X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Freadutmp.c;h=f39535299404e5702055be83f523a418150fd8da;hb=378873e8508590d356a540e5db32592750fb18b8;hp=e4caa82e68e464105c16d0d5e146a68a759d898a;hpb=55b799acc33983a85f56baf9139ac12e9288537b;p=gnulib.git

diff --git a/lib/readutmp.c b/lib/readutmp.c
index e4caa82e6..f39535299 100644
--- a/lib/readutmp.c
+++ b/lib/readutmp.c
@@ -1,5 +1,5 @@
 /* GNU's read utmp module.
-   Copyright (C) 92, 93, 94, 95, 96, 1997 Free Software Foundation, Inc.
+   Copyright (C) 1992-1999 Free Software Foundation, 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
@@ -19,6 +19,8 @@
 
 #include <config.h>
 
+#include <stdio.h>
+
 #include <sys/stat.h>
 #if defined(STDC_HEADERS) || defined(HAVE_STRING_H)
 # include <string.h>
@@ -27,18 +29,15 @@
 #endif /* STDC_HEADERS || HAVE_STRING_H */
 
 #include "readutmp.h"
-#include "error.h"
 
 char *xmalloc ();
-
-STRUCT_UTMP *utmp_contents = 0;
+char *realloc ();
 
 /* Copy UT->ut_name into storage obtained from malloc.  Then remove any
    trailing spaces from the copy, NUL terminate it, and return the copy.  */
 
 char *
-extract_trimmed_name (ut)
-  const STRUCT_UTMP *ut;
+extract_trimmed_name (const STRUCT_UTMP *ut)
 {
   char *p, *trimmed_name;
 
@@ -53,43 +52,81 @@ extract_trimmed_name (ut)
   return trimmed_name;
 }
 
-/* Read the utmp file FILENAME into UTMP_CONTENTS and return the
-   number of entries it contains. */
+/* Read the utmp entries corresponding to file FILENAME into freshly-
+   malloc'd storage, set *UTMP_BUF to that pointer, set *N_ENTRIES to
+   the number of entries, and return zero.  If there is any error,
+   return non-zero and don't modify the parameters.  */
+
+#if HAVE_UTMPNAME
+
+int
+read_utmp (const char *filename, int *n_entries, STRUCT_UTMP **utmp_buf)
+{
+  int n_read;
+  STRUCT_UTMP *u;
+  STRUCT_UTMP *utmp = NULL;
+
+  /* Ignore the return value for now.
+     Solaris' utmpname returns 1 upon success -- which is contrary
+     to what the GNU libc version does.  In addition, older GNU libc
+     versions are actually void.   */
+  UTMP_NAME_FUNCTION (filename);
+
+  SET_UTMP_ENT ();
+
+  n_read = 0;
+  while ((u = GET_UTMP_ENT ()) != NULL)
+    {
+      ++n_read;
+      utmp = (STRUCT_UTMP *) realloc (utmp, n_read * sizeof (STRUCT_UTMP));
+      if (utmp == NULL)
+	return 1;
+      utmp[n_read - 1] = *u;
+    }
+
+  END_UTMP_ENT ();
+
+  *n_entries = n_read;
+  *utmp_buf = utmp;
+
+  return 0;
+}
+
+#else
 
 int
-read_utmp (filename)
-  const char *filename;
+read_utmp (const char *filename, int *n_entries, STRUCT_UTMP **utmp_buf)
 {
   FILE *utmp;
   struct stat file_stats;
   size_t n_read;
   size_t size;
-
-  if (utmp_contents)
-    {
-      free (utmp_contents);
-      utmp_contents = 0;
-    }
+  STRUCT_UTMP *buf;
 
   utmp = fopen (filename, "r");
   if (utmp == NULL)
-    error (1, errno, "%s", filename);
+    return 1;
 
   fstat (fileno (utmp), &file_stats);
   size = file_stats.st_size;
   if (size > 0)
-    utmp_contents = (STRUCT_UTMP *) xmalloc (size);
+    buf = (STRUCT_UTMP *) xmalloc (size);
   else
     {
       fclose (utmp);
-      return 0;
+      return 1;
     }
 
   /* Use < instead of != in case the utmp just grew.  */
-  n_read = fread (utmp_contents, 1, size, utmp);
+  n_read = fread (buf, 1, size, utmp);
   if (ferror (utmp) || fclose (utmp) == EOF
       || n_read < size)
-    error (1, errno, "%s", filename);
+    return 1;
 
-  return size / sizeof (STRUCT_UTMP);
+  *n_entries = size / sizeof (STRUCT_UTMP);
+  *utmp_buf = buf;
+
+  return 0;
 }
+
+#endif /* HAVE_UTMPNAME */