man/man2/setpgrp.2

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 setpgrp 2 "5 Jan 2000" "SunOS 5.11" "System Calls"
 NAME
setpgrp - set process group ID
 SYNOPSIS

#include <sys/types.h>
#include <unistd.h>

pid_t setpgrp(void);


 DESCRIPTION

If the calling process is not already a session leader, the setpgrp()
function makes it one by setting its process group ID and session
ID to the value of its process ID, and releases its controlling
terminal. See Intro(2) for more information on process group IDs
and session leaders.
 RETURN VALUES

The setpgrp() function returns the value of the new process group
ID.
 ERRORS

No errors are defined.
 ATTRIBUTES

See attributes(5) for descriptions of the following attributes:


ATTRIBUTE TYPEATTRIBUTE VALUE
Interface StabilityStandard


 SEE ALSO

setpgrp(1), Intro(2), exec(2), fork(2),
getpid(2), getsid(2), kill(2), signal(3C),
attributes(5), standards(5)