tcgetpgrp - Online Linux Manual PageSection : 3
Updated : 2022-12-15
Source : Linux man-pages 6.03

---

NAMEtcgetpgrp, tcsetpgrp − get and set terminal foreground process group

---

LIBRARYStandard C library (libc, −lc)

---

SYNOPSIS#include <unistd.h>"pid_t tcgetpgrp(int fd); int tcsetpgrp(int fd, pid_t pgrp);

---

DESCRIPTIONThe function tcgetpgrp() returns the process group ID of the foreground process group on the terminal associated to fd, which must be the controlling terminal of the calling process. The function tcsetpgrp() makes the process group with process group ID pgrp the foreground process group on the terminal associated to fd, which must be the controlling terminal of the calling process, and still be associated with its session. Moreover, pgrp must be a (nonempty) process group belonging to the same session as the calling process. If tcsetpgrp() is called by a member of a background process group in its session, and the calling process is not blocking or ignoring SIGTTOU, a SIGTTOU signal is sent to all members of this background process group.

---

RETURN VALUEWhen fd refers to the controlling terminal of the calling process, the function tcgetpgrp() will return the foreground process group ID of that terminal if there is one, and some value larger than 1 that is not presently a process group ID otherwise. When fd does not refer to the controlling terminal of the calling process, −1 is returned, and errno is set to indicate the error. When successful, tcsetpgrp() returns 0. Otherwise, it returns −1, and errno is set to indicate the error.

---

ERRORSEBADF  fd is not a valid file descriptor. EINVAL  pgrp has an unsupported value. ENOTTY  The calling process does not have a controlling terminal, or it has one but it is not described by fd, or, for tcsetpgrp(), this controlling terminal is no longer associated with the session of the calling process. EPERM  pgrp has a supported value, but is not the process group ID of a process in the same session as the calling process.

---

ATTRIBUTESFor an explanation of the terms used in this section, see attributes(7). InterfaceAttributeValue tcgetpgrp(), tcsetpgrp() Thread safetyMT-Safe

---

STANDARDSPOSIX.1-2001, POSIX.1-2008.

---

NOTESThese functions are implemented via the TIOCGPGRP and TIOCSPGRP ioctls.

---

HistoryThe ioctls appeared in 4.2BSD. The functions are POSIX inventions.

---

SEE ALSOsetpgid(2), setsid(2), credentials(7) 0

---

Johanes Gumabo

---

Data Size   :   9,555 byte
man-tcsetpgrp.3Build   :   2024-12-05, 20:55   :  
Visitor Screen   :   x
Visitor Counter ( page / site )   :   2 / 237,218
Visitor ID   :     :  
Visitor IP   :   3.145.40.234   :  
Visitor Provider   :   AMAZON-02   :  
Provider Position ( lat x lon )   :   39.962500 x -83.006100   :   x
Provider Accuracy Radius ( km )   :   1000   :  
Provider City   :   Columbus   :  
Provider Province   :   Ohio ,   :   ,
Provider Country   :   United States   :  
Provider Continent   :   North America   :  
Visitor Recorder   :   Version   :  
Visitor Recorder   :   Library   :  
Online Linux Manual Page   :   Version   :   Online Linux Manual Page - Fedora.40 - march=x86-64 - mtune=generic - 24.12.05
Online Linux Manual Page   :   Library   :   lib_c - 24.10.03 - march=x86-64 - mtune=generic - Fedora.40
Online Linux Manual Page   :   Library   :   lib_m - 24.10.03 - march=x86-64 - mtune=generic - Fedora.40
Data Base   :   Version   :   Online Linux Manual Page Database - 24.04.13 - march=x86-64 - mtune=generic - fedora-38
Data Base   :   Library   :   lib_c - 23.02.07 - march=x86-64 - mtune=generic - fedora.36

---

Very long time ago, I have the best tutor, Wenzel Svojanovsky . If someone knows the email address of Wenzel Svojanovsky , please send an email to johanes_gumabo@yahoo.co.id .

---

If error, please print screen and send to johanes_gumabo@yahoo.co.id
Under development. Support me via PayPal.

---