Fix some issues raised (albeit indirectly) by Isaac Dunham.

POLL_IN defined as a constant by some libc.
Factor out login.c's change_identity() to xwrap.c as xsetuser().
Replace xsetuid() with xsetuser()
Put a space between argument globals and non-argument globals.
TT starts zeroed, don't need to re-zero entries in it.
STDIN_FILENO has been 0 since 1969, even DOS copied that. Just say 0.
Added an xchroot() using xchdir() to lib/xwrap.c.
Remove endgrent() call until somebody can explain why it was there.

1 files changed, 2 insertions, 1 deletions

diff --git a/lib/lib.h b/lib/lib.h
index 3d326499..c46aacaa 100644
--- a/lib/lib.h
+++ b/lib/lib.h
@@ -109,11 +109,12 @@ void xstat(char *path, struct stat *st);
 char *xabspath(char *path, int exact);
 char *xrealpath(char *path);
 void xchdir(char *path);
+void xchroot(char *path);
 void xmkpath(char *path, int mode);
-void xsetuid(uid_t uid);
 struct passwd *xgetpwuid(uid_t uid);
 struct group *xgetgrgid(gid_t gid);
 struct passwd *xgetpwnam(char *name);
+void xsetuser(struct passwd *pwd);
 char *xreadlink(char *name);
 long xparsetime(char *arg, long units, long *fraction);
 void xpidfile(char *name);