libexplain/buffer/errno/wait4.c File Reference

#include <libexplain/ac/errno.h>
#include <libexplain/ac/sys/resource.h>
#include <libexplain/ac/unistd.h>
#include <libexplain/buffer/efault.h>
#include <libexplain/buffer/errno/wait4.h>
#include <libexplain/buffer/errno/waitpid.h>
#include <libexplain/buffer/pid_t_star.h>
#include <libexplain/buffer/pointer.h>
#include <libexplain/buffer/waitpid_options.h>
#include <libexplain/explanation.h>
#include <libexplain/is_efault.h>

Go to the source code of this file.

Functions
static void	explain_buffer_errno_wait4_system_call (explain_string_buffer_t *sb, int errnum, int pid, int *status, int options, struct rusage *rusage)
void	explain_buffer_errno_wait4_explanation (explain_string_buffer_t *sb, int errnum, const char *syscall_name, int pid, int *status, int options, struct rusage *rusage)
void	explain_buffer_errno_wait4 (explain_string_buffer_t *sb, int errnum, int pid, int *status, int options, struct rusage *rusage)

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Function Documentation

void explain_buffer_errno_wait4	(	explain_string_buffer_t *	sb,
		int	errnum,
		int	pid,
		int *	status,
		int	options,
		struct rusage *	rusage
	)

The explain_buffer_errno_wait4 function is used to obtain an explanation of an error returned by the wait4(2) system call. The least the message will contain is the value of strerror(errnum), but usually it will do much better, and indicate the underlying cause in more detail.

Parameters:

sb	The string buffer to print the message into. If a safe buffer is specified, this function is thread safe.
errnum	The error value to be decoded, usually obtained from the errno global variable just before this function is called. This is necessary if you need to call any code between the system call to be explained and this function, because many libc functions will alter the value of errno.
pid	The original pid, exactly as passed to the wait4(2) system call.
status	The original status, exactly as passed to the wait4(2) system call.
options	The original options, exactly as passed to the wait4(2) system call.
rusage	The original rusage, exactly as passed to the wait4(2) system call.

Definition at line 96 of file wait4.c.

void explain_buffer_errno_wait4_explanation	(	explain_string_buffer_t *	sb,
		int	errnum,
		const char *	syscall_name,
		int	pid,
		int *	status,
		int	options,
		struct rusage *	rusage
	)

The explain_buffer_errno_wait4_explanation function is used by the explain_buffer_errno_wait4 functions, and others, to obtain an explanation of an error returned by a wait4(2) system call.

Parameters:

sb	The string buffer to print the message into.
errnum	The error value to be decoded.
syscall_name	The name of the offending system call.
pid	The original pid, exactly as passed to the wait4(2) system call.
status	The original status, exactly as passed to the wait4(2) system call.
options	The original options, exactly as passed to the wait4(2) system call.
rusage	The original rusage, exactly as passed to the wait4(2) system call.

Definition at line 61 of file wait4.c.

static void explain_buffer_errno_wait4_system_call	(	explain_string_buffer_t *	sb,
		int	errnum,
		int	pid,
		int *	status,
		int	options,
		struct rusage *	rusage
	)		[static]

Definition at line 34 of file wait4.c.