SIMPLE SOLUTIONS

EXPLAIN_OPENAT_OR_DIE - reference manual online

Open a file relative to a dir fd and report errors.

Chapter
explain_openat_or_die(3)             Library Functions Manual            explain_openat_or_die(3)

NAME explain_openat_or_die - open a file relative to a dir fd and report errors
SYNOPSIS #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);
DESCRIPTION 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 infor‐ mation. 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 ope‐ nat(2) system call.
EXAMPLE The explain_openat_or_die function is intended to be used in a fashion similar to the fol‐ lowing example: int result = explain_openat_or_die(fildes, pathname, flags, mode);
SEE ALSO openat(2) open a file relative to a directory file descriptor explain_openat(3) explain openat(2) errors exit(2) terminate the calling process
explain_openat_or_die(3)
This manual Reference Other manuals
explain_openat_or_die(3) referred by explain(3) | explain_openat(3)
refer to _exit(2) | explain_openat(3) | open(2)