libexplain/buffer/errno/setpgrp.c File Reference

#include <libexplain/buffer/errno/setpgid.h>
#include <libexplain/buffer/errno/setpgrp.h>
#include <libexplain/buffer/pid_t_star.h>
#include <libexplain/explanation.h>

Go to the source code of this file.

Functions
static void	explain_buffer_errno_setpgrp_system_call (explain_string_buffer_t *sb, int errnum, pid_t pid, pid_t pgid)
void	explain_buffer_errno_setpgrp_explanation (explain_string_buffer_t *sb, int errnum, const char *syscall_name, pid_t pid, pid_t pgid)
void	explain_buffer_errno_setpgrp (explain_string_buffer_t *sb, int errnum, pid_t pid, pid_t pgid)

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Function Documentation

void explain_buffer_errno_setpgrp	(	explain_string_buffer_t *	sb,
		int	errnum,
		pid_t	pid,
		pid_t	pgid
	)

The explain_buffer_errno_setpgrp function is used to obtain an explanation of an error returned by the setpgrp(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 suitable 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 setpgrp(2) system call.
pgid	The original pgid, exactly as passed to the setpgrp(2) system call.

Definition at line 65 of file setpgrp.c.

void explain_buffer_errno_setpgrp_explanation	(	explain_string_buffer_t *	sb,
		int	errnum,
		const char *	syscall_name,
		pid_t	pid,
		pid_t	pgid
	)

The explain_buffer_errno_setpgrp_explanation function is used to obtain the explanation (the part after "because") of an error returned by the setpgrp(2) system call (and similar).

Parameters:

sb	The string buffer to print the message into. If a suitable 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.
syscall_name	The name of the offending system call.
pid	The original pid, exactly as passed to the setpgrp(2) system call.
pgid	The original pgid, exactly as passed to the setpgrp(2) system call.

Definition at line 47 of file setpgrp.c.

static void explain_buffer_errno_setpgrp_system_call	(	explain_string_buffer_t *	sb,
		int	errnum,
		pid_t	pid,
		pid_t	pgid
	)		[static]

Definition at line 26 of file setpgrp.c.