Reduce memory requirements for execve()

libc/calls/execve-sysv.c

@@ -25,15 +25,16 @@
 #include "libc/str/str.h"
 
 int execve$sysv(const char *prog, char *const argv[], char *const envp[]) {
-  size_t i, n;
-  char **shargs, bash[PATH_MAX];
+  size_t i;
+  char **shargs;
   if (__execve$sysv(prog, argv, envp) != -1) return 0;
   if (errno != ENOEXEC) return -1;
   for (i = 0; argv[i];) ++i;
   shargs = alloca((i + 2) * sizeof(char *));
   memcpy(shargs + 2, argv + 1, i * sizeof(char *));
   shargs[0] = !IsFreebsd() ? _PATH_BSHELL
-                           : firstnonnull(commandv("bash", bash), _PATH_BSHELL);
+                           : firstnonnull(commandv("bash", alloca(PATH_MAX)),
+                                          _PATH_BSHELL);
   shargs[1] = prog;
   return __execve$sysv(shargs[0], shargs, envp);
 }