kernel/linux.git/tools/include/nolibc/sys.h, branch v6.18.21

tools/nolibc: fold llseek fallback into lseek()

2025-09-01T18:47:54+00:00

Align the implementation of the fallback handling inside sys_lseek() with the rest of nolibc. Signed-off-by: Thomas Weißschuh Acked-by: Willy Tarreau Link: https://lore.kernel.org/r/20250821-nolibc-enosys-v1-5-4b63f2caaa89@weissschuh.net

tools/nolibc: remove __nolibc_enosys() fallback from fork functions

2025-09-01T18:47:54+00:00

All architectures have one of the real functions available. The additional fallback to __nolibc_enosys() is superfluous. Signed-off-by: Thomas Weißschuh Acked-by: Willy Tarreau Link: https://lore.kernel.org/r/20250821-nolibc-enosys-v1-4-4b63f2caaa89@weissschuh.net

tools/nolibc: remove __nolibc_enosys() fallback from dup2()

2025-09-01T18:47:53+00:00

tools/nolibc: remove __nolibc_enosys() fallback from *at() functions

2025-09-01T18:47:52+00:00

All architectures have had one of the real functions available since Linux 2.6.12. The additional fallback to __nolibc_enosys() is superfluous. Signed-off-by: Thomas Weißschuh Acked-by: Willy Tarreau Link: https://lore.kernel.org/r/20250821-nolibc-enosys-v1-2-4b63f2caaa89@weissschuh.net

tools/nolibc: remove __nolibc_enosys() fallback from time64-related functions

2025-09-01T18:47:51+00:00

These fallbacks where added when no explicit fallbacks for time64 was implemented. Now that these fallbacks are in place, the additional fallback to __nolibc_enosys() is superfluous. Signed-off-by: Thomas Weißschuh Acked-by: Willy Tarreau Link: https://lore.kernel.org/r/20250821-nolibc-enosys-v1-1-4b63f2caaa89@weissschuh.net

tools/nolibc: avoid error in dup2() if old fd equals new fd

2025-09-01T18:47:36+00:00

dup2() allows both 'old' and 'new' to have the same value, which dup3() does not. If libc dup2() is implemented through the dup3() system call, then it would incorrectly fail in this case. Avoid the error by handling old == new explicitly. Fixes: 30ca20517ac1 ("tools headers: Move the nolibc header from rcutorture to tools/include/nolibc/") Signed-off-by: Thomas Weißschuh Acked-by: Willy Tarreau Link: https://lore.kernel.org/r/20250820-nolibc-dup2-einval-v2-1-807185a45c56@linutronix.de Signed-off-by: Thomas Weißschuh

tools/nolibc: Provide vfork()

2025-07-04T11:26:12+00:00

To allow testing of vfork() support in the arm64 basic-gcs test provide an implementation for nolibc, using the vfork() syscall if one is available and otherwise clone3(). We implement in terms of clone3() since the order of the arguments for clone() varies between architectures. As for fork() SPARC returns the parent PID rather than 0 in the child for vfork() so needs custom handling. Signed-off-by: Mark Brown Link: https://lore.kernel.org/r/20250703-arm64-gcs-vfork-exit-v3-2-1e9a9d2ddbbe@kernel.org Signed-off-by: Thomas Weißschuh

tools/nolibc: Replace ifdef with if defined() in sys.h

2025-07-04T11:26:12+00:00

Thomas has requested that if defined() be used in place of ifdef but currently ifdef is used consistently in sys.h. Update all the instances of ifdef to if defined(). Suggested-by: Thomas Weißschuh Signed-off-by: Mark Brown Link: https://lore.kernel.org/r/20250703-arm64-gcs-vfork-exit-v3-1-1e9a9d2ddbbe@kernel.org Signed-off-by: Thomas Weißschuh

tools/nolibc: move uname() and friends to sys/utsname.h

2025-05-21T13:32:24+00:00

This is the location regular userspace expects these definitions. Signed-off-by: Thomas Weißschuh Acked-by: Willy Tarreau Link: https://lore.kernel.org/r/20250515-nolibc-sys-v1-7-74f82eea3b59@weissschuh.net

tools/nolibc: move getrlimit() and friends to sys/resource.h

2025-05-21T13:32:21+00:00