Prepare for radical source tree reorganization. zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 683 insertions, 0 deletions

diff --git a/REORG.TODO/nis/nss_compat/compat-grp.c b/REORG.TODO/nis/nss_compat/compat-grp.c
new file mode 100644
index 0000000000..0381458c0c
--- /dev/null
+++ b/REORG.TODO/nis/nss_compat/compat-grp.c
@@ -0,0 +1,683 @@
+/* Copyright (C) 1996-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Thorsten Kukuk <kukuk@suse.de>, 1996.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <grp.h>
+#include <nss.h>
+#include <nsswitch.h>
+#include <stdio_ext.h>
+#include <string.h>
+#include <rpc/types.h>
+#include <libc-lock.h>
+#include <kernel-features.h>
+
+static service_user *ni;
+static enum nss_status (*nss_setgrent) (int stayopen);
+static enum nss_status (*nss_getgrnam_r) (const char *name,
+					  struct group * grp, char *buffer,
+					  size_t buflen, int *errnop);
+static enum nss_status (*nss_getgrgid_r) (gid_t gid, struct group * grp,
+					  char *buffer, size_t buflen,
+					  int *errnop);
+static enum nss_status (*nss_getgrent_r) (struct group * grp, char *buffer,
+					  size_t buflen, int *errnop);
+static enum nss_status (*nss_endgrent) (void);
+
+/* Get the declaration of the parser function.  */
+#define ENTNAME grent
+#define STRUCTURE group
+#define EXTERN_PARSER
+#include <nss/nss_files/files-parse.c>
+
+/* Structure for remembering -group members ... */
+#define BLACKLIST_INITIAL_SIZE 512
+#define BLACKLIST_INCREMENT 256
+struct blacklist_t
+{
+  char *data;
+  int current;
+  int size;
+};
+
+struct ent_t
+{
+  bool_t files;
+  enum nss_status setent_status;
+  FILE *stream;
+  struct blacklist_t blacklist;
+};
+typedef struct ent_t ent_t;
+
+static ent_t ext_ent = { TRUE, NSS_STATUS_SUCCESS, NULL, { NULL, 0, 0 }};
+
+/* Protect global state against multiple changers.  */
+__libc_lock_define_initialized (static, lock)
+
+/* Prototypes for local functions.  */
+static void blacklist_store_name (const char *, ent_t *);
+static int in_blacklist (const char *, int, ent_t *);
+
+/* Initialize the NSS interface/functions. The calling function must
+   hold the lock.  */
+static void
+init_nss_interface (void)
+{
+  if (__nss_database_lookup ("group_compat", NULL, "nis", &ni) >= 0)
+    {
+      nss_setgrent = __nss_lookup_function (ni, "setgrent");
+      nss_getgrnam_r = __nss_lookup_function (ni, "getgrnam_r");
+      nss_getgrgid_r = __nss_lookup_function (ni, "getgrgid_r");
+      nss_getgrent_r = __nss_lookup_function (ni, "getgrent_r");
+      nss_endgrent = __nss_lookup_function (ni, "endgrent");
+    }
+}
+
+static enum nss_status
+internal_setgrent (ent_t *ent, int stayopen, int needent)
+{
+  enum nss_status status = NSS_STATUS_SUCCESS;
+
+  ent->files = TRUE;
+
+  if (ent->blacklist.data != NULL)
+    {
+      ent->blacklist.current = 1;
+      ent->blacklist.data[0] = '|';
+      ent->blacklist.data[1] = '\0';
+    }
+  else
+    ent->blacklist.current = 0;
+
+  if (ent->stream == NULL)
+    {
+      ent->stream = fopen ("/etc/group", "rme");
+
+      if (ent->stream == NULL)
+	status = errno == EAGAIN ? NSS_STATUS_TRYAGAIN : NSS_STATUS_UNAVAIL;
+      else
+	/* We take care of locking ourself.  */
+	__fsetlocking (ent->stream, FSETLOCKING_BYCALLER);
+    }
+  else
+    rewind (ent->stream);
+
+  if (needent && status == NSS_STATUS_SUCCESS && nss_setgrent)
+    ent->setent_status = nss_setgrent (stayopen);
+
+  return status;
+}
+
+
+enum nss_status
+_nss_compat_setgrent (int stayopen)
+{
+  enum nss_status result;
+
+  __libc_lock_lock (lock);
+
+  if (ni == NULL)
+    init_nss_interface ();
+
+  result = internal_setgrent (&ext_ent, stayopen, 1);
+
+  __libc_lock_unlock (lock);
+
+  return result;
+}
+
+
+static enum nss_status
+internal_endgrent (ent_t *ent)
+{
+  if (ent->stream != NULL)
+    {
+      fclose (ent->stream);
+      ent->stream = NULL;
+    }
+
+  if (ent->blacklist.data != NULL)
+    {
+      ent->blacklist.current = 1;
+      ent->blacklist.data[0] = '|';
+      ent->blacklist.data[1] = '\0';
+    }
+  else
+    ent->blacklist.current = 0;
+
+  return NSS_STATUS_SUCCESS;
+}
+
+enum nss_status
+_nss_compat_endgrent (void)
+{
+  enum nss_status result;
+
+  __libc_lock_lock (lock);
+
+  if (nss_endgrent)
+    nss_endgrent ();
+
+  result = internal_endgrent (&ext_ent);
+
+  __libc_lock_unlock (lock);
+
+  return result;
+}
+
+/* get the next group from NSS  (+ entry) */
+static enum nss_status
+getgrent_next_nss (struct group *result, ent_t *ent, char *buffer,
+		   size_t buflen, int *errnop)
+{
+  if (!nss_getgrent_r)
+    return NSS_STATUS_UNAVAIL;
+
+  /* If the setgrent call failed, say so.  */
+  if (ent->setent_status != NSS_STATUS_SUCCESS)
+    return ent->setent_status;
+
+  do
+    {
+      enum nss_status status;
+
+      if ((status = nss_getgrent_r (result, buffer, buflen, errnop)) !=
+	  NSS_STATUS_SUCCESS)
+	return status;
+    }
+  while (in_blacklist (result->gr_name, strlen (result->gr_name), ent));
+
+  return NSS_STATUS_SUCCESS;
+}
+
+/* This function handle the +group entrys in /etc/group */
+static enum nss_status
+getgrnam_plusgroup (const char *name, struct group *result, ent_t *ent,
+		    char *buffer, size_t buflen, int *errnop)
+{
+  if (!nss_getgrnam_r)
+    return NSS_STATUS_UNAVAIL;
+
+  enum nss_status status = nss_getgrnam_r (name, result, buffer, buflen,
+					   errnop);
+  if (status != NSS_STATUS_SUCCESS)
+    return status;
+
+  if (in_blacklist (result->gr_name, strlen (result->gr_name), ent))
+    return NSS_STATUS_NOTFOUND;
+
+  /* We found the entry.  */
+  return NSS_STATUS_SUCCESS;
+}
+
+static enum nss_status
+getgrent_next_file (struct group *result, ent_t *ent,
+		    char *buffer, size_t buflen, int *errnop)
+{
+  struct parser_data *data = (void *) buffer;
+  while (1)
+    {
+      fpos_t pos;
+      int parse_res = 0;
+      char *p;
+
+      do
+	{
+	  /* We need at least 3 characters for one line.  */
+	  if (__glibc_unlikely (buflen < 3))
+	    {
+	    erange:
+	      *errnop = ERANGE;
+	      return NSS_STATUS_TRYAGAIN;
+	    }
+
+	  fgetpos (ent->stream, &pos);
+	  buffer[buflen - 1] = '\xff';
+	  p = fgets_unlocked (buffer, buflen, ent->stream);
+	  if (p == NULL && feof_unlocked (ent->stream))
+	    return NSS_STATUS_NOTFOUND;
+
+	  if (p == NULL || __builtin_expect (buffer[buflen - 1] != '\xff', 0))
+	    {
+	    erange_reset:
+	      fsetpos (ent->stream, &pos);
+	      goto erange;
+	    }
+
+	  /* Terminate the line for any case.  */
+	  buffer[buflen - 1] = '\0';
+
+	  /* Skip leading blanks.  */
+	  while (isspace (*p))
+	    ++p;
+	}
+      while (*p == '\0' || *p == '#' ||	/* Ignore empty and comment lines. */
+	     /* Parse the line.  If it is invalid, loop to
+	        get the next line of the file to parse.  */
+	     !(parse_res = _nss_files_parse_grent (p, result, data, buflen,
+						   errnop)));
+
+      if (__glibc_unlikely (parse_res == -1))
+	/* The parser ran out of space.  */
+	goto erange_reset;
+
+      if (result->gr_name[0] != '+' && result->gr_name[0] != '-')
+	/* This is a real entry.  */
+	break;
+
+      /* -group */
+      if (result->gr_name[0] == '-' && result->gr_name[1] != '\0'
+	  && result->gr_name[1] != '@')
+	{
+	  blacklist_store_name (&result->gr_name[1], ent);
+	  continue;
+	}
+
+      /* +group */
+      if (result->gr_name[0] == '+' && result->gr_name[1] != '\0'
+	  && result->gr_name[1] != '@')
+	{
+	  size_t len = strlen (result->gr_name);
+	  char buf[len];
+	  enum nss_status status;
+
+	  /* Store the group in the blacklist for the "+" at the end of
+	     /etc/group */
+	  memcpy (buf, &result->gr_name[1], len);
+	  status = getgrnam_plusgroup (&result->gr_name[1], result, ent,
+				       buffer, buflen, errnop);
+	  blacklist_store_name (buf, ent);
+	  if (status == NSS_STATUS_SUCCESS)	/* We found the entry. */
+	    break;
+	  else if (status == NSS_STATUS_RETURN /* We couldn't parse the entry*/
+		   || status == NSS_STATUS_NOTFOUND)	/* No group in NIS */
+	    continue;
+	  else
+	    {
+	      if (status == NSS_STATUS_TRYAGAIN)
+		/* The parser ran out of space.  */
+		goto erange_reset;
+
+	      return status;
+	    }
+	}
+
+      /* +:... */
+      if (result->gr_name[0] == '+' && result->gr_name[1] == '\0')
+	{
+	  ent->files = FALSE;
+
+	  return getgrent_next_nss (result, ent, buffer, buflen, errnop);
+	}
+    }
+
+  return NSS_STATUS_SUCCESS;
+}
+
+
+enum nss_status
+_nss_compat_getgrent_r (struct group *grp, char *buffer, size_t buflen,
+			int *errnop)
+{
+  enum nss_status result = NSS_STATUS_SUCCESS;
+
+  __libc_lock_lock (lock);
+
+  /* Be prepared that the setgrent function was not called before.  */
+  if (ni == NULL)
+    init_nss_interface ();
+
+  if (ext_ent.stream == NULL)
+    result = internal_setgrent (&ext_ent, 1, 1);
+
+  if (result == NSS_STATUS_SUCCESS)
+    {
+      if (ext_ent.files)
+	result = getgrent_next_file (grp, &ext_ent, buffer, buflen, errnop);
+      else
+	result = getgrent_next_nss (grp, &ext_ent, buffer, buflen, errnop);
+    }
+  __libc_lock_unlock (lock);
+
+  return result;
+}
+
+/* Searches in /etc/group and the NIS/NIS+ map for a special group */
+static enum nss_status
+internal_getgrnam_r (const char *name, struct group *result, ent_t *ent,
+		     char *buffer, size_t buflen, int *errnop)
+{
+  struct parser_data *data = (void *) buffer;
+  while (1)
+    {
+      fpos_t pos;
+      int parse_res = 0;
+      char *p;
+
+      do
+	{
+	  /* We need at least 3 characters for one line.  */
+	  if (__glibc_unlikely (buflen < 3))
+	    {
+	    erange:
+	      *errnop = ERANGE;
+	      return NSS_STATUS_TRYAGAIN;
+	    }
+
+	  fgetpos (ent->stream, &pos);
+	  buffer[buflen - 1] = '\xff';
+	  p = fgets_unlocked (buffer, buflen, ent->stream);
+	  if (p == NULL && feof_unlocked (ent->stream))
+	    return NSS_STATUS_NOTFOUND;
+
+	  if (p == NULL || __builtin_expect (buffer[buflen - 1] != '\xff', 0))
+	    {
+	    erange_reset:
+	      fsetpos (ent->stream, &pos);
+	      goto erange;
+	    }
+
+	  /* Terminate the line for any case.  */
+	  buffer[buflen - 1] = '\0';
+
+	  /* Skip leading blanks.  */
+	  while (isspace (*p))
+	    ++p;
+	}
+      while (*p == '\0' || *p == '#' ||	/* Ignore empty and comment lines. */
+	     /* Parse the line.  If it is invalid, loop to
+	        get the next line of the file to parse.  */
+	     !(parse_res = _nss_files_parse_grent (p, result, data, buflen,
+						   errnop)));
+
+      if (__glibc_unlikely (parse_res == -1))
+	/* The parser ran out of space.  */
+	goto erange_reset;
+
+      /* This is a real entry.  */
+      if (result->gr_name[0] != '+' && result->gr_name[0] != '-')
+	{
+	  if (strcmp (result->gr_name, name) == 0)
+	    return NSS_STATUS_SUCCESS;
+	  else
+	    continue;
+	}
+
+      /* -group */
+      if (result->gr_name[0] == '-' && result->gr_name[1] != '\0')
+	{
+	  if (strcmp (&result->gr_name[1], name) == 0)
+	    return NSS_STATUS_NOTFOUND;
+	  else
+	    continue;
+	}
+
+      /* +group */
+      if (result->gr_name[0] == '+' && result->gr_name[1] != '\0')
+	{
+	  if (strcmp (name, &result->gr_name[1]) == 0)
+	    {
+	      enum nss_status status;
+
+	      status = getgrnam_plusgroup (name, result, ent,
+					   buffer, buflen, errnop);
+	      if (status == NSS_STATUS_RETURN)
+		/* We couldn't parse the entry */
+		continue;
+	      else
+		return status;
+	    }
+	}
+      /* +:... */
+      if (result->gr_name[0] == '+' && result->gr_name[1] == '\0')
+	{
+	  enum nss_status status;
+
+	  status = getgrnam_plusgroup (name, result, ent,
+				       buffer, buflen, errnop);
+	  if (status == NSS_STATUS_RETURN)
+	    /* We couldn't parse the entry */
+	    continue;
+	  else
+	    return status;
+	}
+    }
+
+  return NSS_STATUS_SUCCESS;
+}
+
+enum nss_status
+_nss_compat_getgrnam_r (const char *name, struct group *grp,
+			char *buffer, size_t buflen, int *errnop)
+{
+  ent_t ent = { TRUE, NSS_STATUS_SUCCESS, NULL, { NULL, 0, 0 }};
+  enum nss_status result;
+
+  if (name[0] == '-' || name[0] == '+')
+    return NSS_STATUS_NOTFOUND;
+
+  __libc_lock_lock (lock);
+
+  if (ni == NULL)
+    init_nss_interface ();
+
+  __libc_lock_unlock (lock);
+
+  result = internal_setgrent (&ent, 0, 0);
+
+  if (result == NSS_STATUS_SUCCESS)
+    result = internal_getgrnam_r (name, grp, &ent, buffer, buflen, errnop);
+
+  internal_endgrent (&ent);
+
+  return result;
+}
+
+/* Searches in /etc/group and the NIS/NIS+ map for a special group id */
+static enum nss_status
+internal_getgrgid_r (gid_t gid, struct group *result, ent_t *ent,
+		     char *buffer, size_t buflen, int *errnop)
+{
+  struct parser_data *data = (void *) buffer;
+  while (1)
+    {
+      fpos_t pos;
+      int parse_res = 0;
+      char *p;
+
+      do
+	{
+	  /* We need at least 3 characters for one line.  */
+	  if (__glibc_unlikely (buflen < 3))
+	    {
+	    erange:
+	      *errnop = ERANGE;
+	      return NSS_STATUS_TRYAGAIN;
+	    }
+
+	  fgetpos (ent->stream, &pos);
+	  buffer[buflen - 1] = '\xff';
+	  p = fgets_unlocked (buffer, buflen, ent->stream);
+	  if (p == NULL && feof_unlocked (ent->stream))
+	    return NSS_STATUS_NOTFOUND;
+
+	  if (p == NULL || __builtin_expect (buffer[buflen - 1] != '\xff', 0))
+	    {
+	    erange_reset:
+	      fsetpos (ent->stream, &pos);
+	      goto erange;
+	    }
+
+	  /* Terminate the line for any case.  */
+	  buffer[buflen - 1] = '\0';
+
+	  /* Skip leading blanks.  */
+	  while (isspace (*p))
+	    ++p;
+	}
+      while (*p == '\0' || *p == '#' ||	/* Ignore empty and comment lines. */
+	     /* Parse the line.  If it is invalid, loop to
+	        get the next line of the file to parse.  */
+	     !(parse_res = _nss_files_parse_grent (p, result, data, buflen,
+						   errnop)));
+
+      if (__glibc_unlikely (parse_res == -1))
+	/* The parser ran out of space.  */
+	goto erange_reset;
+
+      /* This is a real entry.  */
+      if (result->gr_name[0] != '+' && result->gr_name[0] != '-')
+	{
+	  if (result->gr_gid == gid)
+	    return NSS_STATUS_SUCCESS;
+	  else
+	    continue;
+	}
+
+      /* -group */
+      if (result->gr_name[0] == '-' && result->gr_name[1] != '\0')
+	{
+	  blacklist_store_name (&result->gr_name[1], ent);
+	  continue;
+	}
+
+      /* +group */
+      if (result->gr_name[0] == '+' && result->gr_name[1] != '\0')
+	{
+	  /* Yes, no +1, see the memcpy call below.  */
+	  size_t len = strlen (result->gr_name);
+	  char buf[len];
+	  enum nss_status status;
+
+	  /* Store the group in the blacklist for the "+" at the end of
+	     /etc/group */
+	  memcpy (buf, &result->gr_name[1], len);
+	  status = getgrnam_plusgroup (&result->gr_name[1], result, ent,
+				       buffer, buflen, errnop);
+	  blacklist_store_name (buf, ent);
+	  if (status == NSS_STATUS_SUCCESS && result->gr_gid == gid)
+	    break;
+	  else
+	    continue;
+	}
+      /* +:... */
+      if (result->gr_name[0] == '+' && result->gr_name[1] == '\0')
+	{
+	  if (!nss_getgrgid_r)
+	    return NSS_STATUS_UNAVAIL;
+
+	  enum nss_status status = nss_getgrgid_r (gid, result, buffer, buflen,
+						   errnop);
+	  if (status == NSS_STATUS_RETURN) /* We couldn't parse the entry */
+	    return NSS_STATUS_NOTFOUND;
+	  else
+	    return status;
+	}
+    }
+
+  return NSS_STATUS_SUCCESS;
+}
+
+enum nss_status
+_nss_compat_getgrgid_r (gid_t gid, struct group *grp,
+			char *buffer, size_t buflen, int *errnop)
+{
+  ent_t ent = { TRUE, NSS_STATUS_SUCCESS, NULL, { NULL, 0, 0 }};
+  enum nss_status result;
+
+  __libc_lock_lock (lock);
+
+  if (ni == NULL)
+    init_nss_interface ();
+
+  __libc_lock_unlock (lock);
+
+  result = internal_setgrent (&ent, 0, 0);
+
+  if (result == NSS_STATUS_SUCCESS)
+    result = internal_getgrgid_r (gid, grp, &ent, buffer, buflen, errnop);
+
+  internal_endgrent (&ent);
+
+  return result;
+}
+
+
+/* Support routines for remembering -@netgroup and -user entries.
+   The names are stored in a single string with `|' as separator. */
+static void
+blacklist_store_name (const char *name, ent_t *ent)
+{
+  int namelen = strlen (name);
+  char *tmp;
+
+  /* first call, setup cache */
+  if (ent->blacklist.size == 0)
+    {
+      ent->blacklist.size = MAX (BLACKLIST_INITIAL_SIZE, 2 * namelen);
+      ent->blacklist.data = malloc (ent->blacklist.size);
+      if (ent->blacklist.data == NULL)
+	return;
+      ent->blacklist.data[0] = '|';
+      ent->blacklist.data[1] = '\0';
+      ent->blacklist.current = 1;
+    }
+  else
+    {
+      if (in_blacklist (name, namelen, ent))
+	return;			/* no duplicates */
+
+      if (ent->blacklist.current + namelen + 1 >= ent->blacklist.size)
+	{
+	  ent->blacklist.size += MAX (BLACKLIST_INCREMENT, 2 * namelen);
+	  tmp = realloc (ent->blacklist.data, ent->blacklist.size);
+	  if (tmp == NULL)
+	    {
+	      free (ent->blacklist.data);
+	      ent->blacklist.size = 0;
+	      return;
+	    }
+	  ent->blacklist.data = tmp;
+	}
+    }
+
+  tmp = stpcpy (ent->blacklist.data + ent->blacklist.current, name);
+  *tmp++ = '|';
+  *tmp = '\0';
+  ent->blacklist.current += namelen + 1;
+
+  return;
+}
+
+/* returns TRUE if ent->blacklist contains name, else FALSE */
+static bool_t
+in_blacklist (const char *name, int namelen, ent_t *ent)
+{
+  char buf[namelen + 3];
+  char *cp;
+
+  if (ent->blacklist.data == NULL)
+    return FALSE;
+
+  buf[0] = '|';
+  cp = stpcpy (&buf[1], name);
+  *cp++ = '|';
+  *cp = '\0';
+  return strstr (ent->blacklist.data, buf) != NULL;
+}