getpgid(2) [osf1 man page]

getpgid(2)							System Calls Manual							getpgid(2)

NAME

       getpgid - Gets process group ID

LIBRARY

       Standard C Library (libc.a)

SYNOPSIS

       #include <sys/types.h>
       #include <unistd.h>
       pid_t getpgid(	   pid_t pid);

PARAMETERS

       Specifies the process ID of the target process; zero implies the calling process.

DESCRIPTION

       The  getpgid()  function returns the process group ID of the process specified by the process ID pid.  Specifying a pid of 0 (zero) returns
       the process group ID of the calling process.

RETURN VALUES

       The getpgid() function returns the process group ID of the process specified.  If there was an error, a value of -1 is returned	and  errno
       is set to indicate the error.

ERRORS

       If  any	of  the following conditions occurs, the getpgid() function sets errno to the corresponding value: The specified process is not in
       the same session as the calling process, and the calling process lacks sufficient privilege to read the specified  process.   As  released,
       Tru64 UNIX does not check the privilege.  No process has been found that has a process ID identical to that specified by the pid parameter.

RELATED INFORMATION

       Functions: exec(2), fork(2), setpgid(2) delim off

																	getpgid(2)

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 calling
       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 implementation
		       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)