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/* libc/sys/linux/process.c - Process-related system calls */
/* Written 2000 by Werner Almesberger */
#include <sys/unistd.h>
#include <sys/wait.h>
#include <machine/syscall.h>
#define __NR__exit __NR_exit
#define __NR__execve __NR_execve
_syscall0(int,fork)
_syscall3(int,_execve,const char *,file,char * const *,argv,char * const *,envp)
_syscall0(int,getpid)
_syscall2(int,setpgid,pid_t,pid,pid_t,pgid)
_syscall0(pid_t,getppid)
_syscall0(pid_t,getpgrp)
_syscall0(pid_t,setsid)
weak_alias(__libc_getpid,__getpid);
/* Here we implement vfork in terms of fork, since
* Linux's vfork system call is not reliable.
*/
pid_t vfork(void)
{
pid_t pid;
pid = fork();
if(!pid)
{
/* In child. */
return 0;
}
else
{
/* In parent. Wait for child to finish. */
if (waitpid (pid, NULL, 0) < 0)
return pid;
}
}
/* FIXME: get rid of noreturn warning */
#define return for (;;)
_syscall1(void,_exit,int,exitcode)
#undef return
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