explain_shmat_or_die3
Shared memory attach and report errors
Usage
#include <libexplain/shmat.h>
void *explain_shmat_or_die(int shmid, const void *shmaddr, int shmflg);
void *explain_shmat_on_error(int shmid, const void *shmaddr, int shmflg);
Overview
The explain_shmat_or_die function is used to call the shmat(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_shmat(3) function, and then the process terminates by calling exit(EXIT_FAILURE).
The explain_shmat_on_error function is used to call the shmat(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_shmat(3) function, but still returns to the caller.
shmid
|
The shmid, exactly as to be passed to the shmat(2) system call. |
|---|---|
shmaddr
|
The shmaddr, exactly as to be passed to the shmat(2) system call. |
shmflg
|
The shmflg, exactly as to be passed to the shmat(2) system call. |
Return value
The explain_shmat_or_die function only returns on success, see shmat(2) for more information. On failure, prints an explanation and exits, it does not return.
The explain_shmat_on_error function always returns the value return by the wrapped shmat(2) system call.
Examples
The explain_shmat_or_die function is intended to be used in a fashion similar to the following example:
void *result = explain_shmat_or_die(shmid, shmaddr, shmflg);Releases
6 releases since Debian 7 (Wheezy); the text changed 1 time.