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1/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
2/*
3 * Syscall definitions for NOLIBC (those in man(2))
4 * Copyright (C) 2017-2021 Willy Tarreau <w@1wt.eu>
5 */
6
7#ifndef _NOLIBC_SYS_H
8#define _NOLIBC_SYS_H
9
10#include "std.h"
11
12/* system includes */
13#include <asm/unistd.h>
14#include <asm/signal.h> /* for SIGCHLD */
15#include <asm/ioctls.h>
16#include <asm/mman.h>
17#include <linux/fs.h>
18#include <linux/loop.h>
19#include <linux/time.h>
20#include <linux/auxvec.h>
21#include <linux/fcntl.h> /* for O_* and AT_* */
22#include <linux/stat.h> /* for statx() */
23#include <linux/prctl.h>
24#include <linux/resource.h>
25
26#include "arch.h"
27#include "errno.h"
28#include "stdarg.h"
29#include "types.h"
30
31
32/* Syscall return helper: takes the syscall value in argument and checks for an
33 * error in it. This may only be used with signed returns (int or long), but
34 * not with pointers. An error is any value < 0. When an error is encountered,
35 * -ret is set into errno and -1 is returned. Otherwise the returned value is
36 * passed as-is with its type preserved.
37 */
38
39#define __sysret(arg) \
40({ \
41 __typeof__(arg) __sysret_arg = (arg); \
42 (__sysret_arg < 0) /* error ? */ \
43 ? (({ SET_ERRNO(-__sysret_arg); }), -1) /* ret -1 with errno = -arg */ \
44 : __sysret_arg; /* return original value */ \
45})
46
47/* Syscall ENOSYS helper: Avoids unused-parameter warnings and provides a
48 * debugging hook.
49 */
50
51static __inline__ int __nolibc_enosys(const char *syscall, ...)
52{
53 (void)syscall;
54 return -ENOSYS;
55}
56
57
58/* Functions in this file only describe syscalls. They're declared static so
59 * that the compiler usually decides to inline them while still being allowed
60 * to pass a pointer to one of their instances. Each syscall exists in two
61 * versions:
62 * - the "internal" ones, which matches the raw syscall interface at the
63 * kernel level, which may sometimes slightly differ from the documented
64 * libc-level ones. For example most of them return either a valid value
65 * or -errno. All of these are prefixed with "sys_". They may be called
66 * by non-portable applications if desired.
67 *
68 * - the "exported" ones, whose interface must closely match the one
69 * documented in man(2), that applications are supposed to expect. These
70 * ones rely on the internal ones, and set errno.
71 *
72 * Each syscall will be defined with the two functions, sorted in alphabetical
73 * order applied to the exported names.
74 *
75 * In case of doubt about the relevance of a function here, only those which
76 * set errno should be defined here. Wrappers like those appearing in man(3)
77 * should not be placed here.
78 */
79
80
81/*
82 * int brk(void *addr);
83 * void *sbrk(intptr_t inc)
84 */
85
86static __attribute__((unused))
87void *sys_brk(void *addr)
88{
89 return (void *)my_syscall1(__NR_brk, addr);
90}
91
92static __attribute__((unused))
93int brk(void *addr)
94{
95 void *ret = sys_brk(addr);
96
97 if (!ret) {
98 SET_ERRNO(ENOMEM);
99 return -1;
100 }
101 return 0;
102}
103
104static __attribute__((unused))
105void *sbrk(intptr_t inc)
106{
107 /* first call to find current end */
108 void *ret = sys_brk(0);
109
110 if (ret && sys_brk(ret + inc) == ret + inc)
111 return ret + inc;
112
113 SET_ERRNO(ENOMEM);
114 return (void *)-1;
115}
116
117
118/*
119 * int chdir(const char *path);
120 */
121
122static __attribute__((unused))
123int sys_chdir(const char *path)
124{
125 return my_syscall1(__NR_chdir, path);
126}
127
128static __attribute__((unused))
129int chdir(const char *path)
130{
131 return __sysret(sys_chdir(path));
132}
133
134
135/*
136 * int chmod(const char *path, mode_t mode);
137 */
138
139static __attribute__((unused))
140int sys_chmod(const char *path, mode_t mode)
141{
142#ifdef __NR_fchmodat
143 return my_syscall4(__NR_fchmodat, AT_FDCWD, path, mode, 0);
144#elif defined(__NR_chmod)
145 return my_syscall2(__NR_chmod, path, mode);
146#else
147 return __nolibc_enosys(__func__, path, mode);
148#endif
149}
150
151static __attribute__((unused))
152int chmod(const char *path, mode_t mode)
153{
154 return __sysret(sys_chmod(path, mode));
155}
156
157
158/*
159 * int chown(const char *path, uid_t owner, gid_t group);
160 */
161
162static __attribute__((unused))
163int sys_chown(const char *path, uid_t owner, gid_t group)
164{
165#ifdef __NR_fchownat
166 return my_syscall5(__NR_fchownat, AT_FDCWD, path, owner, group, 0);
167#elif defined(__NR_chown)
168 return my_syscall3(__NR_chown, path, owner, group);
169#else
170 return __nolibc_enosys(__func__, path, owner, group);
171#endif
172}
173
174static __attribute__((unused))
175int chown(const char *path, uid_t owner, gid_t group)
176{
177 return __sysret(sys_chown(path, owner, group));
178}
179
180
181/*
182 * int chroot(const char *path);
183 */
184
185static __attribute__((unused))
186int sys_chroot(const char *path)
187{
188 return my_syscall1(__NR_chroot, path);
189}
190
191static __attribute__((unused))
192int chroot(const char *path)
193{
194 return __sysret(sys_chroot(path));
195}
196
197
198/*
199 * int close(int fd);
200 */
201
202static __attribute__((unused))
203int sys_close(int fd)
204{
205 return my_syscall1(__NR_close, fd);
206}
207
208static __attribute__((unused))
209int close(int fd)
210{
211 return __sysret(sys_close(fd));
212}
213
214
215/*
216 * int dup(int fd);
217 */
218
219static __attribute__((unused))
220int sys_dup(int fd)
221{
222 return my_syscall1(__NR_dup, fd);
223}
224
225static __attribute__((unused))
226int dup(int fd)
227{
228 return __sysret(sys_dup(fd));
229}
230
231
232/*
233 * int dup2(int old, int new);
234 */
235
236static __attribute__((unused))
237int sys_dup2(int old, int new)
238{
239#ifdef __NR_dup3
240 return my_syscall3(__NR_dup3, old, new, 0);
241#elif defined(__NR_dup2)
242 return my_syscall2(__NR_dup2, old, new);
243#else
244 return __nolibc_enosys(__func__, old, new);
245#endif
246}
247
248static __attribute__((unused))
249int dup2(int old, int new)
250{
251 return __sysret(sys_dup2(old, new));
252}
253
254
255/*
256 * int dup3(int old, int new, int flags);
257 */
258
259#ifdef __NR_dup3
260static __attribute__((unused))
261int sys_dup3(int old, int new, int flags)
262{
263 return my_syscall3(__NR_dup3, old, new, flags);
264}
265
266static __attribute__((unused))
267int dup3(int old, int new, int flags)
268{
269 return __sysret(sys_dup3(old, new, flags));
270}
271#endif
272
273
274/*
275 * int execve(const char *filename, char *const argv[], char *const envp[]);
276 */
277
278static __attribute__((unused))
279int sys_execve(const char *filename, char *const argv[], char *const envp[])
280{
281 return my_syscall3(__NR_execve, filename, argv, envp);
282}
283
284static __attribute__((unused))
285int execve(const char *filename, char *const argv[], char *const envp[])
286{
287 return __sysret(sys_execve(filename, argv, envp));
288}
289
290
291/*
292 * void exit(int status);
293 */
294
295static __attribute__((noreturn,unused))
296void sys_exit(int status)
297{
298 my_syscall1(__NR_exit, status & 255);
299 while(1); /* shut the "noreturn" warnings. */
300}
301
302static __attribute__((noreturn,unused))
303void exit(int status)
304{
305 sys_exit(status);
306}
307
308
309/*
310 * pid_t fork(void);
311 */
312
313#ifndef sys_fork
314static __attribute__((unused))
315pid_t sys_fork(void)
316{
317#ifdef __NR_clone
318 /* note: some archs only have clone() and not fork(). Different archs
319 * have a different API, but most archs have the flags on first arg and
320 * will not use the rest with no other flag.
321 */
322 return my_syscall5(__NR_clone, SIGCHLD, 0, 0, 0, 0);
323#elif defined(__NR_fork)
324 return my_syscall0(__NR_fork);
325#else
326 return __nolibc_enosys(__func__);
327#endif
328}
329#endif
330
331static __attribute__((unused))
332pid_t fork(void)
333{
334 return __sysret(sys_fork());
335}
336
337
338/*
339 * int fsync(int fd);
340 */
341
342static __attribute__((unused))
343int sys_fsync(int fd)
344{
345 return my_syscall1(__NR_fsync, fd);
346}
347
348static __attribute__((unused))
349int fsync(int fd)
350{
351 return __sysret(sys_fsync(fd));
352}
353
354
355/*
356 * int getdents64(int fd, struct linux_dirent64 *dirp, int count);
357 */
358
359static __attribute__((unused))
360int sys_getdents64(int fd, struct linux_dirent64 *dirp, int count)
361{
362 return my_syscall3(__NR_getdents64, fd, dirp, count);
363}
364
365static __attribute__((unused))
366int getdents64(int fd, struct linux_dirent64 *dirp, int count)
367{
368 return __sysret(sys_getdents64(fd, dirp, count));
369}
370
371
372/*
373 * uid_t geteuid(void);
374 */
375
376static __attribute__((unused))
377uid_t sys_geteuid(void)
378{
379#ifdef __NR_geteuid32
380 return my_syscall0(__NR_geteuid32);
381#else
382 return my_syscall0(__NR_geteuid);
383#endif
384}
385
386static __attribute__((unused))
387uid_t geteuid(void)
388{
389 return sys_geteuid();
390}
391
392
393/*
394 * pid_t getpgid(pid_t pid);
395 */
396
397static __attribute__((unused))
398pid_t sys_getpgid(pid_t pid)
399{
400 return my_syscall1(__NR_getpgid, pid);
401}
402
403static __attribute__((unused))
404pid_t getpgid(pid_t pid)
405{
406 return __sysret(sys_getpgid(pid));
407}
408
409
410/*
411 * pid_t getpgrp(void);
412 */
413
414static __attribute__((unused))
415pid_t sys_getpgrp(void)
416{
417 return sys_getpgid(0);
418}
419
420static __attribute__((unused))
421pid_t getpgrp(void)
422{
423 return sys_getpgrp();
424}
425
426
427/*
428 * pid_t getpid(void);
429 */
430
431static __attribute__((unused))
432pid_t sys_getpid(void)
433{
434 return my_syscall0(__NR_getpid);
435}
436
437static __attribute__((unused))
438pid_t getpid(void)
439{
440 return sys_getpid();
441}
442
443
444/*
445 * pid_t getppid(void);
446 */
447
448static __attribute__((unused))
449pid_t sys_getppid(void)
450{
451 return my_syscall0(__NR_getppid);
452}
453
454static __attribute__((unused))
455pid_t getppid(void)
456{
457 return sys_getppid();
458}
459
460
461/*
462 * pid_t gettid(void);
463 */
464
465static __attribute__((unused))
466pid_t sys_gettid(void)
467{
468 return my_syscall0(__NR_gettid);
469}
470
471static __attribute__((unused))
472pid_t gettid(void)
473{
474 return sys_gettid();
475}
476
477static unsigned long getauxval(unsigned long key);
478
479/*
480 * int getpagesize(void);
481 */
482
483static __attribute__((unused))
484int getpagesize(void)
485{
486 return __sysret((int)getauxval(AT_PAGESZ) ?: -ENOENT);
487}
488
489
490/*
491 * int gettimeofday(struct timeval *tv, struct timezone *tz);
492 */
493
494static __attribute__((unused))
495int sys_gettimeofday(struct timeval *tv, struct timezone *tz)
496{
497#ifdef __NR_gettimeofday
498 return my_syscall2(__NR_gettimeofday, tv, tz);
499#else
500 return __nolibc_enosys(__func__, tv, tz);
501#endif
502}
503
504static __attribute__((unused))
505int gettimeofday(struct timeval *tv, struct timezone *tz)
506{
507 return __sysret(sys_gettimeofday(tv, tz));
508}
509
510
511/*
512 * uid_t getuid(void);
513 */
514
515static __attribute__((unused))
516uid_t sys_getuid(void)
517{
518#ifdef __NR_getuid32
519 return my_syscall0(__NR_getuid32);
520#else
521 return my_syscall0(__NR_getuid);
522#endif
523}
524
525static __attribute__((unused))
526uid_t getuid(void)
527{
528 return sys_getuid();
529}
530
531
532/*
533 * int ioctl(int fd, unsigned long req, void *value);
534 */
535
536static __attribute__((unused))
537int sys_ioctl(int fd, unsigned long req, void *value)
538{
539 return my_syscall3(__NR_ioctl, fd, req, value);
540}
541
542static __attribute__((unused))
543int ioctl(int fd, unsigned long req, void *value)
544{
545 return __sysret(sys_ioctl(fd, req, value));
546}
547
548/*
549 * int kill(pid_t pid, int signal);
550 */
551
552static __attribute__((unused))
553int sys_kill(pid_t pid, int signal)
554{
555 return my_syscall2(__NR_kill, pid, signal);
556}
557
558static __attribute__((unused))
559int kill(pid_t pid, int signal)
560{
561 return __sysret(sys_kill(pid, signal));
562}
563
564
565/*
566 * int link(const char *old, const char *new);
567 */
568
569static __attribute__((unused))
570int sys_link(const char *old, const char *new)
571{
572#ifdef __NR_linkat
573 return my_syscall5(__NR_linkat, AT_FDCWD, old, AT_FDCWD, new, 0);
574#elif defined(__NR_link)
575 return my_syscall2(__NR_link, old, new);
576#else
577 return __nolibc_enosys(__func__, old, new);
578#endif
579}
580
581static __attribute__((unused))
582int link(const char *old, const char *new)
583{
584 return __sysret(sys_link(old, new));
585}
586
587
588/*
589 * off_t lseek(int fd, off_t offset, int whence);
590 */
591
592static __attribute__((unused))
593off_t sys_lseek(int fd, off_t offset, int whence)
594{
595#ifdef __NR_lseek
596 return my_syscall3(__NR_lseek, fd, offset, whence);
597#else
598 return __nolibc_enosys(__func__, fd, offset, whence);
599#endif
600}
601
602static __attribute__((unused))
603off_t lseek(int fd, off_t offset, int whence)
604{
605 return __sysret(sys_lseek(fd, offset, whence));
606}
607
608
609/*
610 * int mkdir(const char *path, mode_t mode);
611 */
612
613static __attribute__((unused))
614int sys_mkdir(const char *path, mode_t mode)
615{
616#ifdef __NR_mkdirat
617 return my_syscall3(__NR_mkdirat, AT_FDCWD, path, mode);
618#elif defined(__NR_mkdir)
619 return my_syscall2(__NR_mkdir, path, mode);
620#else
621 return __nolibc_enosys(__func__, path, mode);
622#endif
623}
624
625static __attribute__((unused))
626int mkdir(const char *path, mode_t mode)
627{
628 return __sysret(sys_mkdir(path, mode));
629}
630
631/*
632 * int rmdir(const char *path);
633 */
634
635static __attribute__((unused))
636int sys_rmdir(const char *path)
637{
638#ifdef __NR_rmdir
639 return my_syscall1(__NR_rmdir, path);
640#elif defined(__NR_unlinkat)
641 return my_syscall3(__NR_unlinkat, AT_FDCWD, path, AT_REMOVEDIR);
642#else
643 return __nolibc_enosys(__func__, path);
644#endif
645}
646
647static __attribute__((unused))
648int rmdir(const char *path)
649{
650 return __sysret(sys_rmdir(path));
651}
652
653
654/*
655 * int mknod(const char *path, mode_t mode, dev_t dev);
656 */
657
658static __attribute__((unused))
659long sys_mknod(const char *path, mode_t mode, dev_t dev)
660{
661#ifdef __NR_mknodat
662 return my_syscall4(__NR_mknodat, AT_FDCWD, path, mode, dev);
663#elif defined(__NR_mknod)
664 return my_syscall3(__NR_mknod, path, mode, dev);
665#else
666 return __nolibc_enosys(__func__, path, mode, dev);
667#endif
668}
669
670static __attribute__((unused))
671int mknod(const char *path, mode_t mode, dev_t dev)
672{
673 return __sysret(sys_mknod(path, mode, dev));
674}
675
676#ifndef sys_mmap
677static __attribute__((unused))
678void *sys_mmap(void *addr, size_t length, int prot, int flags, int fd,
679 off_t offset)
680{
681 int n;
682
683#if defined(__NR_mmap2)
684 n = __NR_mmap2;
685 offset >>= 12;
686#else
687 n = __NR_mmap;
688#endif
689
690 return (void *)my_syscall6(n, addr, length, prot, flags, fd, offset);
691}
692#endif
693
694/* Note that on Linux, MAP_FAILED is -1 so we can use the generic __sysret()
695 * which returns -1 upon error and still satisfy user land that checks for
696 * MAP_FAILED.
697 */
698
699static __attribute__((unused))
700void *mmap(void *addr, size_t length, int prot, int flags, int fd, off_t offset)
701{
702 void *ret = sys_mmap(addr, length, prot, flags, fd, offset);
703
704 if ((unsigned long)ret >= -4095UL) {
705 SET_ERRNO(-(long)ret);
706 ret = MAP_FAILED;
707 }
708 return ret;
709}
710
711static __attribute__((unused))
712int sys_munmap(void *addr, size_t length)
713{
714 return my_syscall2(__NR_munmap, addr, length);
715}
716
717static __attribute__((unused))
718int munmap(void *addr, size_t length)
719{
720 return __sysret(sys_munmap(addr, length));
721}
722
723/*
724 * int mount(const char *source, const char *target,
725 * const char *fstype, unsigned long flags,
726 * const void *data);
727 */
728static __attribute__((unused))
729int sys_mount(const char *src, const char *tgt, const char *fst,
730 unsigned long flags, const void *data)
731{
732 return my_syscall5(__NR_mount, src, tgt, fst, flags, data);
733}
734
735static __attribute__((unused))
736int mount(const char *src, const char *tgt,
737 const char *fst, unsigned long flags,
738 const void *data)
739{
740 return __sysret(sys_mount(src, tgt, fst, flags, data));
741}
742
743
744/*
745 * int open(const char *path, int flags[, mode_t mode]);
746 */
747
748static __attribute__((unused))
749int sys_open(const char *path, int flags, mode_t mode)
750{
751#ifdef __NR_openat
752 return my_syscall4(__NR_openat, AT_FDCWD, path, flags, mode);
753#elif defined(__NR_open)
754 return my_syscall3(__NR_open, path, flags, mode);
755#else
756 return __nolibc_enosys(__func__, path, flags, mode);
757#endif
758}
759
760static __attribute__((unused))
761int open(const char *path, int flags, ...)
762{
763 mode_t mode = 0;
764
765 if (flags & O_CREAT) {
766 va_list args;
767
768 va_start(args, flags);
769 mode = va_arg(args, int);
770 va_end(args);
771 }
772
773 return __sysret(sys_open(path, flags, mode));
774}
775
776
777/*
778 * int pipe2(int pipefd[2], int flags);
779 * int pipe(int pipefd[2]);
780 */
781
782static __attribute__((unused))
783int sys_pipe2(int pipefd[2], int flags)
784{
785 return my_syscall2(__NR_pipe2, pipefd, flags);
786}
787
788static __attribute__((unused))
789int pipe2(int pipefd[2], int flags)
790{
791 return __sysret(sys_pipe2(pipefd, flags));
792}
793
794static __attribute__((unused))
795int pipe(int pipefd[2])
796{
797 return pipe2(pipefd, 0);
798}
799
800
801/*
802 * int prctl(int option, unsigned long arg2, unsigned long arg3,
803 * unsigned long arg4, unsigned long arg5);
804 */
805
806static __attribute__((unused))
807int sys_prctl(int option, unsigned long arg2, unsigned long arg3,
808 unsigned long arg4, unsigned long arg5)
809{
810 return my_syscall5(__NR_prctl, option, arg2, arg3, arg4, arg5);
811}
812
813static __attribute__((unused))
814int prctl(int option, unsigned long arg2, unsigned long arg3,
815 unsigned long arg4, unsigned long arg5)
816{
817 return __sysret(sys_prctl(option, arg2, arg3, arg4, arg5));
818}
819
820
821/*
822 * int pivot_root(const char *new, const char *old);
823 */
824
825static __attribute__((unused))
826int sys_pivot_root(const char *new, const char *old)
827{
828 return my_syscall2(__NR_pivot_root, new, old);
829}
830
831static __attribute__((unused))
832int pivot_root(const char *new, const char *old)
833{
834 return __sysret(sys_pivot_root(new, old));
835}
836
837
838/*
839 * int poll(struct pollfd *fds, int nfds, int timeout);
840 */
841
842static __attribute__((unused))
843int sys_poll(struct pollfd *fds, int nfds, int timeout)
844{
845#if defined(__NR_ppoll)
846 struct timespec t;
847
848 if (timeout >= 0) {
849 t.tv_sec = timeout / 1000;
850 t.tv_nsec = (timeout % 1000) * 1000000;
851 }
852 return my_syscall5(__NR_ppoll, fds, nfds, (timeout >= 0) ? &t : NULL, NULL, 0);
853#elif defined(__NR_poll)
854 return my_syscall3(__NR_poll, fds, nfds, timeout);
855#else
856 return __nolibc_enosys(__func__, fds, nfds, timeout);
857#endif
858}
859
860static __attribute__((unused))
861int poll(struct pollfd *fds, int nfds, int timeout)
862{
863 return __sysret(sys_poll(fds, nfds, timeout));
864}
865
866
867/*
868 * ssize_t read(int fd, void *buf, size_t count);
869 */
870
871static __attribute__((unused))
872ssize_t sys_read(int fd, void *buf, size_t count)
873{
874 return my_syscall3(__NR_read, fd, buf, count);
875}
876
877static __attribute__((unused))
878ssize_t read(int fd, void *buf, size_t count)
879{
880 return __sysret(sys_read(fd, buf, count));
881}
882
883
884/*
885 * int reboot(int cmd);
886 * <cmd> is among LINUX_REBOOT_CMD_*
887 */
888
889static __attribute__((unused))
890ssize_t sys_reboot(int magic1, int magic2, int cmd, void *arg)
891{
892 return my_syscall4(__NR_reboot, magic1, magic2, cmd, arg);
893}
894
895static __attribute__((unused))
896int reboot(int cmd)
897{
898 return __sysret(sys_reboot(LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, cmd, 0));
899}
900
901
902/*
903 * int getrlimit(int resource, struct rlimit *rlim);
904 * int setrlimit(int resource, const struct rlimit *rlim);
905 */
906
907static __attribute__((unused))
908int sys_prlimit64(pid_t pid, int resource,
909 const struct rlimit64 *new_limit, struct rlimit64 *old_limit)
910{
911 return my_syscall4(__NR_prlimit64, pid, resource, new_limit, old_limit);
912}
913
914static __attribute__((unused))
915int getrlimit(int resource, struct rlimit *rlim)
916{
917 struct rlimit64 rlim64;
918 int ret;
919
920 ret = __sysret(sys_prlimit64(0, resource, NULL, &rlim64));
921 rlim->rlim_cur = rlim64.rlim_cur;
922 rlim->rlim_max = rlim64.rlim_max;
923
924 return ret;
925}
926
927static __attribute__((unused))
928int setrlimit(int resource, const struct rlimit *rlim)
929{
930 struct rlimit64 rlim64 = {
931 .rlim_cur = rlim->rlim_cur,
932 .rlim_max = rlim->rlim_max,
933 };
934
935 return __sysret(sys_prlimit64(0, resource, &rlim64, NULL));
936}
937
938
939/*
940 * int sched_yield(void);
941 */
942
943static __attribute__((unused))
944int sys_sched_yield(void)
945{
946 return my_syscall0(__NR_sched_yield);
947}
948
949static __attribute__((unused))
950int sched_yield(void)
951{
952 return __sysret(sys_sched_yield());
953}
954
955
956/*
957 * int select(int nfds, fd_set *read_fds, fd_set *write_fds,
958 * fd_set *except_fds, struct timeval *timeout);
959 */
960
961static __attribute__((unused))
962int sys_select(int nfds, fd_set *rfds, fd_set *wfds, fd_set *efds, struct timeval *timeout)
963{
964#if defined(__ARCH_WANT_SYS_OLD_SELECT) && !defined(__NR__newselect)
965 struct sel_arg_struct {
966 unsigned long n;
967 fd_set *r, *w, *e;
968 struct timeval *t;
969 } arg = { .n = nfds, .r = rfds, .w = wfds, .e = efds, .t = timeout };
970 return my_syscall1(__NR_select, &arg);
971#elif defined(__NR__newselect)
972 return my_syscall5(__NR__newselect, nfds, rfds, wfds, efds, timeout);
973#elif defined(__NR_select)
974 return my_syscall5(__NR_select, nfds, rfds, wfds, efds, timeout);
975#elif defined(__NR_pselect6)
976 struct timespec t;
977
978 if (timeout) {
979 t.tv_sec = timeout->tv_sec;
980 t.tv_nsec = timeout->tv_usec * 1000;
981 }
982 return my_syscall6(__NR_pselect6, nfds, rfds, wfds, efds, timeout ? &t : NULL, NULL);
983#else
984 return __nolibc_enosys(__func__, nfds, rfds, wfds, efds, timeout);
985#endif
986}
987
988static __attribute__((unused))
989int select(int nfds, fd_set *rfds, fd_set *wfds, fd_set *efds, struct timeval *timeout)
990{
991 return __sysret(sys_select(nfds, rfds, wfds, efds, timeout));
992}
993
994
995/*
996 * int setpgid(pid_t pid, pid_t pgid);
997 */
998
999static __attribute__((unused))
1000int sys_setpgid(pid_t pid, pid_t pgid)
1001{
1002 return my_syscall2(__NR_setpgid, pid, pgid);
1003}
1004
1005static __attribute__((unused))
1006int setpgid(pid_t pid, pid_t pgid)
1007{
1008 return __sysret(sys_setpgid(pid, pgid));
1009}
1010
1011
1012/*
1013 * pid_t setsid(void);
1014 */
1015
1016static __attribute__((unused))
1017pid_t sys_setsid(void)
1018{
1019 return my_syscall0(__NR_setsid);
1020}
1021
1022static __attribute__((unused))
1023pid_t setsid(void)
1024{
1025 return __sysret(sys_setsid());
1026}
1027
1028/*
1029 * int statx(int fd, const char *path, int flags, unsigned int mask, struct statx *buf);
1030 * int stat(const char *path, struct stat *buf);
1031 */
1032
1033static __attribute__((unused))
1034int sys_statx(int fd, const char *path, int flags, unsigned int mask, struct statx *buf)
1035{
1036#ifdef __NR_statx
1037 return my_syscall5(__NR_statx, fd, path, flags, mask, buf);
1038#else
1039 return __nolibc_enosys(__func__, fd, path, flags, mask, buf);
1040#endif
1041}
1042
1043static __attribute__((unused))
1044int statx(int fd, const char *path, int flags, unsigned int mask, struct statx *buf)
1045{
1046 return __sysret(sys_statx(fd, path, flags, mask, buf));
1047}
1048
1049
1050static __attribute__((unused))
1051int stat(const char *path, struct stat *buf)
1052{
1053 struct statx statx;
1054 long ret;
1055
1056 ret = __sysret(sys_statx(AT_FDCWD, path, AT_NO_AUTOMOUNT, STATX_BASIC_STATS, &statx));
1057 if (ret == -1)
1058 return ret;
1059
1060 buf->st_dev = ((statx.stx_dev_minor & 0xff)
1061 | (statx.stx_dev_major << 8)
1062 | ((statx.stx_dev_minor & ~0xff) << 12));
1063 buf->st_ino = statx.stx_ino;
1064 buf->st_mode = statx.stx_mode;
1065 buf->st_nlink = statx.stx_nlink;
1066 buf->st_uid = statx.stx_uid;
1067 buf->st_gid = statx.stx_gid;
1068 buf->st_rdev = ((statx.stx_rdev_minor & 0xff)
1069 | (statx.stx_rdev_major << 8)
1070 | ((statx.stx_rdev_minor & ~0xff) << 12));
1071 buf->st_size = statx.stx_size;
1072 buf->st_blksize = statx.stx_blksize;
1073 buf->st_blocks = statx.stx_blocks;
1074 buf->st_atim.tv_sec = statx.stx_atime.tv_sec;
1075 buf->st_atim.tv_nsec = statx.stx_atime.tv_nsec;
1076 buf->st_mtim.tv_sec = statx.stx_mtime.tv_sec;
1077 buf->st_mtim.tv_nsec = statx.stx_mtime.tv_nsec;
1078 buf->st_ctim.tv_sec = statx.stx_ctime.tv_sec;
1079 buf->st_ctim.tv_nsec = statx.stx_ctime.tv_nsec;
1080
1081 return 0;
1082}
1083
1084
1085/*
1086 * int symlink(const char *old, const char *new);
1087 */
1088
1089static __attribute__((unused))
1090int sys_symlink(const char *old, const char *new)
1091{
1092#ifdef __NR_symlinkat
1093 return my_syscall3(__NR_symlinkat, old, AT_FDCWD, new);
1094#elif defined(__NR_symlink)
1095 return my_syscall2(__NR_symlink, old, new);
1096#else
1097 return __nolibc_enosys(__func__, old, new);
1098#endif
1099}
1100
1101static __attribute__((unused))
1102int symlink(const char *old, const char *new)
1103{
1104 return __sysret(sys_symlink(old, new));
1105}
1106
1107
1108/*
1109 * mode_t umask(mode_t mode);
1110 */
1111
1112static __attribute__((unused))
1113mode_t sys_umask(mode_t mode)
1114{
1115 return my_syscall1(__NR_umask, mode);
1116}
1117
1118static __attribute__((unused))
1119mode_t umask(mode_t mode)
1120{
1121 return sys_umask(mode);
1122}
1123
1124
1125/*
1126 * int umount2(const char *path, int flags);
1127 */
1128
1129static __attribute__((unused))
1130int sys_umount2(const char *path, int flags)
1131{
1132 return my_syscall2(__NR_umount2, path, flags);
1133}
1134
1135static __attribute__((unused))
1136int umount2(const char *path, int flags)
1137{
1138 return __sysret(sys_umount2(path, flags));
1139}
1140
1141
1142/*
1143 * int unlink(const char *path);
1144 */
1145
1146static __attribute__((unused))
1147int sys_unlink(const char *path)
1148{
1149#ifdef __NR_unlinkat
1150 return my_syscall3(__NR_unlinkat, AT_FDCWD, path, 0);
1151#elif defined(__NR_unlink)
1152 return my_syscall1(__NR_unlink, path);
1153#else
1154 return __nolibc_enosys(__func__, path);
1155#endif
1156}
1157
1158static __attribute__((unused))
1159int unlink(const char *path)
1160{
1161 return __sysret(sys_unlink(path));
1162}
1163
1164
1165/*
1166 * pid_t wait(int *status);
1167 * pid_t wait4(pid_t pid, int *status, int options, struct rusage *rusage);
1168 * pid_t waitpid(pid_t pid, int *status, int options);
1169 */
1170
1171static __attribute__((unused))
1172pid_t sys_wait4(pid_t pid, int *status, int options, struct rusage *rusage)
1173{
1174#ifdef __NR_wait4
1175 return my_syscall4(__NR_wait4, pid, status, options, rusage);
1176#else
1177 return __nolibc_enosys(__func__, pid, status, options, rusage);
1178#endif
1179}
1180
1181static __attribute__((unused))
1182pid_t wait(int *status)
1183{
1184 return __sysret(sys_wait4(-1, status, 0, NULL));
1185}
1186
1187static __attribute__((unused))
1188pid_t wait4(pid_t pid, int *status, int options, struct rusage *rusage)
1189{
1190 return __sysret(sys_wait4(pid, status, options, rusage));
1191}
1192
1193
1194static __attribute__((unused))
1195pid_t waitpid(pid_t pid, int *status, int options)
1196{
1197 return __sysret(sys_wait4(pid, status, options, NULL));
1198}
1199
1200
1201/*
1202 * ssize_t write(int fd, const void *buf, size_t count);
1203 */
1204
1205static __attribute__((unused))
1206ssize_t sys_write(int fd, const void *buf, size_t count)
1207{
1208 return my_syscall3(__NR_write, fd, buf, count);
1209}
1210
1211static __attribute__((unused))
1212ssize_t write(int fd, const void *buf, size_t count)
1213{
1214 return __sysret(sys_write(fd, buf, count));
1215}
1216
1217
1218/*
1219 * int memfd_create(const char *name, unsigned int flags);
1220 */
1221
1222static __attribute__((unused))
1223int sys_memfd_create(const char *name, unsigned int flags)
1224{
1225 return my_syscall2(__NR_memfd_create, name, flags);
1226}
1227
1228static __attribute__((unused))
1229int memfd_create(const char *name, unsigned int flags)
1230{
1231 return __sysret(sys_memfd_create(name, flags));
1232}
1233
1234/* make sure to include all global symbols */
1235#include "nolibc.h"
1236
1237#endif /* _NOLIBC_SYS_H */