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Diffstat (limited to 'usr/src/cmd/csh/wait.h')
| -rw-r--r-- | usr/src/cmd/csh/wait.h | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/usr/src/cmd/csh/wait.h b/usr/src/cmd/csh/wait.h new file mode 100644 index 0000000000..97b3579bc8 --- /dev/null +++ b/usr/src/cmd/csh/wait.h @@ -0,0 +1,110 @@ +/* + * Copyright 1994 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + * + * Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T + * All Rights Reserved + * + * Copyright (c) 1980 Regents of the University of California. + * All rights reserved. The Berkeley Software License Agreement + * specifies the terms and conditions for redistribution. + */ + +#pragma ident "%Z%%M% %I% %E% SMI" + +/* + * This file holds definitions relevent to the wait system call. + * Some of the options here are available only through the ``wait3'' + * entry point; the old entry point with one argument has more fixed + * semantics, never returning status of unstopped children, hanging until + * a process terminates if any are outstanding, and never returns + * detailed information about process resource utilization (<vtimes.h>). + */ + +#ifndef _sys_wait_h +#define _sys_wait_h + +#include <sys/isa_defs.h> /* included for _LITTLE_ENDIAN define */ + +/* + * Structure of the information in the first word returned by both + * wait and wait3. If w_stopval==WSTOPPED, then the second structure + * describes the information returned, else the first. See WUNTRACED below. + */ +union wait { + int w_status; /* used in syscall */ + /* + * Terminated process status. + */ + struct { +#if defined(_LITTLE_ENDIAN) + unsigned short w_Termsig:7; /* termination signal */ + unsigned short w_Coredump:1; /* core dump indicator */ + unsigned short w_Retcode:8; /* exit code if w_termsig==0 */ +#elif defined(_BIG_ENDIAN) + unsigned short w_Fill1:16; /* high 16 bits unused */ + unsigned short w_Retcode:8; /* exit code if w_termsig==0 */ + unsigned short w_Coredump:1; /* core dump indicator */ + unsigned short w_Termsig:7; /* termination signal */ +#else +#error NO ENDIAN defined. +#endif + } w_T; + /* + * Stopped process status. Returned + * only for traced children unless requested + * with the WUNTRACED option bit. + */ + struct { +#if defined(_LITTLE_ENDIAN) + unsigned short w_Stopval:8; /* == W_STOPPED if stopped */ + unsigned short w_Stopsig:8; /* signal that stopped us */ +#elif defined(_BIG_ENDIAN) + unsigned short w_Fill2:16; /* high 16 bits unused */ + unsigned short w_Stopsig:8; /* signal that stopped us */ + unsigned short w_Stopval:8; /* == W_STOPPED if stopped */ +#else +#error NO ENDIAN defined. +#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 0177 /* value of s.stopval if process is stopped */ +#define WCONTFLG 0177777 /* value of w.w_status due to SIGCONT, sysV */ + +/* + * Option bits for the second argument of wait3. 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 + * which stop due to signals. If children are stopped and a wait without + * this option is done, it is as though they were still running... nothing + * about them is returned. + */ +#define WNOHANG 1 /* dont hang in wait */ +#define WUNTRACED 2 /* tell about stopped, untraced children */ + +#define WIFSTOPPED(x) ((x).w_stopval == WSTOPPED) +#define WIFSIGNALED(x) ((x).w_stopval != WSTOPPED && (x).w_termsig != 0) +#define WIFEXITED(x) ((x).w_stopval != WSTOPPED && (x).w_termsig == 0) + +#ifdef KERNEL +/* + * Arguments to wait4() system call, included here so it may be called by + * other routines in the kernel + */ +struct wait4_args { + int pid; + union wait *status; + int options; + struct rusage *rusage; +}; +#endif KERNEL + +#endif /*!_sys_wait_h*/ |