explain_openat_or_die3
Open a file relative to a dir fd and report errors
Usage
#include <libexplain/openat.h>
int explain_openat_or_die(int fildes, const char *pathname, int flags, mode_t mode);
int explain_openat_on_error(int fildes, const char *pathname, int flags, mode_t mode);
Overview
The explain_openat_or_die function is used to call the openat(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_openat(3) function, and then the process terminates by calling exit(EXIT_FAILURE).
The explain_openat_on_error function is used to call the openat(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_openat(3) function, but still returns to the caller.
fildes
|
The fildes, exactly as to be passed to the openat(2) system call. |
|---|---|
pathname
|
The pathname, exactly as to be passed to the openat(2) system call. |
flags
|
The flags, exactly as to be passed to the openat(2) system call. |
mode
|
The mode, exactly as to be passed to the openat(2) system call. |
Return value
The explain_openat_or_die function only returns on success, see openat(2) for more information. On failure, prints an explanation and exits, it does not return.
The explain_openat_on_error function always returns the value return by the wrapped openat(2) system call.
Examples
The explain_openat_or_die function is intended to be used in a fashion similar to the following example:
int result = explain_openat_or_die(fildes, pathname, flags, mode);Releases
Unchanged in 5 releases since Debian 9 (Stretch).