io: Add closefrom [BZ #10353]

The function closes all open file descriptors greater than or equal to
input argument.  Negative values are clamped to 0, i.e, it will close
all file descriptors.

As indicated by the bug report, this is a common symbol provided by
different systems (Solaris, OpenBSD, NetBSD, FreeBSD) and, although
its has inherent issues with not taking in consideration internal libc
file descriptors (such as syslog), this is also a common feature used
in multiple projects [1][2][3][4][5].

The Linux fallback implementation iterates over /proc and close all
file descriptors sequentially.  Although it was raised the questioning
whether getdents on /proc/self/fd might return disjointed entries
when file descriptor are closed; it does not seems the case on my
testing on multiple kernel (v4.18, v5.4, v5.9) and the same strategy
is used on different projects [1][2][3][5].

Also, the interface is set a fail-safe meaning that a failure in the
fallback results in a process abort.

Checked on x86_64-linux-gnu and i686-linux-gnu on kernel 5.11 and 4.15.

[1] 5238e95759/src/basic/fd-util.c (L217)
[2] ddf4b77e11/src/lxc/start.c (L236)
[3] 9e4f2f3a6b/Modules/_posixsubprocess.c (L220)
[4] 5f47c0613e/src/libstd/sys/unix/process2.rs (L303-L308)
[5] https://github.com/openjdk/jdk/blob/master/src/java.base/unix/native/libjava/childproc.c#L82

NEWS

@@ -63,6 +63,10 @@ Major new features:
 * On Linux, the close_range function has been added.  It allows efficiently
   closing a range of file descriptors on recent kernels (version 5.9).
 
+* The function closefrom has been added.  It closes all file descriptors
+  greater than given integer.  This function is a GNU extension, although it
+  also present in other systems.
+
 Deprecated and removed features, and other changes affecting compatibility:
 
 * The function pthread_mutex_consistent_np has been deprecated; programs

include/unistd.h

@@ -158,6 +158,7 @@ extern int __brk (void *__addr) attribute_hidden;
 extern int __close (int __fd);
 libc_hidden_proto (__close)
 extern int __libc_close (int __fd);
+extern _Bool __closefrom_fallback (int __lowfd) attribute_hidden;
 extern ssize_t __read (int __fd, void *__buf, size_t __nbytes);
 libc_hidden_proto (__read)
 extern ssize_t __write (int __fd, const void *__buf, size_t __n);

io/Makefile

@@ -56,7 +56,8 @@ routines :=								\
 	sendfile sendfile64 copy_file_range 				\
 	utimensat futimens file_change_detection			\
 	fts64-time64							\
-	ftw64-time64
+	ftw64-time64							\
+	closefrom
 
 others		:= pwd
 test-srcs	:= ftwtest ftwtest-time64
@@ -77,6 +78,7 @@ tests		:= test-utime test-stat test-stat2 test-lfs tst-getcwd \
 		   tst-lutimes \
 		   tst-futimens \
 		   tst-utimensat \
+		   tst-closefrom \
 
 tests-time64 := \
   tst-futimens-time64 \

io/Versions

@@ -137,6 +137,9 @@ libc {
     stat; stat64; fstat; fstat64; lstat; lstat64; fstatat; fstatat64;
     mknod; mknodat;
   }
+  GLIBC_2.34 {
+    closefrom;
+  }
   GLIBC_PRIVATE {
     __libc_fcntl64;
     __fcntl_nocancel;

io/closefrom.c

@@ -0,0 +1,34 @@
+/* Close a range of file descriptors.
+   Copyright (C) 2021 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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <not-cancel.h>
+
+void
+__closefrom (int lowfd)
+{
+  int maxfd = __getdtablesize ();
+  if (maxfd == -1)
+    __fortify_fail ("closefrom failed to get the file descriptor table size");
+
+  for (int i = 0; i < maxfd; i++)
+    if (i >= lowfd)
+      __close_nocancel_nostatus (i);
+}
+weak_alias (__closefrom, closefrom)

io/tst-closefrom.c

@@ -0,0 +1,152 @@
+/* Smoke test for the closefrom.
+   Copyright (C) 2021 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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/resource.h>
+#include <unistd.h>
+
+#include <support/check.h>
+#include <support/descriptors.h>
+#include <support/xunistd.h>
+
+#include <array_length.h>
+
+#define NFDS 100
+
+static int
+open_multiple_temp_files (void)
+{
+  /* Check if the temporary file descriptor has no no gaps.  */
+  int lowfd = xopen ("/dev/null", O_RDONLY, 0600);
+  for (int i = 1; i <= NFDS; i++)
+    TEST_COMPARE (xopen ("/dev/null", O_RDONLY, 0600), lowfd + i);
+  return lowfd;
+}
+
+static int
+closefrom_test (void)
+{
+  struct support_descriptors *descrs = support_descriptors_list ();
+
+  int lowfd = open_multiple_temp_files ();
+
+  const int maximum_fd = lowfd + NFDS;
+  const int half_fd = lowfd + NFDS / 2;
+  const int gap = maximum_fd / 4;
+
+  /* Close half of the descriptors and check result.  */
+  closefrom (half_fd);
+
+  for (int i = half_fd; i <= maximum_fd; i++)
+    {
+      TEST_COMPARE (fcntl (i, F_GETFL), -1);
+      TEST_COMPARE (errno, EBADF);
+    }
+  for (int i = 0; i < half_fd; i++)
+    TEST_VERIFY (fcntl (i, F_GETFL) > -1);
+
+  /* Create some gaps, close up to a threshold, and check result.  */
+  xclose (lowfd + 35);
+  xclose (lowfd + 38);
+  xclose (lowfd + 42);
+  xclose (lowfd + 46);
+
+  /* Close half of the descriptors and check result.  */
+  closefrom (gap);
+  for (int i = gap + 1; i < maximum_fd; i++)
+    {
+      TEST_COMPARE (fcntl (i, F_GETFL), -1);
+      TEST_COMPARE (errno, EBADF);
+    }
+  for (int i = 0; i < gap; i++)
+    TEST_VERIFY (fcntl (i, F_GETFL) > -1);
+
+  /* Close the remmaining but the last one.  */
+  closefrom (lowfd + 1);
+  for (int i = lowfd + 1; i <= maximum_fd; i++)
+    {
+      TEST_COMPARE (fcntl (i, F_GETFL), -1);
+      TEST_COMPARE (errno, EBADF);
+    }
+  TEST_VERIFY (fcntl (lowfd, F_GETFL) > -1);
+
+  /* Close the last one.  */
+  closefrom (lowfd);
+  TEST_COMPARE (fcntl (lowfd, F_GETFL), -1);
+  TEST_COMPARE (errno, EBADF);
+
+  /* Double check by check the /proc.  */
+  support_descriptors_check (descrs);
+  support_descriptors_free (descrs);
+
+  return 0;
+}
+
+/* Check if closefrom works even when no new file descriptors can be
+   created.  */
+static int
+closefrom_test_file_desc_limit (void)
+{
+  int max_fd = NFDS;
+  {
+    struct rlimit rl;
+    if (getrlimit (RLIMIT_NOFILE, &rl) == -1)
+      FAIL_EXIT1 ("getrlimit (RLIMIT_NOFILE): %m");
+
+    max_fd = (rl.rlim_cur < max_fd ? rl.rlim_cur : max_fd);
+    rl.rlim_cur = max_fd;
+
+    if (setrlimit (RLIMIT_NOFILE, &rl) == 1)
+      FAIL_EXIT1 ("setrlimit (RLIMIT_NOFILE): %m");
+  }
+
+  /* Exhauste the file descriptor limit.  */
+  int lowfd = xopen ("/dev/null", O_RDONLY, 0600);
+  for (;;)
+    {
+      int fd = open ("/dev/null", O_RDONLY, 0600);
+      if (fd == -1)
+	{
+	  if (errno != EMFILE)
+	    FAIL_EXIT1 ("open: %m");
+	  break;
+	}
+      TEST_VERIFY_EXIT (fd < max_fd);
+    }
+
+  closefrom (lowfd);
+  for (int i = lowfd; i < NFDS; i++)
+    {
+      TEST_COMPARE (fcntl (i, F_GETFL), -1);
+      TEST_COMPARE (errno, EBADF);
+    }
+
+  return 0;
+}
+
+static int
+do_test (void)
+{
+  closefrom_test ();
+  closefrom_test_file_desc_limit ();
+
+  return 0;
+}
+
+#include <support/test-driver.c>

manual/llio.texi

@@ -334,6 +334,16 @@ The kernel does not implement the required functionality.
 @end table
 @end deftypefun
 
+@deftypefun void closefrom (int @var{lowfd})
+@standards{GNU, unistd.h}
+@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{@acsfd{}}}
+
+The function @code{closefrom} closes all file descriptors larger than or equal
+to @var{lowfd} then @var{lowfd}.  This function is similar to calling
+@code{close} for all open file descriptors not less than @var{lowfd}.
+
+Already closed file descriptors are ignored.
+@end deftypefun
 
 @node I/O Primitives
 @section Input and Output Primitives

posix/unistd.h

@@ -357,6 +357,12 @@ extern __off64_t lseek64 (int __fd, __off64_t __offset, int __whence)
    __THROW.  */
 extern int close (int __fd);
 
+#ifdef __USE_MISC
+/* Close all open file descriptors greater than or equal to LOWFD.
+   Negative LOWFD is clamped to 0.  */
+extern void closefrom (int __lowfd) __THROW;
+#endif
+
 /* Read NBYTES into BUF from FD.  Return the
    number read, -1 for errors or 0 for EOF.
 

sysdeps/mach/hurd/i386/libc.abilist

@@ -2225,6 +2225,7 @@ GLIBC_2.34 _Fork F
 GLIBC_2.34 __isnanf128 F
 GLIBC_2.34 __libc_start_main F
 GLIBC_2.34 _hurd_libc_proc_init F
+GLIBC_2.34 closefrom F
 GLIBC_2.34 dladdr F
 GLIBC_2.34 dladdr1 F
 GLIBC_2.34 dlclose F

sysdeps/unix/sysv/linux/Makefile

@@ -64,7 +64,8 @@ sysdep_routines += adjtimex clone umount umount2 readahead sysctl \
 		   pselect32 \
 		   xstat fxstat lxstat xstat64 fxstat64 lxstat64 \
 		   fxstatat fxstatat64 \
-		   xmknod xmknodat convert_scm_timestamps
+		   xmknod xmknodat convert_scm_timestamps \
+		   closefrom_fallback
 
 CFLAGS-gethostid.c = -fexceptions
 CFLAGS-tee.c = -fexceptions -fasynchronous-unwind-tables

sysdeps/unix/sysv/linux/aarch64/libc.abilist

@@ -2408,6 +2408,7 @@ GLIBC_2.34 aio_write F
 GLIBC_2.34 aio_write64 F
 GLIBC_2.34 call_once F
 GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
 GLIBC_2.34 cnd_broadcast F
 GLIBC_2.34 cnd_destroy F
 GLIBC_2.34 cnd_init F

sysdeps/unix/sysv/linux/alpha/libc.abilist

@@ -2507,6 +2507,7 @@ GLIBC_2.34 aio_write F
 GLIBC_2.34 aio_write64 F
 GLIBC_2.34 call_once F
 GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
 GLIBC_2.34 cnd_broadcast F
 GLIBC_2.34 cnd_destroy F
 GLIBC_2.34 cnd_init F

sysdeps/unix/sysv/linux/arc/libc.abilist

@@ -2167,6 +2167,7 @@ GLIBC_2.34 aio_write F
 GLIBC_2.34 aio_write64 F
 GLIBC_2.34 call_once F
 GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
 GLIBC_2.34 cnd_broadcast F
 GLIBC_2.34 cnd_destroy F
 GLIBC_2.34 cnd_init F

sysdeps/unix/sysv/linux/arm/be/libc.abilist

@@ -301,6 +301,7 @@ GLIBC_2.34 aio_write F
 GLIBC_2.34 aio_write64 F
 GLIBC_2.34 call_once F
 GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
 GLIBC_2.34 cnd_broadcast F
 GLIBC_2.34 cnd_destroy F
 GLIBC_2.34 cnd_init F

sysdeps/unix/sysv/linux/arm/le/libc.abilist

@@ -298,6 +298,7 @@ GLIBC_2.34 aio_write F
 GLIBC_2.34 aio_write64 F
 GLIBC_2.34 call_once F
 GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
 GLIBC_2.34 cnd_broadcast F
 GLIBC_2.34 cnd_destroy F
 GLIBC_2.34 cnd_init F

sysdeps/unix/sysv/linux/closefrom.c

@@ -0,0 +1,35 @@
+/* Close a range of file descriptors.  Linux version.
+   Copyright (C) 2021 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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <stdio.h>
+#include <sys/param.h>
+#include <unistd.h>
+
+void
+__closefrom (int lowfd)
+{
+  int l = MAX (0, lowfd);
+
+  int r = __close_range (l, ~0U, 0);
+  if (r == 0)
+    return;
+
+  if (!__closefrom_fallback (l))
+    __fortify_fail ("closefrom failed to close a file descriptor");
+}
+weak_alias (__closefrom, closefrom)

sysdeps/unix/sysv/linux/closefrom_fallback.c

@@ -0,0 +1,97 @@
+/* Close a range of file descriptors.  Linux version.
+   Copyright (C) 2021 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
+   <https://www.gnu.org/licenses/>.  */
+
+#include <arch-fd_to_filename.h>
+#include <dirent.h>
+#include <not-cancel.h>
+#include <stdbool.h>
+
+/* Fallback code: iterates over /proc/self/fd, closing each file descriptor
+   that fall on the criteria.  */
+_Bool
+__closefrom_fallback (int from)
+{
+  bool ret = false;
+
+  int dirfd = __open_nocancel (FD_TO_FILENAME_PREFIX, O_RDONLY | O_DIRECTORY,
+                               0);
+  if (dirfd == -1)
+    {
+      /* The closefrom should work even when process can't open new files.  */
+      if (errno == ENOENT)
+        goto err;
+
+      for (int i = from; i < INT_MAX; i++)
+        {
+          int r = __close_nocancel (i);
+          if (r == 0 || (r == -1 && errno != EBADF))
+            break;
+        }
+
+      dirfd = __open_nocancel (FD_TO_FILENAME_PREFIX, O_RDONLY | O_DIRECTORY,
+                               0);
+      if (dirfd == -1)
+        goto err;
+    }
+
+  char buffer[1024];
+  while (true)
+    {
+      ssize_t ret = __getdents64 (dirfd, buffer, sizeof (buffer));
+      if (ret == -1)
+        goto err;
+      else if (ret == 0)
+        break;
+
+      /* If any file descriptor is closed it resets the /proc/self position
+         read again from the start (to obtain any possible kernel update).  */
+      bool closed = false;
+      char *begin = buffer, *end = buffer + ret;
+      while (begin != end)
+        {
+          unsigned short int d_reclen;
+          memcpy (&d_reclen, begin + offsetof (struct dirent64, d_reclen),
+                  sizeof (d_reclen));
+          const char *dname = begin + offsetof (struct dirent64, d_name);
+          begin += d_reclen;
+
+          if (dname[0] == '.')
+            continue;
+
+          int fd = 0;
+          for (const char *s = dname; (unsigned int) (*s) - '0' < 10; s++)
+            fd = 10 * fd + (*s - '0');
+
+          if (fd == dirfd || fd < from)
+            continue;
+
+          /* We ignore close errors because EBADF, EINTR, and EIO means the
+             descriptor has been released.  */
+          __close_nocancel (fd);
+          closed = true;
+        }
+
+      if (closed && __lseek (dirfd, 0, SEEK_SET) < 0)
+        goto err;
+    }
+
+  ret = true;
+err:
+  __close_nocancel (dirfd);
+  return ret;
+}

sysdeps/unix/sysv/linux/csky/libc.abilist

@@ -2433,6 +2433,7 @@ GLIBC_2.34 aio_write F
 GLIBC_2.34 aio_write64 F
 GLIBC_2.34 call_once F
 GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
 GLIBC_2.34 cnd_broadcast F
 GLIBC_2.34 cnd_destroy F
 GLIBC_2.34 cnd_init F

sysdeps/unix/sysv/linux/hppa/libc.abilist

@@ -2386,6 +2386,7 @@ GLIBC_2.34 aio_write F
 GLIBC_2.34 aio_write64 F
 GLIBC_2.34 call_once F
 GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
 GLIBC_2.34 cnd_broadcast F
 GLIBC_2.34 cnd_destroy F
 GLIBC_2.34 cnd_init F

sysdeps/unix/sysv/linux/i386/libc.abilist

@@ -2570,6 +2570,7 @@ GLIBC_2.34 aio_write F
 GLIBC_2.34 aio_write64 F
 GLIBC_2.34 call_once F
 GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
 GLIBC_2.34 cnd_broadcast F
 GLIBC_2.34 cnd_destroy F
 GLIBC_2.34 cnd_init F

sysdeps/unix/sysv/linux/ia64/libc.abilist

@@ -2345,6 +2345,7 @@ GLIBC_2.34 aio_write F
 GLIBC_2.34 aio_write64 F
 GLIBC_2.34 call_once F
 GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
 GLIBC_2.34 cnd_broadcast F
 GLIBC_2.34 cnd_destroy F
 GLIBC_2.34 cnd_init F

sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist

@@ -302,6 +302,7 @@ GLIBC_2.34 aio_write F
 GLIBC_2.34 aio_write64 F
 GLIBC_2.34 call_once F
 GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
 GLIBC_2.34 cnd_broadcast F
 GLIBC_2.34 cnd_destroy F
 GLIBC_2.34 cnd_init F

sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist

@@ -2513,6 +2513,7 @@ GLIBC_2.34 aio_write F
 GLIBC_2.34 aio_write64 F
 GLIBC_2.34 call_once F
 GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
 GLIBC_2.34 cnd_broadcast F
 GLIBC_2.34 cnd_destroy F
 GLIBC_2.34 cnd_init F

sysdeps/unix/sysv/linux/microblaze/be/libc.abilist

@@ -2484,6 +2484,7 @@ GLIBC_2.34 aio_write F
 GLIBC_2.34 aio_write64 F
 GLIBC_2.34 call_once F
 GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
 GLIBC_2.34 cnd_broadcast F
 GLIBC_2.34 cnd_destroy F
 GLIBC_2.34 cnd_init F

sysdeps/unix/sysv/linux/microblaze/le/libc.abilist

@@ -2481,6 +2481,7 @@ GLIBC_2.34 aio_write F
 GLIBC_2.34 aio_write64 F
 GLIBC_2.34 call_once F
 GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
 GLIBC_2.34 cnd_broadcast F
 GLIBC_2.34 cnd_destroy F
 GLIBC_2.34 cnd_init F

sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist

@@ -2478,6 +2478,7 @@ GLIBC_2.34 aio_write F
 GLIBC_2.34 aio_write64 F
 GLIBC_2.34 call_once F
 GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
 GLIBC_2.34 cnd_broadcast F
 GLIBC_2.34 cnd_destroy F
 GLIBC_2.34 cnd_init F

sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist

@@ -2476,6 +2476,7 @@ GLIBC_2.34 aio_write F
 GLIBC_2.34 aio_write64 F
 GLIBC_2.34 call_once F
 GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
 GLIBC_2.34 cnd_broadcast F
 GLIBC_2.34 cnd_destroy F
 GLIBC_2.34 cnd_init F

sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist

@@ -2484,6 +2484,7 @@ GLIBC_2.34 aio_write F
 GLIBC_2.34 aio_write64 F
 GLIBC_2.34 call_once F
 GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
 GLIBC_2.34 cnd_broadcast F
 GLIBC_2.34 cnd_destroy F
 GLIBC_2.34 cnd_init F

sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist

@@ -2396,6 +2396,7 @@ GLIBC_2.34 aio_write F
 GLIBC_2.34 aio_write64 F
 GLIBC_2.34 call_once F
 GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
 GLIBC_2.34 cnd_broadcast F
 GLIBC_2.34 cnd_destroy F
 GLIBC_2.34 cnd_init F

sysdeps/unix/sysv/linux/nios2/libc.abilist

@@ -2523,6 +2523,7 @@ GLIBC_2.34 aio_write F
 GLIBC_2.34 aio_write64 F
 GLIBC_2.34 call_once F
 GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
 GLIBC_2.34 cnd_broadcast F
 GLIBC_2.34 cnd_destroy F
 GLIBC_2.34 cnd_init F

sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist

@@ -2540,6 +2540,7 @@ GLIBC_2.34 aio_write F
 GLIBC_2.34 aio_write64 F
 GLIBC_2.34 call_once F
 GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
 GLIBC_2.34 cnd_broadcast F
 GLIBC_2.34 cnd_destroy F
 GLIBC_2.34 cnd_init F

sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist

@@ -2573,6 +2573,7 @@ GLIBC_2.34 aio_write F
 GLIBC_2.34 aio_write64 F
 GLIBC_2.34 call_once F
 GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
 GLIBC_2.34 cnd_broadcast F
 GLIBC_2.34 cnd_destroy F
 GLIBC_2.34 cnd_init F

sysdeps/unix/sysv/linux/powerpc/powerpc64/be/libc.abilist

@@ -2309,6 +2309,7 @@ GLIBC_2.34 aio_write F
 GLIBC_2.34 aio_write64 F
 GLIBC_2.34 call_once F
 GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
 GLIBC_2.34 cnd_broadcast F
 GLIBC_2.34 cnd_destroy F
 GLIBC_2.34 cnd_init F

sysdeps/unix/sysv/linux/powerpc/powerpc64/le/libc.abilist

@@ -2604,6 +2604,7 @@ GLIBC_2.34 aio_write F
 GLIBC_2.34 aio_write64 F
 GLIBC_2.34 call_once F
 GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
 GLIBC_2.34 cnd_broadcast F
 GLIBC_2.34 cnd_destroy F
 GLIBC_2.34 cnd_init F

sysdeps/unix/sysv/linux/riscv/rv32/libc.abilist

@@ -2169,6 +2169,7 @@ GLIBC_2.34 aio_write F
 GLIBC_2.34 aio_write64 F
 GLIBC_2.34 call_once F
 GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
 GLIBC_2.34 cnd_broadcast F
 GLIBC_2.34 cnd_destroy F
 GLIBC_2.34 cnd_init F

sysdeps/unix/sysv/linux/riscv/rv64/libc.abilist

@@ -2369,6 +2369,7 @@ GLIBC_2.34 aio_write F
 GLIBC_2.34 aio_write64 F
 GLIBC_2.34 call_once F
 GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
 GLIBC_2.34 cnd_broadcast F
 GLIBC_2.34 cnd_destroy F
 GLIBC_2.34 cnd_init F

sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist

@@ -2538,6 +2538,7 @@ GLIBC_2.34 aio_write F
 GLIBC_2.34 aio_write64 F
 GLIBC_2.34 call_once F
 GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
 GLIBC_2.34 cnd_broadcast F
 GLIBC_2.34 cnd_destroy F
 GLIBC_2.34 cnd_init F

sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist

@@ -2346,6 +2346,7 @@ GLIBC_2.34 aio_write F
 GLIBC_2.34 aio_write64 F
 GLIBC_2.34 call_once F
 GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
 GLIBC_2.34 cnd_broadcast F
 GLIBC_2.34 cnd_destroy F
 GLIBC_2.34 cnd_init F

sysdeps/unix/sysv/linux/sh/be/libc.abilist

@@ -2393,6 +2393,7 @@ GLIBC_2.34 aio_write F
 GLIBC_2.34 aio_write64 F
 GLIBC_2.34 call_once F
 GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
 GLIBC_2.34 cnd_broadcast F
 GLIBC_2.34 cnd_destroy F
 GLIBC_2.34 cnd_init F

sysdeps/unix/sysv/linux/sh/le/libc.abilist

@@ -2390,6 +2390,7 @@ GLIBC_2.34 aio_write F
 GLIBC_2.34 aio_write64 F
 GLIBC_2.34 call_once F
 GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
 GLIBC_2.34 cnd_broadcast F
 GLIBC_2.34 cnd_destroy F
 GLIBC_2.34 cnd_init F

sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist

@@ -2533,6 +2533,7 @@ GLIBC_2.34 aio_write F
 GLIBC_2.34 aio_write64 F
 GLIBC_2.34 call_once F
 GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
 GLIBC_2.34 cnd_broadcast F
 GLIBC_2.34 cnd_destroy F
 GLIBC_2.34 cnd_init F

sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist

@@ -2368,6 +2368,7 @@ GLIBC_2.34 aio_write F
 GLIBC_2.34 aio_write64 F
 GLIBC_2.34 call_once F
 GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
 GLIBC_2.34 cnd_broadcast F
 GLIBC_2.34 cnd_destroy F
 GLIBC_2.34 cnd_init F

sysdeps/unix/sysv/linux/x86_64/64/libc.abilist

@@ -2324,6 +2324,7 @@ GLIBC_2.34 aio_write F
 GLIBC_2.34 aio_write64 F
 GLIBC_2.34 call_once F
 GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
 GLIBC_2.34 cnd_broadcast F
 GLIBC_2.34 cnd_destroy F
 GLIBC_2.34 cnd_init F

sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist

@@ -2423,6 +2423,7 @@ GLIBC_2.34 aio_write F
 GLIBC_2.34 aio_write64 F
 GLIBC_2.34 call_once F
 GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
 GLIBC_2.34 cnd_broadcast F
 GLIBC_2.34 cnd_destroy F
 GLIBC_2.34 cnd_init F