156 lines
4.3 KiB
C
156 lines
4.3 KiB
C
/* $NetBSD: ttyaction.c,v 1.4 1996/11/22 22:04:25 gwr Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1996 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Gordon W. Ross.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the NetBSD
|
|
* Foundation, Inc. and its contributors.
|
|
* 4. Neither the name of The NetBSD Foundation nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
/*
|
|
* For each matching "tty" and "action" run the "command."
|
|
* See fnmatch() for matching the tty name.
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/wait.h>
|
|
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <paths.h>
|
|
|
|
#include "util.h"
|
|
|
|
#ifndef _PATH_TTYACTION
|
|
#define _PATH_TTYACTION "/etc/ttyaction"
|
|
#endif
|
|
|
|
static char *actfile = _PATH_TTYACTION;
|
|
static char *pathenv = "PATH=" _PATH_STDPATH;
|
|
|
|
int
|
|
ttyaction(tty, act, user)
|
|
char *tty;
|
|
char *act;
|
|
char *user;
|
|
{
|
|
FILE *fp;
|
|
char *p1, *p2;
|
|
char *argv[4];
|
|
char *envp[8];
|
|
char line[1024];
|
|
char env_tty[64];
|
|
char env_act[64];
|
|
char env_user[256];
|
|
int err, linenum, pid, status;
|
|
|
|
fp = fopen(actfile, "r");
|
|
if (fp == NULL)
|
|
return 0;
|
|
|
|
/* Skip the "/dev/" part of the first arg. */
|
|
if (!strncmp(tty, "/dev/", 5))
|
|
tty += 5;
|
|
|
|
/* Args will be: "sh -c ..." */
|
|
argv[0] = _PATH_BSHELL;
|
|
argv[1] = "-c";
|
|
argv[2] = NULL; /* see below */
|
|
argv[3] = NULL;
|
|
|
|
/*
|
|
* Environment needs: TTY, ACT, USER
|
|
*/
|
|
snprintf(env_tty, sizeof(env_tty), "TTY=%s", tty);
|
|
snprintf(env_act, sizeof(env_act), "ACT=%s", act);
|
|
snprintf(env_user, sizeof(env_user), "USER=%s", user);
|
|
envp[0] = pathenv;
|
|
envp[1] = env_tty;
|
|
envp[2] = env_act;
|
|
envp[3] = env_user;
|
|
envp[4] = NULL;
|
|
|
|
linenum = 0;
|
|
status = 0;
|
|
while (fgets(line, sizeof(line), fp)) {
|
|
linenum++;
|
|
|
|
/* Allow comment lines. */
|
|
if (line[0] == '#')
|
|
continue;
|
|
|
|
p1 = strtok(line, " \t");
|
|
p2 = strtok(NULL, " \t");
|
|
/* This arg goes to end of line. */
|
|
argv[2] = strtok(NULL, "\n");
|
|
if (!p1 || !p2 || !argv[2]) {
|
|
warnx("%s: line %d format error", actfile, linenum);
|
|
continue;
|
|
}
|
|
if (fnmatch(p1, tty, 0) || fnmatch(p2, act, 0))
|
|
continue;
|
|
/* OK, this is a match. Run the command. */
|
|
pid = fork();
|
|
if (pid == -1) {
|
|
warnx("fork failed: %s", strerror(errno));
|
|
continue;
|
|
}
|
|
if (pid == 0) {
|
|
/* This is the child. */
|
|
err = execve(argv[0], argv, envp);
|
|
/* If we get here, it is an error. */
|
|
warnx("%s: line %d: exec failed: %s",
|
|
actfile, linenum, strerror(errno));
|
|
exit(1);
|
|
}
|
|
/* This is the parent. */
|
|
err = waitpid(pid, &status, 0);
|
|
if (err == -1) {
|
|
warnx("%s: line %d: wait failed: %s",
|
|
actfile, linenum, strerror(errno));
|
|
continue;
|
|
}
|
|
if (WTERMSIG(status)) {
|
|
warnx("%s: line %d: child died with signal %d",
|
|
actfile, linenum, WTERMSIG(status));
|
|
continue;
|
|
}
|
|
}
|
|
fclose(fp);
|
|
return status;
|
|
}
|
|
|