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-rw-r--r--stdlib/fmtmsg.c358
1 files changed, 358 insertions, 0 deletions
diff --git a/stdlib/fmtmsg.c b/stdlib/fmtmsg.c
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index 0000000000..9ce492bdc4
--- /dev/null
+++ b/stdlib/fmtmsg.c
@@ -0,0 +1,358 @@
+/* Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <fmtmsg.h>
+#include <libc-lock.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/syslog.h>
+
+
+/* We have global data, protect the modification.  */
+__libc_lock_define_initialized (static, lock)
+
+
+enum
+{
+  label_mask = 0x01,
+  severity_mask = 0x02,
+  text_mask = 0x04,
+  action_mask = 0x08,
+  tag_mask = 0x10,
+  all_mask = label_mask | severity_mask | text_mask | action_mask | tag_mask
+};
+
+static struct
+{
+  const char *name;
+  size_t len;
+} keywords[] =
+  {
+    { "label", 5 },
+    { "severity", 8 },
+    { "text", 4 },
+    { "action", 6},
+    { "tag", 3 }
+  };
+#define NKEYWORDS (sizeof( keywords) / sizeof (keywords[0]))
+
+
+struct severity_info
+{
+  int severity;
+  const char *string;
+  struct severity_info *next;
+};
+
+
+/* List of known severities.  */
+static const struct severity_info nosev =
+{
+  MM_NOSEV, "", NULL
+};
+static const struct severity_info haltsev =
+{
+  MM_HALT, "HALT", (struct severity_info *) &nosev
+};
+static const struct severity_info errorsev =
+{
+  MM_ERROR, "ERROR", (struct severity_info *) &haltsev
+};
+static const struct severity_info warningsev =
+{
+  MM_WARNING, "WARNING", (struct severity_info *) &errorsev
+};
+static const struct severity_info infosev =
+{
+  MM_INFO, "INFO", (struct severity_info *) &warningsev
+};
+
+/* Start of the list.  */
+static struct severity_info *severity_list = (struct severity_info *) &infosev;
+
+
+/* Prototypes for local functions.  */
+static int internal_addseverity (int severity, const char *string);
+
+
+int
+fmtmsg (long int classification, const char *label, int severity,
+	const char *text, const char *action, const char *tag)
+{
+  static int print = -1;
+  int result = MM_OK;
+  struct severity_info *severity_rec;
+
+  if (print == -1)
+    {
+      __libc_lock_lock (lock);
+
+      if (print == -1)
+	{
+	  const char *msgverb_var = getenv ("MSGVERB");
+	  const char *sevlevel_var = getenv ("SEV_LEVEL");
+
+	  if (msgverb_var != NULL && msgverb_var[0] != '\0')
+	    {
+	      /* Using this extra variable allows us to work without
+		 locking.  */
+	      print = 0;
+
+	      do
+		{
+		  size_t cnt;
+
+		  for (cnt = 0; cnt < NKEYWORDS; ++cnt)
+		    if (memcmp (msgverb_var,
+				keywords[cnt].name, keywords[cnt].len) == 0
+			&& (msgverb_var[keywords[cnt].len] == ':'
+			    || msgverb_var[keywords[cnt].len] == '\0'))
+		      break;
+
+		  if (cnt < NKEYWORDS)
+		    {
+		      print |= 1 << cnt;
+
+		      msgverb_var += keywords[cnt].len;
+		      if (msgverb_var[0] == ':')
+			++msgverb_var;
+		    }
+		  else
+		    {
+		     /* We found an illegal keyword in the
+			environment variable.  The specifications say
+			that we print all fields.  */
+		      print = all_mask;
+		      break;
+		    }
+		}
+	      while (msgverb_var[0] != '\0');
+	    }
+	  else
+	    print = all_mask;
+
+
+	  if (sevlevel_var != NULL)
+	    while (sevlevel_var[0] != '\0')
+	      {
+		const char *end = strchr (sevlevel_var, ':');
+		int level;
+
+		if (end == NULL)
+		  end = strchr (sevlevel_var, '\0');
+
+		/* First field: keyword.  This is not used here but it
+		   must be present.  */
+		while (sevlevel_var < end)
+		  if (*sevlevel_var++ == ',')
+		    break;
+
+		if (sevlevel_var < end)
+		  {
+		    /* Second field: severity level, a number.  */
+		    char *cp;
+
+		    level = strtol (sevlevel_var, &cp, 0);
+		    if (cp != sevlevel_var && cp < end && *cp++ == ','
+			&& level > MM_INFO)
+		      {
+			const char *new_string;
+
+			new_string = __strndup (cp, end - cp);
+
+			if (new_string != NULL
+			    && (internal_addseverity (level, new_string)
+				!= MM_OK))
+			  free ((char *) new_string);
+		      }
+		  }
+
+		sevlevel_var = end + (*end == ':' ? 1 : 0);
+	      }
+	}
+
+      __libc_lock_unlock (lock);
+    }
+
+  /* Start the real work.  First check whether the input is ok.  */
+  if (label != MM_NULLLBL)
+    {
+      /* Must be two fields, separated by a colon.  */
+      const char *cp = strchr (label, ':');
+      if (cp == NULL)
+	return MM_NOTOK;
+
+      /* The first field must not contain more then 10 bytes.  */
+      if (cp - label > 10
+	  /* The second field must not have more then 14 bytes.  */
+	  || strlen (cp + 1) > 14)
+	return MM_NOTOK;
+    }
+
+  for (severity_rec = severity_list; severity_rec != NULL;
+       severity_rec = severity_rec->next)
+    if (severity == severity_rec->severity)
+      /* Bingo.  */
+      break;
+
+  /* If we don't know anything about the severity level return an error.  */
+  if (severity_rec == NULL)
+    return MM_NOTOK;
+
+
+  /* Now we can print.  */
+  if (classification & MM_PRINT)
+    {
+      int do_label = (print & label_mask) && label != MM_NULLLBL;
+      int do_severity = (print & severity_mask) && severity != MM_NULLSEV;
+      int do_text = (print & text_mask) && text != MM_NULLTXT;
+      int do_action = (print & action_mask) && action != MM_NULLACT;
+      int do_tag = (print & tag_mask) && tag != MM_NULLTAG;
+
+      if (fprintf (stderr, "%s%s%s%s%s%s%s%s%s%s\n",
+		   do_label ? label : "",
+		   do_label && (do_severity | do_text) ? ": " : "",
+		   do_severity ? severity_rec->string : "",
+		   do_severity && do_text ? ": " : "",
+		   do_text ? text : "",
+		   (do_label | do_severity | do_text) && (do_action | do_tag)
+		   ? "\n" : "",
+		   do_action ? "TO FIX: " : "",
+		   do_action ? action : "",
+		   do_action && do_tag ? " " : "",
+		   do_tag ? tag : "") == EOF)
+	/* Oh, oh.  An error occured during the output.  */
+	result = MM_NOMSG;
+    }
+
+  if (classification & MM_CONSOLE)
+    {
+      int do_label = label != MM_NULLLBL;
+      int do_severity = severity != MM_NULLSEV;
+      int do_text = text != MM_NULLTXT;
+      int do_action = action != MM_NULLACT;
+      int do_tag = tag != MM_NULLTAG;
+
+      syslog (LOG_ERR, "%s%s%s%s%s%s%s%s%s%s\n",
+	      do_label ? label : "",
+	      do_label && (do_severity | do_text) ? ": " : "",
+	      do_severity ? severity_rec->string : "",
+	      do_severity && do_text ? ": " : "",
+	      do_text ? text : "",
+	      (do_label | do_severity | do_text) && (do_action | do_tag)
+	      ? "\n" : "",
+	      do_action ? "TO FIX: " : "",
+	      do_action ? action : "",
+	      do_action && do_tag ? " " : "",
+	      do_tag ? tag : "");
+    }
+
+  return result;
+}
+
+
+/* Add the new entry to the list.  */
+static int
+internal_addseverity (int severity, const char *string)
+{
+  struct severity_info *runp, *lastp;
+  int result = MM_OK;
+
+  /* First see if there is already a record for the severity level.  */
+  for (runp = severity_list, lastp = NULL; runp != NULL; runp = runp-> next)
+    if (runp->severity == severity)
+      break;
+    else
+      lastp = runp;
+
+  if (runp != NULL)
+    {
+      /* Release old string.  */
+      free ((char *) runp->string);
+
+      if (string != NULL)
+	/* Change the string.  */
+	runp->string = string;
+      else
+	{
+	  /* Remove the severity class.  */
+	  if (lastp == NULL)
+	    severity_list = runp->next;
+	  else
+	    lastp->next = runp->next;
+
+	  free (runp);
+	}
+    }
+  else if (string != NULL)
+    {
+      runp = malloc (sizeof (*runp));
+      if (runp == NULL)
+	result = MM_NOTOK;
+      else
+	{
+	  runp->severity = severity;
+	  runp->next = severity_list;
+	  runp->string = string;
+	  severity_list = runp;
+	}
+    }
+  else
+    /* We tried to remove a non-existing severity class.  */
+    result = MM_NOTOK;
+
+  return result;
+}
+
+
+/* Add new severity level or remove old one.  */
+int
+addseverity (int severity, const char *string)
+{
+  int result;
+  const char *new_string;
+
+  if (string == NULL)
+    /* We want to remove the severity class.  */
+    new_string = NULL;
+  else
+    {
+      new_string = __strdup (string);
+
+      if (new_string == NULL || severity <= MM_INFO)
+	/* Allocation failed or illegal value.  */
+	return MM_NOTOK;
+    }
+
+  /* Protect the global data.  */
+  __libc_lock_lock (lock);
+
+  /* Do the real work.  */
+  result = internal_addseverity (severity, string);
+
+  if (result != MM_OK)
+    /* Free the allocated string.  */
+    free ((char *) new_string);
+
+  /* Release the lock.  */
+  __libc_lock_unlock (lock);
+
+  return result;
+}