setpgrp(2) [bsd man page]

SETPGRP(2)							System Calls Manual							SETPGRP(2)

NAME

       setpgrp - set process group

SYNOPSIS

       setpgrp(pid, pgrp)
       int pid, pgrp;

DESCRIPTION

       Setpgrp	sets  the  process group of the specified process pid to the specified pgrp.  If pid is zero, then the call applies to the current
       process.

       If the invoker is not the super-user, then the affected process must have the same effective user-id as the invoker or be a  descendant	of
       the invoking process.

RETURN VALUE

       Setpgrp	returns when the operation was successful.  If the request failed, -1 is returned and the global variable errno indicates the rea-
       son.

ERRORS

       Setpgrp will fail and the process group will not be altered if one of the following occur:

       [ESRCH]	      The requested process does not exist.

       [EPERM]	      The effective user ID of the requested process is different from that of the caller and the process is not a  descendent	of
		      the calling process.

SEE ALSO

       getpgrp(2)

4th Berkeley Distribution					    May 9, 1985 							SETPGRP(2)

SETPGID(2)						      BSD System Calls Manual							SETPGID(2)

NAME

     setpgid, setpgrp -- set process group

SYNOPSIS

     #include <unistd.h>

     int
     setpgid(pid_t pid, pid_t pgrp);

     int
     setpgrp(pid_t pid, pid_t pgrp);

DESCRIPTION

     Setpgid() sets the process group of the specified process pid to the specified pgrp.  If pid is zero, then the call applies to the current
     process.

     If the invoker is not the super-user, then the affected process must have the same effective user-id as the invoker or be a descendant of the
     invoking process.

RETURN VALUES

     Setpgid() returns 0 when the operation was successful.  If the request failed, -1 is returned and the global variable errno indicates the
     reason.

ERRORS

     Setpgid() will fail and the process group will not be altered if:

     [EACCES]		The value of the pid argument matches the process ID of a child process of the calling process, and the child process has
			successfully executed one of the exec functions.

     [EPERM]		The effective user ID of the requested process is different from that of the caller and the process is not a descendant of
			the calling process.

     [ESRCH]		The value of the pid argument does not match the process ID of the calling process or of a child process of the calling
			process.

SEE ALSO

     getpgrp(2)

STANDARDS

     The setpgid() function conforms to IEEE Std 1003.1-1988 (``POSIX.1'').

COMPATIBILITY

     Setpgrp() is identical to setpgid(), and is retained for calling convention compatibility with historical versions of BSD.

4th Berkeley Distribution					   June 4, 1993 					 4th Berkeley Distribution