FreeBSD Manual Pages
getpid(2) System Calls getpid(2) NAME getpid, getpgrp, getppid, getpgid - get process, process group, and parent process IDs SYNOPSIS #include <unistd.h> pid_t getpid(void); pid_t getpgrp(void); pid_t getppid(void); pid_t getpgid(pid_t pid); DESCRIPTION The getpid() function returns the process ID of the calling process. The getpgrp() function returns the process group ID of the calling process. The getppid() function returns the parent process ID of the calling process. The getpgid() function returns the process group ID of the process whose process ID is equal to pid, or the process group ID of the call- ing process, if pid is equal to 0. RETURN VALUES Upon successful completion, these functions return the process group ID. Otherwise, getpgid() returns (pid_t)-1 and sets errno to indicate the error. ERRORS The getpgid() function will fail if: EPERM The process whose process ID is equal to pid is not in the same session as the calling process, and the imple- mentation does not allow access to the process group ID of that process from the calling process. ESRCH There is no process with a process ID equal to pid. The getpgid() function may fail if: EINVAL The value of the pid argument is invalid. ATTRIBUTES See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |Async-Signal-Safe | +-----------------------------+-----------------------------+ SEE ALSO intro(2), exec(2), fork(2), getsid(2), setpgid(2), setpgrp(2), setsid (2), signal(3C), attributes(5), standards(5) SunOS 5.10 28 Dec 1996 getpid(2)
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | ATTRIBUTES | SEE ALSO
Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=getpid&sektion=2&manpath=SunOS+5.10>