1 files changed, 72 insertions, 0 deletions

diff --git a/other/ssharp/tildexpand.c b/other/ssharp/tildexpand.c
new file mode 100644
index 0000000..46bdaae
--- /dev/null
+++ b/other/ssharp/tildexpand.c
@@ -0,0 +1,72 @@
+/*
+ * Author: Tatu Ylonen <ylo@cs.hut.fi>
+ * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
+ *                    All rights reserved
+ *
+ * As far as I am concerned, the code I have written for this software
+ * can be used freely for any purpose.  Any derived versions of this
+ * software must be clearly marked as such, and if the derived work is
+ * incompatible with the protocol description in the RFC file, it must be
+ * called by a name other than "ssh" or "Secure Shell".
+ */
+
+#include "includes.h"
+RCSID("$OpenBSD: tildexpand.c,v 1.11 2001/02/08 19:30:53 itojun Exp $");
+
+#include "xmalloc.h"
+#include "log.h"
+#include "tildexpand.h"
+
+/*
+ * Expands tildes in the file name.  Returns data allocated by xmalloc.
+ * Warning: this calls getpw*.
+ */
+char *
+tilde_expand_filename(const char *filename, uid_t my_uid)
+{
+        const char *cp;
+        u_int userlen;
+        char *expanded;
+        struct passwd *pw;
+        char user[100];
+        int len;
+
+        /* Return immediately if no tilde. */
+        if (filename[0] != '~')
+                return xstrdup(filename);
+
+        /* Skip the tilde. */
+        filename++;
+
+        /* Find where the username ends. */
+        cp = strchr(filename, '/');
+        if (cp)
+                userlen = cp - filename;        /* Something after username. */
+        else
+                userlen = strlen(filename);     /* Nothing after username. */
+        if (userlen == 0)
+                pw = getpwuid(my_uid);          /* Own home directory. */
+        else {
+                /* Tilde refers to someone elses home directory. */
+                if (userlen > sizeof(user) - 1)
+                        fatal("User name after tilde too long.");
+                memcpy(user, filename, userlen);
+                user[userlen] = 0;
+                pw = getpwnam(user);
+        }
+        if (!pw)
+                fatal("Unknown user %100s.", user);
+
+        /* If referring to someones home directory, return it now. */
+        if (!cp) {
+                /* Only home directory specified */
+                return xstrdup(pw->pw_dir);
+        }
+        /* Build a path combining the specified directory and path. */
+        len = strlen(pw->pw_dir) + strlen(cp + 1) + 2;
+        if (len > MAXPATHLEN)
+                fatal("Home directory too long (%d > %d", len-1, MAXPATHLEN-1);
+        expanded = xmalloc(len);
+        snprintf(expanded, len, "%s/%s", pw->pw_dir, cp + 1);
+        return expanded;
+}