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, 154 insertions, 0 deletions

diff --git a/REORG.TODO/nss/nss_test1.c b/REORG.TODO/nss/nss_test1.c
new file mode 100644
index 0000000000..3beb488fcf
--- /dev/null
+++ b/REORG.TODO/nss/nss_test1.c
@@ -0,0 +1,154 @@
+#include <errno.h>
+#include <nss.h>
+#include <pthread.h>
+#include <string.h>
+
+
+#define COPY_IF_ROOM(s) \
+  ({ size_t len_ = strlen (s) + 1;		\
+     char *start_ = cp;				\
+     buflen - (cp - buffer) < len_		\
+     ? NULL					\
+     : (cp = mempcpy (cp, s, len_), start_); })
+
+
+/* Password handling.  */
+#include <pwd.h>
+
+static struct passwd pwd_data[] =
+  {
+#define PWD(u) \
+    { .pw_name = (char *) "name" #u, .pw_passwd = (char *) "*", .pw_uid = u,  \
+      .pw_gid = 100, .pw_gecos = (char *) "*", .pw_dir = (char *) "*",	      \
+      .pw_shell = (char *) "*" }
+    PWD (100),
+    PWD (30),
+    PWD (200),
+    PWD (60),
+    PWD (20000)
+  };
+#define npwd_data (sizeof (pwd_data) / sizeof (pwd_data[0]))
+
+static size_t pwd_iter;
+#define CURPWD pwd_data[pwd_iter]
+
+static pthread_mutex_t pwd_lock = PTHREAD_MUTEX_INITIALIZER;
+
+
+enum nss_status
+_nss_test1_setpwent (int stayopen)
+{
+  pwd_iter = 0;
+  return NSS_STATUS_SUCCESS;
+}
+
+
+enum nss_status
+_nss_test1_endpwent (void)
+{
+  return NSS_STATUS_SUCCESS;
+}
+
+
+enum nss_status
+_nss_test1_getpwent_r (struct passwd *result, char *buffer, size_t buflen,
+		       int *errnop)
+{
+  char *cp = buffer;
+  int res = NSS_STATUS_SUCCESS;
+
+  pthread_mutex_lock (&pwd_lock);
+
+  if (pwd_iter >= npwd_data)
+    res = NSS_STATUS_NOTFOUND;
+  else
+    {
+      result->pw_name = COPY_IF_ROOM (CURPWD.pw_name);
+      result->pw_passwd = COPY_IF_ROOM (CURPWD.pw_passwd);
+      result->pw_uid = CURPWD.pw_uid;
+      result->pw_gid = CURPWD.pw_gid;
+      result->pw_gecos = COPY_IF_ROOM (CURPWD.pw_gecos);
+      result->pw_dir = COPY_IF_ROOM (CURPWD.pw_dir);
+      result->pw_shell = COPY_IF_ROOM (CURPWD.pw_shell);
+
+      if (result->pw_name == NULL || result->pw_passwd == NULL
+	  || result->pw_gecos == NULL || result->pw_dir == NULL
+	  || result->pw_shell == NULL)
+	{
+	  *errnop = ERANGE;
+	  res = NSS_STATUS_TRYAGAIN;
+	}
+
+      ++pwd_iter;
+    }
+
+  pthread_mutex_unlock (&pwd_lock);
+
+  return res;
+}
+
+
+enum nss_status
+_nss_test1_getpwuid_r (uid_t uid, struct passwd *result, char *buffer,
+		       size_t buflen, int *errnop)
+{
+  for (size_t idx = 0; idx < npwd_data; ++idx)
+    if (pwd_data[idx].pw_uid == uid)
+      {
+	char *cp = buffer;
+	int res = NSS_STATUS_SUCCESS;
+
+	result->pw_name = COPY_IF_ROOM (pwd_data[idx].pw_name);
+	result->pw_passwd = COPY_IF_ROOM (pwd_data[idx].pw_passwd);
+	result->pw_uid = pwd_data[idx].pw_uid;
+	result->pw_gid = pwd_data[idx].pw_gid;
+	result->pw_gecos = COPY_IF_ROOM (pwd_data[idx].pw_gecos);
+	result->pw_dir = COPY_IF_ROOM (pwd_data[idx].pw_dir);
+	result->pw_shell = COPY_IF_ROOM (pwd_data[idx].pw_shell);
+
+	if (result->pw_name == NULL || result->pw_passwd == NULL
+	    || result->pw_gecos == NULL || result->pw_dir == NULL
+	    || result->pw_shell == NULL)
+	  {
+	    *errnop = ERANGE;
+	    res = NSS_STATUS_TRYAGAIN;
+	  }
+
+	return res;
+      }
+
+  return NSS_STATUS_NOTFOUND;
+}
+
+
+enum nss_status
+_nss_test1_getpwnam_r (const char *name, struct passwd *result, char *buffer,
+		       size_t buflen, int *errnop)
+{
+  for (size_t idx = 0; idx < npwd_data; ++idx)
+    if (strcmp (pwd_data[idx].pw_name, name) == 0)
+      {
+	char *cp = buffer;
+	int res = NSS_STATUS_SUCCESS;
+
+	result->pw_name = COPY_IF_ROOM (pwd_data[idx].pw_name);
+	result->pw_passwd = COPY_IF_ROOM (pwd_data[idx].pw_passwd);
+	result->pw_uid = pwd_data[idx].pw_uid;
+	result->pw_gid = pwd_data[idx].pw_gid;
+	result->pw_gecos = COPY_IF_ROOM (pwd_data[idx].pw_gecos);
+	result->pw_dir = COPY_IF_ROOM (pwd_data[idx].pw_dir);
+	result->pw_shell = COPY_IF_ROOM (pwd_data[idx].pw_shell);
+
+	if (result->pw_name == NULL || result->pw_passwd == NULL
+	    || result->pw_gecos == NULL || result->pw_dir == NULL
+	    || result->pw_shell == NULL)
+	  {
+	    *errnop = ERANGE;
+	    res = NSS_STATUS_TRYAGAIN;
+	  }
+
+	return res;
+      }
+
+  return NSS_STATUS_NOTFOUND;
+}