patched nALFS to use /etc/passwd from $LFS

Categories: LFS

The earlier patch for uid:gid failed because You can’t use it to set additional groups which is required because package users use sticky bit of install dirs owned by install group.

So once more I found myself looking at nALFS code. This time I was looking at change group function in stage.c and discovered that it had been modified earlier for use in chroot environment. I knew it when I saw because I was hoping to use the fget.... functions too. Hmm, looks like the team has forgot to change the change_to_user function. I did it and here is the patch. It’s working just fine.

nALFS-1.2.5-change_to_user.patch

 static INLINE int change_to_user(const char *user)
 {
  struct passwd *pw;
+ FILE *fp;

-
- setpwent();
-
- /* getpwnam() is failing in chroot() */
- while ((pw = getpwent())) {
-  if (strcmp(pw->pw_name, user) == 0) {
-   break;
+ if ((fp = fopen("/etc/passwd", "r"))) { //setpwent();
+  /* getpwnam() is failing in chroot() */
+  while ((pw = fgetpwent(fp))) {
+   if (strcmp(pw->pw_name, user) == 0) {
+    break;
+   }
   }
- }

- endpwent();
+  fclose(fp); //endpwent();

+ } else {
+  Nprint_h_warn("Unable to open /etc/passwd: %s",
+   strerror(errno));
+ }
  if (pw == NULL) {
   Nprint_h_err("User %s doesn't exist.", user);
   return -1;