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Name	Size	Permission	Date
platform	[ DIR ]	drwxr-xr-x	2026-05-28 07:04
acct.h	3.3 KB	-rw-r--r--	2026-05-26 00:00
auxv.h	1.23 KB	-rw-r--r--	2026-05-26 00:00
bitypes.h	86 B	-rw-r--r--	2026-05-26 00:00
capability.h	8.48 KB	-rw-r--r--	2026-04-21 00:00
cdefs.h	26.69 KB	-rw-r--r--	2026-05-26 00:00
debugreg.h	3.49 KB	-rw-r--r--	2026-05-26 00:00
dir.h	922 B	-rw-r--r--	2026-05-26 00:00
elf.h	1 KB	-rw-r--r--	2026-05-26 00:00
epoll.h	5.18 KB	-rw-r--r--	2026-05-26 00:00
errno.h	19 B	-rw-r--r--	2026-05-26 00:00
eventfd.h	1.37 KB	-rw-r--r--	2026-05-26 00:00
fanotify.h	1.26 KB	-rw-r--r--	2026-05-26 00:00
fcntl.h	19 B	-rw-r--r--	2026-05-26 00:00
file.h	1.64 KB	-rw-r--r--	2026-05-26 00:00
fsuid.h	1.16 KB	-rw-r--r--	2026-05-26 00:00
gmon.h	6.08 KB	-rw-r--r--	2026-05-26 00:00
gmon_out.h	2.52 KB	-rw-r--r--	2026-05-26 00:00
inotify.h	3.81 KB	-rw-r--r--	2026-05-26 00:00
io.h	4.97 KB	-rw-r--r--	2026-05-26 00:00
ioctl.h	1.98 KB	-rw-r--r--	2026-05-26 00:00
ipc.h	1.43 KB	-rw-r--r--	2026-05-26 00:00
kd.h	1.09 KB	-rw-r--r--	2026-05-26 00:00
klog.h	1.18 KB	-rw-r--r--	2026-05-26 00:00
mman.h	5.48 KB	-rw-r--r--	2026-05-26 00:00
mount.h	11.77 KB	-rw-r--r--	2026-05-26 00:00
msg.h	2.57 KB	-rw-r--r--	2026-05-26 00:00
mtio.h	10.85 KB	-rw-r--r--	2026-05-26 00:00
param.h	3.08 KB	-rw-r--r--	2026-05-26 00:00
pci.h	923 B	-rw-r--r--	2026-05-26 00:00
perm.h	1.1 KB	-rw-r--r--	2026-05-26 00:00
personality.h	2.66 KB	-rw-r--r--	2026-05-26 00:00
pidfd.h	4.54 KB	-rw-r--r--	2026-05-26 00:00
poll.h	2.96 KB	-rw-r--r--	2026-05-26 00:00
prctl.h	1.76 KB	-rw-r--r--	2026-05-26 00:00
procfs.h	4.24 KB	-rw-r--r--	2026-05-26 00:00
profil.h	1.91 KB	-rw-r--r--	2026-05-26 00:00
psx_syscall.h	3.43 KB	-rw-r--r--	2026-04-21 00:00
ptrace.h	6.52 KB	-rw-r--r--	2026-05-26 00:00
queue.h	19.08 KB	-rw-r--r--	2026-05-26 00:00
quota.h	5.05 KB	-rw-r--r--	2026-05-26 00:00
random.h	1.55 KB	-rw-r--r--	2026-05-26 00:00
raw.h	1.15 KB	-rw-r--r--	2026-05-26 00:00
reboot.h	1.59 KB	-rw-r--r--	2026-05-26 00:00
reg.h	1.78 KB	-rw-r--r--	2026-05-26 00:00
resource.h	3.94 KB	-rw-r--r--	2026-05-26 00:00
rseq.h	6.26 KB	-rw-r--r--	2026-05-26 00:00
sdt-config.h	245 B	-rw-r--r--	2025-12-02 00:00
sdt.h	21.81 KB	-rw-r--r--	2025-12-02 00:00
select.h	4.93 KB	-rw-r--r--	2026-05-26 00:00
sem.h	2.61 KB	-rw-r--r--	2026-05-26 00:00
sendfile.h	1.76 KB	-rw-r--r--	2026-05-26 00:00
shm.h	2.09 KB	-rw-r--r--	2026-05-26 00:00
signal.h	20 B	-rw-r--r--	2026-05-26 00:00
signalfd.h	1.67 KB	-rw-r--r--	2026-05-26 00:00
single_threaded.h	1.15 KB	-rw-r--r--	2026-05-26 00:00
socket.h	12.13 KB	-rw-r--r--	2026-05-26 00:00
socketvar.h	141 B	-rw-r--r--	2026-05-26 00:00
soundcard.h	29 B	-rw-r--r--	2026-05-26 00:00
stat.h	13.45 KB	-rw-r--r--	2026-05-26 00:00
statfs.h	2.04 KB	-rw-r--r--	2026-05-26 00:00
statvfs.h	2.75 KB	-rw-r--r--	2026-05-26 00:00
swap.h	1.56 KB	-rw-r--r--	2026-05-26 00:00
syscall.h	1.23 KB	-rw-r--r--	2026-05-26 00:00
sysinfo.h	1.48 KB	-rw-r--r--	2026-05-26 00:00
syslog.h	7.66 KB	-rw-r--r--	2026-05-26 00:00
sysmacros.h	2.05 KB	-rw-r--r--	2026-05-26 00:00
termios.h	74 B	-rw-r--r--	2026-05-26 00:00
time.h	8.95 KB	-rw-r--r--	2026-05-26 00:00
timeb.h	1.13 KB	-rw-r--r--	2026-05-26 00:00
timerfd.h	2.53 KB	-rw-r--r--	2026-05-26 00:00
times.h	1.56 KB	-rw-r--r--	2026-05-26 00:00
timex.h	2.9 KB	-rw-r--r--	2026-05-26 00:00
ttychars.h	2.44 KB	-rw-r--r--	2026-05-26 00:00
ttydefaults.h	3.48 KB	-rw-r--r--	2026-05-26 00:00
types.h	5.58 KB	-rw-r--r--	2026-05-26 00:00
ucontext.h	5.71 KB	-rw-r--r--	2026-05-26 00:00
uio.h	6.64 KB	-rw-r--r--	2026-05-26 00:00
un.h	1.46 KB	-rw-r--r--	2026-05-26 00:00
unistd.h	20 B	-rw-r--r--	2026-05-26 00:00
user.h	5.09 KB	-rw-r--r--	2026-05-26 00:00
utsname.h	2.42 KB	-rw-r--r--	2026-05-26 00:00
vfs.h	161 B	-rw-r--r--	2026-05-26 00:00
vlimit.h	1.84 KB	-rw-r--r--	2026-05-26 00:00
vm86.h	1.17 KB	-rw-r--r--	2026-05-26 00:00
vt.h	22 B	-rw-r--r--	2026-05-26 00:00
wait.h	5.97 KB	-rw-r--r--	2026-05-26 00:00
xattr.h	4.52 KB	-rw-r--r--	2026-05-26 00:00

Rename

/*
 * Copyright (c) 2019 Andrew G. Morgan <morgan@kernel.org>
 *
 * This header, and the -lpsx library, provide a number of things to
 * support POSIX semantics for syscalls associated with the pthread
 * library. Linking this code is tricky and is done as follows:
 *
 *     ld ... -lpsx -lpthread --wrap=pthread_create
 * or, gcc ... -lpsx -lpthread -Wl,-wrap,pthread_create
 *
 * glibc provides a subset of this functionality natively through the
 * nptl:setxid mechanism and could implement psx_syscall() directly
 * using that style of functionality but, as of 2019-11-30, the setxid
 * mechanism is limited to 9 specific set*() syscalls that do not
 * support the syscall6 API (needed for prctl functions and the ambient
 * capabilities set for example).
 */

#ifndef _SYS_PSX_SYSCALL_H
#define _SYS_PSX_SYSCALL_H

#ifdef __cplusplus
extern "C" {
#endif

#include <pthread.h>

/*
 * psx_syscall performs the specified syscall on all psx registered
 * threads. The mechanism by which this occurs is much less efficient
 * than a standard system call on Linux, so it should only be used
 * when POSIX semantics are required to change process relevant
 * security state.
 *
 * Glibc has native support for POSIX semantics on setgroups() and the
 * 8 set*[gu]id() functions. So, there is no need to use psx_syscall()
 * for these calls. This call exists for all the other system calls
 * that need to maintain parity on all pthreads of a program.
 *
 * Some macrology is used to allow the caller to provide only as many
 * arguments as needed, thus psx_syscall() cannot be used as a
 * function pointer. For those situations, we define psx_syscall3()
 * and psx_syscall6().
 */
#define psx_syscall(syscall_nr, ...) \
    __psx_syscall(syscall_nr, __VA_ARGS__, (long int) 6, (long int) 5, \
		  (long int) 4, (long int) 3, (long int) 2, \
		  (long int) 1, (long int) 0)
long int __psx_syscall(long int syscall_nr, ...);
long int psx_syscall3(long int syscall_nr,
		      long int arg1, long int arg2, long int arg3);
long int psx_syscall6(long int syscall_nr,
		      long int arg1, long int arg2, long int arg3,
		      long int arg4, long int arg5, long int arg6);

/*
 * This function should be used by systems to obtain pointers to the
 * two syscall functions provided by the PSX library. A linkage trick
 * is to define this function as weak in a library that can optionally
 * use libpsx and then, should the caller link -lpsx, that library can
 * implicitly use these POSIX semantics syscalls. See libcap for an
 * example of this usage.
 */
void psx_load_syscalls(long int (**syscall_fn)(long int,
					       long int, long int, long int),
		       long int (**syscall6_fn)(long int,
						long int, long int, long int,
						long int, long int, long int));

/*
 * psx_sensitivity_t holds the level of paranoia for non-POSIX syscall
 * behavior. The default is PSX_IGNORE: which is best effort - no
 * enforcement; PSX_WARNING will dump to stderr a warning when a
 * syscall's results differ; PSX_ERROR will dump info as per
 * PSX_WARNING and generate a SIGSYS. The current mode can be set with
 * psx_set_sensitivity().
 */
typedef enum {
    PSX_IGNORE = 0,
    PSX_WARNING = 1,
    PSX_ERROR = 2,
} psx_sensitivity_t;

/*
 * psx_set_sensitivity sets the current sensitivity of the PSX
 * mechanism.  The function returns 0 on success and -1 if the
 * requested level is invalid.
 */
int psx_set_sensitivity(psx_sensitivity_t level);

#ifdef __cplusplus
}
#endif

#endif /* _SYS_PSX_SYSCALL_H */