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/* This file is part of GDBM, the GNU data base manager.
Copyright (C) 1990-2022 Free Software Foundation, Inc.
GDBM is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GDBM is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GDBM. If not, see <http://www.gnu.org/licenses/>. */
#include "gdbmtool.h"
#include <pwd.h>
char *
mkfilename (const char *dir, const char *file, const char *suf)
{
char *tmp;
size_t dirlen = strlen (dir);
size_t suflen = suf ? strlen (suf) : 0;
size_t fillen = strlen (file);
size_t len;
while (dirlen > 0 && dir[dirlen-1] == '/')
dirlen--;
len = dirlen + (dir[0] ? 1 : 0) + fillen + suflen;
tmp = emalloc (len + 1);
memcpy (tmp, dir, dirlen);
if (dir[0])
tmp[dirlen++] = '/';
memcpy (tmp + dirlen, file, fillen);
if (suf)
memcpy (tmp + dirlen + fillen, suf, suflen);
tmp[len] = 0;
return tmp;
}
char *
tildexpand (char *s)
{
if (s[0] == '~')
{
char *p = s + 1;
size_t len = strcspn (p, "/");
struct passwd *pw;
if (len == 0)
pw = getpwuid (getuid ());
else
{
char *user = emalloc (len + 1);
memcpy (user, p, len);
user[len] = 0;
pw = getpwnam (user);
free (user);
}
if (pw)
return mkfilename (pw->pw_dir, p + len + 1, NULL);
}
return estrdup (s);
}
int
vgetyn (const char *prompt, va_list ap)
{
int state = 0;
int c, resp;
va_list aq;
do
{
switch (state)
{
case 1:
if (c == ' ' || c == '\t')
continue;
resp = c;
state = 2;
/* fall through */
case 2:
if (c == '\n')
{
switch (resp)
{
case 'y':
case 'Y':
return 1;
case 'n':
case 'N':
return 0;
default:
/* TRANSLATORS: Please, don't translate 'y' and 'n'. */
fprintf (stdout, "%s\n", _("Please, reply 'y' or 'n'"));
}
/* fall through */
}
else
break;
case 0:
va_copy (aq, ap);
vfprintf (stdout, prompt, aq);
va_end (aq);
fprintf (stdout, " [y/n]?");
fflush (stdout);
state = 1;
break;
}
} while ((c = getchar ()) != EOF);
exit (EXIT_USAGE);
}
int
getyn (const char *prompt, ...)
{
va_list ap;
int rc;
va_start (ap, prompt);
rc = vgetyn (prompt, ap);
va_end (ap);
return rc;
}
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