Logger, by Ilya Kuzmich.

1 files changed, 119 insertions, 0 deletions

diff --git a/toys/pending/logger.c b/toys/pending/logger.c
new file mode 100644
index 00000000..af035193
--- /dev/null
+++ b/toys/pending/logger.c
@@ -0,0 +1,119 @@
+/* logger.c - Log messages.
+ *
+ * Copyright 2013 Ilya Kuzmich <ilya.kuzmich@gmail.com>
+ *
+ * See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/logger.html
+
+USE_LOGGER(NEWTOY(logger, "st:p:", TOYFLAG_USR|TOYFLAG_BIN))
+
+config LOGGER
+  bool "logger"
+  default n
+  help
+    usage: hello [-s] [-t tag] [-p [facility.]priority] [message]
+
+    Log message (or stdin) to syslog.
+*/
+
+#define FOR_logger
+#include "toys.h"
+#include <syslog.h>
+#include <strings.h>
+#include <string.h>
+
+GLOBALS(
+  char *priority_arg;
+  char *ident;
+
+  int facility;
+  int priority;
+)
+
+struct mapping {
+  const char *key;
+  int value;
+};
+
+static const struct mapping facilities[] = {
+  {"user", LOG_USER}, {"main", LOG_MAIL}, {"news", LOG_NEWS},
+  {"uucp", LOG_UUCP}, {"daemon", LOG_DAEMON}, {"auth", LOG_AUTH},
+  {"cron", LOG_CRON}, {"lpr", LOG_LPR}, {"local0", LOG_LOCAL0},
+  {"local1", LOG_LOCAL1}, {"local2", LOG_LOCAL2}, {"local3", LOG_LOCAL3},
+  {"local4", LOG_LOCAL4}, {"local5", LOG_LOCAL5}, {"local6", LOG_LOCAL6},
+  {"local7", LOG_LOCAL7},
+  {NULL, 0}
+};
+
+static const struct mapping priorities[] = {
+  {"emerg", LOG_EMERG}, {"alert", LOG_ALERT}, {"crit", LOG_CRIT},
+  {"err", LOG_ERR}, {"warning", LOG_WARNING}, {"notice", LOG_NOTICE},
+  {"info", LOG_INFO}, {"debug", LOG_DEBUG},
+  {NULL, 0}
+};
+
+static int lookup(const struct mapping *where, const char *key)
+{
+  int i;
+  for (i = 0; where[i].key; i++)
+    if (!strcasecmp(key, where[i].key))
+      return where[i].value;
+
+  return -1;
+}
+
+static void parse_priority()
+{
+  char *sep = strchr(TT.priority_arg, '.');
+
+  if (sep)
+  {
+    *sep = '\0';
+    if ((TT.facility = lookup(facilities, TT.priority_arg)) == -1)
+      error_exit("bad facility: %s", TT.priority_arg);
+    TT.priority_arg = sep+1;
+  }
+
+  if ((TT.priority = lookup(priorities, TT.priority_arg)) == -1)
+    error_exit("bad priority: %s", TT.priority_arg);
+}
+
+void logger_main(void)
+{
+  if (toys.optflags & FLAG_p)
+    parse_priority();
+  else
+  {
+    TT.facility = LOG_USER;
+    TT.priority = LOG_NOTICE;
+  }
+
+  if (!(toys.optflags & FLAG_t))
+  {
+    struct passwd *pw = getpwuid(geteuid());
+    if (!pw)
+      perror_exit("getpwuid");
+    TT.ident = xstrdup(pw->pw_name);
+  }
+
+  char *message = NULL;
+  if (toys.optc) {
+    int length = 0;
+    int pos = 0;
+
+    for (;*toys.optargs; (void) *(toys.optargs)++) // shut up gcc
+    {
+      length += strlen(*(toys.optargs)) + 1; // plus one for the args spacing
+      message = xrealloc(message, length + 1); // another one for the null byte
+
+      sprintf(message + pos, "%s ", *toys.optargs);
+      pos = length;
+    }
+  } else {
+    toybuf[readall(0, toybuf, 4096-1)] = '\0';
+    message = toybuf;
+  }
+
+  openlog(TT.ident, (toys.optflags & FLAG_s ? LOG_PERROR : 0) , TT.facility);
+  syslog(TT.priority, "%s", message);
+  closelog();
+}