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proc_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

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setpgid(2)							   System Calls 							setpgid(2)

NAME
setpgid - set process group ID SYNOPSIS
#include <sys/types.h> #include <unistd.h> int setpgid(pid_t pid, pid_t pgid); DESCRIPTION
The setpgid() function sets the process group ID of the process with ID pid to pgid. If pgid is equal to pid, the process becomes a process group leader. See Intro(2) for more information on session leaders and process group leaders. If pgid is not equal to pid, the process becomes a member of an existing process group. If pid is equal to 0, the process ID of the calling process is used. If pgid is equal to 0, the process specified by pid becomes a process group leader. RETURN VALUES
Upon successful completion, 0 is returned. Otherwise, -1 is returned and errno is set to indicate the error. ERRORS
The setpgid() function will fail if: EACCES 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 family of functions (see exec(2)). EINVAL The pgid argument is less than (pid_t) 0 or greater than or equal to PID_MAX, or the calling process has a controlling terminal that does not support job control. EPERM The process indicated by the pid argument is a session leader. EPERM The pid argument matches the process ID of a child process of the calling process and the child process is not in the same ses- sion as the calling process. EPERM The pgid argument does not match the process ID of the process indicated by the pid argument, and there is no process with a process group ID that matches pgid in the same session as the calling process. ESRCH The pid argument does not match the process ID of the calling process or of a child process of the calling process. 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), exit(2), fork(2), getpid(2), getsid(2), attributes(5), standards(5) SunOS 5.11 28 Dec 1996 setpgid(2)
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