@@ -34,6 +34,11 @@ Major new features:
greater than given integer. This function is a GNU extension, although it
also present in other systems.
+* The posix_spawn_file_actions_closefrom_np has been added, enabling
+ posix_spawn and posix_spawnp to close all file descriptors greater than
+ a giver interger. This function is a GNU extension, although Solaris also
+ provides a similar function.
+
Deprecated and removed features, and other changes affecting compatibility:
* The mallinfo function is marked deprecated. Callers should call
@@ -57,6 +57,7 @@ routines := \
spawn_faction_init spawn_faction_destroy spawn_faction_addclose \
spawn_faction_addopen spawn_faction_adddup2 spawn_valid_fd \
spawn_faction_addchdir spawn_faction_addfchdir \
+ spawn_faction_addclosefrom \
spawnattr_init spawnattr_destroy \
spawnattr_getdefault spawnattr_setdefault \
spawnattr_getflags spawnattr_setflags \
@@ -102,7 +103,7 @@ tests := test-errno tstgetopt testfnm runtests runptests \
tst-sysconf-empty-chroot tst-glob_symlinks tst-fexecve \
tst-glob-tilde test-ssize-max tst-spawn4 bug-regex37 \
bug-regex38 tst-regcomp-truncated tst-spawn-chdir \
- tst-wordexp-nocmd
+ tst-wordexp-nocmd tst-spawn5
tests-internal := bug-regex5 bug-regex20 bug-regex33 \
tst-rfc3484 tst-rfc3484-2 tst-rfc3484-3 \
tst-glob_lstat_compat tst-spawn4-compat
@@ -258,6 +259,7 @@ tst-exec-static-ARGS = $(tst-exec-ARGS)
tst-execvpe5-ARGS = -- $(host-test-program-cmd)
tst-spawn-ARGS = -- $(host-test-program-cmd)
tst-spawn-static-ARGS = $(tst-spawn-ARGS)
+tst-spawn5-ARGS = -- $(host-test-program-cmd)
tst-dir-ARGS = `pwd` `cd $(common-objdir)/$(subdir); pwd` `cd $(common-objdir); pwd` $(objpfx)tst-dir
tst-chmod-ARGS = $(objdir)
tst-vfork3-ARGS = --test-dir=$(objpfx)
@@ -147,6 +147,9 @@ libc {
}
GLIBC_2.30 {
}
+ GLIBC_2.33 {
+ posix_spawn_file_actions_addclosefrom_np;
+ }
GLIBC_PRIVATE {
__libc_fork; __libc_pread; __libc_pwrite;
__nanosleep_nocancel; __pause_nocancel;
@@ -213,6 +213,13 @@ extern int posix_spawn_file_actions_addchdir_np (posix_spawn_file_actions_t *
extern int posix_spawn_file_actions_addfchdir_np (posix_spawn_file_actions_t *,
int __fd)
__THROW __nonnull ((1));
+
+/* Add an action to close all file descriptor greater than FROM during
+ spawn. This affects the subsequent file actions. */
+extern int posix_spawn_file_actions_addclosefrom_np (posix_spawn_file_actions_t *,
+ int __from)
+ __THROW __nonnull ((1));
+
#endif
__END_DECLS
new file mode 100644
@@ -0,0 +1,58 @@
+/* Add a closefrom to a file action list for posix_spawn.
+ Copyright (C) 2020 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 <spawn.h>
+#include <unistd.h>
+#include <spawn_int.h>
+
+int
+__posix_spawn_file_actions_addclosefrom (posix_spawn_file_actions_t
+ *file_actions, int from)
+{
+#if __SPAWN_SUPPORT_CLOSEFROM
+ struct __spawn_action *rec;
+
+ if (!__spawn_valid_fd (from))
+ return EBADF;
+
+ /* Allocate more memory if needed. */
+ if (file_actions->__used == file_actions->__allocated
+ && __posix_spawn_file_actions_realloc (file_actions) != 0)
+ /* This can only mean we ran out of memory. */
+ return ENOMEM;
+
+ /* Add the new value. */
+ rec = &file_actions->__actions[file_actions->__used];
+ rec->tag = spawn_do_closefrom;
+ rec->action.closefrom_action.from = from;
+
+ /* Account for the new entry. */
+ ++file_actions->__used;
+
+ return 0;
+#else
+ __set_errno (EINVAL);
+ return -1;
+#endif
+}
+weak_alias (__posix_spawn_file_actions_addclosefrom,
+ posix_spawn_file_actions_addclosefrom_np)
+#if !__SPAWN_SUPPORT_CLOSEFROM
+stub_warning (posix_spawn_file_actions_addclosefrom_np)
+#endif
@@ -39,6 +39,7 @@ __posix_spawn_file_actions_destroy (posix_spawn_file_actions_t *file_actions)
case spawn_do_close:
case spawn_do_dup2:
case spawn_do_fchdir:
+ case spawn_do_closefrom:
/* No cleanup required. */
break;
}
@@ -20,6 +20,7 @@
#define _SPAWN_INT_H
#include <spawn.h>
+#include <spawn_int_abi.h>
#include <stdbool.h>
/* Data structure to contain the action information. */
@@ -32,6 +33,7 @@ struct __spawn_action
spawn_do_open,
spawn_do_chdir,
spawn_do_fchdir,
+ spawn_do_closefrom,
} tag;
union
@@ -60,6 +62,10 @@ struct __spawn_action
{
int fd;
} fchdir_action;
+ struct
+ {
+ int from;
+ } closefrom_action;
} action;
};
new file mode 100644
@@ -0,0 +1,27 @@
+/* Internal ABI specific for posix_spawn functionality. Generic version.
+ Copyright (C) 2020 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/>. */
+
+#ifndef _SPAWN_INT_ABI_H
+#define _SPAWN_INT_ABI_H
+
+/* The closefrom file actions requires either a syscall or an arch-specific
+ way to interact over all file descriptors and act uppon them (such
+ /proc/self/fd on Linux). */
+#define __SPAWN_SUPPOR_CLOSEFROM 0
+
+#endif /* _SPAWN_INT_H */
new file mode 100644
@@ -0,0 +1,279 @@
+/* Tests for posix_spawn signal handling.
+ Copyright (C) 2020 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 <stdio.h>
+#include <stdlib.h>
+#include <getopt.h>
+#include <spawn.h>
+#include <fcntl.h>
+#include <sys/wait.h>
+#include <dirent.h>
+#include <stdbool.h>
+#include <errno.h>
+#include <limits.h>
+
+#include <support/check.h>
+#include <support/xunistd.h>
+#include <support/support.h>
+
+#include <arch-fd_to_filename.h>
+#include <array_length.h>
+
+/* Nonzero if the program gets called via `exec'. */
+static int restart;
+
+/* Hold the four initial argument used to respawn the process. */
+static char *initial_argv[7];
+
+#define CMDLINE_OPTIONS \
+ { "restart", no_argument, &restart, 1 },
+
+enum
+{
+ maximum_fd = 100,
+ half_fd = maximum_fd / 2,
+};
+static int fds[maximum_fd + 1];
+
+
+/* Called on process re-execution. */
+_Noreturn static void
+handle_restart (int argc, char *argv[])
+{
+ size_t nfds = argc > 1 ? argc - 1 : 0;
+ struct fd_t
+ {
+ int fd;
+ _Bool found;
+ } *fds = xmalloc (sizeof (struct fd_t) * nfds);
+ for (int i = 0; i < nfds; i++)
+ {
+ char *endptr;
+ long int fd = strtol (argv[i+1], &endptr, 10);
+ if (*endptr != '\0' || fd < 0 || fd > INT_MAX)
+ FAIL_EXIT1 ("readdir: invalid file descriptor value: %s", argv[i]);
+ fds[i].fd = fd;
+ fds[i].found = false;
+ }
+
+ DIR *dirp = opendir (FD_TO_FILENAME_PREFIX);
+ if (dirp == NULL)
+ FAIL_EXIT1 ("opendir (\"" FD_TO_FILENAME_PREFIX "\"): %m");
+
+ while (true)
+ {
+ errno = 0;
+ struct dirent64 *e = readdir64 (dirp);
+ if (e == NULL)
+ {
+ if (errno != 0)
+ FAIL_EXIT1 ("readdir: %m");
+ break;
+ }
+
+ if (e->d_name[0] == '.')
+ continue;
+
+ char *endptr;
+ long int fd = strtol (e->d_name, &endptr, 10);
+ if (*endptr != '\0' || fd < 0 || fd > INT_MAX)
+ FAIL_EXIT1 ("readdir: invalid file descriptor name: /proc/self/fd/%s",
+ e->d_name);
+
+ /* Skip the descriptor which is used to enumerate the descriptors. */
+ if (fd == dirfd (dirp)
+ || fd == STDIN_FILENO
+ || fd == STDOUT_FILENO
+ || fd == STDERR_FILENO)
+ continue;
+
+ bool found = false;
+ for (int i = 0; i < nfds; i++)
+ if (fds[i].fd == fd)
+ fds[i].found = found = true;
+
+ if (!found)
+ FAIL_EXIT1 ("unexpected open file descriptor: %ld", fd);
+ }
+ closedir (dirp);
+
+ for (int i = 0; i < nfds; i++)
+ if (!fds[i].found)
+ FAIL_EXIT1 ("file descriptor %d not closed", fds[i].fd);
+
+ free (fds);
+
+ exit (EXIT_SUCCESS);
+}
+
+static void
+spawn_closefrom_test (posix_spawn_file_actions_t *fa, int lowfd,
+ int *extrafds, size_t nextrafds)
+{
+ /* 6 elements from initial_argv (path to ld.so, '--library-path', the
+ path', application name', '--direct', and '--restart'), up to
+ 2 * maximum_fd arguments (the expected open file descriptors), plus
+ NULL. */
+ enum { argv_size = array_length (initial_argv) + 2 * maximum_fd + 1 };
+ char *args[argv_size];
+ int argc = 0;
+
+ for (char **arg = initial_argv; *arg != NULL; arg++)
+ args[argc++] = *arg;
+
+ for (int i = 0; i < lowfd; i++)
+ args[argc++] = xasprintf ("%d", fds[i]);
+
+ for (int i = 0; i < nextrafds; i++)
+ args[argc++] = xasprintf ("%d", extrafds[i]);
+
+ args[argc] = NULL;
+ TEST_VERIFY (argc < argv_size);
+
+ pid_t pid;
+ int status;
+
+ TEST_COMPARE (posix_spawn (&pid, args[0], fa, NULL, args, environ), 0);
+ TEST_COMPARE (xwaitpid (pid, &status, 0), pid);
+ TEST_VERIFY (WIFEXITED (status));
+ TEST_VERIFY (!WIFSIGNALED (status));
+ TEST_COMPARE (WEXITSTATUS (status), 0);
+}
+
+static void
+do_test_closefrom (void)
+{
+ for (int i = 0; i < array_length (fds); i++)
+ fds[i] = xopen ("/dev/null", O_WRONLY, 0);
+
+ /* Close half of the descriptors and check result. */
+ {
+ posix_spawn_file_actions_t fa;
+ TEST_COMPARE (posix_spawn_file_actions_init (&fa), 0);
+
+ int ret = posix_spawn_file_actions_addclosefrom_np (&fa, fds[half_fd]);
+ if (ret == -1 && errno == EINVAL)
+ /* Hurd currently does not support closefrom fileaction. */
+ FAIL_UNSUPPORTED ("posix_spawn_file_actions_addclosefrom_np unsupported");
+ TEST_COMPARE (ret, 0);
+
+ spawn_closefrom_test (&fa, half_fd, NULL, 0);
+
+ TEST_COMPARE (posix_spawn_file_actions_destroy (&fa), 0);
+ }
+
+ /* Create some gaps, close up to a threshold, and check result. */
+ xclose (57);
+ xclose (78);
+ xclose (81);
+ xclose (82);
+ xclose (84);
+ xclose (90);
+
+ {
+ posix_spawn_file_actions_t fa;
+ TEST_COMPARE (posix_spawn_file_actions_init (&fa), 0);
+
+ TEST_COMPARE (posix_spawn_file_actions_addclosefrom_np (&fa,
+ fds[half_fd]),
+ 0);
+
+ spawn_closefrom_test (&fa, half_fd, NULL, 0);
+
+ TEST_COMPARE (posix_spawn_file_actions_destroy (&fa), 0);
+ }
+
+ /* Close the remmaining but the last one. */
+ {
+ posix_spawn_file_actions_t fa;
+ TEST_COMPARE (posix_spawn_file_actions_init (&fa), 0);
+
+ TEST_COMPARE (posix_spawn_file_actions_addclosefrom_np (&fa, fds[1]), 0);
+
+ spawn_closefrom_test (&fa, 1, NULL, 0);
+
+ TEST_COMPARE (posix_spawn_file_actions_destroy (&fa), 0);
+ }
+
+ /* Close everything. */
+ {
+ posix_spawn_file_actions_t fa;
+ TEST_COMPARE (posix_spawn_file_actions_init (&fa), 0);
+
+ TEST_COMPARE (posix_spawn_file_actions_addclosefrom_np (&fa, fds[0]), 0);
+
+ spawn_closefrom_test (&fa, 0, NULL, 0);
+
+ TEST_COMPARE (posix_spawn_file_actions_destroy (&fa), 0);
+ }
+
+ /* Close a range and add some file actions. */
+ {
+ posix_spawn_file_actions_t fa;
+ TEST_COMPARE (posix_spawn_file_actions_init (&fa), 0);
+
+ TEST_COMPARE (posix_spawn_file_actions_addclosefrom_np (&fa, fds[1]), 0);
+ TEST_COMPARE (posix_spawn_file_actions_addopen (&fa, fds[0], "/dev/null",
+ 0666, O_RDONLY), 0);
+ TEST_COMPARE (posix_spawn_file_actions_adddup2 (&fa, fds[0], fds[1]), 0);
+ TEST_COMPARE (posix_spawn_file_actions_addopen (&fa, fds[0], "/dev/null",
+ 0666, O_RDONLY), 0);
+
+ spawn_closefrom_test (&fa, 0, (int[]){fds[0], fds[1]}, 2);
+
+ TEST_COMPARE (posix_spawn_file_actions_destroy (&fa), 0);
+ }
+}
+
+
+static int
+do_test (int argc, char *argv[])
+{
+ /* We must have either:
+
+ - one or four parameters if called initially:
+ + argv[1]: path for ld.so optional
+ + argv[2]: "--library-path" optional
+ + argv[3]: the library path optional
+ + argv[4]: the application name
+
+ - six parameters left if called through re-execution:
+ + argv[1]: the application name
+ + argv[2]: first expected open file descriptor
+ + argv[n]: last expected open file descritptor
+
+ * When built with --enable-hardcoded-path-in-tests or issued without
+ using the loader directly. */
+
+ if (restart)
+ handle_restart (argc, argv);
+
+ initial_argv[0] = argv[1]; /* path for ld.so */
+ initial_argv[1] = argv[2]; /* "--library-path" */
+ initial_argv[2] = argv[3]; /* the library path */
+ initial_argv[3] = argv[4]; /* the application name */
+ initial_argv[4] = (char *) "--direct";
+ initial_argv[5] = (char *) "--restart";
+
+ do_test_closefrom ();
+
+ return 0;
+}
+
+#define TEST_FUNCTION_ARGV do_test
+#include <support/test-driver.c>
new file mode 100644
@@ -0,0 +1,24 @@
+/* Internal ABI specific for posix_spawn functionality. Generic version.
+ Copyright (C) 2020 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/>. */
+
+#ifndef _SPAWN_INT_ABI_H
+#define _SPAWN_INT_ABI_H
+
+#define __SPAWN_SUPPORT_CLOSEFROM 0
+
+#endif /* _SPAWN_INT_H */
@@ -2201,6 +2201,7 @@ GLIBC_2.33 lstat64 F
GLIBC_2.33 mallinfo2 F
GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
+GLIBC_2.33 posix_spawn_file_actions_addclosefrom_np F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.4 __confstr_chk F
@@ -600,6 +600,10 @@ __spawni (pid_t *pid, const char *file,
case spawn_do_fchdir:
err = child_fchdir (action->action.fchdir_action.fd);
break;
+
+ case spawn_do_closefrom:
+ err = EINVAL;
+ break;
}
if (err)
@@ -231,6 +231,10 @@ __spawni_child (void *arguments)
if (__fchdir (action->action.fchdir_action.fd) != 0)
goto fail;
break;
+
+ case spawn_do_closefrom:
+ __set_errno (EINVAL);
+ goto fail;
}
}
}
@@ -2171,5 +2171,6 @@ GLIBC_2.33 lstat64 F
GLIBC_2.33 mallinfo2 F
GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
+GLIBC_2.33 posix_spawn_file_actions_addclosefrom_np F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
@@ -2253,6 +2253,7 @@ GLIBC_2.33 lstat64 F
GLIBC_2.33 mallinfo2 F
GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
+GLIBC_2.33 posix_spawn_file_actions_addclosefrom_np F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.4 _IO_fprintf F
@@ -1931,5 +1931,6 @@ GLIBC_2.33 lstat64 F
GLIBC_2.33 mallinfo2 F
GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
+GLIBC_2.33 posix_spawn_file_actions_addclosefrom_np F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
@@ -154,6 +154,7 @@ GLIBC_2.33 lstat64 F
GLIBC_2.33 mallinfo2 F
GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
+GLIBC_2.33 posix_spawn_file_actions_addclosefrom_np F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.4 _Exit F
@@ -152,6 +152,7 @@ GLIBC_2.33 lstat64 F
GLIBC_2.33 mallinfo2 F
GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
+GLIBC_2.33 posix_spawn_file_actions_addclosefrom_np F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.4 _Exit F
@@ -2115,5 +2115,6 @@ GLIBC_2.33 lstat64 F
GLIBC_2.33 mallinfo2 F
GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
+GLIBC_2.33 posix_spawn_file_actions_addclosefrom_np F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
@@ -2074,6 +2074,7 @@ GLIBC_2.33 lstat64 F
GLIBC_2.33 mallinfo2 F
GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
+GLIBC_2.33 posix_spawn_file_actions_addclosefrom_np F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.4 __confstr_chk F
@@ -2240,6 +2240,7 @@ GLIBC_2.33 lstat64 F
GLIBC_2.33 mallinfo2 F
GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
+GLIBC_2.33 posix_spawn_file_actions_addclosefrom_np F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.4 __confstr_chk F
@@ -2106,6 +2106,7 @@ GLIBC_2.33 lstat64 F
GLIBC_2.33 mallinfo2 F
GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
+GLIBC_2.33 posix_spawn_file_actions_addclosefrom_np F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.4 __confstr_chk F
@@ -155,6 +155,7 @@ GLIBC_2.33 lstat64 F
GLIBC_2.33 mallinfo2 F
GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
+GLIBC_2.33 posix_spawn_file_actions_addclosefrom_np F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.4 _Exit F
@@ -2186,6 +2186,7 @@ GLIBC_2.33 lstat64 F
GLIBC_2.33 mallinfo2 F
GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
+GLIBC_2.33 posix_spawn_file_actions_addclosefrom_np F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.4 __confstr_chk F
@@ -2166,5 +2166,6 @@ GLIBC_2.33 lstat64 F
GLIBC_2.33 mallinfo2 F
GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
+GLIBC_2.33 posix_spawn_file_actions_addclosefrom_np F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
@@ -2162,5 +2162,6 @@ GLIBC_2.33 lstat64 F
GLIBC_2.33 mallinfo2 F
GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
+GLIBC_2.33 posix_spawn_file_actions_addclosefrom_np F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
@@ -2157,6 +2157,7 @@ GLIBC_2.33 lstat64 F
GLIBC_2.33 mallinfo2 F
GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
+GLIBC_2.33 posix_spawn_file_actions_addclosefrom_np F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.4 __confstr_chk F
@@ -2154,6 +2154,7 @@ GLIBC_2.33 lstat64 F
GLIBC_2.33 mallinfo2 F
GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
+GLIBC_2.33 posix_spawn_file_actions_addclosefrom_np F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.4 __confstr_chk F
@@ -2163,6 +2163,7 @@ GLIBC_2.33 lstat64 F
GLIBC_2.33 mallinfo2 F
GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
+GLIBC_2.33 posix_spawn_file_actions_addclosefrom_np F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.4 __confstr_chk F
@@ -2157,6 +2157,7 @@ GLIBC_2.33 lstat64 F
GLIBC_2.33 mallinfo2 F
GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
+GLIBC_2.33 posix_spawn_file_actions_addclosefrom_np F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.4 __confstr_chk F
@@ -2204,5 +2204,6 @@ GLIBC_2.33 lstat64 F
GLIBC_2.33 mallinfo2 F
GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
+GLIBC_2.33 posix_spawn_file_actions_addclosefrom_np F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
@@ -2213,6 +2213,7 @@ GLIBC_2.33 lstat64 F
GLIBC_2.33 mallinfo2 F
GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
+GLIBC_2.33 posix_spawn_file_actions_addclosefrom_np F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.4 _IO_fprintf F
@@ -2245,6 +2245,7 @@ GLIBC_2.33 lstat64 F
GLIBC_2.33 mallinfo2 F
GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
+GLIBC_2.33 posix_spawn_file_actions_addclosefrom_np F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.4 _IO_fprintf F
@@ -2076,6 +2076,7 @@ GLIBC_2.33 lstat64 F
GLIBC_2.33 mallinfo2 F
GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
+GLIBC_2.33 posix_spawn_file_actions_addclosefrom_np F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.4 _IO_fprintf F
@@ -2366,5 +2366,6 @@ GLIBC_2.33 lstat64 F
GLIBC_2.33 mallinfo2 F
GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
+GLIBC_2.33 posix_spawn_file_actions_addclosefrom_np F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
@@ -1304,6 +1304,7 @@ GLIBC_2.33 posix_openpt F
GLIBC_2.33 posix_spawn F
GLIBC_2.33 posix_spawn_file_actions_addchdir_np F
GLIBC_2.33 posix_spawn_file_actions_addclose F
+GLIBC_2.33 posix_spawn_file_actions_addclosefrom_np F
GLIBC_2.33 posix_spawn_file_actions_adddup2 F
GLIBC_2.33 posix_spawn_file_actions_addfchdir_np F
GLIBC_2.33 posix_spawn_file_actions_addopen F
@@ -2133,5 +2133,6 @@ GLIBC_2.33 lstat64 F
GLIBC_2.33 mallinfo2 F
GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
+GLIBC_2.33 posix_spawn_file_actions_addclosefrom_np F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
@@ -2211,6 +2211,7 @@ GLIBC_2.33 lstat64 F
GLIBC_2.33 mallinfo2 F
GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
+GLIBC_2.33 posix_spawn_file_actions_addclosefrom_np F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.4 _IO_fprintf F
@@ -2112,6 +2112,7 @@ GLIBC_2.33 lstat64 F
GLIBC_2.33 mallinfo2 F
GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
+GLIBC_2.33 posix_spawn_file_actions_addclosefrom_np F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.4 _IO_fprintf F
@@ -2080,6 +2080,7 @@ GLIBC_2.33 lstat64 F
GLIBC_2.33 mallinfo2 F
GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
+GLIBC_2.33 posix_spawn_file_actions_addclosefrom_np F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.4 __confstr_chk F
@@ -2078,6 +2078,7 @@ GLIBC_2.33 lstat64 F
GLIBC_2.33 mallinfo2 F
GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
+GLIBC_2.33 posix_spawn_file_actions_addclosefrom_np F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.4 __confstr_chk F
@@ -2202,6 +2202,7 @@ GLIBC_2.33 lstat64 F
GLIBC_2.33 mallinfo2 F
GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
+GLIBC_2.33 posix_spawn_file_actions_addclosefrom_np F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.4 _IO_fprintf F
@@ -2129,6 +2129,7 @@ GLIBC_2.33 lstat64 F
GLIBC_2.33 mallinfo2 F
GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
+GLIBC_2.33 posix_spawn_file_actions_addclosefrom_np F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.4 __confstr_chk F
new file mode 100644
@@ -0,0 +1,25 @@
+/* Internal ABI specific for posix_spawn functionality. Linux version.
+ Copyright (C) 2020 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/>. */
+
+#ifndef _SPAWN_INT_ABI_H
+#define _SPAWN_INT_ABI_H
+
+/* spawni.c implements closefrom by interacting over /proc/self/fd. */
+#define __SPAWN_SUPPORT_CLOSEFROM 1
+
+#endif /* _SPAWN_INT_H */
@@ -16,22 +16,17 @@
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
-#include <spawn.h>
-#include <fcntl.h>
-#include <paths.h>
-#include <string.h>
-#include <sys/resource.h>
-#include <sys/wait.h>
-#include <sys/param.h>
-#include <sys/mman.h>
-#include <not-cancel.h>
+#include <arch-fd_to_filename.h>
+#include <internal-signals.h>
+#include <ldsodefs.h>
#include <local-setxid.h>
+#include <not-cancel.h>
+#include <paths.h>
#include <shlib-compat.h>
-#include <nptl/pthreadP.h>
-#include <dl-sysdep.h>
-#include <libc-pointer-arith.h>
-#include <ldsodefs.h>
-#include "spawn_int.h"
+#include <spawn.h>
+#include <spawn_int.h>
+#include <sysdep.h>
+#include <sys/resource.h>
/* The Linux implementation of posix_spawn{p} uses the clone syscall directly
with CLONE_VM and CLONE_VFORK flags and an allocated stack. The new stack
@@ -280,6 +275,15 @@ __spawni_child (void *arguments)
if (__fchdir (action->action.fchdir_action.fd) != 0)
goto fail;
break;
+
+ case spawn_do_closefrom:
+ {
+ int lowfd = action->action.closefrom_action.from;
+ /* close_range is a cancellation entrypoint. */
+ int r = INLINE_SYSCALL_CALL (close_range, lowfd, ~0U, 0);
+ if (r != 0 && !__closefrom_fallback (lowfd))
+ goto fail;
+ } break;
}
}
}
@@ -344,7 +348,9 @@ __spawnix (pid_t * pid, const char *file,
/* We need at least a few pages in case the compiler's stack checking is
enabled. In some configs, it is known to use at least 24KiB. We use
32KiB to be "safe" from anything the compiler might do. Besides, the
- extra pages won't actually be allocated unless they get used. */
+ extra pages won't actually be allocated unless they get used.
+ It also acts the slack for spawn_closefrom (including MIPS64 getdents64
+ where it might use about 1k extra stack space. */
argv_size += (32 * 1024);
size_t stack_size = ALIGN_UP (argv_size, GLRO(dl_pagesize));
void *stack = __mmap (NULL, stack_size, prot,
@@ -2087,6 +2087,7 @@ GLIBC_2.33 lstat64 F
GLIBC_2.33 mallinfo2 F
GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
+GLIBC_2.33 posix_spawn_file_actions_addclosefrom_np F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.4 __confstr_chk F
@@ -2184,5 +2184,6 @@ GLIBC_2.33 lstat64 F
GLIBC_2.33 mallinfo2 F
GLIBC_2.33 mknod F
GLIBC_2.33 mknodat F
+GLIBC_2.33 posix_spawn_file_actions_addclosefrom_np F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F