tcsetpgrp(3)tcsetpgrp(3)NAMEtcsetpgrp - Set foreground process group ID
SYNOPSIS
#include <unistd.h>
int tcsetpgrp(
int filedes,
pid_t pgrp_id );
Application developers may want to specify an #include statement for
<sys/types.h> before the one for <unistd.h> if programs are being
developed for multiple platforms. The additional #include statement is
not required on Tru64 UNIX systems or by ISO or X/Open standards, but
may be required on other vendors' systems that conform to these stan‐
dards.
LIBRARY
Standard C Library (libc)
PARAMETERS
Specifies an open file descriptor. Specifies the process group identi‐
fier.
DESCRIPTION
If the process has a controlling terminal, the tcsetpgrp() function
sets the foreground process group ID associated with the terminal to
the value of the pgrp_id parameter. The file associated with the
filedes parameter must be the controlling terminal of the calling
process, and the controlling terminal must be currently associated with
the session of the calling process. The value of the pgrp_id parameter
must match a process group ID of a process in the same session as the
calling process.
RETURN VALUES
Upon successful completion, a value of 0 (zero) is returned. Otherwise,
a value of -1 is returned and errno is set to indicate the error.
ERRORS
The tcsetpgrp() function sets errno to the specified values for the
following conditions:
The filedes parameter is not a valid file descriptor. The pgrp_id
parameter is invalid. The calling process does not have a controlling
terminal, the file is not the controlling terminal, or the controlling
terminal is no longer associated with the session of the calling
process. The value of the pgrp_id parameter does not match the process
group ID of a process in the same session as the calling process.
SEE ALSO
Functions: tcgetpgrp(3)
Standards: standards(5)tcsetpgrp(3)
