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/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
/*
* wait definitions for NOLIBC
* Copyright (C) 2017-2021 Willy Tarreau <w@1wt.eu>
*/
/* make sure to include all global symbols */
#include "../nolibc.h"
#ifndef _NOLIBC_SYS_WAIT_H
#define _NOLIBC_SYS_WAIT_H
#include "../arch.h"
#include "../std.h"
#include "../types.h"
/*
* pid_t wait(int *status);
* pid_t wait4(pid_t pid, int *status, int options, struct rusage *rusage);
* pid_t waitpid(pid_t pid, int *status, int options);
* int waitid(idtype_t idtype, id_t id, siginfo_t *infop, int options);
*/
static __attribute__((unused))
pid_t sys_wait4(pid_t pid, int *status, int options, struct rusage *rusage)
{
#ifdef __NR_wait4
return my_syscall4(__NR_wait4, pid, status, options, rusage);
#else
return __nolibc_enosys(__func__, pid, status, options, rusage);
#endif
}
static __attribute__((unused))
pid_t wait4(pid_t pid, int *status, int options, struct rusage *rusage)
{
return __sysret(sys_wait4(pid, status, options, rusage));
}
static __attribute__((unused))
int sys_waitid(int which, pid_t pid, siginfo_t *infop, int options, struct rusage *rusage)
{
return my_syscall5(__NR_waitid, which, pid, infop, options, rusage);
}
static __attribute__((unused))
int waitid(int which, pid_t pid, siginfo_t *infop, int options)
{
return __sysret(sys_waitid(which, pid, infop, options, NULL));
}
static __attribute__((unused))
pid_t waitpid(pid_t pid, int *status, int options)
{
int idtype, ret;
siginfo_t info;
pid_t id;
if (pid == INT_MIN) {
SET_ERRNO(ESRCH);
return -1;
} else if (pid < -1) {
idtype = P_PGID;
id = -pid;
} else if (pid == -1) {
idtype = P_ALL;
id = 0;
} else if (pid == 0) {
idtype = P_PGID;
id = 0;
} else {
idtype = P_PID;
id = pid;
}
options |= WEXITED;
ret = waitid(idtype, id, &info, options);
if (ret)
return ret;
switch (info.si_code) {
case 0:
*status = 0;
break;
case CLD_EXITED:
*status = (info.si_status & 0xff) << 8;
break;
case CLD_KILLED:
*status = info.si_status & 0x7f;
break;
case CLD_DUMPED:
*status = (info.si_status & 0x7f) | 0x80;
break;
case CLD_STOPPED:
case CLD_TRAPPED:
*status = (info.si_status << 8) + 0x7f;
break;
case CLD_CONTINUED:
*status = 0xffff;
break;
default:
return -1;
}
return info.si_pid;
}
static __attribute__((unused))
pid_t wait(int *status)
{
return waitpid(-1, status, 0);
}
#endif /* _NOLIBC_SYS_WAIT_H */
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