about summary refs log tree commit diff
path: root/REORG.TODO/posix/tst-exec.c
diff options
context:
space:
mode:
Diffstat (limited to 'REORG.TODO/posix/tst-exec.c')
-rw-r--r--REORG.TODO/posix/tst-exec.c199
1 files changed, 199 insertions, 0 deletions
diff --git a/REORG.TODO/posix/tst-exec.c b/REORG.TODO/posix/tst-exec.c
new file mode 100644
index 0000000000..12a0f57114
--- /dev/null
+++ b/REORG.TODO/posix/tst-exec.c
@@ -0,0 +1,199 @@
+/* Tests for exec.
+   Copyright (C) 2000-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 2000.
+
+   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 <errno.h>
+#include <error.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <wait.h>
+
+
+/* Nonzero if the program gets called via `exec'.  */
+static int restart;
+
+
+#define CMDLINE_OPTIONS \
+  { "restart", no_argument, &restart, 1 },
+
+/* Prototype for our test function.  */
+extern void do_prepare (int argc, char *argv[]);
+extern int do_test (int argc, char *argv[]);
+
+/* We have a preparation function.  */
+#define PREPARE do_prepare
+
+#include "../test-skeleton.c"
+
+
+/* Name of the temporary files.  */
+static char *name1;
+static char *name2;
+
+/* File descriptors for these temporary files.  */
+static int temp_fd1 = -1;
+static int temp_fd2 = -1;
+
+/* The contents of our files.  */
+static const char fd1string[] = "This file should get closed";
+static const char fd2string[] = "This file should stay opened";
+
+
+/* We have a preparation function.  */
+void
+do_prepare (int argc, char *argv[])
+{
+  /* We must not open any files in the restart case.  */
+  if (restart)
+    return;
+
+  temp_fd1 = create_temp_file ("exec", &name1);
+  temp_fd2 = create_temp_file ("exec", &name2);
+  if (temp_fd1 < 0 || temp_fd2 < 0)
+    exit (1);
+}
+
+
+static int
+handle_restart (const char *fd1s, const char *fd2s, const char *name)
+{
+  char buf[100];
+  int fd1;
+  int fd2;
+
+  /* First get the descriptors.  */
+  fd1 = atol (fd1s);
+  fd2 = atol (fd2s);
+
+  /* Sanity check.  */
+  if (fd1 == fd2)
+    error (EXIT_FAILURE, 0, "value of fd1 and fd2 is the same");
+
+  /* First the easy part: read from the file descriptor which is
+     supposed to be open.  */
+  if (lseek (fd2, 0, SEEK_CUR) != strlen (fd2string))
+    error (EXIT_FAILURE, errno, "file 2 not in right position");
+  if (lseek (fd2, 0, SEEK_SET) != 0)
+    error (EXIT_FAILURE, 0, "cannot reset position in file 2");
+  if (read (fd2, buf, sizeof buf) != strlen (fd2string))
+    error (EXIT_FAILURE, 0, "cannot read file 2");
+  if (memcmp (fd2string, buf, strlen (fd2string)) != 0)
+    error (EXIT_FAILURE, 0, "file 2 does not match");
+
+  /* No try to read the first file.  First make sure it is not opened.  */
+  if (lseek (fd1, 0, SEEK_CUR) != (off_t) -1 || errno != EBADF)
+    error (EXIT_FAILURE, 0, "file 1 (%d) is not closed", fd1);
+
+  /* Now open the file and read it.  */
+  fd1 = open (name, O_RDONLY);
+  if (fd1 == -1)
+    error (EXIT_FAILURE, errno,
+	   "cannot open first file \"%s\" for verification", name);
+
+  if (read (fd1, buf, sizeof buf) != strlen (fd1string))
+    error (EXIT_FAILURE, errno, "cannot read file 1");
+  if (memcmp (fd1string, buf, strlen (fd1string)) != 0)
+    error (EXIT_FAILURE, 0, "file 1 does not match");
+
+  return 0;
+}
+
+
+int
+do_test (int argc, char *argv[])
+{
+  pid_t pid;
+  int flags;
+  int status;
+
+  /* We must have
+     - one or four parameters left if called initially
+       + path for ld.so		optional
+       + "--library-path"	optional
+       + the library path	optional
+       + the application name
+     - three parameters left if called through re-execution
+       + file descriptor number which is supposed to be closed
+       + the open file descriptor
+       + the name of the closed desriptor
+  */
+
+  if (restart)
+    {
+      if (argc != 4)
+	error (EXIT_FAILURE, 0, "wrong number of arguments (%d)", argc);
+
+      return handle_restart (argv[1], argv[2], argv[3]);
+    }
+
+  if (argc != 2 && argc != 5)
+    error (EXIT_FAILURE, 0, "wrong number of arguments (%d)", argc);
+
+  /* Prepare the test.  We are creating two files: one which file descriptor
+     will be marked with FD_CLOEXEC, another which is not.  */
+
+   /* Set the bit.  */
+   flags = fcntl (temp_fd1, F_GETFD, 0);
+   if (flags < 0)
+     error (EXIT_FAILURE, errno, "cannot get flags");
+   flags |= FD_CLOEXEC;
+   if (fcntl (temp_fd1, F_SETFD, flags) < 0)
+     error (EXIT_FAILURE, errno, "cannot set flags");
+
+   /* Write something in the files.  */
+   if (write (temp_fd1, fd1string, strlen (fd1string)) != strlen (fd1string))
+     error (EXIT_FAILURE, errno, "cannot write to first file");
+   if (write (temp_fd2, fd2string, strlen (fd2string)) != strlen (fd2string))
+     error (EXIT_FAILURE, errno, "cannot write to second file");
+
+  /* We want to test the `exec' function.  To do this we restart the program
+     with an additional parameter.  But first create another process.  */
+  pid = fork ();
+  if (pid == 0)
+    {
+      char fd1name[18];
+      char fd2name[18];
+
+      snprintf (fd1name, sizeof fd1name, "%d", temp_fd1);
+      snprintf (fd2name, sizeof fd2name, "%d", temp_fd2);
+
+      /* This is the child.  Construct the command line.  */
+      if (argc == 5)
+	execl (argv[1], argv[1], argv[2], argv[3], argv[4], "--direct",
+	       "--restart", fd1name, fd2name, name1, NULL);
+      else
+	execl (argv[1], argv[1], "--direct",
+	       "--restart", fd1name, fd2name, name1, NULL);
+
+      error (EXIT_FAILURE, errno, "cannot exec");
+    }
+  else if (pid == (pid_t) -1)
+    error (EXIT_FAILURE, errno, "cannot fork");
+
+  /* Wait for the child.  */
+  if (waitpid (pid, &status, 0) != pid)
+    error (EXIT_FAILURE, errno, "wrong child");
+
+  if (WTERMSIG (status) != 0)
+    error (EXIT_FAILURE, 0, "Child terminated incorrectly");
+  status = WEXITSTATUS (status);
+
+  return status;
+}