Package: coreutils;
Reported by: Bruno Haible <bruno <at> clisp.org>
Date: Fri, 5 Apr 2024 09:49:02 UTC
Severity: normal
Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):
From: Bruno Haible <bruno <at> clisp.org> To: bug-coreutils <at> gnu.org Subject: 'install' fails to copy regular file to autofs/cifs, due to ACL or xattr handling Date: Fri, 05 Apr 2024 11:48:14 +0200
Hi,
The 'install' program from coreutils-9.5 fails to copy a regular file
from an ext4 mount to an autofs/cifs mount.
The same operation, with 'cp -a', works fine.
Also, it works fine when coreutils was built with the configure options
"--disable-acl --disable-xattr".
How to reproduce
================
1) On the machine sparcdev.matoro.tk (Linux 6.8.2), I built coreutils-9.5
from source,
- once with default options, in build-sparc64/,
- once with "--disable-acl --disable-xattr", in build-sparc64-no-acl/.
2) Create a regular file on an ext4 mount:
$ echo hi > /var/tmp/foo3941
$ ls -lZ /var/tmp/foo3941
-rw-r----- 1 g-haible g-haible ? 3 Apr 4 13:29 /var/tmp/foo3941
$ getfacl /var/tmp/foo3941
getfacl: Removing leading '/' from absolute path names
# file: var/tmp/foo3941
# owner: g-haible
# group: g-haible
user::rw-
group::r--
other::---
$ df -m /var/tmp/
Filesystem 1M-blocks Used Available Use% Mounted on
/dev/root 560245 123140 408574 24% /
$ mount | grep ' / '
/dev/sda2 on / type ext4 (rw,noatime)
3) Details about the destination directory:
$ echo $HOME
/media/guest-homedirs/haible
$ mount | grep /media/guest-homedirs/haible
/etc/autofs/auto.guest-homedirs on /media/guest-homedirs/haible type autofs (rw,relatime,fd=7,pgrp=2325,timeout=60,minproto=5,maxproto=5,direct,pipe_ino=46092)
//syslog.matoro.tk/guest-haible on /media/guest-homedirs/haible type cifs (rw,nosuid,relatime,vers=1.0,cache=strict,username=nobody,uid=30014,forceuid,gid=30014,forcegid,addr=fd05:0000:0000:0000:0000:0000:0000:0001,soft,unix,posixpaths,serverino,mapposix,acl,rsize=1048576,wsize=65536,bsize=1048576,retrans=1,echo_interval=60,actimeo=1,closetimeo=1)
4) The operation that fails:
$ build-sparc64/src/ginstall -c /var/tmp/foo3941 $HOME/foo3941; echo $?
build-sparc64/src/ginstall: setting permissions for '/media/guest-homedirs/haible/foo3941': Permission denied
1
$ build-sparc64-no-acl/src/ginstall -c /var/tmp/foo3941 $HOME/foo3941; echo $?
0
5) The same thing with 'cp -a' succeeds:
$ build-sparc64/src/cp -a /var/tmp/foo3941 $HOME/foo3941; echo $?
0
$ build-sparc64-no-acl/src/cp -a /var/tmp/foo3941 $HOME/foo3941; echo $?
0
6) 'strace' shows a failing call to fsetxattr:
$ strace build-sparc64/src/ginstall -c /var/tmp/foo3941 $HOME/foo3941
execve("build-sparc64/src/ginstall", ["build-sparc64/src/ginstall", "-c", "/var/tmp/foo3941", "/media/guest-homedirs/haible/foo"...], 0x7feffffce28 /* 43 vars */) = 0
brk(NULL) = 0x10000204000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=41866, ...}) = 0
mmap(NULL, 41866, PROT_READ, MAP_PRIVATE, 3, 0) = 0xfff8000100028000
close(3) = 0
openat(AT_FDCWD, "/usr/lib64/libacl.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\2\1\0\0\0\0\0\0\0\0\0\0\3\0+\0\0\0\1\0\0\0\0\0\0\0\0"..., 832) = 832
fstat64(3, {st_mode=S_IFREG|0755, st_size=1052312, ...}) = 0
mmap(NULL, 16384, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xfff8000100034000
mmap(NULL, 3147696, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_DENYWRITE, -1, 0) = 0xfff8000100206000
mmap(0xfff8000100300000, 2099120, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0) = 0xfff8000100300000
munmap(0xfff8000100206000, 1024000) = 0
munmap(0xfff8000100502000, 18352) = 0
mprotect(0xfff8000100308000, 2056192, PROT_NONE) = 0
mmap(0xfff80001004fe000, 16384, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xfe000) = 0xfff80001004fe000
close(3) = 0
openat(AT_FDCWD, "/usr/lib64/libattr.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\2\1\0\0\0\0\0\0\0\0\0\0\3\0+\0\0\0\1\0\0\0\0\0\0\0\0"..., 832) = 832
fstat64(3, {st_mode=S_IFREG|0755, st_size=1051928, ...}) = 0
mmap(NULL, 3147288, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_DENYWRITE, -1, 0) = 0xfff8000100502000
mmap(0xfff8000100600000, 2098712, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0) = 0xfff8000100600000
munmap(0xfff8000100502000, 1040384) = 0
munmap(0xfff8000100802000, 1560) = 0
mprotect(0xfff8000100604000, 2072576, PROT_NONE) = 0
mmap(0xfff80001007fe000, 16384, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xfe000) = 0xfff80001007fe000
close(3) = 0
openat(AT_FDCWD, "/usr/lib64/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\2\1\3\0\0\0\0\0\0\0\0\0\3\0+\0\0\0\1\0\0\0\0\0\2\305\240"..., 832) = 832
fstat64(3, {st_mode=S_IFREG|0755, st_size=2110256, ...}) = 0
mmap(NULL, 4233760, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_DENYWRITE, -1, 0) = 0xfff8000100802000
mmap(0xfff8000100900000, 3185184, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0) = 0xfff8000100900000
munmap(0xfff8000100802000, 1040384) = 0
munmap(0xfff8000100c0a000, 6688) = 0
mprotect(0xfff8000100a8e000, 1499136, PROT_NONE) = 0
mmap(0xfff8000100bfc000, 24576, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1fc000) = 0xfff8000100bfc000
mmap(0xfff8000100c02000, 31264, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xfff8000100c02000
close(3) = 0
set_tid_address(0xfff80001000365f0) = 28674
set_robust_list(0xfff8000100036600, 24) = 0
mprotect(0xfff8000100bfc000, 16384, PROT_READ) = 0
mprotect(0xfff80001007fe000, 8192, PROT_READ) = 0
mprotect(0xfff80001004fe000, 8192, PROT_READ) = 0
mprotect(0x100001fe000, 8192, PROT_READ) = 0
mprotect(0xfff80001001fe000, 8192, PROT_READ) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
munmap(0xfff8000100028000, 41866) = 0
getrandom("\x78\x3e\xea\xde\x42\xab\xf0\x1b", 8, GRND_NONBLOCK) = 8
brk(NULL) = 0x10000204000
brk(0x10000226000) = 0x10000226000
openat(AT_FDCWD, "/usr/lib/locale/locale-archive", O_RDONLY|O_CLOEXEC) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=3061520, ...}) = 0
mmap(NULL, 3061520, PROT_READ, MAP_PRIVATE, 3, 0) = 0xfff8000100c0c000
close(3) = 0
openat(AT_FDCWD, "/usr/share/locale/locale.alias", O_RDONLY|O_CLOEXEC) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=2998, ...}) = 0
read(3, "# Locale name alias data base.\n#"..., 4096) = 2998
read(3, "", 4096) = 0
close(3) = 0
openat(AT_FDCWD, "/usr/lib/locale/de_DE.UTF-8/LC_IDENTIFICATION", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/locale/de_DE.utf8/LC_IDENTIFICATION", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/locale/de_DE/LC_IDENTIFICATION", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/locale/de.UTF-8/LC_IDENTIFICATION", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/locale/de.utf8/LC_IDENTIFICATION", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/locale/de/LC_IDENTIFICATION", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
geteuid() = 30014
umask(000) = 027
openat(AT_FDCWD, "/media/guest-homedirs/haible/foo3941", O_RDONLY|O_PATH|O_DIRECTORY) = -1 ENOTDIR (Not a directory)
fstatat64(AT_FDCWD, "/var/tmp/foo3941", {st_mode=S_IFREG|0640, st_size=3, ...}, 0) = 0
fstatat64(AT_FDCWD, "/media/guest-homedirs/haible/foo3941", {st_mode=S_IFREG|0640, st_size=3, ...}, AT_SYMLINK_NOFOLLOW) = 0
unlinkat(AT_FDCWD, "/media/guest-homedirs/haible/foo3941", 0) = 0
openat(AT_FDCWD, "/var/tmp/foo3941", O_RDONLY) = 3
fstat64(3, {st_mode=S_IFREG|0640, st_size=3, ...}) = 0
openat(AT_FDCWD, "/media/guest-homedirs/haible/foo3941", O_WRONLY|O_CREAT|O_EXCL, 0600) = 4
ioctl(4, BTRFS_IOC_CLONE or FICLONE, 3) = -1 EXDEV (Invalid cross-device link)
fstat64(4, {st_mode=S_IFREG|0600, st_size=0, ...}) = 0
fadvise64_64(3, 0, 0, POSIX_FADV_SEQUENTIAL) = 0
uname({sysname="Linux", nodename="matoro-sparcdev", ...}) = 0
copy_file_range(3, NULL, 4, NULL, 9223372035781033984, 0) = -1 EXDEV (Invalid cross-device link)
mmap(NULL, 1064960, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xfff8000100038000
read(3, "hi\n", 1048576) = 3
write(4, "hi\n", 3) = 3
read(3, "", 1048576) = 0
fsetxattr(4, "system.posix_acl_access", "\2\0\0\0\1\0\6\0\377\377\377\377\4\0\0\0\377\377\377\377 \0\0\0\377\377\377\377", 28, 0) = -1 EACCES (Permission denied)
fchmod(4, 0600) = 0
write(2, "build-sparc64/src/ginstall: ", 28build-sparc64/src/ginstall: ) = 28
write(2, "setting permissions for '/media/"..., 62setting permissions for '/media/guest-homedirs/haible/foo3941') = 62
write(2, ": Permission denied", 19: Permission denied) = 19
write(2, "\n", 1
) = 1
close(4) = 0
close(3) = 0
munmap(0xfff8000100038000, 1064960) = 0
_llseek(0, 0, 0x7feffbca600, SEEK_CUR) = -1 ESPIPE (Illegal seek)
close(0) = 0
close(1) = 0
close(2) = 0
exit_group(1) = ?
+++ exited with 1 +++
7) Symbol differences between the two builds:
$ nm build-sparc64/src/ginstall | grep acl
000000000001725c T acl_access_nontrivial
000000000001732c T acl_default_nontrivial
U acl_delete_def_file <at> ACL_1.0
U acl_entries <at> ACL_1.0
0000000000018b24 T acl_errno_valid
U acl_free <at> ACL_1.0
U acl_from_mode <at> ACL_1.0
U acl_get_entry <at> ACL_1.0
U acl_get_tag_type <at> ACL_1.0
U acl_set_fd <at> ACL_1.0
U acl_set_file <at> ACL_1.0
000000000000b5f4 T copy_acl
000000000000fbb8 T qcopy_acl
000000000000fc3c T qset_acl
000000000000b6d4 T set_acl
0000000000017394 t set_acls.isra.0
$ nm build-sparc64-no-acl/src/ginstall | grep acl
000000000000ade8 T copy_acl
000000000000f37c T qcopy_acl
000000000000f40c T qset_acl
000000000000aec8 T set_acl
Notes
=====
The 'cp' program does *not* use fsetxattr() calls on the destination file
descriptor and therefore does not fail:
$ strace build-sparc64/src/cp -a /var/tmp/foo3941 $HOME/foo3941
execve("build-sparc64/src/cp", ["build-sparc64/src/cp", "-a", "/var/tmp/foo3941", "/media/guest-homedirs/haible/foo"...], 0x7feffc96e38 /* 43 vars */) = 0
brk(NULL) = 0x10000202000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=41866, ...}) = 0
mmap(NULL, 41866, PROT_READ, MAP_PRIVATE, 3, 0) = 0xfff8000100028000
close(3) = 0
openat(AT_FDCWD, "/usr/lib64/libacl.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\2\1\0\0\0\0\0\0\0\0\0\0\3\0+\0\0\0\1\0\0\0\0\0\0\0\0"..., 832) = 832
fstat64(3, {st_mode=S_IFREG|0755, st_size=1052312, ...}) = 0
mmap(NULL, 16384, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xfff8000100034000
mmap(NULL, 3147696, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_DENYWRITE, -1, 0) = 0xfff8000100494000
mmap(0xfff8000100500000, 2099120, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0) = 0xfff8000100500000
munmap(0xfff8000100494000, 442368) = 0
munmap(0xfff8000100702000, 599984) = 0
mprotect(0xfff8000100508000, 2056192, PROT_NONE) = 0
mmap(0xfff80001006fe000, 16384, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xfe000) = 0xfff80001006fe000
close(3) = 0
openat(AT_FDCWD, "/usr/lib64/libattr.so.1", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\2\1\0\0\0\0\0\0\0\0\0\0\3\0+\0\0\0\1\0\0\0\0\0\0\0\0"..., 832) = 832
fstat64(3, {st_mode=S_IFREG|0755, st_size=1051928, ...}) = 0
mmap(NULL, 3147288, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_DENYWRITE, -1, 0) = 0xfff8000100702000
mmap(0xfff8000100800000, 2098712, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0) = 0xfff8000100800000
munmap(0xfff8000100702000, 1040384) = 0
munmap(0xfff8000100a02000, 1560) = 0
mprotect(0xfff8000100804000, 2072576, PROT_NONE) = 0
mmap(0xfff80001009fe000, 16384, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xfe000) = 0xfff80001009fe000
close(3) = 0
openat(AT_FDCWD, "/usr/lib64/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\2\1\3\0\0\0\0\0\0\0\0\0\3\0+\0\0\0\1\0\0\0\0\0\2\305\240"..., 832) = 832
fstat64(3, {st_mode=S_IFREG|0755, st_size=2110256, ...}) = 0
mmap(NULL, 4233760, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_DENYWRITE, -1, 0) = 0xfff8000100a02000
mmap(0xfff8000100b00000, 3185184, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0) = 0xfff8000100b00000
munmap(0xfff8000100a02000, 1040384) = 0
munmap(0xfff8000100e0a000, 6688) = 0
mprotect(0xfff8000100c8e000, 1499136, PROT_NONE) = 0
mmap(0xfff8000100dfc000, 24576, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1fc000) = 0xfff8000100dfc000
mmap(0xfff8000100e02000, 31264, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xfff8000100e02000
close(3) = 0
set_tid_address(0xfff80001000365d0) = 29091
set_robust_list(0xfff80001000365e0, 24) = 0
mprotect(0xfff8000100dfc000, 16384, PROT_READ) = 0
mprotect(0xfff80001009fe000, 8192, PROT_READ) = 0
mprotect(0xfff80001006fe000, 8192, PROT_READ) = 0
mprotect(0x100001fe000, 8192, PROT_READ) = 0
mprotect(0xfff80001001fe000, 8192, PROT_READ) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
munmap(0xfff8000100028000, 41866) = 0
getrandom("\x26\xa7\x29\x29\xf6\x69\x36\x3e", 8, GRND_NONBLOCK) = 8
brk(NULL) = 0x10000202000
brk(0x10000224000) = 0x10000224000
openat(AT_FDCWD, "/usr/lib/locale/locale-archive", O_RDONLY|O_CLOEXEC) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=3061520, ...}) = 0
mmap(NULL, 3061520, PROT_READ, MAP_PRIVATE, 3, 0) = 0xfff8000100e0c000
close(3) = 0
openat(AT_FDCWD, "/usr/share/locale/locale.alias", O_RDONLY|O_CLOEXEC) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=2998, ...}) = 0
read(3, "# Locale name alias data base.\n#"..., 4096) = 2998
read(3, "", 4096) = 0
close(3) = 0
openat(AT_FDCWD, "/usr/lib/locale/de_DE.UTF-8/LC_IDENTIFICATION", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/locale/de_DE.utf8/LC_IDENTIFICATION", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/locale/de_DE/LC_IDENTIFICATION", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/locale/de.UTF-8/LC_IDENTIFICATION", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/locale/de.utf8/LC_IDENTIFICATION", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/locale/de/LC_IDENTIFICATION", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
geteuid() = 30014
openat(AT_FDCWD, "/media/guest-homedirs/haible/foo3941", O_RDONLY|O_PATH|O_DIRECTORY) = -1 ENOTDIR (Not a directory)
fstatat64(AT_FDCWD, "/var/tmp/foo3941", {st_mode=S_IFREG|0640, st_size=3, ...}, AT_SYMLINK_NOFOLLOW) = 0
fstatat64(AT_FDCWD, "/media/guest-homedirs/haible/foo3941", {st_mode=S_IFREG|0600, st_size=3, ...}, 0) = 0
openat(AT_FDCWD, "/var/tmp/foo3941", O_RDONLY|O_NOFOLLOW) = 3
fstat64(3, {st_mode=S_IFREG|0640, st_size=3, ...}) = 0
openat(AT_FDCWD, "/media/guest-homedirs/haible/foo3941", O_WRONLY|O_TRUNC) = 4
ioctl(4, BTRFS_IOC_CLONE or FICLONE, 3) = -1 EXDEV (Invalid cross-device link)
fstat64(4, {st_mode=S_IFREG|0600, st_size=0, ...}) = 0
fadvise64_64(3, 0, 0, POSIX_FADV_SEQUENTIAL) = 0
uname({sysname="Linux", nodename="matoro-sparcdev", ...}) = 0
copy_file_range(3, NULL, 4, NULL, 9223372035781033984, 0) = -1 EXDEV (Invalid cross-device link)
mmap(NULL, 1064960, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xfff8000100038000
read(3, "hi\n", 1048576) = 3
write(4, "hi\n", 3) = 3
read(3, "", 1048576) = 0
utimensat(4, NULL, [{tv_sec=1712251745, tv_nsec=269582795} /* 2024-04-04T13:29:05.269582795-0400 */, {tv_sec=1712251745, tv_nsec=270582848} /* 2024-04-04T13:29:05.270582848-0400 */], 0) = 0
flistxattr(3, NULL, 0) = 0
flistxattr(3, 0x7feff9860a0, 0) = 0
fchmod(4, 0100640) = 0
flistxattr(3, NULL, 0) = 0
flistxattr(3, 0x7feff9860c0, 0) = 0
close(4) = 0
close(3) = 0
munmap(0xfff8000100038000, 1064960) = 0
_llseek(0, 0, 0x7feff986600, SEEK_CUR) = -1 ESPIPE (Illegal seek)
close(0) = 0
close(1) = 0
close(2) = 0
exit_group(0) = ?
+++ exited with 0 +++
As you can see, it uses 4 flistxattr() calls on the source file descriptor,
apparently detecting that it's a regular file without ACLs, and proceeds to
do a simple fchmod() call on the destination file descriptor.
Probably the same logic is needed in the 'install' program.
Bruno
GNU bug tracking system
Copyright (C) 1999 Darren O. Benham,
1997,2003 nCipher Corporation Ltd,
1994-97 Ian Jackson.