added option file handling

1 files changed, 35 insertions, 0 deletions

diff --git a/util/fileutil.c b/util/fileutil.c
index e2ea9b20e..28bd866c5 100644
--- a/util/fileutil.c
+++ b/util/fileutil.c
@@ -21,6 +21,7 @@
 #include <config.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <stdarg.h>
 #include <string.h>
 #include <assert.h>
 #include <unistd.h>
@@ -29,3 +30,37 @@
 #include "ttyio.h"
 
 
+/****************
+ * Construct a filename form the NULL terminated list of parts.
+ * Tilde expansion is done here.
+ */
+char *
+make_filename( const char *first_part, ... )
+{
+    va_list arg_ptr ;
+    size_t n;
+    const char *s;
+    char *name, *home, *p;
+
+    va_start( arg_ptr, first_part ) ;
+    n = strlen(first_part)+1;
+    while( (s=va_arg(arg_ptr, const char *)) )
+	n += strlen(s) + 1;
+    va_end(arg_ptr);
+
+    home = NULL;
+    if( *first_part == '~' && first_part[1] == '/'
+			   && (home = getenv("HOME")) && *home )
+	n += strlen(home);
+
+    name = m_alloc(n);
+    p = home ? stpcpy(stpcpy(name,home), first_part+1)
+	     : stpcpy(name, first_part);
+    va_start( arg_ptr, first_part ) ;
+    while( (s=va_arg(arg_ptr, const char *)) )
+	p = stpcpy(stpcpy(p,"/"), s);
+    va_end(arg_ptr);
+
+    return name;
+}
+