lib/, src/: Remove all code wrapped in defined(USE_NIS)

I don't find any way to enable USE_NIS, so it looks like it's all
dead code.  Bury it.

Closes: <https://github.com/shadow-maint/shadow/issues/909>
Signed-off-by: Alejandro Colomar <alx@kernel.org>

10 files changed, 1 insertions, 581 deletions

diff --git a/lib/gshadow.c b/lib/gshadow.c
index 923f4683..8be79e81 100644
--- a/lib/gshadow.c
+++ b/lib/gshadow.c
@@ -30,34 +30,6 @@ static struct sgrp sgroup;
 
 #define	FIELDS	4
 
-#ifdef	USE_NIS
-static bool nis_used;
-static bool nis_ignore;
-static enum { native, start, middle, native2 } nis_state;
-static bool nis_bound;
-static char *nis_domain;
-static char *nis_key;
-static int nis_keylen;
-static char *nis_val;
-static int nis_vallen;
-
-#define	IS_NISCHAR(c) ((c)=='+')
-#endif
-
-#ifdef	USE_NIS
-/*
- * bind_nis - bind to NIS server
- */
-
-static int bind_nis (void)
-{
-	if (yp_get_default_domain (&nis_domain))
-		return -1;
-
-	nis_bound = true;
-	return 0;
-}
-#endif
 
 static /*@null@*/char **build_list (char *s, char **list[], size_t * nlist)
 {
@@ -90,9 +62,6 @@ static /*@null@*/char **build_list (char *s, char **list[], size_t * nlist)
 
 void setsgent (void)
 {
-#ifdef	USE_NIS
-	nis_state = native;
-#endif
 	if (NULL != shadow) {
 		rewind (shadow);
 	} else {
@@ -154,15 +123,7 @@ void endsgent (void)
 	 */
 
 	if ((NULL != cp) || (i != FIELDS)) {
-#ifdef	USE_NIS
-		if (!IS_NISCHAR (fields[0][0])) {
-			return 0;
-		} else {
-			nis_used = true;
-		}
-#else
 		return 0;
-#endif
 	}
 
 	sgroup.sg_name = fields[0];
@@ -209,11 +170,7 @@ void endsgent (void)
 		return NULL;
 	}
 
-#ifdef	USE_NIS
-	while (fgetsx (buf, buflen, fp) == buf)
-#else
 	if (fgetsx (buf, buflen, fp) == buf)
-#endif
 	{
 		while (   ((cp = strrchr (buf, '\n')) == NULL)
 		       && (feof (fp) == 0)) {
@@ -237,11 +194,6 @@ void endsgent (void)
 		if (NULL != cp) {
 			*cp = '\0';
 		}
-#ifdef	USE_NIS
-		if (nis_ignore && IS_NISCHAR (buf[0])) {
-			continue;
-		}
-#endif
 		return (sgetsgent (buf));
 	}
 	return NULL;
@@ -253,96 +205,10 @@ void endsgent (void)
 
 /*@observer@*//*@null@*/struct sgrp *getsgent (void)
 {
-#ifdef	USE_NIS
-	bool nis_1_group = false;
-	struct sgrp *val;
-#endif
 	if (NULL == shadow) {
 		setsgent ();
 	}
-
-#ifdef	USE_NIS
-      again:
-	/*
-	 * See if we are reading from the local file.
-	 */
-
-	if (nis_state == native || nis_state == native2) {
-
-		/*
-		 * Get the next entry from the shadow group file.  Return
-		 * NULL right away if there is none.
-		 */
-
-		val = fgetsgent (shadow);
-		if (NULL == val) {
-			return 0;
-		}
-
-		/*
-		 * If this entry began with a NIS escape character, we have
-		 * to see if this is just a single group, or if the entire
-		 * map is being asked for.
-		 */
-
-		if (IS_NISCHAR (val->sg_name[0])) {
-			if ('\0' != val->sg_name[1]) {
-				nis_1_group = true;
-			} else {
-				nis_state = start;
-			}
-		}
-
-		/*
-		 * If this isn't a NIS group and this isn't an escape to go
-		 * use a NIS map, it must be a regular local group.
-		 */
-
-		if (!nis_1_group && (nis_state != start)) {
-			return val;
-		}
-
-		/*
-		 * If this is an escape to use an NIS map, switch over to
-		 * that bunch of code.
-		 */
-
-		if (nis_state == start) {
-			goto again;
-		}
-
-		/*
-		 * NEEDSWORK.  Here we substitute pieces-parts of this entry.
-		 */
-
-		return 0;
-	} else {
-		if (!nis_bound) {
-			if (bind_nis ()) {
-				nis_state = native2;
-				goto again;
-			}
-		}
-		if (nis_state == start) {
-			if (yp_first (nis_domain, "gshadow.byname", &nis_key,
-				      &nis_keylen, &nis_val, &nis_vallen)) {
-				nis_state = native2;
-				goto again;
-			}
-			nis_state = middle;
-		} else if (nis_state == middle) {
-			if (yp_next (nis_domain, "gshadow.byname", nis_key,
-				     nis_keylen, &nis_key, &nis_keylen,
-				     &nis_val, &nis_vallen)) {
-				nis_state = native2;
-				goto again;
-			}
-		}
-		return sgetsgent (nis_val);
-	}
-#else
 	return (fgetsgent (shadow));
-#endif
 }
 
 /*
@@ -353,63 +219,13 @@ void endsgent (void)
 {
 	struct sgrp *sgrp;
 
-#ifdef	USE_NIS
-	static char save_name[16];
-	int nis_disabled = 0;
-#endif
-
 	setsgent ();
 
-#ifdef	USE_NIS
-	if (nis_used) {
-	      again:
-
-		/*
-		 * Search the gshadow.byname map for this group.
-		 */
-
-		if (!nis_bound) {
-			bind_nis ();
-		}
-
-		if (nis_bound) {
-			char *cp;
-
-			if (yp_match (nis_domain, "gshadow.byname", name,
-				      strlen (name), &nis_val,
-				      &nis_vallen) == 0) {
-				cp = strchr (nis_val, '\n');
-				if (NULL != cp) {
-					*cp = '\0';
-				}
-
-				nis_state = middle;
-				sgrp = sgetsgent (nis_val);
-				if (NULL != sgrp) {
-					strcpy (save_name, sgrp->sg_name);
-					nis_key = save_name;
-					nis_keylen = strlen (save_name);
-				}
-				return sgrp;
-			}
-		}
-		nis_state = native2;
-	}
-#endif
-#ifdef	USE_NIS
-	if (nis_used) {
-		nis_ignore = true;
-		nis_disabled = true;
-	}
-#endif
 	while ((sgrp = getsgent ()) != NULL) {
 		if (strcmp (name, sgrp->sg_name) == 0) {
 			break;
 		}
 	}
-#ifdef	USE_NIS
-	nis_ignore = false;
-#endif
 	return sgrp;
 }
 
diff --git a/lib/prefix_flag.c b/lib/prefix_flag.c
index 8360a4ab..d42657d5 100644
--- a/lib/prefix_flag.c
+++ b/lib/prefix_flag.c
@@ -117,9 +117,6 @@ extern const char* process_prefix_flag (const char* short_opt, int argc, char **
 		xasprintf(&sgroup_db_file, "%s/%s", prefix, SGROUP_FILE);
 		sgr_setdbname(sgroup_db_file);
 #endif
-#ifdef	USE_NIS
-		__setspNIS(0); /* disable NIS for now, at least until it is properly supporting a "prefix" */
-#endif
 
 		xasprintf(&spw_db_file, "%s/%s", prefix, SHADOW_FILE);
 		spw_setdbname(spw_db_file);
diff --git a/lib/shadow.c b/lib/shadow.c
index dac14071..34da3988 100644
--- a/lib/shadow.c
+++ b/lib/shadow.c
@@ -18,54 +18,13 @@
 #include "prototypes.h"
 #include "defines.h"
 #include <stdio.h>
-#ifdef	USE_NIS
-static bool nis_used;
-static bool nis_ignore;
-static enum { native, start, middle, native2 } nis_state;
-static bool nis_bound;
-static char *nis_domain;
-static char *nis_key;
-static int nis_keylen;
-static char *nis_val;
-static int nis_vallen;
-
-#define	IS_NISCHAR(c) ((c)=='+')
-#endif
+
 
 static FILE *shadow;
 
 #define	FIELDS	9
 #define	OFIELDS	5
 
-#ifdef	USE_NIS
-
-/*
- * __setspNIS - turn on or off NIS searches
- */
-
-void __setspNIS (bool flag)
-{
-	nis_ignore = !flag;
-
-	if (nis_ignore) {
-		nis_used = false;
-	}
-}
-
-/*
- * bind_nis - bind to NIS server
- */
-
-static int bind_nis (void)
-{
-	if (yp_get_default_domain (&nis_domain)) {
-		return -1;
-	}
-
-	nis_bound = true;
-	return 0;
-}
-#endif
 
 /*
  * setspent - initialize access to shadow text and DBM files
@@ -78,10 +37,6 @@ void setspent (void)
 	}else {
 		shadow = fopen (SHADOW_FILE, "r");
 	}
-
-#ifdef	USE_NIS
-	nis_state = native;
-#endif
 }
 
 /*
@@ -150,11 +105,6 @@ static struct spwd *my_sgetspent (const char *string)
 	 */
 
 	spwd.sp_namp = fields[0];
-#ifdef	USE_NIS
-	if (IS_NISCHAR (fields[0][0])) {
-		nis_used = true;
-	}
-#endif
 	spwd.sp_pwdp = fields[1];
 
 	/*
@@ -167,11 +117,6 @@ static struct spwd *my_sgetspent (const char *string)
 		spwd.sp_lstchg = -1;
 	} else {
 		if (getlong(fields[2], &spwd.sp_lstchg) == -1) {
-#ifdef	USE_NIS
-			if (nis_used) {
-				spwd.sp_lstchg = -1;
-			} else
-#endif
 				return 0;
 		} else if (spwd.sp_lstchg < 0) {
 			return 0;
@@ -186,11 +131,6 @@ static struct spwd *my_sgetspent (const char *string)
 		spwd.sp_min = -1;
 	} else {
 		if (getlong(fields[3], &spwd.sp_min) == -1) {
-#ifdef	USE_NIS
-			if (nis_used) {
-				spwd.sp_min = -1;
-			} else
-#endif
 			{
 				return 0;
 			}
@@ -207,11 +147,6 @@ static struct spwd *my_sgetspent (const char *string)
 		spwd.sp_max = -1;
 	} else {
 		if (getlong(fields[4], &spwd.sp_max) == -1) {
-#ifdef	USE_NIS
-			if (nis_used) {
-				spwd.sp_max = -1;
-			} else
-#endif
 				return 0;
 		} else if (spwd.sp_max < 0) {
 			return 0;
@@ -240,11 +175,6 @@ static struct spwd *my_sgetspent (const char *string)
 		spwd.sp_warn = -1;
 	} else {
 		if (getlong(fields[5], &spwd.sp_warn) == -1) {
-#ifdef	USE_NIS
-			if (nis_used) {
-				spwd.sp_warn = -1;
-			} else
-#endif
 			{
 				return 0;
 			}
@@ -262,11 +192,6 @@ static struct spwd *my_sgetspent (const char *string)
 		spwd.sp_inact = -1;
 	} else {
 		if (getlong(fields[6], &spwd.sp_inact) == -1) {
-#ifdef	USE_NIS
-			if (nis_used) {
-				spwd.sp_inact = -1;
-			} else
-#endif
 			{
 				return 0;
 			}
@@ -284,11 +209,6 @@ static struct spwd *my_sgetspent (const char *string)
 		spwd.sp_expire = -1;
 	} else {
 		if (getlong(fields[7], &spwd.sp_expire) == -1) {
-#ifdef	USE_NIS
-			if (nis_used) {
-				spwd.sp_expire = -1;
-			} else
-#endif
 			{
 				return 0;
 			}
@@ -306,11 +226,6 @@ static struct spwd *my_sgetspent (const char *string)
 		spwd.sp_flag = SHADOW_SP_FLAG_UNSET;
 	} else {
 		if (getulong(fields[8], &spwd.sp_flag) == -1) {
-#ifdef	USE_NIS
-			if (nis_used) {
-				spwd.sp_flag = SHADOW_SP_FLAG_UNSET;
-			} else
-#endif
 			{
 				return 0;
 			}
@@ -335,21 +250,12 @@ struct spwd *fgetspent (FILE * fp)
 		return (0);
 	}
 
-#ifdef	USE_NIS
-	while (fgets (buf, sizeof buf, fp) != NULL)
-#else
 	if (fgets (buf, sizeof buf, fp) != NULL)
-#endif
 	{
 		cp = strchr (buf, '\n');
 		if (NULL != cp) {
 			*cp = '\0';
 		}
-#ifdef	USE_NIS
-		if (nis_ignore && IS_NISCHAR (buf[0])) {
-			continue;
-		}
-#endif
 		return my_sgetspent (buf);
 	}
 	return 0;
@@ -361,92 +267,10 @@ struct spwd *fgetspent (FILE * fp)
 
 struct spwd *getspent (void)
 {
-#ifdef	USE_NIS
-	int nis_1_user = 0;
-	struct spwd *val;
-#endif
 	if (NULL == shadow) {
 		setspent ();
 	}
-
-#ifdef	USE_NIS
-      again:
-	/*
-	 * See if we are reading from the local file.
-	 */
-
-	if (nis_state == native || nis_state == native2) {
-
-		/*
-		 * Get the next entry from the shadow file.  Return NULL
-		 * right away if there is none.
-		 */
-
-		val = fgetspent (shadow);
-		if (NULL == val)
-			return 0;
-
-		/*
-		 * If this entry began with a NIS escape character, we have
-		 * to see if this is just a single user, or if the entire
-		 * map is being asked for.
-		 */
-
-		if (IS_NISCHAR (val->sp_namp[0])) {
-			if (val->sp_namp[1])
-				nis_1_user = 1;
-			else
-				nis_state = start;
-		}
-
-		/*
-		 * If this isn't a NIS user and this isn't an escape to go
-		 * use a NIS map, it must be a regular local user.
-		 */
-
-		if (nis_1_user == 0 && nis_state != start)
-			return val;
-
-		/*
-		 * If this is an escape to use an NIS map, switch over to
-		 * that bunch of code.
-		 */
-
-		if (nis_state == start)
-			goto again;
-
-		/*
-		 * NEEDSWORK.  Here we substitute pieces-parts of this entry.
-		 */
-
-		return 0;
-	} else {
-		if (!nis_bound) {
-			if (bind_nis ()) {
-				nis_state = native2;
-				goto again;
-			}
-		}
-		if (nis_state == start) {
-			if (yp_first (nis_domain, "shadow.bynam", &nis_key,
-			              &nis_keylen, &nis_val, &nis_vallen)) {
-				nis_state = native2;
-				goto again;
-			}
-			nis_state = middle;
-		} else if (nis_state == middle) {
-			if (yp_next (nis_domain, "shadow.bynam", nis_key,
-			             nis_keylen, &nis_key, &nis_keylen,
-			             &nis_val, &nis_vallen)) {
-				nis_state = native2;
-				goto again;
-			}
-		}
-		return my_sgetspent (nis_val);
-	}
-#else
 	return (fgetspent (shadow));
-#endif
 }
 
 /*
@@ -457,74 +281,16 @@ struct spwd *getspnam (const char *name)
 {
 	struct spwd *sp;
 
-#ifdef	USE_NIS
-	static char save_name[16];
-	bool nis_disabled = false;
-#endif
-
 	setspent ();
 
-#ifdef	USE_NIS
-	/*
-	 * Search the shadow.byname map for this user.
-	 */
-
-	if (!nis_ignore && !nis_bound) {
-		bind_nis ();
-	}
-
-	if (!nis_ignore && nis_bound) {
-		char *cp;
-
-		if (yp_match (nis_domain, "shadow.byname", name,
-		              strlen (name), &nis_val, &nis_vallen) == 0) {
-
-			cp = strchr (nis_val, '\n');
-			if (NULL != cp) {
-				*cp = '\0';
-			}
-
-			nis_state = middle;
-			sp = my_sgetspent (nis_val);
-			if (NULL != sp) {
-				strcpy (save_name, sp->sp_namp);
-				nis_key = save_name;
-				nis_keylen = strlen (save_name);
-			}
-			endspent ();
-			return sp;
-		} else {
-			nis_state = native2;
-		}
-	}
-#endif
-#ifdef	USE_NIS
-	/*
-	 * NEEDSWORK -- this is a mess, and it is the same mess in the
-	 * other three files.  I can't just blindly turn off NIS because
-	 * this might be the first pass through the local files.  In
-	 * that case, I never discover that NIS is present.
-	 */
-
-	if (nis_used) {
-		nis_ignore = true;
-		nis_disabled = true;
-	}
-#endif
 	while ((sp = getspent ()) != NULL) {
 		if (strcmp (name, sp->sp_namp) == 0) {
 			break;
 		}
 	}
-#ifdef	USE_NIS
-	if (nis_disabled) {
-		nis_ignore = false;
-	}
-#endif
 	endspent ();
 	return (sp);
 }
 #else
 extern int ISO_C_forbids_an_empty_translation_unit;
 #endif
-
diff --git a/src/chfn.c b/src/chfn.c
index 0877ab7e..9043212a 100644
--- a/src/chfn.c
+++ b/src/chfn.c
@@ -668,29 +668,6 @@ int main (int argc, char **argv)
 		user = xstrdup (pw->pw_name);
 	}
 
-#ifdef	USE_NIS
-	/*
-	 * Now we make sure this is a LOCAL password entry for this user ...
-	 */
-	if (__ispwNIS ()) {
-		char *nis_domain;
-		char *nis_master;
-
-		fprintf (stderr,
-		         _("%s: cannot change user '%s' on NIS client.\n"),
-		         Prog, user);
-
-		if (!yp_get_default_domain (&nis_domain) &&
-		    !yp_master (nis_domain, "passwd.byname", &nis_master)) {
-			fprintf (stderr,
-			         _
-			         ("%s: '%s' is the NIS master for this client.\n"),
-			         Prog, nis_master);
-		}
-		fail_exit (E_NOPERM);
-	}
-#endif
-
 	/* Check that the caller is allowed to change the gecos of the
 	 * specified user */
 	check_perms (pw);
diff --git a/src/chsh.c b/src/chsh.c
index 9be52e3d..c4918c1b 100644
--- a/src/chsh.c
+++ b/src/chsh.c
@@ -518,28 +518,6 @@ int main (int argc, char **argv)
 		user = xstrdup (pw->pw_name);
 	}
 
-#ifdef	USE_NIS
-	/*
-	 * Now we make sure this is a LOCAL password entry for this user ...
-	 */
-	if (__ispwNIS ()) {
-		char *nis_domain;
-		char *nis_master;
-
-		fprintf (stderr,
-		         _("%s: cannot change user '%s' on NIS client.\n"),
-		         Prog, user);
-
-		if (!yp_get_default_domain (&nis_domain) &&
-		    !yp_master (nis_domain, "passwd.byname", &nis_master)) {
-			fprintf (stderr,
-			         _("%s: '%s' is the NIS master for this client.\n"),
-			         Prog, nis_master);
-		}
-		fail_exit (1);
-	}
-#endif
-
 	check_perms (pw);
 
 	/*
diff --git a/src/groupdel.c b/src/groupdel.c
index 3e3905fb..4bc58aa9 100644
--- a/src/groupdel.c
+++ b/src/groupdel.c
@@ -429,28 +429,6 @@ int main (int argc, char **argv)
 		group_id = grp->gr_gid;
 	}
 
-#ifdef	USE_NIS
-	/*
-	 * Make sure this isn't a NIS group
-	 */
-	if (__isgrNIS ()) {
-		char *nis_domain;
-		char *nis_master;
-
-		fprintf (stderr,
-		         _("%s: group '%s' is a NIS group\n"),
-		         Prog, group_name);
-
-		if (!yp_get_default_domain (&nis_domain) &&
-		    !yp_master (nis_domain, "group.byname", &nis_master)) {
-			fprintf (stderr,
-			         _("%s: %s is the NIS master\n"),
-			         Prog, nis_master);
-		}
-		exit (E_NOTFOUND);
-	}
-#endif
-
 	/*
 	 * Make sure this isn't the primary group of anyone.
 	 */
diff --git a/src/groupmod.c b/src/groupmod.c
index 21d48368..a29cf73f 100644
--- a/src/groupmod.c
+++ b/src/groupmod.c
@@ -830,28 +830,6 @@ int main (int argc, char **argv)
 		}
 	}
 
-#ifdef	USE_NIS
-	/*
-	 * Now make sure it isn't an NIS group.
-	 */
-	if (__isgrNIS ()) {
-		char *nis_domain;
-		char *nis_master;
-
-		fprintf (stderr,
-		         _("%s: group %s is a NIS group\n"),
-		         Prog, group_name);
-
-		if (!yp_get_default_domain (&nis_domain) &&
-		    !yp_master (nis_domain, "group.byname", &nis_master)) {
-			fprintf (stderr,
-			         _("%s: %s is the NIS master\n"),
-			         Prog, nis_master);
-		}
-		exit (E_NOTFOUND);
-	}
-#endif
-
 	if (gflg) {
 		check_new_gid ();
 	}
diff --git a/src/useradd.c b/src/useradd.c
index 4ea6740f..15e4f160 100644
--- a/src/useradd.c
+++ b/src/useradd.c
@@ -817,20 +817,6 @@ static int get_groups (char *list)
 			continue;
 		}
 
-#ifdef	USE_NIS
-		/*
-		 * Don't add this group if they are an NIS group. Tell
-		 * the user to go to the server for this group.
-		 */
-		if (__isgrNIS ()) {
-			fprintf (stderr,
-			         _("%s: group '%s' is a NIS group.\n"),
-			         Prog, grp->gr_name);
-			gr_free(grp);
-			continue;
-		}
-#endif
-
 		if (ngroups == sys_ngroups) {
 			fprintf (stderr,
 			         _("%s: too many groups specified (max %d).\n"),
diff --git a/src/userdel.c b/src/userdel.c
index 395640c2..ff1f7ddf 100644
--- a/src/userdel.c
+++ b/src/userdel.c
@@ -1125,26 +1125,6 @@ int main (int argc, char **argv)
 		exit (E_NOTFOUND);
 	}
 #endif				/* WITH_TCB */
-#ifdef	USE_NIS
-
-	/*
-	 * Now make sure it isn't an NIS user.
-	 */
-	if (__ispwNIS ()) {
-		char *nis_domain;
-		char *nis_master;
-
-		fprintf (stderr,
-		         _("%s: user %s is a NIS user\n"), Prog, user_name);
-		if (   !yp_get_default_domain (&nis_domain)
-		    && !yp_master (nis_domain, "passwd.byname", &nis_master)) {
-			fprintf (stderr,
-			         _("%s: %s is the NIS master\n"),
-			         Prog, nis_master);
-		}
-		exit (E_NOTFOUND);
-	}
-#endif				/* USE_NIS */
 	/*
 	 * Check to make certain the user isn't logged in.
 	 * Note: This is a best effort basis. The user may log in between,
diff --git a/src/usermod.c b/src/usermod.c
index 2aa8f36e..7f0393b6 100644
--- a/src/usermod.c
+++ b/src/usermod.c
@@ -262,20 +262,6 @@ static int get_groups (char *list)
 			continue;
 		}
 
-#ifdef	USE_NIS
-		/*
-		 * Don't add this group if they are an NIS group. Tell the
-		 * user to go to the server for this group.
-		 */
-		if (__isgrNIS ()) {
-			fprintf (stderr,
-			         _("%s: group '%s' is a NIS group.\n"),
-			         Prog, grp->gr_name);
-			gr_free (grp);
-			continue;
-		}
-#endif
-
 		if (ngroups == sys_ngroups) {
 			fprintf (stderr,
 			         _("%s: too many groups specified (max %d).\n"),
@@ -1286,28 +1272,6 @@ static void process_flags (int argc, char **argv)
 		prefix_user_newhome = user_newhome;
 	}
 
-#ifdef	USE_NIS
-	/*
-	 * Now make sure it isn't an NIS user.
-	 */
-	if (__ispwNIS ()) {
-		char *nis_domain;
-		char *nis_master;
-
-		fprintf (stderr,
-		         _("%s: user %s is a NIS user\n"),
-		         Prog, user_name);
-
-		if (   !yp_get_default_domain (&nis_domain)
-		    && !yp_master (nis_domain, "passwd.byname", &nis_master)) {
-			fprintf (stderr,
-			         _("%s: %s is the NIS master\n"),
-			         Prog, nis_master);
-		}
-		exit (E_NOTFOUND);
-	}
-#endif
-
 	{
 		const struct spwd *spwd = NULL;
 		/* local, no need for xgetspnam */