tcsetpgrp(3) - NetBSD Manual Pages

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


NAME

     tcsetpgrp - set foreground process group ID


LIBRARY

     Standard C Library (libc, -lc)


SYNOPSIS

     #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 cur-
     rently 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 termi-
                   nal, 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 tcsetpgprp function conforms to IEEE Std 1003.1-1990 (``POSIX'').

NetBSD 1.6.1                     June 4, 1993                                1