173 lines
4.0 KiB
Plaintext
173 lines
4.0 KiB
Plaintext
--- Makefile
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+++ Makefile 2008-12-04 18:59:57.812644400 +0100
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@@ -54,9 +54,10 @@ UBINPRG =
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ifeq ($(DISTRO),SuSE)
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UBINPRG += usleep
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UBINPRG += fsync
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+ VBINPRG += vhangup
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endif
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-all: $(SBINPRG) $(UBINPRG)
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+all: $(SBINPRG) $(UBINPRG) $(VBINPRG)
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libinit.o: libinit.c libinit.h
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$(CC) $(CFLAGS) $(CLOOP) -DINITDIR=\"$(INITDIR)\" -c $<
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@@ -104,6 +105,10 @@ install: $(TODO)
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$(INSTBIN) $$p $(UBINDIR)/; \
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$(INSTDOC) $$p.1 $(UDOCDIR)/; \
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done
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+ for p in $(VBINPRG); do \
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+ $(INSTBIN) $$p $(SBINDIR)/; \
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+ $(INSTDOC) $$p.8 $(SDOCDIR)/; \
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+ done
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#
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# Make distribution
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#
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@@ -120,8 +125,10 @@ FILES = README \
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libinit.h \
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usleep.c \
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usleep.1 \
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- fsync.c \
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- fsync.1 \
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+ fsync.c \
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+ fsync.1 \
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+ vhangup.c \
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+ vhangup.8 \
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killproc-$(VERSION).lsm
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dest:
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--- vhangup.8
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+++ vhangup.8 2008-12-05 11:29:05.893545808 +0100
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@@ -0,0 +1,51 @@
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+.\"
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+.\" Copyright 2008 Werner Fink, 2008 SUSE LINUX Products GmbH, Germany.
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+.\"
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+.\" This program is free software; you can redistribute it and/or modify
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+.\" it under the terms of the GNU General Public License as published by
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+.\" the Free Software Foundation; either version 2 of the License, or
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+.\" (at your option) any later version.
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+.\"
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+.TH VHANGUP 1 "Jan 31, 2008" "Version 1.16" "The SuSE boot concept"
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+.UC 1
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+.SH NAME
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+Vhangup \- Cause a virtually hangup on the specified terminals
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+.\"
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+.SH SYNOPSIS
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+.\"
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+.B vhangup [
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+.I /dev/<terminal>
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+.B [
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+.I /dev/<terminal>
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+.B ]
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+.B ]
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+.\"
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+.SH DESCRIPTION
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+.B vhangup
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+simulates a hangup on the specified terminals. Not existing
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+device files or devices will be ignored.
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+\."
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+.SH EXAMPLES
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+.nf
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+.B vhangup /dev/tty1 /dev/tty2 /dev/tty3 /dev/tty4 /dev/tty5 /dev/tty6 /dev/ttyS1
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+
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+.fi
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+This will replace all open file descriptors in the kernel that points
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+to the listed ttys by a dummy that will deny further reading/writing
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+to the device. It also send the signals SIGHUP/SIGCONT to the processes
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+which have file descriptors open on the listed ttys.
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+\."
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+.SH RETURN VALUE
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+On success, zero is returned. On error, 1 is returned.
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+\."
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+.SH SEE ALSO
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+.BR vhangup (2),
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+.BR tty (4),
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+.BR ttyS (4),
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+.BR pts (4).
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+\."
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+.SH COPYRIGHT
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+2008 Werner Fink,
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+2008 SUSE LINUX Products GmbH, Germany.
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+.SH AUTHOR
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+Werner Fink <werner@suse.de>
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--- vhangup.c
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+++ vhangup.c 2008-12-05 11:47:35.881479139 +0100
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@@ -0,0 +1,77 @@
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+/*
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+ * vhangup.c Cause a hangup on the specified terminals
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+ *
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+ * Usage: vhangup /dev/tty1 ...
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+ *
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+ * Copyright 2008 Werner Fink, 2008 SUSE LINUX Products GmbH, Germany.
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License as published by
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+ * the Free Software Foundation; either version 2 of the License, or
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+ * (at your option) any later version.
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+ *
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+ * Author: Werner Fink <werner@suse.de>
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+ */
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+
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+#ifndef _GNU_SOURCE
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+# define _GNU_SOURCE
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+#endif
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+#include <errno.h>
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+#include <fcntl.h>
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+#include <stdio.h>
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+#include <stdlib.h>
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+#include <string.h>
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+#include <sys/ioctl.h>
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+#include <sys/types.h>
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+#include <sys/stat.h>
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+#include <sys/wait.h>
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+#include <termios.h>
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+#include <unistd.h>
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+
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+int main(int argc, char* argv[])
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+{
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+ int ret;
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+
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+ switch (fork()) {
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+ case -1:
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+ fprintf(stderr, "vhangup: %s\n", strerror(errno));
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+ return 1;
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+ case 0: {
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+ struct sigaction sa, sa_old;
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+ int num;
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+
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+ setsid();
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+
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+ sa.sa_flags = 0;
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+ sa.sa_handler = SIG_IGN;
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+ sigemptyset (&sa.sa_mask);
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+ sigaction (SIGHUP, &sa, &sa_old);
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+
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+ for (ret = num = 1; num < argc; num++) {
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+ int fd = open(argv[num], O_RDWR|O_NONBLOCK|O_NOCTTY, 0);
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+ if (fd < 0) {
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+ switch (errno) {
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+ case ENOENT:
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+ case ENODEV:
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+ case ENXIO:
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+ ret++;
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+ default:
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+ break;
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+ }
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+ continue;
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+ }
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+ if ((ioctl (fd, TIOCSCTTY, 1) == 0) && (vhangup() == 0))
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+ ret++;
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+ close(fd);
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+ }
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+
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+ sigaction (SIGHUP, &sa_old, NULL);
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+ exit(ret != num);
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+ }
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+ default:
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+ waitpid(-1, &ret, 0);
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+ break;
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+ }
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+
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+ return (WIFEXITED(ret)) ? WEXITSTATUS(ret) : 1;
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+}
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