sysdeps/unix/sysv/linux/not-errno.h

   1 /* Syscall wrapper that do not set errno.  Linux version.
   2    Copyright (C) 2017-2022 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <sysdep.h>
  20 #include <fcntl.h>
  21
  22 /* This function is used on maybe_enable_malloc_check (elf/dl-tunables.c)
  23    and to avoid having to build/use multiple versions if stack protection
  24    in enabled it is defined as inline.  */
  25 static inline int
  26 __access_noerrno (const char *pathname, int mode)
  27 {
  28   int res;
  29 #ifdef __NR_access
  30   res = INTERNAL_SYSCALL_CALL (access, pathname, mode);
  31 #else
  32   res = INTERNAL_SYSCALL_CALL (faccessat, AT_FDCWD, pathname, mode);
  33 #endif
  34   if (INTERNAL_SYSCALL_ERROR_P (res))
  35     return INTERNAL_SYSCALL_ERRNO (res);
  36   return 0;
  37 }
  38
  39 static inline int
  40 __kill_noerrno (pid_t pid, int sig)
  41 {
  42   int res;
  43   res = INTERNAL_SYSCALL_CALL (kill, pid, sig);
  44   if (INTERNAL_SYSCALL_ERROR_P (res))
  45     return INTERNAL_SYSCALL_ERRNO (res);
  46   return 0;
  47 }