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Cleaning up some of the logging code
* src/util/logging.c: fix virLogDumpAllFD() to avoid snprintf, simplify the code and provide more useful signal descriptions. Also remove an unused variable.
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@ -30,6 +30,7 @@
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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 <signal.h>
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#if HAVE_SYSLOG_H
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# include <syslog.h>
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#endif
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@ -283,6 +284,9 @@ static void virLogStr(const char *str, int len) {
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static void virLogDumpAllFD(const char *msg, int len) {
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int i, found = 0;
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if (len <= 0)
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len = strlen(msg);
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for (i = 0; i < virLogNbOutputs;i++) {
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if (virLogOutputs[i].f == virLogOutputToFd) {
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int fd = (long) virLogOutputs[i].data;
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@ -308,24 +312,38 @@ static void virLogDumpAllFD(const char *msg, int len) {
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*/
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void
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virLogEmergencyDumpAll(int signum) {
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int ret = 0, len;
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char buf[100];
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if (virLogLen == 0)
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return;
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int len;
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virLogLock();
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snprintf(buf, sizeof(buf) - 1,
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"Caught signal %d, dumping internal log buffer:\n", signum);
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buf[sizeof(buf) - 1] = 0;
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virLogDumpAllFD(buf, strlen(buf));
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snprintf(buf, sizeof(buf) - 1, "\n\n ====== start of log =====\n\n");
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virLogDumpAllFD(buf, strlen(buf));
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switch (signum) {
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case SIGFPE:
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virLogDumpAllFD( "Caught signal Floating-point exception", -1);
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break;
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case SIGSEGV:
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virLogDumpAllFD( "Caught Segmentation violation", -1);
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break;
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case SIGILL:
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virLogDumpAllFD( "Caught illegal instruction", -1);
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break;
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case SIGABRT:
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virLogDumpAllFD( "Caught abort signal", -1);
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break;
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case SIGBUS:
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virLogDumpAllFD( "Caught bus error", -1);
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break;
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case SIGUSR2:
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virLogDumpAllFD( "Caught User-defined signal 2", -1);
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break;
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default:
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virLogDumpAllFD( "Caught unexpected signal", -1);
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break;
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}
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virLogDumpAllFD(" dumping internal log buffer:\n", -1);
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virLogDumpAllFD("\n\n ====== start of log =====\n\n", -1);
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while (virLogLen > 0) {
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if (virLogStart + virLogLen < LOG_BUFFER_SIZE) {
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virLogBuffer[virLogStart + virLogLen] = 0;
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virLogDumpAllFD(&virLogBuffer[virLogStart], virLogLen);
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ret += virLogLen;
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virLogStart += virLogLen;
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virLogLen = 0;
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} else {
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@ -336,8 +354,7 @@ virLogEmergencyDumpAll(int signum) {
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virLogStart = 0;
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}
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}
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snprintf(buf, sizeof(buf) - 1, "\n\n ====== end of log =====\n\n");
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virLogDumpAllFD(buf, strlen(buf));
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virLogDumpAllFD("\n\n ====== end of log =====\n\n", -1);
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virLogUnlock();
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}
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