b2f096aeb9
- support for link state notification (e.g. renew lease after carrier returned) - support to start go into background immediately - don't cleanup interface state. dhcpcd will leave the interface in the same state as before if the lease uses separate addresses. -p still stops it from removing the configured address on exit - various smaller bugfixes, optimisations and cleanups
119 lines
3.0 KiB
C
119 lines
3.0 KiB
C
/*
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* dhcpcd - DHCP client daemon
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* Copyright 2006-2008 Roy Marples <roy@marples.name>
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* All rights reserved
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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 <ctype.h>
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#include <stdarg.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 <syslog.h>
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#include "common.h"
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#include "logger.h"
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static int loglevel = LOG_INFO;
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static char logprefix[12] = {0};
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struct logname {
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int level;
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const char *name;
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};
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static const struct logname const lognames[] = {
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{ LOG_DEBUG, "debug" },
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{ LOG_INFO, "info" },
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{ LOG_WARNING, "warning" },
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{ LOG_ERR, "error" },
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{ -1, NULL }
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};
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int
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logtolevel(const char *priority)
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{
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const struct logname *lt;
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if (isdigit((unsigned char)*priority))
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return atoi(priority);
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for (lt = lognames; lt->name; lt++)
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if (!strcasecmp(priority, lt->name))
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return lt->level;
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return -1;
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}
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void
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setloglevel(int level)
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{
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loglevel = level;
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}
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void
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setlogprefix(const char *prefix)
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{
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strlcpy(logprefix, prefix, sizeof(logprefix));
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}
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void
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logger(int level, const char *fmt, ...)
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{
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va_list p, p2;
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FILE *f = stderr;
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size_t len, fmt2len;
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char *fmt2, *pf;
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va_start(p, fmt);
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va_copy(p2, p);
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if (level <= LOG_ERR || level <= loglevel) {
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fprintf(f, "%s", logprefix);
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vfprintf(f, fmt, p);
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fputc('\n', f);
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/* stdout, stderr may be re-directed to some kind of buffer.
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* So we always flush to ensure it's written. */
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fflush(f);
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}
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if (level < LOG_DEBUG || level <= loglevel) {
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len = strlen(logprefix);
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fmt2len = strlen(fmt) + len + 1;
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fmt2 = pf = malloc(sizeof(char) * fmt2len);
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if (fmt2) {
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strlcpy(pf, logprefix, fmt2len);
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pf += len;
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strlcpy(pf, fmt, fmt2len - len);
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vsyslog(level, fmt2, p2);
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free(fmt2);
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} else {
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vsyslog(level, fmt, p2);
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syslog(LOG_ERR, "logger: memory exhausted");
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exit(EXIT_FAILURE);
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}
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}
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va_end(p2);
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va_end(p);
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}
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