SIMPLE SOLUTIONS

EXPLAIN_GETPGID_OR_DIE - reference manual online

Get process group and report errors.

Chapter
explain_getpgid_or_die(3)            Library Functions Manual           explain_getpgid_or_die(3)

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 fail‐ ure an explanation will be printed to stderr, obtained from the explain_getpgid(3) func‐ tion, 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
explain_getpgid_or_die(3)
This manual Reference Other manuals
explain_getpgid_or_die(3) referred by explain(3) | explain_getpgid(3)
refer to _exit(2) | explain_getpgid(3) | setpgid(2)