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SETPGID(2)		  FreeBSD System Calls Manual		    SETPGID(2)

NAME
     setpgid, setpgrp -- set process group

LIBRARY
     Standard C	Library	(libc, -lc)

SYNOPSIS
     #include <unistd.h>

     int
     setpgid(pid_t pid,	pid_t pgrp);

     int
     setpgrp(pid_t pid,	pid_t pgrp);

DESCRIPTION
     The setpgid() system call 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 pgrp is zero,	then the process id of the process
     specified by pid is used instead.

     If	the affected process is	not the	invoking process, then it must be a
     child of the invoking process, it must not	have performed an exec(3)
     operation,	and both processes must	be in the same session.	 The requested
     process group ID must already exist in the	session	of the caller, or it
     must be equal to the target process ID.

RETURN VALUES
     The setpgid() function returns the	value 0	if successful; otherwise the
     value -1 is returned and the global variable errno	is set to indicate the
     error.

COMPATIBILITY
     The setpgrp() system call is identical to setpgid(), and is retained for
     calling convention	compatibility with historical versions of BSD.

ERRORS
     The setpgid() system call will fail and the process group will not	be
     altered if:

     [EINVAL]		The requested process group ID is not legal.

     [ESRCH]		The requested process does not exist.

     [ESRCH]		The target process is not the calling process or a
			child of the calling process.

     [EACCES]		The requested process is a child of the	calling
			process, but it	has performed an exec(3) operation.

     [EPERM]		The target process is a	session	leader.

     [EPERM]		The requested process group ID is not in the session
			of the caller, and it is not equal to the process ID
			of the target process.

SEE ALSO
     getpgrp(2)

STANDARDS
     The setpgid() system call is expected to conform to ISO/IEC 9945-1:1990
     (``POSIX.1'').

FreeBSD	10.1		       February	8, 2004			  FreeBSD 10.1

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | COMPATIBILITY | ERRORS | SEE ALSO | STANDARDS

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