1TCSETPGRP(3P)              POSIX Programmer's Manual             TCSETPGRP(3P)
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PROLOG

6       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
7       implementation of this interface may differ (consult the  corresponding
8       Linux  manual page for details of Linux behavior), or the interface may
9       not be implemented on Linux.
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NAME

12       tcsetpgrp - set the foreground process group ID
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SYNOPSIS

15       #include <unistd.h>
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17       int tcsetpgrp(int fildes, pid_t pgid_id);
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DESCRIPTION

21       If the process has a controlling terminal, tcsetpgrp()  shall  set  the
22       foreground  process  group  ID associated with the terminal to pgid_id.
23       The application shall ensure that the file associated  with  fildes  is
24       the  controlling  terminal  of  the calling process and the controlling
25       terminal is currently  associated  with  the  session  of  the  calling
26       process. The application shall ensure that the value of pgid_id matches
27       a process group ID of a process in the  same  session  as  the  calling
28       process.
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30       Attempts to use tcsetpgrp() from a process which is a member of a back‐
31       ground process group on a fildes associated with its controlling termi‐
32       nal  shall  cause the process group to be sent a SIGTTOU signal. If the
33       calling process is blocking or ignoring SIGTTOU  signals,  the  process
34       shall be allowed to perform the operation, and no signal is sent.
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RETURN VALUE

37       Upon successful completion, 0 shall be returned. Otherwise, -1 shall be
38       returned and errno set to indicate the error.
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ERRORS

41       The tcsetpgrp() function shall fail if:
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43       EBADF  The fildes argument is not a valid file descriptor.
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45       EINVAL This implementation does not support the value  in  the  pgid_id
46              argument.
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48       ENOTTY The calling process does not have a controlling terminal, or the
49              file is not the controlling terminal, or the controlling  termi‐
50              nal  is  no  longer  associated  with the session of the calling
51              process.
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53       EPERM  The value of pgid_id is a value supported by the implementation,
54              but does not match the process group ID of a process in the same
55              session as the calling process.
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58       The following sections are informative.
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EXAMPLES

61       None.
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APPLICATION USAGE

64       None.
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RATIONALE

67       None.
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FUTURE DIRECTIONS

70       None.
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SEE ALSO

73       tcgetpgrp(),  the  Base  Definitions  volume  of  IEEE Std 1003.1-2001,
74       <sys/types.h>, <unistd.h>
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77       Portions  of  this text are reprinted and reproduced in electronic form
78       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
79       --  Portable  Operating  System  Interface (POSIX), The Open Group Base
80       Specifications Issue 6, Copyright (C) 2001-2003  by  the  Institute  of
81       Electrical  and  Electronics  Engineers, Inc and The Open Group. In the
82       event of any discrepancy between this version and the original IEEE and
83       The  Open Group Standard, the original IEEE and The Open Group Standard
84       is the referee document. The original Standard can be  obtained  online
85       at http://www.opengroup.org/unix/online.html .
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89IEEE/The Open Group                  2003                        TCSETPGRP(3P)
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