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<sys/wait.h>

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Change-Id: I24605df209d012e99333065428a3ed2752799321
This commit is contained in:
Ben Gras 2013-11-22 16:03:53 +01:00 committed by Lionel Sambuc
parent 78da142dab
commit 256829c7e8
6 changed files with 123 additions and 35 deletions
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2
servers/pm/const.h
View file

@ -10,8 +10,6 @@
#define NO_TRACER 0 /* process is not being traced */
#define DUMPED 0200 /* bit set in status when core dumped */
#define MAX_CLOCK_T ((unsigned long) 1 << ((sizeof(clock_t) * 8) - 1))
#define MAX_SECS ( (clock_t) (MAX_CLOCK_T/system_hz) )
/* max.secs for setitimer() ((2^31-1)/HZ) */

7
servers/pm/forkexit.c
View file

@ -499,8 +499,7 @@ int do_waitpid()
if (sigismember(&rp->mp_sigtrace, i)) {
sigdelset(&rp->mp_sigtrace, i);
mp->mp_reply.PM_WAITPID_STATUS =
0177 | (i << 8);
mp->mp_reply.PM_WAITPID_STATUS = W_STOPCODE(i);
return(rp->mp_pid);
}
}
@ -649,7 +648,7 @@ register struct mproc *child; /* tells which process is exiting */
/* Wake up the parent by sending the reply message. */
parent->mp_reply.PM_WAITPID_STATUS =
(child->mp_exitstatus << 8) | (child->mp_sigstatus & 0377);
W_EXITCODE(child->mp_exitstatus, child->mp_sigstatus);
reply(child->mp_parent, child->mp_pid);
parent->mp_flags &= ~WAITING; /* parent no longer waiting */
child->mp_flags &= ~ZOMBIE; /* child no longer a zombie */
@ -673,7 +672,7 @@ struct mproc *child; /* tells which process is exiting */
tracer = &mproc[mp_tracer];
tracer->mp_reply.PM_WAITPID_STATUS =
(child->mp_exitstatus << 8) | (child->mp_sigstatus & 0377);
W_EXITCODE(child->mp_exitstatus, (child->mp_sigstatus & 0377));
reply(child->mp_tracer, child->mp_pid);
tracer->mp_flags &= ~WAITING; /* tracer no longer waiting */
child->mp_flags &= ~TRACE_ZOMBIE; /* child no longer zombie to tracer */

3
servers/pm/main.c
View file

@ -23,6 +23,7 @@
#include <fcntl.h>
#include <sys/resource.h>
#include <sys/utsname.h>
#include <sys/wait.h>
#include <machine/archtypes.h>
#include <env.h>
#include <assert.h>
@ -359,7 +360,7 @@ static void handle_vfs_reply()
case VFS_PM_CORE_REPLY:
if (m_in.VFS_PM_STATUS == OK)
rmp->mp_sigstatus |= DUMPED;
rmp->mp_sigstatus |= WCOREFLAG;
exit_restart(rmp, TRUE /*dump_core*/);

3
servers/pm/trace.c
View file

@ -31,6 +31,7 @@
#include <minix/com.h>
#include <minix/callnr.h>
#include <sys/ptrace.h>
#include <sys/wait.h>
#include <signal.h>
#include "mproc.h"
@ -267,7 +268,7 @@ int signo;
sigdelset(&rmp->mp_sigtrace, signo);
rpmp->mp_flags &= ~WAITING; /* parent is no longer waiting */
rpmp->mp_reply.PM_WAITPID_STATUS = 0177 | (signo << 8);
rpmp->mp_reply.PM_WAITPID_STATUS = W_STOPCODE(signo);
reply(rmp->mp_tracer, rmp->mp_pid);
}
}

139
sys/sys/wait.h
View file

@ -34,42 +34,41 @@
#ifndef _SYS_WAIT_H_
#define _SYS_WAIT_H_
#include <sys/cdefs.h>
#include <sys/types.h>
#include <sys/featuretest.h>
/* The <sys/wait.h> header contains macros related to wait(). The value
* returned by wait() and waitpid() depends on whether the process
* terminated by an exit() call, was killed by a signal, or was stopped
* due to job control, as follows:
*
* High byte Low byte
* +---------------------+
* exit(status) | status | 0 |
* +---------------------+
* killed by signal | 0 | signal |
* +---------------------+
* stopped (job control) | signal | 0177 |
* +---------------------+
/*
* This file holds definitions relevent to the wait4 system call
* and the alternate interfaces that use it (wait, wait3, waitpid).
*/
/*
* Macros to test the exit status returned by wait
* and extract the relevant values.
*/
#if !( defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE) ) || defined(_KERNEL)
#define _W_INT(i) (i)
#else
#define _W_INT(w) (*(int *)(void *)&(w)) /* convert union wait to int */
#endif
#define _LOW(v) ( (v) & 0377)
#define _HIGH(v) ( ((v) >> 8) & 0377)
#define _WSTATUS(x) (_W_INT(x) & 0177)
#define _WSTOPPED 0177 /* _WSTATUS if process is stopped */
#define WIFSTOPPED(x) (_WSTATUS(x) == _WSTOPPED)
#define WSTOPSIG(x) ((int)(((unsigned int)_W_INT(x)) >> 8) & 0xff)
#define WIFSIGNALED(x) (_WSTATUS(x) != _WSTOPPED && _WSTATUS(x) != 0)
#define WTERMSIG(x) (_WSTATUS(x))
#define WIFEXITED(x) (_WSTATUS(x) == 0)
#define WEXITSTATUS(x) ((int)(((unsigned int)_W_INT(x)) >> 8) & 0xff)
#if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE) || defined(_KERNEL)
#define WCOREFLAG 0200
#define WCOREDUMP(x) (_W_INT(x) & WCOREFLAG)
#define WIFEXITED(s) (_LOW(s) == 0) /* normal exit */
#define WEXITSTATUS(s) (_HIGH(s)) /* exit status */
#define WTERMSIG(s) (_LOW(s) & 0177) /* sig value */
#define WIFSIGNALED(s) ((((unsigned int)(s)-1) & 0xFFFFU) < 0xFFU) /* signaled */
#define WIFSTOPPED(s) (_LOW(s) == 0177) /* stopped */
#define WSTOPSIG(s) (_HIGH(s) & 0377) /* stop signal */
#define W_EXITCODE(ret, sig) ((ret) << 8 | (sig))
#define W_STOPCODE(sig) ((sig) << 8 | _WSTOPPED)
#endif
/*
* Option bits for the third argument of waitpid. WNOHANG causes the
* Option bits for the third argument of wait4. WNOHANG causes the
* wait to not hang if there are no stopped or terminated processes, rather
* returning an error indication in this case (pid==0). WUNTRACED
* indicates that the caller should receive status about untraced children
@ -80,18 +79,108 @@
#define WNOHANG 0x00000001 /* don't hang in wait */
#define WUNTRACED 0x00000002 /* tell about stopped,
untraced children */
#if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
#define WALTSIG 0x00000004 /* wait for processes that exit
with an alternate signal (i.e.
not SIGCHLD) */
#define WALLSIG 0x00000008 /* wait for processes that exit
with any signal, i.e. SIGCHLD
and alternates */
/*
* These are the Linux names of some of the above flags, for compatibility
* with Linux's clone(2) API.
*/
#define __WCLONE WALTSIG
#define __WALL WALLSIG
/*
* These bits are used in order to support SVR4 (etc) functionality
* without replicating sys_wait4 5 times.
*/
#define WNOWAIT 0x00010000 /* Don't mark child 'P_WAITED' */
#define WNOZOMBIE 0x00020000 /* Ignore zombies */
#define WOPTSCHECKED 0x00040000 /* Compat call, options verified */
#endif /* _XOPEN_SOURCE || _NETBSD_SOURCE */
#if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
/* POSIX extensions and 4.2/4.3 compatibility: */
/*
* Tokens for special values of the "pid" parameter to waitpid.
* Tokens for special values of the "pid" parameter to wait4.
*/
#define WAIT_ANY (-1) /* any process */
#define WAIT_MYPGRP 0 /* any process in my process group */
#include <sys/types.h>
/*
* Deprecated:
* Structure of the information in the status word returned by wait4.
* If w_stopval==WSTOPPED, then the second structure describes
* the information returned, else the first.
*/
union wait {
int w_status; /* used in syscall */
/*
* Terminated process status.
*/
struct {
#if BYTE_ORDER == LITTLE_ENDIAN
unsigned int w_Termsig:7, /* termination signal */
w_Coredump:1, /* core dump indicator */
w_Retcode:8, /* exit code if w_termsig==0 */
w_Filler:16; /* upper bits filler */
#endif
#if BYTE_ORDER == BIG_ENDIAN
unsigned int w_Filler:16, /* upper bits filler */
w_Retcode:8, /* exit code if w_termsig==0 */
w_Coredump:1, /* core dump indicator */
w_Termsig:7; /* termination signal */
#endif
} w_T;
/*
* Stopped process status. Returned
* only for traced children unless requested
* with the WUNTRACED option bit.
*/
struct {
#if BYTE_ORDER == LITTLE_ENDIAN
unsigned int w_Stopval:8, /* == W_STOPPED if stopped */
w_Stopsig:8, /* signal that stopped us */
w_Filler:16; /* upper bits filler */
#endif
#if BYTE_ORDER == BIG_ENDIAN
unsigned int w_Filler:16, /* upper bits filler */
w_Stopsig:8, /* signal that stopped us */
w_Stopval:8; /* == W_STOPPED if stopped */
#endif
} w_S;
};
#define w_termsig w_T.w_Termsig
#define w_coredump w_T.w_Coredump
#define w_retcode w_T.w_Retcode
#define w_stopval w_S.w_Stopval
#define w_stopsig w_S.w_Stopsig
#define WSTOPPED _WSTOPPED
#endif /* _XOPEN_SOURCE || _NETBSD_SOURCE */
#ifndef _KERNEL
#include <sys/cdefs.h>
__BEGIN_DECLS
struct rusage; /* forward declaration */
pid_t wait(int *);
pid_t waitpid(pid_t, int *, int);
#if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
#ifndef __LIBC12_SOURCE__
pid_t wait3(int *, int, struct rusage *) __RENAME(__wait350);
pid_t wait4(pid_t, int *, int, struct rusage *) __RENAME(__wait450);
#endif
#endif
__END_DECLS
#endif
#endif /* !_SYS_WAIT_H_ */

4
test/test65.c
View file

@ -47,7 +47,7 @@ basic_test(void)
snprintf(cmd_buf, sizeof(cmd_buf), "mount -t ntfs-3g %s %s %s",
RAMDISK, TESTMNT, SILENT);
status = system(cmd_buf);
if (WEXITSTATUS(status != 0))
if (WEXITSTATUS(status) != 0)
bomb("Unable to mount NTFS partition (1)");
/* Open file and verify contents */
@ -98,7 +98,7 @@ create_partition(void)
snprintf(mntcmd, sizeof(mntcmd), "mount -t ntfs-3g %s %s %s",
RAMDISK, TESTMNT, SILENT);
status = system(mntcmd);
if (WEXITSTATUS(status != 0))
if (WEXITSTATUS(status) != 0)
bomb("Unable to mount NTFS partition (1)");
}