/* Basic tests for pldd program.

   Copyright (C) 2019 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   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 <stdio.h>

#include <string.h>

#include <unistd.h>

#include <stdint.h>

#include <libgen.h>

#include <stdbool.h>

#include <array_length.h>

#include <gnu/lib-names.h>

#include <support/subprocess.h>

#include <support/capture_subprocess.h>

#include <support/check.h>

static void

target_process (void *arg)

{

  pause ();

}

/* The test runs in a container because pldd does not support tracing

   a binary started by the loader iself (as with testrun.sh).  */

static int

do_test (void)

{

  /* Create a copy of current test to check with pldd.  */

  struct support_subprocess target = support_subprocess (target_process, NULL);

  /* Run 'pldd' on test subprocess.  */

  struct support_capture_subprocess pldd;

  {

    /* Three digits per byte plus null terminator.  */

    char pid[3 * sizeof (uint32_t) + 1];

    snprintf (pid, array_length (pid), "%d", target.pid);

    const char prog[] = "/usr/bin/pldd";

    pldd = support_capture_subprogram (prog,

      (char *const []) { (char *) prog, pid, NULL });

    support_capture_subprocess_check (&pldd, "pldd", 0, sc_allow_stdout);

  }

  /* Check 'pldd' output.  The test is expected to be linked against only

     loader and libc.  */

  {

    pid_t pid;

    char buffer[512];

#define STRINPUT(size) "%" # size "s"

    FILE *out = fmemopen (pldd.out.buffer, pldd.out.length, "r");

    TEST_VERIFY (out != NULL);

    /* First line is in the form of <pid>: <full path of executable>  */

    TEST_COMPARE (fscanf (out, "%u: " STRINPUT (512), &pid, buffer), 2);

    TEST_COMPARE (pid, target.pid);

    TEST_COMPARE (strcmp (basename (buffer), "tst-pldd"), 0);

    /* It expects only one loader and libc loaded by the program.  */

    bool interpreter_found = false, libc_found = false;

    while (fgets (buffer, array_length (buffer), out) != NULL)

      {

       /* Ignore vDSO.  */

        if (buffer[0] != '/')

         continue;

       /* Remove newline so baseline (buffer) can compare against the

          LD_SO and LIBC_SO macros unmodified.  */

       if (buffer[strlen(buffer)-1] == '\n')

         buffer[strlen(buffer)-1] = '\0';

       if (strcmp (basename (buffer), LD_SO) == 0)

         {

           TEST_COMPARE (interpreter_found, false);

           interpreter_found = true;

           continue;

         }

       if (strcmp (basename (buffer), LIBC_SO) == 0)

         {

           TEST_COMPARE (libc_found, false);

           libc_found = true;

           continue;

         }

      }

    TEST_COMPARE (interpreter_found, true);

    TEST_COMPARE (libc_found, true);

    fclose (out);

  }

  support_capture_subprocess_free (&pldd);

  support_process_terminate (&target);

  return 0;

}

#include <support/test-driver.c>