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TCSETPGRP(3)             BSD Library Functions Manual             TCSETPGRP(3)

     tcsetpgrp -- set foreground process group ID

     Standard C Library (libc, -lc)

     #include <unistd.h>

     tcsetpgrp(int fildes, pid_t pgid_id);

     If the process has a controlling terminal, the tcsetpgrp() function sets the foreground process group
     ID associated with the terminal device to pgid_id.  The terminal device associated with fildes must be
     the controlling terminal of the calling process and the controlling terminal must be currently associ-ated associated
     ated with the session of the calling process.  The value of pgid_id must be the same as the process
     group ID of a process in the same session as the calling process.

     The tcsetpgrp() function returns the value 0 if successful; otherwise the value -1 is returned and the
     global variable errno is set to indicate the error.

     The tcsetpgrp() function will fail if:

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

     [EINVAL]           An invalid value of pgid_id was specified.

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

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

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

     The include file <sys/types.h> is necessary.

     setpgid(2), setsid(2), tcgetpgrp(3), compat(5)

     The tcsetpgrp() function is expected to be compliant with the IEEE Std 1003.1-1988 (``POSIX.1'') speci-fication. specification.

BSD                              June 4, 1993                              BSD

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