NAME¶
explain_setpgid_or_die - set process group and report errors
SYNOPSIS¶
#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 0.52
Copyright (C) 2011 Peter Miller