move files from lib/plugins to src/plugins

1 files changed, 214 insertions, 0 deletions

diff --git a/src/plugins/KerneloopsScanner.cpp b/src/plugins/KerneloopsScanner.cpp
new file mode 100644
index 00000000..d187daa9
--- /dev/null
+++ b/src/plugins/KerneloopsScanner.cpp
@@ -0,0 +1,214 @@
+/*
+    Copyright (C) 2010  ABRT team
+    Copyright (C) 2010  RedHat Inc
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+    Authors:
+    Anton Arapov <anton@redhat.com>
+    Arjan van de Ven <arjan@linux.intel.com>
+*/
+#include <syslog.h>
+#include <asm/unistd.h> /* __NR_syslog */
+#include <glib.h>
+#include "abrtlib.h"
+#include "abrt_exception.h"
+#include "comm_layer_inner.h"
+#include "KerneloopsSysLog.h"
+#include "KerneloopsScanner.h"
+
+// TODO: https://fedorahosted.org/abrt/ticket/78
+
+static int scan_dmesg(GList **oopsList)
+{
+    VERB1 log("Scanning dmesg");
+
+    /* syslog(3) - read the last len bytes from the log buffer
+     * (non-destructively), but dont read more than was written
+     * into the buffer since the last"clear ring buffer" cmd.
+     * Returns the number of bytes read.
+     */
+    char *buffer = (char*)xzalloc(16*1024);
+    syscall(__NR_syslog, 3, buffer, 16*1024 - 1); /* always NUL terminated */
+    int cnt_FoundOopses = extract_oopses(oopsList, buffer, strlen(buffer));
+    free(buffer);
+
+    return cnt_FoundOopses;
+}
+
+
+/* "dumpoops" tool uses these two functions too */
+extern "C" {
+
+int scan_syslog_file(GList **oopsList, const char *filename, time_t *last_changed_p)
+{
+    VERB1 log("Scanning syslog file '%s'", filename);
+
+    char *buffer;
+    struct stat statb;
+    int fd;
+    int cnt_FoundOopses;
+    ssize_t sz;
+    fd = open(filename, O_RDONLY);
+    if (fd < 0)
+        return 0;
+    statb.st_size = 0; /* paranoia */
+    if (fstat(fd, &statb) != 0 || statb.st_size < 1)
+    {
+        close(fd);
+        return 0;
+    }
+
+    if (last_changed_p != NULL)
+    {
+        if (*last_changed_p == statb.st_mtime)
+        {
+            VERB1 log("Syslog file '%s' hasn't changed since last scan, skipping", filename);
+            close(fd);
+            return 0;
+        }
+        *last_changed_p = statb.st_mtime;
+    }
+
+    /*
+     * In theory we have a race here, since someone could spew
+     * to /var/log/messages before we read it in... we try to
+     * deal with it by reading at most 10kbytes extra. If there's
+     * more than that.. any oops will be in dmesg anyway.
+     * Do not try to allocate an absurd amount of memory; ignore
+     * older log messages because they are unlikely to have
+     * sufficiently recent data to be useful.  32MB is more
+     * than enough; it's not worth looping through more log
+     * if the log is larger than that.
+     */
+    sz = statb.st_size + 10*1024;
+    if (statb.st_size > (32*1024*1024 - 10*1024))
+    {
+        xlseek(fd, statb.st_size - (32*1024*1024 - 10*1024), SEEK_SET);
+        sz = 32*1024*1024;
+    }
+    buffer = (char*)xzalloc(sz);
+    sz = full_read(fd, buffer, sz);
+    close(fd);
+
+    cnt_FoundOopses = 0;
+    if (sz > 0)
+        cnt_FoundOopses = extract_oopses(oopsList, buffer, sz);
+    free(buffer);
+
+    return cnt_FoundOopses;
+}
+
+/* returns number of errors */
+int save_oops_to_debug_dump(GList **oopsList)
+{
+    unsigned countdown = 16; /* do not report hundreds of oopses */
+    unsigned idx = g_list_length(*oopsList);
+    time_t t = time(NULL);
+    pid_t my_pid = getpid();
+
+    VERB1 log("Saving %u oopses as crash dump dirs", idx >= countdown ? countdown-1 : idx);
+
+    int errors = 0;
+
+    while (idx != 0 && --countdown != 0)
+    {
+        char path[sizeof(DEBUG_DUMPS_DIR"/kerneloops-%lu-%lu-%lu") + 3 * sizeof(long)*3];
+        sprintf(path, DEBUG_DUMPS_DIR"/kerneloops-%lu-%lu-%lu", (long)t, (long)my_pid, (long)idx);
+
+        char *first_line = (char*)g_list_nth_data(*oopsList,--idx);
+        char *second_line = (char*)strchr(first_line, '\n'); /* never NULL */
+        *second_line++ = '\0';
+
+        struct dump_dir *dd = dd_create(path, /*uid:*/ 0);
+        if (dd)
+        {
+            dd_save_text(dd, FILENAME_ANALYZER, "Kerneloops");
+            dd_save_text(dd, FILENAME_EXECUTABLE, "kernel");
+            dd_save_text(dd, FILENAME_KERNEL, first_line);
+            dd_save_text(dd, FILENAME_CMDLINE, "not_applicable");
+            dd_save_text(dd, FILENAME_BACKTRACE, second_line);
+            /* Optional, makes generated bz more informative */
+            strchrnul(second_line, '\n')[0] = '\0';
+            dd_save_text(dd, FILENAME_REASON, second_line);
+            dd_close(dd);
+        }
+        else
+            errors++;
+    }
+
+    return errors;
+}
+
+} /* extern "C" */
+
+
+CKerneloopsScanner::CKerneloopsScanner()
+{
+    int cnt_FoundOopses;
+    m_syslog_last_change = 0;
+
+    /* Scan dmesg, on first call only */
+    GList *oopsList = NULL;
+    cnt_FoundOopses = scan_dmesg(&oopsList);
+    if (cnt_FoundOopses > 0)
+    {
+        int errors = save_oops_to_debug_dump(&oopsList);
+        if (errors > 0)
+            log("%d errors while dumping oopses", errors);
+    }
+}
+
+void CKerneloopsScanner::Run(const char *pActionDir, const char *pArgs, int force)
+{
+    const char *syslog_file = "/var/log/messages";
+    map_plugin_settings_t::const_iterator it = m_pSettings.find("SysLogFile");
+    if (it != m_pSettings.end())
+        syslog_file = it->second.c_str();
+
+    GList *oopsList = NULL;
+    int cnt_FoundOopses = scan_syslog_file(&oopsList, syslog_file, &m_syslog_last_change);
+    if (cnt_FoundOopses > 0)
+    {
+        int errors = save_oops_to_debug_dump(&oopsList);
+        if (errors > 0)
+            log("%d errors while dumping oopses", errors);
+        /*
+         * This marker in syslog file prevents us from
+         * re-parsing old oopses (any oops before it is
+         * ignored by scan_syslog_file()). The only problem
+         * is that we can't be sure here that syslog_file
+         * is the file where syslog(xxx) stuff ends up.
+         */
+        openlog("abrt", 0, LOG_KERN);
+        syslog(LOG_WARNING,
+               "Kerneloops: Reported %u kernel oopses to Abrt",
+               cnt_FoundOopses);
+        closelog();
+    }
+
+    for (GList *li = oopsList; li != NULL; li = g_list_next(li))
+        free((char*)li->data);
+    g_list_free(oopsList);
+}
+
+PLUGIN_INFO(ACTION,
+            CKerneloopsScanner,
+            "KerneloopsScanner",
+            "0.0.1",
+            _("Periodically scans for and saves kernel oopses"),
+            "anton@redhat.com",
+            "http://people.redhat.com/aarapov",
+            "");