git: a18ddf775744 - main - posix_spawn: add closefrom non-portable action

The branch main has been updated by kib:

URL: https://cgit.FreeBSD.org/src/commit/?id=a18ddf775744f31a844fd01fbe90207f7c5e706d

commit a18ddf775744f31a844fd01fbe90207f7c5e706d
Author:     Konstantin Belousov <kib@FreeBSD.org>
AuthorDate: 2021-11-27 22:54:16 +0000
Commit:     Konstantin Belousov <kib@FreeBSD.org>
CommitDate: 2021-11-30 01:43:54 +0000

    posix_spawn: add closefrom non-portable action
    
    Namely posix_spawn_file_actions_addclosefrom_np, in the form it is
    provided by glibc.
    
    Reviewed by:    kevans, ngie (previous version)
    Sponsored by:   The FreeBSD Foundation
    MFC after:      1 week
    Differential revision:  https://reviews.freebsd.org/D33143
---
 include/spawn.h            |  2 ++
 lib/libc/gen/Symbol.map    |  1 +
 lib/libc/gen/posix_spawn.c | 25 +++++++++++++++++++++++++
 3 files changed, 28 insertions(+)

diff --git a/include/spawn.h b/include/spawn.h
index 4ba3998a3e90..53373a6c8db8 100644
--- a/include/spawn.h
+++ b/include/spawn.h
@@ -92,6 +92,8 @@ int posix_spawn_file_actions_addchdir_np(posix_spawn_file_actions_t *
     __restrict, const char * __restrict);
 int posix_spawn_file_actions_addfchdir_np(posix_spawn_file_actions_t *,
     int);
+int posix_spawn_file_actions_addclosefrom_np(posix_spawn_file_actions_t *,
+    int);
 #endif
 
 /*
diff --git a/lib/libc/gen/Symbol.map b/lib/libc/gen/Symbol.map
index bae2463d99d4..5554c32ab4f2 100644
--- a/lib/libc/gen/Symbol.map
+++ b/lib/libc/gen/Symbol.map
@@ -437,6 +437,7 @@ FBSD_1.6 {
 
 FBSD_1.7 {
 	 posix_spawn_file_actions_addchdir_np;
+	 posix_spawn_file_actions_addclosefrom_np;
 	 posix_spawn_file_actions_addfchdir_np;
 	 sched_getaffinity;
 	 sched_setaffinity;
diff --git a/lib/libc/gen/posix_spawn.c b/lib/libc/gen/posix_spawn.c
index 00d1724a6515..909db9a60a02 100644
--- a/lib/libc/gen/posix_spawn.c
+++ b/lib/libc/gen/posix_spawn.c
@@ -68,6 +68,7 @@ typedef struct __posix_spawn_file_actions_entry {
 		FAE_CLOSE,
 		FAE_CHDIR,
 		FAE_FCHDIR,
+		FAE_CLOSEFROM,
 	} fae_action;
 
 	int fae_fildes;
@@ -190,6 +191,9 @@ process_file_actions_entry(posix_spawn_file_actions_entry_t *fae)
 		if (fchdir(fae->fae_fildes) != 0)
 			return (errno);
 		break;
+	case FAE_CLOSEFROM:
+		closefrom(fae->fae_fildes);
+		break;
 	}
 	return (0);
 }
@@ -533,6 +537,27 @@ posix_spawn_file_actions_addfchdir_np(posix_spawn_file_actions_t *__restrict fa,
 	return (0);
 }
 
+int
+posix_spawn_file_actions_addclosefrom_np (posix_spawn_file_actions_t *
+    __restrict fa, int from)
+{
+	posix_spawn_file_actions_entry_t *fae;
+
+	if (from < 0)
+		return (EBADF);
+
+	/* Allocate object */
+	fae = malloc(sizeof(posix_spawn_file_actions_entry_t));
+	if (fae == NULL)
+		return (errno);
+
+	fae->fae_action = FAE_CLOSEFROM;
+	fae->fae_fildes = from;
+
+	STAILQ_INSERT_TAIL(&(*fa)->fa_list, fae, fae_list);
+	return (0);
+}
+
 /*
  * Spawn attributes
  */