200 lines
4.1 KiB
C
200 lines
4.1 KiB
C
/* -*-comment-start: "//";comment-end:""-*-
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* GNU Mes --- Maxwell Equations of Software
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* Copyright © 2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
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*
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* This file is part of GNU Mes.
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*
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* GNU Mes is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or (at
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* your option) any later version.
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*
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* GNU Mes is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <sys/resource.h>
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#include <time.h>
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int
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link (char const *old_name, char const *new_name)
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{
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return _sys_call2 (SYS_link, (long)old_name, (long)new_name);
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}
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pid_t
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getpid ()
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{
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return _sys_call (SYS_getpid);
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}
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uid_t
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getuid ()
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{
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return _sys_call (SYS_getuid);
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}
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int
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kill (pid_t pid, int signum)
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{
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return _sys_call2 (SYS_kill, (long)pid, (long)signum);
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}
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int
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rename (char const *old_name, char const *new_name)
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{
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return _sys_call2 (SYS_rename, (long)old_name, (long)new_name);
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}
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int
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mkdir (char const *file_name, mode_t mode)
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{
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return _sys_call2 (SYS_mkdir, (long)file_name, (long)mode);
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}
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gid_t
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getgid ()
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{
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return _sys_call (SYS_getgid);
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}
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// long _sys_call (long sys_call);
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// long _sys_call4 (long sys_call, long one, long two, long three, long four);
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#define SA_SIGINFO 4
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#define SA_RESTORER 0x04000000
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#define SYS_rt_sigreturn 15
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void
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_restorer (void)
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{
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_sys_call (SYS_rt_sigreturn);
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}
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# define __sigmask(sig) \
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(((unsigned long int) 1) << (((sig) - 1) % (8 * sizeof (unsigned long int))))
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sighandler_t
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signal (int signum, sighandler_t action)
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{
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#if __i386__
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return _sys_call2 (SYS_signal, signum, action);
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#else
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static struct sigaction setup_action = {-1};
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static struct sigaction old = {0};
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setup_action.sa_handler = action;
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setup_action.sa_restorer = _restorer;
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setup_action.sa_mask = __sigmask (signum);
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old.sa_handler = SIG_DFL;
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setup_action.sa_flags = SA_RESTORER | SA_RESTART;
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int r = _sys_call4 (SYS_rt_sigaction, signum, &setup_action, &old, sizeof (sigset_t));
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if (r)
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return 0;
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return old.sa_handler;
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#endif
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}
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int
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fcntl (int filedes, int command, ...)
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{
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va_list ap;
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va_start (ap, command);
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int data = va_arg (ap, int);
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int r = _sys_call3 (SYS_fcntl, (int)filedes, (int)command, (int)data);
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va_end (ap);
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return r;
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}
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int
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pipe (int filedes[2])
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{
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return _sys_call1 (SYS_pipe, (long)filedes);
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}
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int
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getrusage (int processes, struct rusage *rusage)
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{
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return _sys_call2 (SYS_getrusage, (int)processes, (long)rusage);
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}
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int
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lstat (char const *file_name, struct stat *statbuf)
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{
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return _sys_call2 (SYS_lstat, (long)file_name, (long)statbuf);
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}
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int
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nanosleep (const struct timespec *requested_time,
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struct timespec *remaining)
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{
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return _sys_call2 (SYS_nanosleep, (long)requested_time, (long)remaining);
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}
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int
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setitimer (int which, struct itimerval const *new,
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struct itimerval *old)
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{
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return _sys_call3 (SYS_setitimer, (long)which, (long)new, (long)old);
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}
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int
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fstat (int filedes, struct stat *statbuf)
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{
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return _sys_call2 (SYS_fstat, (int)filedes, (long)statbuf);
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}
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int
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getdents (int filedes, char *buffer, size_t nbytes)
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{
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return _sys_call3 (SYS_getdents, (int)filedes, (long)buffer, (long)nbytes);
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}
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int
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chdir (char const *file_name)
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{
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return _sys_call1 (SYS_chdir, (long)file_name);
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}
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// bash
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uid_t
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geteuid ()
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{
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return _sys_call (SYS_geteuid);
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}
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gid_t
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getegid ()
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{
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return _sys_call (SYS_getegid);
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}
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int
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setuid (uid_t newuid)
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{
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return _sys_call1 (SYS_setuid, (long)newuid);
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}
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int
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setgid (gid_t newgid)
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{
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return _sys_call1 (SYS_setgid, (long)newgid);
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}
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// make+POSIX
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int
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sigprocmask (int how, sigset_t const *set, sigset_t *oldset)
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{
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#if __i386__
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return _sys_call3 (SYS_sigprocmask, (long)how, (long)set, (long)oldset);
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#else
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return _sys_call3 (SYS_rt_sigprocmask, (long)how, (long)set, (long)oldset);
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#endif
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}
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