71d8432f98
At first, I added a utility called utxrm(8) to remove stale entries from the user accounting database. It seems there are cases in which we need to perform different operations on the database as well. Simply rename utxrm(8) to utx(8) and place the old code under the "rm" command. In addition to "rm", this tool supports "boot" and "shutdown", which are going to be used by an rc-script which I am going to commit separately.
115 lines
3.1 KiB
C
115 lines
3.1 KiB
C
/*-
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* Copyright (c) 2011-2012 Ed Schouten <ed@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/time.h>
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#include <errno.h>
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#include <ctype.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 <utmpx.h>
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static int
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b16_pton(const char *in, char *out, size_t len)
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{
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size_t i;
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for (i = 0; i < len * 2; i++)
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if (!isxdigit((unsigned char)in[i]))
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return (1);
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for (i = 0; i < len; i++)
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sscanf(&in[i * 2], "%02hhx", &out[i]);
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return (0);
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}
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static int
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rm(char *id[])
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{
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struct utmpx utx = { .ut_type = DEAD_PROCESS };
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size_t len;
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int ret = 0;
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(void)gettimeofday(&utx.ut_tv, NULL);
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for (; *id != NULL; id++) {
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len = strlen(*id);
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if (len <= sizeof(utx.ut_id)) {
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/* Identifier as string. */
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strncpy(utx.ut_id, *id, sizeof(utx.ut_id));
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} else if (len != sizeof(utx.ut_id) * 2 ||
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b16_pton(*id, utx.ut_id, sizeof(utx.ut_id)) != 0) {
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/* Also not hexadecimal. */
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fprintf(stderr, "%s: Invalid identifier format\n", *id);
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ret = 1;
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continue;
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}
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/* Zap the entry. */
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if (pututxline(&utx) == NULL) {
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perror(*id);
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ret = 1;
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}
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}
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return (ret);
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}
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static int
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boot(short type)
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{
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struct utmpx utx = { .ut_type = type };
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(void)gettimeofday(&utx.ut_tv, NULL);
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if (pututxline(&utx) == NULL) {
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perror("pututxline");
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return (1);
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}
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return (0);
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}
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int
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main(int argc, char *argv[])
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{
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if (argc >= 2 && strcmp(getprogname(), "utxrm") == 0)
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/* For compatibility. */
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return (rm(&argv[1]));
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else if (argc == 2 && strcmp(argv[1], "boot") == 0)
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return (boot(BOOT_TIME));
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else if (argc == 2 && strcmp(argv[1], "shutdown") == 0)
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return (boot(SHUTDOWN_TIME));
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else if (argc >= 3 && strcmp(argv[1], "rm") == 0)
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return (rm(&argv[2]));
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fprintf(stderr,
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"usage: utx boot\n"
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" utx shutdown\n"
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" utx rm identifier ...\n"
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" utxrm identifier ...\n");
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exit(1);
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}
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