tcsetpgrp man page on OpenBSD

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TCSETPGRP(3)		  OpenBSD Programmer's Manual		  TCSETPGRP(3)

NAME
     tcsetpgrp - set foreground process group ID

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

     int
     tcsetpgrp(int fd, pid_t pgrp_id);

DESCRIPTION
     If the process has a controlling terminal, the tcsetpgrp() function sets
     the foreground process group ID associated with the terminal device to
     pgrp_id.  The terminal device associated with fd 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 pgrp_id must be the same as the process group ID of a process in the
     same session as the calling process.

     Upon successful completion, tcsetpgrp() returns a value of zero.

ERRORS
     If an error occurs, tcgetpgrp() returns -1 and the global variable errno
     is set to indicate the error, as follows:

     [EBADF]	   The fd argument is not a valid file descriptor.

     [EINVAL]	   An invalid value of pgrp_id was specified.

     [ENOTTY]	   The calling process does not have a controlling terminal,
		   or the file represented by fd is not the controlling
		   terminal, or the controlling terminal is no longer
		   associated with the session of the calling process.

     [EPERM]	   The pgrp_id argument does not match the process group ID of
		   a process in the same session as the calling process.

SEE ALSO
     setpgid(2), setsid(2), tcgetpgrp(3)

STANDARDS
     The tcsetpgrp() function is expected to be compliant with the IEEE Std
     1003.1-1988 (``POSIX'') specification.

OpenBSD 4.9			 May 31, 2007			   OpenBSD 4.9
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