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30 .\" @(#)tcsetpgrp.3 8.1 (Berkeley) 6/4/93
37 .Nd set foreground process group ID
43 .Fn tcsetpgrp "int fd" "pid_t pgrp_id"
45 If the process has a controlling terminal, the
47 function sets the foreground process group ID associated with the
50 The terminal device associated with
52 must be the controlling terminal of the calling process and the
53 controlling terminal must be currently associated with the session
54 of the calling process.
57 must be the same as the process group ID of a process in the same
58 session as the calling process.
60 Upon successful completion,
62 returns a value of zero.
66 returns -1 and the global variable
68 is set to indicate the error, as follows:
73 argument is not a valid file descriptor.
79 The calling process does not have a controlling terminal, or the file
82 is not the controlling terminal, or the controlling terminal is no
83 longer associated with the session of the calling process.
87 argument does not match the process group ID of a process in the same
88 session as the calling process.