table of contents
| explain_setpgid_or_die(3) | Library Functions Manual | explain_setpgid_or_die(3) |
NAME¶
explain_setpgid_or_die - set process group and report errorsSYNOPSIS¶
#include <libexplain/setpgid.h>void explain_setpgid_or_die(pid_t pid, pid_t pgid);
int explain_setpgid_on_error(pid_t pid, pid_t pgid);
DESCRIPTION¶
The explain_setpgid_or_die function is used to call the setpgid(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_setpgid(3) function, and then the process terminates by calling exit(EXIT_FAILURE).The explain_setpgid_on_error function is used to call the setpgid(2) system call. On failure an explanation will be printed to stderr, obtained from the explain_setpgid(3) function, but still returns to the caller.
- pid
- The pid, exactly as to be passed to the setpgid(2) system call.
- pgid
- The pgid, exactly as to be passed to the setpgid(2) system call.
RETURN VALUE¶
The explain_setpgid_or_die function only returns on success, see setpgid(2) for more information. On failure, prints an explanation and exits, it does not return.The explain_setpgid_on_error function always returns the value return by the wrapped setpgid(2) system call.
EXAMPLE¶
The explain_setpgid_or_die function is intended to be used in a fashion similar to the following example:explain_setpgid_or_die(pid, pgid);
SEE ALSO¶
- setpgid(2)
- set process group
- explain_setpgid(3)
- explain setpgid(2) errors
- exit(2)
- terminate the calling process
COPYRIGHT¶
libexplain version 1.4Copyright (C) 2011 Peter Miller