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Linux: consolidate readlink implementation 

Use readlink syscall if defined, otherwise readlinkat.

Checked on x86_64-linux-gnu.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
This commit is contained in:
Adhemerval Zanella Netto 2022-10-19 19:14:14 -03:00 committed by Adhemerval Zanella
parent ccb9215dbe
commit 2fc81f6ca5
1 changed files with 7 additions and 2 deletions
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9
sysdeps/unix/sysv/linux/generic/readlink.c → sysdeps/unix/sysv/linux/readlink.c
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@ -1,4 +1,5 @@
/* Copyright (C) 2011-2022 Free Software Foundation, Inc.
/* Read value of a symbolic link. Linux version.
Copyright (C) 2011-2022 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
@ -25,6 +26,10 @@
ssize_t
__readlink (const char *path, char *buf, size_t len)
{
return INLINE_SYSCALL (readlinkat, 4, AT_FDCWD, path, buf, len);
#ifdef __NR_readlink
return INLINE_SYSCALL_CALL (readlink, path, buf, len);
#else
return INLINE_SYSCALL_CALL (readlinkat, AT_FDCWD, path, buf, len);
#endif
}
weak_alias (__readlink, readlink)