#include <wait.h>
Link against: libc.lib

`_W_INT`

_W_INT (w) (*(int *)&(w))

Description

Macros to test the exit status returned by wait and extract the relevant values. Convert union wait to int.

Parameters

w

`WCOREFLAG`

Interface status:

externallyDefinedApi

WCOREFLAG 0200

Description

Macros to test the exit status returned by wait and extract the relevant values.

`_WSTATUS`

_WSTATUS (x) (_W_INT(x) & 0177)

Description

Macros to test the exit status returned by wait and extract the relevant values.

Parameters

x

`_WSTOPPED`

_WSTOPPED 0177

Description

Macros to test the exit status returned by wait and extract the relevant values.

`WIFSTOPPED`

Interface status:

externallyDefinedApi

WIFSTOPPED (x) (_WSTATUS(x) == _WSTOPPED)

Description

Macros to test the exit status returned by wait and extract the relevant values.

Parameters

x

`WSTOPSIG`

Interface status:

externallyDefinedApi

WSTOPSIG (x) (_W_INT(x) >> 8)

Description

Macros to test the exit status returned by wait and extract the relevant values.

Parameters

x

`WIFSIGNALED`

Interface status:

externallyDefinedApi

WIFSIGNALED (x) (_WSTATUS(x) != _WSTOPPED && _WSTATUS(x) != 0)

Description

Macros to test the exit status returned by wait and extract the relevant values.

Parameters

x

`WTERMSIG`

Interface status:

externallyDefinedApi

WTERMSIG (x) (_WSTATUS(x))

Description

Macros to test the exit status returned by wait and extract the relevant values.

Parameters

x

`WIFEXITED`

Interface status:

externallyDefinedApi

WIFEXITED (x) (_WSTATUS(x) == 0)

Description

Macros to test the exit status returned by wait and extract the relevant values.

Parameters

x

`WEXITSTATUS`

Interface status:

externallyDefinedApi

WEXITSTATUS (x) (_W_INT(x) >> 8)

Description

Macros to test the exit status returned by wait and extract the relevant values.

Parameters

x

`WIFCONTINUED`

Interface status:

externallyDefinedApi

WIFCONTINUED (x) (x == 0x13)

Description

Macros to test the exit status returned by wait and extract the relevant values.

Parameters

x

`WCOREDUMP`

Interface status:

externallyDefinedApi

WCOREDUMP (x) (_W_INT(x) & WCOREFLAG)

Description

Macros to test the exit status returned by wait and extract the relevant values.

Parameters

x

`W_EXITCODE`

Interface status:

externallyDefinedApi

W_EXITCODE (ret, sig) ((ret) << 8 | (sig))

Description

Macros to test the exit status returned by wait and extract the relevant values.

Parameters

`ret`
`sig`

`W_STOPCODE`

Interface status:

externallyDefinedApi

W_STOPCODE (sig) ((sig) << 8 | _WSTOPPED)

Description

Macros to test the exit status returned by wait and extract the relevant values.

Parameters

sig

`WIFTERMINATED`

Interface status:

externallyDefinedApi

WIFTERMINATED (x) (_WSTATUS(x)==1)

Description

Macros to test the termination code returned by wait and extract the relevant values.

Parameters

x

`WTERMINATESTATUS`

Interface status:

externallyDefinedApi

WTERMINATESTATUS (x) (_W_INT(x) >> 8)

Description

Macros to test the termination code returned by wait and extract the relevant values.

Parameters

x

`WIFPANICED`

Interface status:

externallyDefinedApi

WIFPANICED (x) (_WSTATUS(x)==2)

Description

Macros to test the panic code returned by wait and extract the relevant values.

Parameters

x

`WPANICCODE`

Interface status:

externallyDefinedApi

WPANICCODE (x) (_W_INT(x) >> 8)

Description

Macros to test the panic code returned by wait and extract the relevant values.

Parameters

x

`WNOHANG`

Interface status:

externallyDefinedApi

WNOHANG 1

Description

Don't hang in wait.

`WUNTRACED`

Interface status:

externallyDefinedApi

WUNTRACED 2

Description

Tell about stopped, untraced children.

`WCONTINUED`

Interface status:

externallyDefinedApi

WCONTINUED 4

Description

Report a job control continued process.

`WLINUXCLONE`

WLINUXCLONE 0x80000000

Description

Wait for kthread spawned from linux_clone.

`WAIT_ANY`

WAIT_ANY (-1)

Description

Any process. Tokens for special values of the pid parameter to wait4.

`WAIT_MYPGRP`

WAIT_MYPGRP 0

Description

Tokens for special values of the pid parameter to wait4. Any process in my process group.

`wait(int *)`

Interface status:

externallyDefinedApi

IMPORT_C pid_t wait(int *);

Description

The wait function suspends execution of its calling process until status information is available for a terminated child process, or a signal is received. On return from a successful wait call, the status area contains termination information about the process that exited as defined below.

The wpid argument specifies the set of child processes for which to wait. If wpid is -1, the call waits for any child process. If wpid is 0, the call waits for any child process in the process group of the caller. If wpid is greater than zero, the call waits for the process with process id wpid . If wpid is less than -1, the call waits for any process whose process group id equals the absolute value of wpid .

The waitpid function is identical to wait4 with an rusage value of zero.

Note:

The waitpid function waits for a process ID which is obtained using a non-standard API popen3

Parameters

int *

Note: This description also covers the following functions - waitpid

Return value

pid_tpid_t

If wait returns due to a stopped or terminated child process, the process ID of the child is returned to the calling process. Otherwise, a value of -1 is returned and errno is set to indicate the error. If wait4 , wait3 , or waitpid returns due to a stopped or terminated child process, the process ID of the child is returned to the calling process. If there are no children not previously awaited, -1 is returned with errno set to ECHILD . Otherwise, if WNOHANG is specified and there are no stopped or exited children, 0 is returned. If an error is detected or a caught signal aborts the call, a value of -1 is returned and errno is set to indicate the error.

`waitpid(pid_t,int *,int)`

Interface status:

externallyDefinedApi

IMPORT_C pid_t waitpid(pid_t, int *, int);

Description

Parameters

`pid_tpid_t`
`int *`
`int`	Refer to `wait(int )wait(int )` for the documentation

Return value

pid_tpid_t

_W_INT

Description

Parameters

WCOREFLAG

Description

_WSTATUS

Description

Parameters

_WSTOPPED

Description

WIFSTOPPED

Description

Parameters

WSTOPSIG

Description

Parameters

WIFSIGNALED

Description

Parameters

WTERMSIG

Description

Parameters

WIFEXITED

Description

Parameters

WEXITSTATUS

Description

Parameters

WIFCONTINUED

Description

Parameters

WCOREDUMP

Description

Parameters

W_EXITCODE

Description

Parameters

W_STOPCODE

Description

Parameters

WIFTERMINATED

Description

Parameters

WTERMINATESTATUS

Description

Parameters

WIFPANICED

Description

Parameters

WPANICCODE

Description

Parameters

WNOHANG

Description

WUNTRACED

Description

WCONTINUED

Description

WLINUXCLONE

Description

WAIT_ANY

Description

WAIT_MYPGRP

Description

wait(int *)

Description

Parameters

Return value

See also:

waitpid(pid_t,int *,int)

Description

Parameters

Return value

See also:

`_W_INT`

`WCOREFLAG`

`_WSTATUS`

`_WSTOPPED`

`WIFSTOPPED`

`WSTOPSIG`

`WIFSIGNALED`

`WTERMSIG`

`WIFEXITED`

`WEXITSTATUS`

`WIFCONTINUED`

`WCOREDUMP`

`W_EXITCODE`

`W_STOPCODE`

`WIFTERMINATED`

`WTERMINATESTATUS`

`WIFPANICED`

`WPANICCODE`

`WNOHANG`

`WUNTRACED`

`WCONTINUED`

`WLINUXCLONE`

`WAIT_ANY`

`WAIT_MYPGRP`

`wait(int *)`

`waitpid(pid_t,int *,int)`