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This commit is contained in:
Roland McGrath 1994-01-27 01:18:03 +00:00
parent 84e961871c
commit b973b356ec
2 changed files with 52 additions and 38 deletions
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31
sysdeps/unix/sysv/sysv4/siginfo.h
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@ -1,5 +1,5 @@
/* Definitions of the siginfo structure.
Copyright (C) 1993 Free Software Foundation, Inc.
Copyright (C) 1993, 1994 Free Software Foundation, Inc.
Contributed by Brendan Kehoe (brendan@zen.org).
The GNU C Library is free software; you can redistribute it and/or
@ -24,9 +24,8 @@ Cambridge, MA 02139, USA. */
/* SVR4 puts a ton of other stuff in this structure. For now, we'll just
define the two things we really need out of it, and hope for the best. */
/* These define the different states a child can have on exit. Need these
to build the correct status return for things like waitpid */
/* These define the different states a child can have on exit.
We need these to build the status return for things like waitpid. */
#define EXITED 1
#define KILLED 2
#define CORED 3
@ -35,25 +34,25 @@ to build the correct status return for things like waitpid */
#define CONTINUED 6
typedef struct __siginfo
{
int filler1;
{
int filler1;
/* Code indicating child's status */
int __code;
/* Code indicating child's status */
int __code;
int filler2;
int filler2;
/* The PID of the child. */
long __pid;
/* The PID of the child. */
long __pid;
int filler3;
int filler3;
/* The child's status. */
int __status;
/* The child's status. */
int __status;
int filler4[26];
int filler4[26];
} __siginfo_t;
} __siginfo_t;
#endif /* __USE_SVID */
#endif /* siginfo.h */

59
sysdeps/unix/sysv/sysv4/waitpid.c
View File

@ -24,16 +24,16 @@ Cambridge, MA 02139, USA. */
#include "siginfo.h"
typedef enum __idtype
{
/* Look for processes based upon a given PID. */
P_PID,
{
/* Look for processes based upon a given PID. */
P_PID,
/* Look for processes based upon a given process-group ID. */
P_PGID = 2,
/* Look for processes based upon a given process-group ID. */
P_PGID = 2,
/* Look for any process. */
P_ALL = 7,
} __idtype_t;
/* Look for any process. */
P_ALL = 7,
} __idtype_t;
extern __pid_t __getpgid __P ((__pid_t pid));
extern int __waitid __P ((__idtype_t idtype, __pid_t id,
@ -53,32 +53,32 @@ extern int __waitid __P ((__idtype_t idtype, __pid_t id,
return status for stopped children; otherwise don't. */
__pid_t
DEFUN(__waitpid, (__pid, __stat_loc, __options),
__pid_t __pid AND int *__stat_loc AND int __options)
DEFUN(__waitpid, (pid, stat_loc, options),
__pid_t pid AND int *stat_loc AND int options)
{
__idtype_t idtype;
__pid_t tmp_pid = __pid;
__pid_t tmp_pid = pid;
__siginfo_t infop;
if (__pid <= WAIT_MYPGRP)
if (pid <= WAIT_MYPGRP)
{
if (__pid == WAIT_ANY)
if (pid == WAIT_ANY)
{
/* Request the status for any child. */
idtype = P_ALL;
}
else if (__pid == WAIT_MYPGRP)
else if (pid == WAIT_MYPGRP)
{
/* Request the status for any child process that has
a pgid that's equal to that of our parent. */
tmp_pid = __getpgid (0);
idtype = P_PGID;
}
else /* __pid < -1 */
else /* PID < -1 */
{
/* Request the status for any child whose pgid is equal
to the absolute value of PID. */
tmp_pid = __pid & ~0; /* XXX not pseudo-insn */
tmp_pid = pid & ~0; /* XXX not pseudo-insn */
idtype = P_PGID;
}
}
@ -88,13 +88,28 @@ DEFUN(__waitpid, (__pid, __stat_loc, __options),
idtype = P_PID;
}
if (__waitid (idtype, tmp_pid, &infop, __options | WEXITED | WTRAPPED) < 0)
{
*__stat_loc = infop.__status;
return -1;
}
if (__waitid (idtype, tmp_pid, &infop, options | WEXITED | WTRAPPED) < 0)
return -1;
*__stat_loc = infop.__status;
switch (infop.__code)
{
case EXITED:
*stat_loc = W_EXITCODE (infop.__status, 0);
break;
case STOPPED:
case TRAPPED:
*stat_loc = W_STOPCODE (infop.__status);
break;
case KILLED:
/* Don't know what to do with continue, since it isn't documented.
Putting it here seemed the right place though. */
case CONTINUED:
*stat_loc = infop.__status;
/* FALLTHROUGH */
case CORED:
*stat_loc |= WCOREFLAG;
break;
}
/* Return the PID out of the INFOP structure instead of the one we were
called with, to account for cases of being called with -1 to signify