[Bug 2540] New: Adds xstrndup() to xmalloc.h/xmalloc.c in OpenSSH 7.x

[bugzilla-daemon at bugzilla.mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=2540

            Bug ID: 2540
           Summary: Adds xstrndup() to xmalloc.h/xmalloc.c in OpenSSH 7.x
           Product: Portable OpenSSH
           Version: 7.1p1
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P5
         Component: Miscellaneous
          Assignee: unassigned-bugs at mindrot.org
          Reporter: wp02855 at gmail.com

Created attachment 2785
  --> https://bugzilla.mindrot.org/attachment.cgi?id=2785&action=edit
patch file for this bug report

Hello All,

        The code below implements the C function 'strndup()' in
xmalloc.h
and xmalloc.c (for future use, if needed):

--- xmalloc.h.orig      2016-02-13 09:15:50.418982399 -0800
+++ xmalloc.h   2016-02-13 09:16:24.760347010 -0800
@@ -20,6 +20,7 @@
 void   *xcalloc(size_t, size_t);
 void   *xreallocarray(void *, size_t, size_t);
 char   *xstrdup(const char *);
+char   *xstrndup(const char *, size_t);
 int     xasprintf(char **, const char *, ...)
                 __attribute__((__format__ (printf, 2, 3)))
                 __attribute__((__nonnull__ (2)));

=======================================================================

--- xmalloc.c.orig      2016-02-13 09:33:10.108121542 -0800
+++ xmalloc.c   2016-02-13 09:34:07.203378056 -0800
@@ -79,6 +79,20 @@
        return cp;
 }

+char *
+xstrndup(const char *str, size_t dst_size)
+{
+       char *cp;
+       size_t len;
+
+       len = strlen(str) + 1;
+       if (len > size)
+               len = size + 1;
+       cp = xmalloc(len);
+       strlcpy(cp, str, len);
+       return cp;
+}
+
 int
 xasprintf(char **ret, const char *fmt, ...)
 {

 ======================================================================

 I am attaching the patch file(s) to this report...

 Bill Parker (wp02855 at gmail dot com)

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