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-rw-r--r--ChangeLog15
-rw-r--r--NEWS5
-rw-r--r--posix/Makefile2
-rw-r--r--posix/spawn.h1
-rw-r--r--posix/spawnattr_setflags.c1
-rw-r--r--posix/tst-posix_spawn-setsid.c95
-rw-r--r--sysdeps/mach/hurd/spawni.c3
-rw-r--r--sysdeps/posix/spawni.c7
-rw-r--r--sysdeps/unix/sysv/linux/spawni.c4
9 files changed, 131 insertions, 2 deletions
diff --git a/ChangeLog b/ChangeLog
index 2f72e4bfe4..449c6a282b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,18 @@
+2017-04-24 Daurnimator <quae@daurnimator.com>
+ Adhemerval Zanella <adhemerval.zanella@linaro.org>
+
+ [BZ #21340]
+ * posix/Makefile (tests): Add tst-posix_spawn-setsid to list of tests.
+ * posix/spawn.h: define POSIX_SPAWN_SETSID flag.
+ * posix/spawnattr_setflags.c (ALL_FLAGS): Add POSIX_SPAWN_SETSID to
+ valid flags.
+ * posix/tst-posix_spawn-setsid.c: Add test for POSIX_SPAWN_SETSID.
+ * sysdeps/mach/hurd/spawni.c (__spawni): Implementation of
+ POSIX_SPAWN_SETSID.
+ * sysdeps/posix/spawni.c (__spawni): Likewise.
+ * sysdeps/unix/sysv/linux/spawni.c (__spawni_child): Likewise.
+ * NEWS: Add note about POSIX_SPAWN_SETSID support.
+
2017-04-24 Gabriel F. T. Gomes <gftg@linux.vnet.ibm.com>
* sysdeps/generic/math_private.h: Move the declaration of many
diff --git a/NEWS b/NEWS
index 811178bca6..5558ca31d8 100644
--- a/NEWS
+++ b/NEWS
@@ -52,6 +52,11 @@ Version 2.26
* The legacy cfree function has been removed. Applications should use the
free function instead.
+* posix_spawnattr_setflags now supports POSIX_SPAWN_SETSID flag to create a
+ new session ID for the posix_spawn and posix_spawnp. It is scheduled to
+ be added on next major revision of POSIX, so current support is enabled
+ with _GNU_SOURCE.
+
Security related changes:
* The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
diff --git a/posix/Makefile b/posix/Makefile
index a6586ea5e8..0fc509c727 100644
--- a/posix/Makefile
+++ b/posix/Makefile
@@ -91,7 +91,7 @@ tests := test-errno tstgetopt testfnm runtests runptests \
bug-getopt5 tst-getopt_long1 bug-regex34 bug-regex35 \
tst-pathconf tst-getaddrinfo4 tst-rxspencer-no-utf8 \
tst-fnmatch3 bug-regex36 tst-getaddrinfo5 \
- tst-posix_spawn-fd \
+ tst-posix_spawn-fd tst-posix_spawn-setsid \
tst-posix_fadvise tst-posix_fadvise64
xtests := bug-ga2
ifeq (yes,$(build-shared))
diff --git a/posix/spawn.h b/posix/spawn.h
index 36e3867e17..a1154a3cdf 100644
--- a/posix/spawn.h
+++ b/posix/spawn.h
@@ -59,6 +59,7 @@ typedef struct
#define POSIX_SPAWN_SETSCHEDULER 0x20
#ifdef __USE_GNU
# define POSIX_SPAWN_USEVFORK 0x40
+# define POSIX_SPAWN_SETSID 0x80
#endif
diff --git a/posix/spawnattr_setflags.c b/posix/spawnattr_setflags.c
index 9b3d1e022a..62d2f00c20 100644
--- a/posix/spawnattr_setflags.c
+++ b/posix/spawnattr_setflags.c
@@ -25,6 +25,7 @@
| POSIX_SPAWN_SETSIGMASK \
| POSIX_SPAWN_SETSCHEDPARAM \
| POSIX_SPAWN_SETSCHEDULER \
+ | POSIX_SPAWN_SETSID \
| POSIX_SPAWN_USEVFORK)
/* Store flags in the attribute structure. */
diff --git a/posix/tst-posix_spawn-setsid.c b/posix/tst-posix_spawn-setsid.c
new file mode 100644
index 0000000000..256bd721b8
--- /dev/null
+++ b/posix/tst-posix_spawn-setsid.c
@@ -0,0 +1,95 @@
+/* Test posix_spawn setsid attribute.
+ Copyright (C) 2017 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
+ 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, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <spawn.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <sys/resource.h>
+#include <unistd.h>
+
+#include <support/check.h>
+
+static void
+do_test_setsid (bool test_setsid)
+{
+ pid_t sid, child_sid;
+ int res;
+
+ /* Current session ID. */
+ sid = getsid(0);
+ if (sid == (pid_t) -1)
+ FAIL_EXIT1 ("getsid (0): %m");
+
+ posix_spawnattr_t attrp;
+ /* posix_spawnattr_init should not fail (it basically memset the
+ attribute). */
+ posix_spawnattr_init (&attrp);
+ if (test_setsid)
+ {
+ res = posix_spawnattr_setflags (&attrp, POSIX_SPAWN_SETSID);
+ if (res != 0)
+ {
+ errno = res;
+ FAIL_EXIT1 ("posix_spawnattr_setflags: %m");
+ }
+ }
+
+ /* Program to run. */
+ char *args[2] = { (char *) "true", NULL };
+ pid_t child;
+
+ res = posix_spawnp (&child, "true", NULL, &attrp, args, environ);
+ /* posix_spawnattr_destroy is noop. */
+ posix_spawnattr_destroy (&attrp);
+
+ if (res != 0)
+ {
+ errno = res;
+ FAIL_EXIT1 ("posix_spawnp: %m");
+ }
+
+ /* Child should have a different session ID than parent. */
+ child_sid = getsid (child);
+
+ if (child_sid == (pid_t) -1)
+ FAIL_EXIT1 ("getsid (%i): %m", child);
+
+ if (test_setsid)
+ {
+ if (child_sid == sid)
+ FAIL_EXIT1 ("child session ID matched parent one");
+ }
+ else
+ {
+ if (child_sid != sid)
+ FAIL_EXIT1 ("child session ID did not match parent one");
+ }
+}
+
+static int
+do_test (void)
+{
+ do_test_setsid (false);
+ do_test_setsid (true);
+
+ return 0;
+}
+
+#include <support/test-driver.c>
diff --git a/sysdeps/mach/hurd/spawni.c b/sysdeps/mach/hurd/spawni.c
index 284875ac30..74303839e4 100644
--- a/sysdeps/mach/hurd/spawni.c
+++ b/sysdeps/mach/hurd/spawni.c
@@ -281,6 +281,9 @@ __spawni (pid_t *pid, const char *file,
}
#endif
+ if (!err && (flags & POSIX_SPAWN_SETSID) != 0)
+ err = __proc_setsid (proc);
+
/* Set the process group ID. */
if (!err && (flags & POSIX_SPAWN_SETPGROUP) != 0)
err = __proc_setpgrp (proc, new_pid, attrp->__pgrp);
diff --git a/sysdeps/posix/spawni.c b/sysdeps/posix/spawni.c
index 5cc2ad1363..9cad25ca4e 100644
--- a/sysdeps/posix/spawni.c
+++ b/sysdeps/posix/spawni.c
@@ -101,7 +101,8 @@ __spawni (pid_t *pid, const char *file,
to POSIX. */
|| ((flags & (POSIX_SPAWN_SETSIGMASK | POSIX_SPAWN_SETSIGDEF
| POSIX_SPAWN_SETSCHEDPARAM | POSIX_SPAWN_SETSCHEDULER
- | POSIX_SPAWN_SETPGROUP | POSIX_SPAWN_RESETIDS)) == 0
+ | POSIX_SPAWN_SETPGROUP | POSIX_SPAWN_RESETIDS
+ | POSIX_SPAWN_SETSID)) == 0
&& file_actions == NULL))
new_pid = __vfork ();
else
@@ -159,6 +160,10 @@ __spawni (pid_t *pid, const char *file,
}
#endif
+ if ((flags & POSIX_SPAWN_SETSID) != 0
+ && __setsid () < 0)
+ _exit (SPAWN_ERROR);
+
/* Set the process group ID. */
if ((flags & POSIX_SPAWN_SETPGROUP) != 0
&& __setpgid (0, attrp->__pgrp) != 0)
diff --git a/sysdeps/unix/sysv/linux/spawni.c b/sysdeps/unix/sysv/linux/spawni.c
index d7f9e83575..a10c1aa363 100644
--- a/sysdeps/unix/sysv/linux/spawni.c
+++ b/sysdeps/unix/sysv/linux/spawni.c
@@ -177,6 +177,10 @@ __spawni_child (void *arguments)
}
#endif
+ if ((attr->__flags & POSIX_SPAWN_SETSID) != 0
+ && __setsid () < 0)
+ goto fail;
+
/* Set the process group ID. */
if ((attr->__flags & POSIX_SPAWN_SETPGROUP) != 0
&& (ret = __setpgid (0, attr->__pgrp)) != 0)