@@ -91,6 +91,10 @@ Major new features:
The latest GCC available at this time (10.2) does not support this level of
fortification.
+* 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 mallinfo function is marked deprecated. Callers should call
@@ -153,6 +153,7 @@ 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);
@@ -54,7 +54,8 @@ routines := \
posix_fadvise posix_fadvise64 \
posix_fallocate posix_fallocate64 \
sendfile sendfile64 copy_file_range \
- utimensat futimens file_change_detection
+ utimensat futimens file_change_detection \
+ closefrom
others := pwd
test-srcs := ftwtest
@@ -68,7 +69,7 @@ tests := test-utime test-stat test-stat2 test-lfs tst-getcwd \
tst-fts tst-fts-lfs tst-open-tmpfile \
tst-copy_file_range tst-getcwd-abspath tst-lockf \
tst-ftw-lnk tst-file_change_detection tst-lchmod \
- tst-ftw-bz26353
+ tst-ftw-bz26353 tst-closefrom
# Likewise for statx, but we do not need static linking here.
tests-internal += tst-statx
@@ -136,6 +136,9 @@ libc {
stat; stat64; fstat; fstat64; lstat; lstat64; fstatat; fstatat64;
mknod; mknodat;
}
+ GLIBC_2.34 {
+ closefrom;
+ }
GLIBC_PRIVATE {
__libc_fcntl64;
__fcntl_nocancel;
new file mode 100644
@@ -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)
new file mode 100644
@@ -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>
@@ -325,6 +325,16 @@ The maximum number of file descriptors is controlled by the
@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 call
+@code{close} applied to the specified file descriptor range.
+
+Already closed file descriptors are ignored.
+@end deftypefun
@node I/O Primitives
@section Input and Output Primitives
@@ -352,6 +352,12 @@ 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.
@@ -2204,6 +2204,7 @@ GLIBC_2.33 mknodat F
GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
+GLIBC_2.34 closefrom F
GLIBC_2.4 __confstr_chk F
GLIBC_2.4 __fgets_chk F
GLIBC_2.4 __fgets_unlocked_chk F
@@ -64,7 +64,8 @@ sysdep_routines += adjtimex clone umount umount2 readahead sysctl \
time64-support pselect32 \
xstat fxstat lxstat xstat64 fxstat64 lxstat64 \
fxstatat fxstatat64 \
- xmknod xmknodat
+ xmknod xmknodat \
+ closefrom_fallback
CFLAGS-gethostid.c = -fexceptions
CFLAGS-tee.c = -fexceptions -fasynchronous-unwind-tables
@@ -2173,3 +2173,4 @@ GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
@@ -2255,6 +2255,7 @@ GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
GLIBC_2.4 _IO_fprintf F
GLIBC_2.4 _IO_printf F
GLIBC_2.4 _IO_sprintf F
@@ -1933,3 +1933,4 @@ GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
@@ -144,6 +144,7 @@ GLIBC_2.32 sigabbrev_np F
GLIBC_2.32 sigdescr_np F
GLIBC_2.32 strerrordesc_np F
GLIBC_2.32 strerrorname_np F
+GLIBC_2.33 closefrom F
GLIBC_2.33 fstat F
GLIBC_2.33 fstat64 F
GLIBC_2.33 fstatat F
@@ -157,6 +158,7 @@ GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
GLIBC_2.4 _Exit F
GLIBC_2.4 _IO_2_1_stderr_ D 0xa0
GLIBC_2.4 _IO_2_1_stdin_ D 0xa0
@@ -154,6 +154,7 @@ GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
GLIBC_2.4 _Exit F
GLIBC_2.4 _IO_2_1_stderr_ D 0xa0
GLIBC_2.4 _IO_2_1_stdin_ D 0xa0
new file mode 100644
@@ -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)
new file mode 100644
@@ -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;
+}
@@ -2117,3 +2117,4 @@ GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
@@ -2076,6 +2076,7 @@ GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
GLIBC_2.4 __confstr_chk F
GLIBC_2.4 __fgets_chk F
GLIBC_2.4 __fgets_unlocked_chk F
@@ -2243,6 +2243,7 @@ GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
GLIBC_2.4 __confstr_chk F
GLIBC_2.4 __fgets_chk F
GLIBC_2.4 __fgets_unlocked_chk F
@@ -2108,6 +2108,7 @@ GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
GLIBC_2.4 __confstr_chk F
GLIBC_2.4 __fgets_chk F
GLIBC_2.4 __fgets_unlocked_chk F
@@ -145,6 +145,7 @@ GLIBC_2.32 sigabbrev_np F
GLIBC_2.32 sigdescr_np F
GLIBC_2.32 strerrordesc_np F
GLIBC_2.32 strerrorname_np F
+GLIBC_2.33 closefrom F
GLIBC_2.33 fstat F
GLIBC_2.33 fstat64 F
GLIBC_2.33 fstatat F
@@ -158,6 +159,7 @@ GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
GLIBC_2.4 _Exit F
GLIBC_2.4 _IO_2_1_stderr_ D 0x98
GLIBC_2.4 _IO_2_1_stdin_ D 0x98
@@ -2188,6 +2188,7 @@ GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
GLIBC_2.4 __confstr_chk F
GLIBC_2.4 __fgets_chk F
GLIBC_2.4 __fgets_unlocked_chk F
@@ -2168,3 +2168,4 @@ GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
@@ -2152,6 +2152,7 @@ GLIBC_2.32 sigabbrev_np F
GLIBC_2.32 sigdescr_np F
GLIBC_2.32 strerrordesc_np F
GLIBC_2.32 strerrorname_np F
+GLIBC_2.33 closefrom F
GLIBC_2.33 fstat F
GLIBC_2.33 fstat64 F
GLIBC_2.33 fstatat F
@@ -2165,3 +2166,4 @@ GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
@@ -2159,6 +2159,7 @@ GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
GLIBC_2.4 __confstr_chk F
GLIBC_2.4 __fgets_chk F
GLIBC_2.4 __fgets_unlocked_chk F
@@ -2144,6 +2144,7 @@ GLIBC_2.32 sigabbrev_np F
GLIBC_2.32 sigdescr_np F
GLIBC_2.32 strerrordesc_np F
GLIBC_2.32 strerrorname_np F
+GLIBC_2.33 closefrom F
GLIBC_2.33 fstat F
GLIBC_2.33 fstat64 F
GLIBC_2.33 fstatat F
@@ -2157,6 +2158,7 @@ GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
GLIBC_2.4 __confstr_chk F
GLIBC_2.4 __fgets_chk F
GLIBC_2.4 __fgets_unlocked_chk F
@@ -2165,6 +2165,7 @@ GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
GLIBC_2.4 __confstr_chk F
GLIBC_2.4 __fgets_chk F
GLIBC_2.4 __fgets_unlocked_chk F
@@ -2159,6 +2159,7 @@ GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
GLIBC_2.4 __confstr_chk F
GLIBC_2.4 __fgets_chk F
GLIBC_2.4 __fgets_unlocked_chk F
@@ -2206,3 +2206,4 @@ GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
@@ -2215,6 +2215,7 @@ GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
GLIBC_2.4 _IO_fprintf F
GLIBC_2.4 _IO_printf F
GLIBC_2.4 _IO_sprintf F
@@ -2235,6 +2235,7 @@ GLIBC_2.32 sigabbrev_np F
GLIBC_2.32 sigdescr_np F
GLIBC_2.32 strerrordesc_np F
GLIBC_2.32 strerrorname_np F
+GLIBC_2.33 closefrom F
GLIBC_2.33 fstat F
GLIBC_2.33 fstat64 F
GLIBC_2.33 fstatat F
@@ -2248,6 +2249,7 @@ GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
GLIBC_2.4 _IO_fprintf F
GLIBC_2.4 _IO_printf F
GLIBC_2.4 _IO_sprintf F
@@ -2078,6 +2078,7 @@ GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
GLIBC_2.4 _IO_fprintf F
GLIBC_2.4 _IO_printf F
GLIBC_2.4 _IO_sprintf F
@@ -2368,3 +2368,4 @@ GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
@@ -596,6 +596,7 @@ GLIBC_2.33 clock_settime F
GLIBC_2.33 clone F
GLIBC_2.33 close F
GLIBC_2.33 closedir F
+GLIBC_2.33 closefrom F
GLIBC_2.33 closelog F
GLIBC_2.33 confstr F
GLIBC_2.33 connect F
@@ -1935,3 +1936,4 @@ GLIBC_2.33 writev F
GLIBC_2.33 wscanf F
GLIBC_2.34 __libc_start_main F
GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
@@ -2135,3 +2135,4 @@ GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
@@ -2213,6 +2213,7 @@ GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
GLIBC_2.4 _IO_fprintf F
GLIBC_2.4 _IO_printf F
GLIBC_2.4 _IO_sprintf F
@@ -2114,6 +2114,7 @@ GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
GLIBC_2.4 _IO_fprintf F
GLIBC_2.4 _IO_printf F
GLIBC_2.4 _IO_sprintf F
@@ -2070,6 +2070,7 @@ GLIBC_2.32 sigabbrev_np F
GLIBC_2.32 sigdescr_np F
GLIBC_2.32 strerrordesc_np F
GLIBC_2.32 strerrorname_np F
+GLIBC_2.33 closefrom F
GLIBC_2.33 fstat F
GLIBC_2.33 fstat64 F
GLIBC_2.33 fstatat F
@@ -2083,6 +2084,7 @@ GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
GLIBC_2.4 __confstr_chk F
GLIBC_2.4 __fgets_chk F
GLIBC_2.4 __fgets_unlocked_chk F
@@ -2080,6 +2080,7 @@ GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
GLIBC_2.4 __confstr_chk F
GLIBC_2.4 __fgets_chk F
GLIBC_2.4 __fgets_unlocked_chk F
@@ -2204,6 +2204,7 @@ GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
GLIBC_2.4 _IO_fprintf F
GLIBC_2.4 _IO_printf F
GLIBC_2.4 _IO_sprintf F
@@ -2131,6 +2131,7 @@ GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
GLIBC_2.4 __confstr_chk F
GLIBC_2.4 __fgets_chk F
GLIBC_2.4 __fgets_unlocked_chk F
@@ -2090,6 +2090,7 @@ GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F
GLIBC_2.4 __confstr_chk F
GLIBC_2.4 __fgets_chk F
GLIBC_2.4 __fgets_unlocked_chk F
@@ -2187,3 +2187,4 @@ GLIBC_2.33 stat F
GLIBC_2.33 stat64 F
GLIBC_2.34 __libc_start_main F
GLIBC_2.34 close_range F
+GLIBC_2.34 closefrom F