NAME¶
explain_realpath_or_die - return canonical pathname and report errors
SYNOPSIS¶
#include <libexplain/realpath.h>
char *explain_realpath_or_die(const char *pathname, char *resolved_pathname);
char *explain_realpath_on_error(const char *pathname, char *resolved_pathname);
DESCRIPTION¶
The
explain_realpath_or_die function is used to call the
realpath(3) system call. On failure an explanation will be printed to
stderr, obtained from the
explain_realpath(3) function, and then
the process terminates by calling exit(EXIT_FAILURE).
The
explain_realpath_on_error function is used to call the
realpath(3) system call. On failure an explanation will be printed to
stderr, obtained from the
explain_realpath(3) function, but
still returns to the caller.
- pathname
- The pathname, exactly as to be passed to the
realpath(3) system call.
- resolved_pathname
- The resolved_pathname, exactly as to be passed to the
realpath(3) system call.
RETURN VALUE¶
The
explain_realpath_or_die function only returns on success, see
realpath(3) for more information. On failure, prints an explanation and
exits, it does not return.
The
explain_realpath_on_error function always returns the value return by
the wrapped
realpath(3) system call.
EXAMPLE¶
The
explain_realpath_or_die function is intended to be used in a fashion
similar to the following example:
char *result = explain_realpath_or_die(pathname, resolved_pathname);
SEE ALSO¶
- realpath(3)
- return the canonicalized absolute pathname
- explain_realpath(3)
- explain realpath(3) errors
- exit(2)
- terminate the calling process
COPYRIGHT¶
libexplain version 0.52
Copyright (C) 2011 Peter Miller