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);

NAME

SYNOPSIS

DESCRIPTION

RETURN VALUE

EXAMPLE

SEE ALSO

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