diff options
| -rw-r--r-- | ChangeLog | 15 | ||||
| -rw-r--r-- | NEWS | 5 | ||||
| -rw-r--r-- | posix/Makefile | 2 | ||||
| -rw-r--r-- | posix/spawn.h | 1 | ||||
| -rw-r--r-- | posix/spawnattr_setflags.c | 1 | ||||
| -rw-r--r-- | posix/tst-posix_spawn-setsid.c | 95 | ||||
| -rw-r--r-- | sysdeps/mach/hurd/spawni.c | 3 | ||||
| -rw-r--r-- | sysdeps/posix/spawni.c | 7 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/spawni.c | 4 |
9 files changed, 131 insertions, 2 deletions
@@ -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 @@ -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) |