mirror of
https://github.com/systemd/systemd-stable.git
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128 lines
2.7 KiB
C
128 lines
2.7 KiB
C
/*
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* udeveventrecorder.c
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*
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* Copyright (C) 2004-2005 SuSE Linux Products GmbH
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* Author:
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* Olaf Hering <olh@suse.de>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#include <errno.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/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include "udev.h"
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#include "udev_version.h"
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#include "udev_utils.h"
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#include "logging.h"
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#define BUFSIZE 12345
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#define FNSIZE 123
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static int log = 0;
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#ifdef USE_LOG
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void log_message (int priority, const char *format, ...)
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{
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va_list args;
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if (priority > log)
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return;
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va_start(args, format);
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vsyslog(priority, format, args);
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va_end(args);
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}
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#endif
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int main(int argc, char **argv, char **envp)
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{
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int fd, i;
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unsigned long seq;
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char **ep = envp;
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char *buf, *p, *a;
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struct stat sb;
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const char *env;
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if (stat("/events", &sb) || !(S_ISDIR(sb.st_mode)))
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return 0;
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env = getenv("UDEV_LOG");
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if (env)
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log = log_priority(env);
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logging_init("udeveventrecorder");
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dbg("version %s", UDEV_VERSION);
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p = getenv("SEQNUM");
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a = getenv("ACTION");
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buf = malloc(FNSIZE);
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if (!(buf && a && argv[1]))
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goto error;
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if (p)
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seq = strtoul(p, NULL, 0);
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else
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seq = 0;
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snprintf(buf, FNSIZE, "/events/debug.%05lu.%s.%s.%u", seq, argv[1], a ? a : "", getpid());
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if ((fd = open(buf, O_CREAT | O_WRONLY | O_TRUNC, 0644)) < 0) {
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err("error creating '%s'", buf);
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goto error;
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}
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free(buf);
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p = malloc(BUFSIZE);
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buf = p;
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buf += snprintf(buf, p + BUFSIZE - buf, "set --");
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for (i = 1; i < argc; ++i) {
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buf += snprintf(buf, p + BUFSIZE - buf, " %s", argv[i]);
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if (buf > p + BUFSIZE)
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goto full;
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}
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buf += snprintf(buf, p + BUFSIZE - buf, "\n");
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if (buf > p + BUFSIZE)
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goto full;
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while (*ep) {
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unsigned char *t;
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t = memchr(*ep, '=', strlen(*ep));
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if (t) {
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*t = '\0';
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t++;
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buf += snprintf(buf, p + BUFSIZE - buf, "%s='%s'\n", *ep, t);
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--t;
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*t = '=';
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}
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ep++;
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if (buf > p + BUFSIZE)
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break;
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}
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full:
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buf = p;
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write(fd, buf, strlen(buf));
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close(fd);
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free(buf);
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return 0;
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error:
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fprintf(stderr, "record enviroment to /events, to be called from udev context\n");
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return 1;
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}
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