1 | /* -*- c-basic-offset: 8 -*-
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2 | rdesktop: A Remote Desktop Protocol client.
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3 | Generic utility functions
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4 | Copyright 2013 Henrik Andersson <hean01@cendio.se> for Cendio AB
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5 |
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6 | This program is free software: you can redistribute it and/or modify
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7 | it under the terms of the GNU General Public License as published by
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8 | the Free Software Foundation, either version 3 of the License, or
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9 | (at your option) any later version.
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10 |
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11 | This program is distributed in the hope that it will be useful,
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12 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 | GNU General Public License for more details.
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15 |
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16 | You should have received a copy of the GNU General Public License
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17 | along with this program. If not, see <http://www.gnu.org/licenses/>.
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18 | */
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19 |
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20 | /*
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21 | * Oracle GPL Disclaimer: For the avoidance of doubt, except that if any license choice
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22 | * other than GPL or LGPL is available it will apply instead, Oracle elects to use only
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23 | * the General Public License version 2 (GPLv2) at this time for any software where
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24 | * a choice of GPL license versions is made available with the language indicating
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25 | * that GPLv2 or any later version may be used, or where a choice of which version
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26 | * of the GPL is applied is otherwise unspecified.
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27 | */
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28 |
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29 | #include <stdio.h>
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30 | #include <string.h>
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31 | #include <sys/stat.h>
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32 | #include <errno.h>
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33 | #ifdef HAVE_ICONV_H
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34 | #include <iconv.h>
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35 | #endif
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36 | #include "rdesktop.h"
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37 |
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38 |
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39 | #ifdef HAVE_ICONV
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40 | extern char g_codepage[16];
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41 | static RD_BOOL g_iconv_works = True;
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42 | #endif
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43 |
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44 |
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45 |
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46 | char *
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47 | utils_string_escape(const char *str)
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48 | {
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49 | const char *p;
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50 | char *pe, *e, esc[4];
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51 | size_t es;
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52 | int cnt;
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53 |
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54 | /* count indices */
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55 | cnt = 0;
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56 | p = str;
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57 | while (*(p++) != '\0')
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58 | if ((unsigned char) *p < 32 || *p == '%')
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59 | cnt++;
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60 |
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61 | /* if no characters needs escaping return copy of str */
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62 | if (cnt == 0)
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63 | return strdup(str);
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64 |
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65 | /* allocate new mem for result */
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66 | es = strlen(str) + (cnt * 3) + 1;
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67 | pe = e = xmalloc(es);
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68 | memset(e, 0, es);
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69 | p = str;
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70 | while (*p != '\0')
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71 | {
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72 | if ((unsigned char) *p < 32 || *p == '%')
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73 | {
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74 | snprintf(esc, 4, "%%%02X", *p);
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75 | memcpy(pe, esc, 3);
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76 | pe += 3;
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77 | }
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78 | else
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79 | {
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80 | *pe = *p;
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81 | pe++;
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82 | }
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83 |
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84 | p++;
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85 | }
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86 |
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87 | return e;
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88 | }
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89 |
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90 | char *
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91 | utils_string_unescape(const char *str)
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92 | {
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93 | char *ns, *ps, *pd, c;
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94 |
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95 | ns = xmalloc(strlen(str) + 1);
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96 | memcpy(ns, str, strlen(str) + 1);
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97 | ps = pd = ns;
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98 |
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99 | while (*ps != '\0')
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100 | {
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101 | /* check if found escaped character */
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102 | if (ps[0] == '%')
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103 | {
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104 | if (sscanf(ps, "%%%2hhX", &c) == 1)
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105 | {
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106 | pd[0] = c;
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107 | ps += 3;
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108 | pd++;
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109 | continue;
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110 | }
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111 | }
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112 |
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113 | /* just copy over the char */
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114 | *pd = *ps;
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115 | ps++;
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116 | pd++;
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117 | }
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118 | pd[0] = '\0';
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119 |
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120 | return ns;
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121 | }
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122 |
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123 | int
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124 | utils_mkdir_safe(const char *path, int mask)
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125 | {
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126 | int res = 0;
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127 | struct stat st;
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128 |
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129 | res = stat(path, &st);
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130 | if (res == -1)
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131 | return mkdir(path, mask);
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132 |
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133 | if (!S_ISDIR(st.st_mode))
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134 | {
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135 | errno = EEXIST;
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136 | return -1;
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137 | }
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138 |
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139 | return 0;
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140 | }
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141 |
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142 | int
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143 | utils_mkdir_p(const char *path, int mask)
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144 | {
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145 | int res;
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146 | char *ptok;
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147 | char pt[PATH_MAX];
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148 | char bp[PATH_MAX];
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149 |
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150 | if (!path || strlen(path) == 0)
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151 | {
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152 | errno = EINVAL;
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153 | return -1;
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154 | }
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155 | if (strlen(path) > PATH_MAX)
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156 | {
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157 | errno = E2BIG;
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158 | return -1;
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159 | }
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160 |
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161 | res = 0;
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162 | pt[0] = bp[0] = '\0';
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163 | strcpy(bp, path);
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164 |
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165 | ptok = strtok(bp, "/");
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166 | if (ptok == NULL)
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167 | return utils_mkdir_safe(path, mask);
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168 |
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169 | do
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170 | {
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171 | if (ptok != bp)
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172 | strcat(pt, "/");
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173 |
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174 | strcat(pt, ptok);
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175 | res = utils_mkdir_safe(pt, mask);
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176 | if (res != 0)
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177 | return res;
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178 |
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179 | }
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180 | while ((ptok = strtok(NULL, "/")) != NULL);
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181 |
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182 | return 0;
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183 | }
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184 |
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185 | /* Convert from system locale string to utf-8 */
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186 | int
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187 | utils_locale_to_utf8(const char *src, size_t is, char *dest, size_t os)
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188 | {
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189 | #ifdef HAVE_ICONV
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190 | static iconv_t *iconv_h = (iconv_t) - 1;
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191 | if (strncmp(g_codepage, "UTF-8", strlen("UTF-8")) == 0)
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192 | goto pass_trough_as_is;
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193 |
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194 | if (g_iconv_works == False)
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195 | goto pass_trough_as_is;
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196 |
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197 | /* if not already initialize */
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198 | if (iconv_h == (iconv_t) - 1)
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199 | {
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200 | if ((iconv_h = iconv_open("UTF-8", g_codepage)) == (iconv_t) - 1)
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201 | {
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202 | warning("utils_string_to_utf8: iconv_open[%s -> %s] fail %p\n",
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203 | g_codepage, "UTF-8", iconv_h);
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204 |
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205 | g_iconv_works = False;
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206 | goto pass_trough_as_is;
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207 | }
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208 | }
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209 |
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210 | /* convert string */
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211 | if (iconv(iconv_h, (ICONV_CONST char **) &src, &is, &dest, &os) == (size_t) - 1)
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212 | {
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213 | iconv_close(iconv_h);
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214 | iconv_h = (iconv_t) - 1;
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215 | warning("utils_string_to_utf8: iconv(1) fail, errno %d\n", errno);
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216 |
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217 | g_iconv_works = False;
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218 | goto pass_trough_as_is;
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219 | }
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220 |
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221 | /* Out couldn't hold the entire convertion */
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222 | if (is != 0)
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223 | return -1;
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224 |
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225 | #endif
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226 | pass_trough_as_is:
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227 | /* can dest hold strcpy of src */
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228 | if (os < (strlen(src) + 1))
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229 | return -1;
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230 |
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231 | memcpy(dest, src, strlen(src) + 1);
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232 | return 0;
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233 | }
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