setpgid.2 (2010 09)

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setpgid(2) setpgid(2)
NAME
setpgid(), setpgrp2() - set process group ID for job control
SYNOPSIS
#include <unistd.h>
int setpgid(pid_t pid, pid_t pgid);
int setpgrp2(pid_t pid, pid_t pgid);
DESCRIPTION
The setpgid() and setpgrp2() system calls cause the process specified by pid to join an existing
process group or create a new process group within the session of the calling process. The process group
ID of the process whose process ID is pid is set to pgid.Ifpid is zero, the process ID of the calling process
is used. If pgid is zero, the process ID of the indicated process is used. The process group ID of a session
leader does not change.
setpgrp2() is provided for backward compatibility only.
Security Restrictions
Some or all of the actions associated with this system call are subject to compartmental restrictions.
See compartments (5) for more information about compartmentalization on systems that support that
feature. Compartmental restrictions can be overridden if the process possesses the
PRIV_COMMALLOWED
privilege (COMMALLOWED). Processes owned by the superuser may not have
this privilege. Processes owned by any user may have this privilege, depending on system configuration.
See privileges (5) for more information about privileged access on systems that support fine-grained
privileges.
RETURN VALUE
setpgid() and setpgrp2() return the following values:
0 Successful completion.
-1 Failure. errno is set to indicate the error.
ERRORS
If
setpgid() or setpgrp2() fails, errno is set to one of the following values.
[EACCES] The value of pid matches the process ID of a child process of the calling process and
the child process has successfully executed one of the exec (2) functions.
[EINVAL] The value of pgid is less than zero or is outside the range of valid process group ID
values.
[EPERM] The process indicated by pid is a session leader.
[EPERM] The value of pid is valid but matches the process ID of a child process of the calling
process, and the child process is not in the same session as the calling process.
[EPERM] The value of pgid does not match the process ID of the process indicated by pid and
there is no process with a process group ID that matches the value of pgid in the
same session as the calling process.
[ESRCH] The value of pid does not match the process ID of the calling process or of a child
process of the calling process.
AUTHOR
setpgid() and setpgrp2() were developed by HP and the University of California, Berkeley.
SEE ALSO
bsdproc(3C), exec(2), exit(2), fork(2), getpid(2), kill(2), setsid(2), signal(2), privileges(5), termio(7).
STANDARDS CONFORMANCE
setpgid(): AES, SVID3, XPG3, XPG4, FIPS 151-2, POSIX.1
HP-UX 11i Version 3: September 2010 − 1 − Hewlett-Packard Company 1