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authorJonas Suhr Christensen <jsc@umbraculum.org>2012-12-12 13:40:02 +0100
committerJonas Suhr Christensen <jsc@umbraculum.org>2012-12-12 13:40:02 +0100
commit1438a5288e1e3392c654bbe55f0cf4b65ef603b4 (patch)
tree2f686253b415865e09ab29f6e405f11f54f77b14 /debug_syslog.c
parent05ac57f641237f0cdb8554b58f78dab5effe6dd9 (diff)
Ready for use. If you run Linux.
Diffstat (limited to 'debug_syslog.c')
-rw-r--r--debug_syslog.c113
1 files changed, 110 insertions, 3 deletions
diff --git a/debug_syslog.c b/debug_syslog.c
index fb7ab2f..c5d9dbc 100644
--- a/debug_syslog.c
+++ b/debug_syslog.c
@@ -46,9 +46,12 @@
#define SYSLOG_CONTENTLEN SYSLOG_MSGLEN - SYSLOG_PRILEN - SYSLOG_TIMELEN - SYSLOG_TAGLEN
//#define SYSLOG_CONTENTLEN SYSLOG_MSGLEN - SYSLOG_PRILEN - SYSLOG_TAGLEN - SYSLOG_HEADERLEN -1
+#define SYSLOG_LENOFEXECNAME 256
static int dbg_syslog_sock;
static struct sockaddr_in dbg_syslog_sockaddr;
+static pid_t pid;
+static char execname[SYSLOG_LENOFEXECNAME];
void dbg_syslog_init(const char* host, int port)
{
@@ -61,8 +64,32 @@ void dbg_syslog_init(const char* host, int port)
dbg_syslog_sockaddr.sin_family = AF_INET;
dbg_syslog_sockaddr.sin_addr.s_addr = inet_addr(host);
dbg_syslog_sockaddr.sin_port = htons(port);
+
+ // This implementation has all kind of possible errors:
+ // * It is Linux only
+ // * Max length of execname (including path, avoid this by cmdline file in reverse order)
+ // is set to SYSLOG_LENOFEXECNAME
+ // * If not found execname is ""
+ pid = getpid();
+ char buf[SYSLOG_LENOFEXECNAME];
+ FILE* f = fopen("/proc/self/cmdline", "r");
+ if(f) {
+ fgets(buf, SYSLOG_LENOFEXECNAME, f);
+ fclose(f);
+ }
+
+ char* bufptr = strrchr(buf, '/');
+ if(bufptr) {
+ strncpy(execname, bufptr+1, SYSLOG_LENOFEXECNAME-1);
+ }
+ else {
+ strcpy(execname, "\0");
+ }
+
+ printf("\tRunning as %s with pid %d\n", execname, pid);
}
+/*
void dbg_syslog_createheader() {
const time_t rawtime = time(NULL);
struct tm time;
@@ -74,6 +101,83 @@ void dbg_syslog_createheader() {
char buftag[SYSLOG_TAGLEN] = "PROGRAM[PID]: ";
}
+*/
+
+/*
+ * Syslog message specification (based on rfc3164).
+ * Modified after reading syslog v2. documentation
+ *
+ * MSG: "<%d%d>%s %s %s%c%s", FACILITY, SEVERITY, TIME, CLIENT, TAG, DELIM, CONTENT
+ *
+ * Example:
+ * <34>Oct 11 22:14:15 mymachine su: 'su root' failed for lonvick on /dev/pts/8
+ *
+ *
+ * NOTE! Length of MSG must not exceed 1024 characters!
+ *
+ * FACILITY:
+ * 0 kernel messages
+ * 1 user-level messages
+ * 2 mail system
+ * 3 system daemons
+ * 4 security/authorization messages (note 1)
+ * 5 messages generated internally by syslogd
+ * 6 line printer subsystem
+ * 7 network news subsystem
+ * 8 UUCP subsystem
+ * 9 clock daemon (note 2)
+ * 10 security/authorization messages (note 1)
+ * 11 FTP daemon
+ * 12 NTP subsystem
+ * 13 log audit (note 1)
+ * 14 log alert (note 1)
+ * 15 clock daemon (note 2)
+ * 16 local use 0 (local0)
+ * 17 local use 1 (local1)
+ * 18 local use 2 (local2)
+ * 19 local use 3 (local3)
+ * 20 local use 4 (local4)
+ * 21 local use 5 (local5)
+ * 22 local use 6 (local6)
+ * 23 local use 7 (local7)
+ *
+ * SEVERITY:
+ * 0 Emergency: system is unusable
+ * 1 Alert: action must be taken immediately
+ * 2 Critical: critical conditions
+ * 3 Error: error conditions
+ * 4 Warning: warning conditions
+ * 5 Notice: normal but significant condition
+ * 6 Informational: informational messages
+ * 7 Debug: debug-level messages
+ *
+ * TIME:
+ * Time of message formatted like: Mmm dd hh:mm:ss
+ *
+ * CLIENT:
+ * Hostname or
+ * IPv4 address or
+ * IPv6 address
+ *
+ * TAG: format: PROGRAM[PID]
+ * Program or process information
+ * PROGRAM is Alphanumeric
+ * PID is numeric
+ * Must not exceed 32 characters
+ *
+ * DELIM:
+ * A nonn-alphanumeric character (eg. ':', '[' ...)
+ * In implementation DELIM is the first character of CONTENT
+ *
+ * CONTENT:
+ * The message to log.
+ * String of printable characters
+ *
+ * */
+
+static void _calculate_pri() {
+
+}
void dbg_syslog_output(char* msg)
{
@@ -85,8 +189,11 @@ void dbg_syslog_output(char* msg)
char buftime[SYSLOG_TIMELEN];
strftime(buftime, SYSLOG_TIMELEN, "%b %e %H:%M:%S ", &time);
- char bufpri[SYSLOG_PRILEN] = "<20>";
- char buftag[SYSLOG_TAGLEN] = "PROGRAM[PID]: ";
+ // Currently everything is mapped to local facility 4 as debug
+ char bufpri[SYSLOG_PRILEN] = "<167>";
+
+ char buftag[SYSLOG_TAGLEN];
+ snprintf(buftag, SYSLOG_TAGLEN, "%s[%d]: ", execname, pid);
char buf[SYSLOG_MSGLEN];
memset(buf, 0, sizeof(buf));
@@ -97,7 +204,7 @@ void dbg_syslog_output(char* msg)
strcat(buf, "\n");
- printf("Sending to syslog: %s\n", buf);
+// printf("Sending to syslog: %s\n", buf);
int buf_len = strlen(buf);
if((sendto(dbg_syslog_sock, buf, buf_len, 0, (struct sockaddr *) &dbg_syslog_sockaddr,
sizeof(dbg_syslog_sockaddr))) != buf_len) {