win32: support .com executables

2 files changed, 17 insertions, 5 deletions

diff --git a/libbb/execable.c b/libbb/execable.c
index 96ce9bfb8..06b1c534b 100644
--- a/libbb/execable.c
+++ b/libbb/execable.c
@@ -18,8 +18,11 @@ 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 len > 4 &&
+                        (!strcasecmp(name+len-4, ".exe") ||
+                         !strcasecmp(name+len-4, ".com")) &&
+                        !stat(name, &s) &&
+                        S_ISREG(s.st_mode);
         }
         return (!access(name, X_OK) && !stat(name, &s) && S_ISREG(s.st_mode));
 }
@@ -43,7 +46,7 @@ char* FAST_FUNC find_execable(const char *filename, char **PATHp)
 
         p = *PATHp;
         while (p) {
-                n = next_path_sep(p);
+                n = (char*)next_path_sep(p);
                 if (n)
                         *n++ = '\0';
                 if (*p != '\0') { /* it's not a PATH="foo::bar" situation */
@@ -54,7 +57,9 @@ char* FAST_FUNC find_execable(const char *filename, char **PATHp)
                         }
                         if (ENABLE_PLATFORM_MINGW32) {
                                 int len = strlen(p);
-                                if (len > 4 && !strcasecmp(p+len-4, ".exe"))
+                                if (len > 4 &&
+                                    (!strcasecmp(p+len-4, ".exe") ||
+                                     !strcasecmp(p+len-4, ".com")))
                                         ; /* nothing, already tested by find_execable() */
                                 else {
                                         char *np = xmalloc(len+4+1);
@@ -64,6 +69,11 @@ char* FAST_FUNC find_execable(const char *filename, char **PATHp)
                                                 *PATHp = n;
                                                 return np;
                                         }
+                                        memcpy(np+len, ".com", 5);
+                                        if (execable_file(np)) {
+                                                *PATHp = n;
+                                                return np;
+                                        }
                                 }
                         }
                         free(p);
diff --git a/win32/process.c b/win32/process.c
index 0936e1c42..13bf81797 100644
--- a/win32/process.c
+++ b/win32/process.c
@@ -38,7 +38,9 @@ parse_interpreter(const char *cmd)
 
         /* don't even try a .exe */
         n = strlen(cmd);
-        if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
+        if (n >= 4 &&
+            (!strcasecmp(cmd+n-4, ".exe") ||
+             !strcasecmp(cmd+n-4, ".com")))
                 return NULL;
 
         fd = open(cmd, O_RDONLY);