explain_getpgid_or_die(3) - Linux man page
Name
explain_getpgid_or_die - get process group and report errors
Synopsis
#include <libexplain/getpgid.h>
pid_t explain_getpgid_or_die(pid_t pid);
pid_t explain_getpgid_on_error(pid_t pid);
Description
The explain_getpgid_or_die function is used to call the getpgid(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_getpgid(3) function, and then the process terminates by calling exit(EXIT_FAILURE).
The explain_getpgid_on_error function is used to call the getpgid(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_getpgid(3) function, but still returns to the caller.
- pid
The pid, exactly as to be passed to the getpgid(2) system call.
Return Value
The explain_getpgid_or_die function only returns on success, see getpgid(2) for more information. On failure, prints an explanation and exits, it does not return.
The explain_getpgid_on_error function always returns the value return by the wrapped getpgid(2) system call.
Example
The explain_getpgid_or_die function is intended to be used in a fashion similar to the following example:
-
pid_t result = explain_getpgid_or_die(pid);
See Also
getpgid(2)
- get process group
- explain_getpgid(3)
- explain getpgid(2) errors
- exit(2)
terminate the calling process
Copyright
libexplain version 0.52
Copyright © 2011 Peter Miller