| .\" Copyright 1993 Rickard E. Faith (faith@cs.unc.edu) |
| .\" |
| .\" %%%LICENSE_START(VERBATIM) |
| .\" Permission is granted to make and distribute verbatim copies of this |
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| .\" Permission is granted to copy and distribute modified versions of this |
| .\" manual under the conditions for verbatim copying, provided that the |
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| .\" Since the Linux kernel and libraries are constantly changing, this |
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| .\" Modified, 27 May 2004, Michael Kerrisk <mtk.manpages@gmail.com> |
| .\" Added notes on capability requirements |
| .\" |
| .TH VHANGUP 2 2021-03-22 "Linux" "Linux Programmer's Manual" |
| .SH NAME |
| vhangup \- virtually hangup the current terminal |
| .SH SYNOPSIS |
| .nf |
| .B #include <unistd.h> |
| .PP |
| .B int vhangup(void); |
| .fi |
| .PP |
| .RS -4 |
| Feature Test Macro Requirements for glibc (see |
| .BR feature_test_macros (7)): |
| .RE |
| .PP |
| .BR vhangup (): |
| .nf |
| Since glibc 2.21: |
| .\" commit 266865c0e7b79d4196e2cc393693463f03c90bd8 |
| _DEFAULT_SOURCE |
| In glibc 2.19 and 2.20: |
| _DEFAULT_SOURCE || (_XOPEN_SOURCE && _XOPEN_SOURCE < 500) |
| Up to and including glibc 2.19: |
| _BSD_SOURCE || (_XOPEN_SOURCE && _XOPEN_SOURCE < 500) |
| .fi |
| .SH DESCRIPTION |
| .BR vhangup () |
| simulates a hangup on the current terminal. |
| This call arranges for other |
| users to have a \*(lqclean\*(rq terminal at login time. |
| .SH RETURN VALUE |
| On success, zero is returned. |
| On error, \-1 is returned, and |
| .I errno |
| is set to indicate the error. |
| .SH ERRORS |
| .TP |
| .B EPERM |
| The calling process has insufficient privilege to call |
| .BR vhangup (); |
| the |
| .B CAP_SYS_TTY_CONFIG |
| capability is required. |
| .SH CONFORMING TO |
| This call is Linux-specific, and should not be used in programs |
| intended to be portable. |
| .SH SEE ALSO |
| .BR init (1), |
| .BR capabilities (7) |
