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24 * if and wherever such third-party acknowledgments normally appear.
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47 * ====================================================================
49 * This software consists of voluntary contributions made by many
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52 * <http://www.apache.org/>.
56 * Simple program to rotate Apache logs without having to kill the server.
58 * Contributed by Ben Laurie <ben@algroup.co.uk>
88 int main (int argc, char *argv[])
90 char buf[BUFSIZE], buf2[MAX_PATH], errbuf[ERRMSGSZ];
91 time_t tLogEnd = 0, tRotation;
92 int nLogFD = -1, nLogFDprev = -1, nMessCount = 0, nRead, nWrite;
97 "%s <logfile> <rotation time in seconds>\n\n",
101 "Add this:\n\nTransferLog \"|%s.exe /some/where 86400\"\n\n",
105 "Add this:\n\nTransferLog \"|%s /some/where 86400\"\n\n",
109 "to httpd.conf. The generated name will be /some/where.nnnn "
110 "where nnnn is the\nsystem time at which the log nominally "
111 "starts (N.B. this time will always be a\nmultiple of the "
112 "rotation time, so you can synchronize cron scripts with it).\n"
113 "At the end of each rotation time a new log is started.\n");
118 tRotation = atoi(argv[2]);
119 if (tRotation <= 0) {
120 fprintf(stderr, "Rotation time must be > 0\n");
125 nRead = read(0, buf, sizeof buf);
131 if (nLogFD >= 0 && (time(NULL) >= tLogEnd || nRead < 0)) {
136 time_t tLogStart = (time(NULL) / tRotation) * tRotation;
137 sprintf(buf2, "%s.%010d", szLogRoot, (int) tLogStart);
138 tLogEnd = tLogStart + tRotation;
139 nLogFD = open(buf2, O_WRONLY | O_CREAT | O_APPEND, 0666);
141 /* Uh-oh. Failed to open the new log file. Try to clear
142 * the previous log file, note the lost log entries,
143 * and keep on truckin'. */
144 if (nLogFDprev == -1) {
151 "Resetting log file due to error opening "
152 "new log file. %10d messages lost.\n",
154 nWrite = strlen(errbuf);
158 ftruncate(nLogFD, 0);
160 write(nLogFD, errbuf, nWrite);
169 nWrite = write(nLogFD, buf, nRead);
170 } while (nWrite < 0 && errno == EINTR);
171 if (nWrite != nRead) {
174 "Error writing to log file. "
175 "%10d messages lost.\n",
177 nWrite = strlen(errbuf);
181 ftruncate(nLogFD, 0);
183 write (nLogFD, errbuf, nWrite);
189 /* Of course we never, but prevent compiler warnings */