|explain_setreuid_or_die(3)||Library Functions Manual||explain_setreuid_or_die(3)|
explain_setreuid_or_die - set the real and effective user ID and report errors
void explain_setreuid_or_die(uid_t ruid, uid_t euid);
int explain_setreuid_on_error(uid_t ruid, uid_t euid);
The explain_setreuid_or_die function is used to call the setreuid(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_setreuid(3) function, and then the process terminates by calling exit(EXIT_FAILURE).
The explain_setreuid_on_error function is used to call the setreuid(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_setreuid(3) function, but still returns to the caller.
The explain_setreuid_or_die function only returns on success, see setreuid(2) for more information. On failure, prints an explanation and exits, it does not return.
The explain_setreuid_on_error function always returns the value return by the wrapped setreuid(2) system call.
The explain_setreuid_or_die function is intended to be used in a fashion similar to the following example:
libexplain version 1.4
Copyright (C) 2012 Peter Miller