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utils.c
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utils.c
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/* -*- c-basic-offset: 8 -*-
rdesktop: A Remote Desktop Protocol client.
Generic utility functions
Copyright 2013 Henrik Andersson <[email protected]> for Cendio AB
This program 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 of the License, or
(at your option) any later version.
This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <errno.h>
#ifdef HAVE_ICONV_H
#include <iconv.h>
#endif
#include "rdesktop.h"
#ifdef HAVE_ICONV
extern char g_codepage[16];
static RD_BOOL g_iconv_works = True;
#endif
char *
utils_string_escape(const char *str)
{
const char *p;
char *pe, *e, esc[4];
size_t es;
int cnt;
/* count indices */
cnt = 0;
p = str;
while (*(p++) != '\0')
if ((unsigned char) *p < 32 || *p == '%')
cnt++;
/* if no characters needs escaping return copy of str */
if (cnt == 0)
return strdup(str);
/* allocate new mem for result */
es = strlen(str) + (cnt * 3) + 1;
pe = e = xmalloc(es);
memset(e, 0, es);
p = str;
while (*p != '\0')
{
if ((unsigned char) *p < 32 || *p == '%')
{
snprintf(esc, 4, "%%%02X", *p);
memcpy(pe, esc, 3);
pe += 3;
}
else
{
*pe = *p;
pe++;
}
p++;
}
return e;
}
char *
utils_string_unescape(const char *str)
{
char *ns, *ps, *pd, c;
ns = xmalloc(strlen(str) + 1);
memcpy(ns, str, strlen(str) + 1);
ps = pd = ns;
while (*ps != '\0')
{
/* check if found escaped character */
if (ps[0] == '%')
{
if (sscanf(ps, "%%%2hhX", &c) == 1)
{
pd[0] = c;
ps += 3;
pd++;
continue;
}
}
/* just copy over the char */
*pd = *ps;
ps++;
pd++;
}
pd[0] = '\0';
return ns;
}
int
utils_mkdir_safe(const char *path, int mask)
{
int res = 0;
struct stat st;
res = stat(path, &st);
if (res == -1)
return mkdir(path, mask);
if (!S_ISDIR(st.st_mode))
{
errno = EEXIST;
return -1;
}
return 0;
}
int
utils_mkdir_p(const char *path, int mask)
{
int res;
char *ptok;
char pt[PATH_MAX];
char bp[PATH_MAX];
if (!path || strlen(path) == 0)
{
errno = EINVAL;
return -1;
}
if (strlen(path) > PATH_MAX)
{
errno = E2BIG;
return -1;
}
res = 0;
pt[0] = bp[0] = '\0';
strcpy(bp, path);
ptok = strtok(bp, "/");
if (ptok == NULL)
return utils_mkdir_safe(path, mask);
do
{
if (ptok != bp)
strcat(pt, "/");
strcat(pt, ptok);
res = utils_mkdir_safe(pt, mask);
if (res != 0)
return res;
}
while ((ptok = strtok(NULL, "/")) != NULL);
return 0;
}
/* Convert from system locale string to utf-8 */
int
utils_locale_to_utf8(const char *src, size_t is, char *dest, size_t os)
{
#ifdef HAVE_ICONV
static iconv_t *iconv_h = (iconv_t) - 1;
if (strncmp(g_codepage, "UTF-8", strlen("UTF-8")) == 0)
goto pass_trough_as_is;
if (g_iconv_works == False)
goto pass_trough_as_is;
/* if not already initialize */
if (iconv_h == (iconv_t) - 1)
{
if ((iconv_h = iconv_open("UTF-8", g_codepage)) == (iconv_t) - 1)
{
warning("utils_string_to_utf8: iconv_open[%s -> %s] fail %p\n",
g_codepage, "UTF-8", iconv_h);
g_iconv_works = False;
goto pass_trough_as_is;
}
}
/* convert string */
if (iconv(iconv_h, (ICONV_CONST char **) &src, &is, &dest, &os) == (size_t) - 1)
{
iconv_close(iconv_h);
iconv_h = (iconv_t) - 1;
warning("utils_string_to_utf8: iconv(1) fail, errno %d\n", errno);
g_iconv_works = False;
goto pass_trough_as_is;
}
/* Out couldn't hold the entire convertion */
if (is != 0)
return -1;
#endif
pass_trough_as_is:
/* can dest hold strcpy of src */
if (os < (strlen(src) + 1))
return -1;
memcpy(dest, src, strlen(src) + 1);
return 0;
}