Initial commit of files

src/libnet/log_file.c

@@ -0,0 +1,100 @@
+//
+// Logging
+//
+
+#include "netlib.h"
+#include "strlib.h"
+
+#include <stdarg.h>
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <time.h>
+#include <sys/time.h>
+
+static char szLogPath[MAXPATHLEN-5] = "/var/log/" VAR_LOG_RUN_NAME "/";
+static char szLogFile[MAXPATHLEN-5];
+static FILE *pLog = NULL;
+static char bLogFlag = 1;
+
+void log_on(void)
+{
+  bLogFlag = 1;
+}
+
+void log_off(void)
+{
+  bLogFlag = 0;
+}
+
+void log_exit( void )
+{
+  if ( pLog )
+  {
+    log_printf( "Closed logfile (euid = %d.%d)", geteuid(), getegid() );
+    fclose( pLog );
+  }
+}
+
+void log_path( const char *pszPath )
+{
+  strlcpy( szLogPath, pszPath, sizeof(szLogPath) );
+}
+
+FILE *log_open( const char *pszFile )
+{
+  mkdir(szLogPath, 0776);
+  snprintf(szLogFile, MAXPATHLEN-1, "%s%s.log", szLogPath, pszFile);
+  
+  if ( (pLog = fopen( szLogFile, "a" )) )
+  {
+    log_printf( "Opened logfile: %s (uid = %d.%d)", szLogFile, getuid(), getgid() );
+    atexit( log_exit );
+  }
+  else
+  {
+    perror( szLogFile );
+  }
+  return pLog;
+}
+
+void log_write( const char *msg )
+{
+  if ( !pLog || !bLogFlag || !msg || !strlen(msg) )
+    return;
+  
+  /* time stamp it */
+  time_t t = time(NULL);
+  struct tm *tm = localtime( &t );
+  char szBuf[30];
+  strftime( szBuf, sizeof(szBuf), "%F %T ", tm );
+  
+  fprintf( pLog, "%s %s\n", szBuf, msg );
+  fflush( pLog );
+}
+
+void log_printf( const char *fmt, ... )
+{
+  va_list ap;
+  if ( !pLog || !bLogFlag || !fmt )
+    return;
+  
+  /* time stamp it */
+  time_t t = time(NULL);
+  struct tm *tm = localtime( &t );
+  char szBuf[30];
+  strftime( szBuf, sizeof(szBuf), "%F %T  ", tm );
+  fprintf( pLog, "%s", szBuf );
+  
+  va_start( ap, fmt );
+  vfprintf( pLog, fmt, ap );
+  va_end( ap );
+  fputs( "\n", pLog );
+  fflush( pLog );
+}
+
+void log_error( const char *msg )
+{
+  perror(msg);
+  log_printf( "%s (%s)", msg, strerror(errno) );
+}