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comparison util.c @ 762:206c449eaa81

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Get "portable" builds working on Linux and add a build time check for whether /proc exists
author Michael Pavone <pavone@retrodev.com>
date Sun, 28 Jun 2015 18:44:11 -0700
parents fc68992cf18d
children 2a25ea5d94f7 2f48a3c187c6
comparison
equal deleted inserted replaced
761:ffb8cc5845fa 762:206c449eaa81
136 136
137 char * get_exe_dir() 137 char * get_exe_dir()
138 { 138 {
139 static char * exe_dir; 139 static char * exe_dir;
140 if (!exe_dir) { 140 if (!exe_dir) {
141 char * cur;
142 #ifndef HAS_PROC
141 char * linktext = readlink_alloc("/proc/self/exe"); 143 char * linktext = readlink_alloc("/proc/self/exe");
142 if (!linktext) { 144 if (!linktext) {
143 goto fallback; 145 goto fallback;
144 } 146 }
145 char * cur;
146 int linksize = strlen(linktext); 147 int linksize = strlen(linktext);
147 for(cur = linktext + linksize - 1; cur != linktext; cur--) 148 for(cur = linktext + linksize - 1; cur != linktext; cur--)
148 { 149 {
149 if (*cur == '/') { 150 if (*cur == '/') {
150 *cur = 0; 151 *cur = 0;
152 } 153 }
153 } 154 }
154 if (cur == linktext) { 155 if (cur == linktext) {
155 free(linktext); 156 free(linktext);
156 fallback: 157 fallback:
158 #endif
157 if (!exe_str) { 159 if (!exe_str) {
158 fputs("/proc/self/exe is not available and set_exe_str was not called!", stderr); 160 fputs("/proc/self/exe is not available and set_exe_str was not called!", stderr);
159 } 161 }
160 int pathsize = strlen(exe_str); 162 int pathsize = strlen(exe_str);
161 for(cur = exe_str + pathsize - 1; cur != exe_str; cur--) 163 for(cur = exe_str + pathsize - 1; cur != exe_str; cur--)
165 memcpy(exe_dir, exe_str, cur-exe_str); 167 memcpy(exe_dir, exe_str, cur-exe_str);
166 exe_dir[cur-exe_str] = 0; 168 exe_dir[cur-exe_str] = 0;
167 break; 169 break;
168 } 170 }
169 } 171 }
172 #ifndef HAS_PROC
170 } else { 173 } else {
171 exe_dir = linktext; 174 exe_dir = linktext;
172 } 175 }
176 #endif
173 } 177 }
174 return exe_dir; 178 return exe_dir;
175 } 179 }
176 180
177 #endif 181 #endif