5 Author: Tatu Ylonen <ylo@cs.hut.fi>
7 Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
10 Created: Wed Jul 12 01:07:36 1995 ylo
20 /* Expands tildes in the file name. Returns data allocated by xmalloc.
21 Warning: this calls getpw*. */
23 char *tilde_expand_filename(const char *filename, uid_t my_uid)
31 /* Return immediately if no tilde. */
32 if (filename[0] != '~')
33 return xstrdup(filename);
38 /* Find where the username ends. */
39 cp = strchr(filename, '/');
41 userlen = cp - filename; /* Have something after username. */
43 userlen = strlen(filename); /* Nothign after username. */
45 pw = getpwuid(my_uid); /* Own home directory. */
48 /* Tilde refers to someone elses home directory. */
49 if (userlen > sizeof(user) - 1)
50 fatal("User name after tilde too long.");
51 memcpy(user, filename, userlen);
56 /* Check that we found the user. */
58 fatal("Unknown user %100s.", user);
60 /* If referring to someones home directory, return it now. */
62 { /* Only home directory specified */
63 return xstrdup(pw->pw_dir);
66 /* Build a path combining the specified directory and path. */
67 expanded = xmalloc(strlen(pw->pw_dir) + strlen(cp + 1) + 2);
68 sprintf(expanded, "%s/%s", pw->pw_dir, cp + 1);