pgrp_find(9) [netbsd man page]

PROC_FIND(9)						   BSD Kernel Developer's Manual					      PROC_FIND(9)

NAME

     proc_find, pgrp_find -- find process or process group

SYNOPSIS

     #include <sys/proc.h>

     struct proc *
     proc_find(pid_t pid);

     struct pgrp *
     pgrp_find(pid_t pgid);

     extern kmutex_t *proc_lock;

DESCRIPTION

     The proc_find() and pgrp_find() functions retrieve process and process group structures from process ID pid and process group ID pgid.  Both
     functions must be called by holding a mutex(9) on proc_lock.

RETURN VALUES

     Upon successful completion, the described functions return a pointer to either struct proc or struct pgrp.  Otherwise, if the requested ID
     was not found, NULL is returned.

SEE ALSO

     curproc(9)

BSD
								   July 1, 2010 							       BSD

SETPGID(2)						      BSD 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

     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 pgrp is zero, then the process id of the process specified by pid is used instead.

     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.

     [EINVAL]		The value of the pgrp argument is less than zero.

     [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 ISO/IEC 9945-1:1990 (``POSIX.1'').

COMPATIBILITY

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

BSD
								 December 18, 2003							       BSD