win32: execable.c: support .exe suffix

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>

1 files changed, 25 insertions, 1 deletions

diff --git a/libbb/execable.c b/libbb/execable.c
index 5c7ac16a2..b2ec16713 100644
--- a/libbb/execable.c
+++ b/libbb/execable.c
@@ -16,6 +16,11 @@
 int FAST_FUNC execable_file(const char *name)
 {
         struct stat s;
+        if (ENABLE_PLATFORM_MINGW32) {
+                int len = strlen(name);
+                return len >= 4 && !strcasecmp(name+len-4, ".exe") &&
+                        !stat(name, &s) && S_ISREG(s.st_mode);
+        }
         return (!access(name, X_OK) && !stat(name, &s) && S_ISREG(s.st_mode));
 }
 
@@ -28,13 +33,17 @@ int FAST_FUNC execable_file(const char *name)
  * return NULL otherwise; (PATHp is undefined)
  * in all cases (*PATHp) contents will be trashed (s/:/NUL/).
  */
+#if !ENABLE_PLATFORM_MINGW32
+#define next_path_sep(s) strchr(s, ':')
+#endif
+
 char* FAST_FUNC find_execable(const char *filename, char **PATHp)
 {
         char *p, *n;
 
         p = *PATHp;
         while (p) {
-                n = strchr(p, ':');
+                n = next_path_sep(p);
                 if (n)
                         *n++ = '\0';
                 if (*p != '\0') { /* it's not a PATH="foo::bar" situation */
@@ -43,6 +52,21 @@ char* FAST_FUNC find_execable(const char *filename, char **PATHp)
                                 *PATHp = n;
                                 return p;
                         }
+                        if (ENABLE_PLATFORM_MINGW32) {
+                                int len = strlen(p);
+                                if (len > 4 && !strcasecmp(p+len-4, ".exe"))
+                                        ; /* nothing, already tested by find_execable() */
+                                else {
+                                        char *np = xmalloc(len+4+1);
+                                        memcpy(np, p, len);
+                                        memcpy(np+len, ".exe", 4);
+                                        np[len+4] = '0';
+                                        if (execable_file(np)) {
+                                                *PATHp = n;
+                                                return np;
+                                        }
+                                }
+                        }
                         free(p);
                 }
                 p = n;