix_spawn;
+ posix_spawnattr_destroy;
+ posix_spawnattr_getflags;
+ posix_spawnattr_getpgroup;
+ posix_spawnattr_getschedparam;
+ posix_spawnattr_getschedpolicy;
+ posix_spawnattr_getsigdefault;
+ posix_spawnattr_getsigmask;
+ posix_spawnattr_init;
+ posix_spawnattr_setflags;
+ posix_spawnattr_setpgroup;
+ posix_spawnattr_setschedparam;
+ posix_spawnattr_setschedpolicy;
+ posix_spawnattr_setsigdefault;
+ posix_spawnattr_setsigmask;
+ posix_spawn_file_actions_addclose;
+ posix_spawn_file_actions_adddup2;
+ posix_spawn_file_actions_addopen;
+ posix_spawn_file_actions_destroy;
+ posix_spawn_file_actions_init;
+ posix_spawnp;
syncfs;
} LIBC_O;
diff --git a/libc/libc.x86_64.map b/libc/libc.x86_64.map
index 9d8c1b7..400c95f 100644
--- a/libc/libc.x86_64.map
+++ b/libc/libc.x86_64.map
@@ -1256,6 +1256,27 @@
iconv;
iconv_close;
iconv_open;
+ posix_spawn;
+ posix_spawnattr_destroy;
+ posix_spawnattr_getflags;
+ posix_spawnattr_getpgroup;
+ posix_spawnattr_getschedparam;
+ posix_spawnattr_getschedpolicy;
+ posix_spawnattr_getsigdefault;
+ posix_spawnattr_getsigmask;
+ posix_spawnattr_init;
+ posix_spawnattr_setflags;
+ posix_spawnattr_setpgroup;
+ posix_spawnattr_setschedparam;
+ posix_spawnattr_setschedpolicy;
+ posix_spawnattr_setsigdefault;
+ posix_spawnattr_setsigmask;
+ posix_spawn_file_actions_addclose;
+ posix_spawn_file_actions_adddup2;
+ posix_spawn_file_actions_addopen;
+ posix_spawn_file_actions_destroy;
+ posix_spawn_file_actions_init;
+ posix_spawnp;
syncfs;
} LIBC_O;
diff --git a/libc/private/ScopedSignalBlocker.h b/libc/private/ScopedSignalBlocker.h
new file mode 100644
index 0000000..35d1c58
--- /dev/null
+++ b/libc/private/ScopedSignalBlocker.h
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef SCOPED_SIGNAL_BLOCKER_H
+#define SCOPED_SIGNAL_BLOCKER_H
+
+#include <signal.h>
+
+#include "bionic_macros.h"
+
+class ScopedSignalBlocker {
+ public:
+ explicit ScopedSignalBlocker() {
+ sigset_t set;
+ sigfillset(&set);
+ sigprocmask(SIG_BLOCK, &set, &old_set_);
+ }
+
+ ~ScopedSignalBlocker() {
+ reset();
+ }
+
+ void reset() {
+ sigprocmask(SIG_SETMASK, &old_set_, nullptr);
+ }
+
+ private:
+ sigset_t old_set_;
+
+ DISALLOW_COPY_AND_ASSIGN(ScopedSignalBlocker);
+};
+
+#endif