getpgrp man page on Solaris

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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)
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