/* 
 * We paper over, rather than fix, include-file bugs; this is a
 *  very-early-use program on new machines.
 */
#include <pwd.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <strings.h>
#include <sys/stat.h>

static void try(const char *path, char **av)
{
 struct stat stb;
 char *osv0;
 const char *l;
 const char *pref;
 char *t;

 if ( (stat(path,&stb) >= 0) &&
      ((stb.st_mode & S_IFMT) != S_IFLNK) &&
      (access(path,X_OK) >= 0) )
  { pref = (av[0][0] == '-') ? "-" : "";
    l = rindex(path,'/');
    if (l)
     { asprintf(&t,"%s%s",pref,l+1);
     }
    else
     { asprintf(&t,"%s%s",pref,path);
     }
    osv0 = av[0];
    av[0] = t;
    execv(path,av);
    av[0] = osv0;
    free(t);
  }
}

int main(int, char **);
int main(int ac, char **av)
{
 struct passwd *pw;
 char *d;
 char *sp;

 (void)ac;
 pw = getpwnam("mouse");
 d = strdup(pw?pw->pw_dir:"/home/mouse");
 asprintf(&sp,"%s/lbin/mcsh",d);
 try(sp,av);
 free(sp);
 try("/bin/bash",av);
 try("/bin/sh",av);
 write(2,av[0],strlen(av[0]));
 write(2,": can't find a shell to use\n",28);
 exit(1);
}