asschk.c 23.4 KB
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/* asschk.c - Assuan Server Checker
 *	Copyright (C) 2002 Free Software Foundation, Inc.
 *
 * This file is part of GnuPG.
 *
 * GnuPG is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; either version 3 of the License, or
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 * (at your option) any later version.
 *
 * GnuPG 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, see <https://www.gnu.org/licenses/>.
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 */

/* This is a simple stand-alone Assuan server test program.  We don't
   want to use the assuan library because we don't want to hide errors
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   in that library.
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   The script language is line based.  Empty lines or lines containing
   only white spaces are ignored, line with a hash sign as first non
   white space character are treated as comments.
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   A simple macro mechanism is implemnted.  Macros are expanded before
   a line is processed but after comment processing.  Macros are only
   expanded once and non existing macros expand to the empty string.
   A macro is dereferenced by prefixing its name with a dollar sign;
   the end of the name is currently indicated by a white space, a
   dollar sign or a slash.  To use a dollor sign verbatim, double it.

   A macro is assigned by prefixing a statement with the macro name
   and an equal sign.  The value is assigned verbatim if it does not
   resemble a command, otherwise the return value of the command will
   get assigned.  The command "let" may be used to assign values
   unambigiously and it should be used if the value starts with a
   letter.

   Conditions are not yes implemented except for a simple evaluation
   which yields false for an empty string or the string "0".  The
   result may be negated by prefixing with a '!'.

   The general syntax of a command is:

   [<name> =] <statement> [<args>]

   If NAME is not specifed but the statement returns a value it is
   assigned to the name "?" so that it can be referenced using "$?".
   The following commands are implemented:

   let <value>
      Return VALUE.

   echo <value>
      Print VALUE.

   openfile <filename>
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      Open file FILENAME for read access and return the file descriptor.
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   createfile <filename>
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      Create file FILENAME, open for write access and return the file
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      descriptor.

   pipeserver <program>
      Connect to the Assuan server PROGRAM.

   send <line>
      Send LINE to the server.

   expect-ok
      Expect an OK response from the server.  Status and data out put
      is ignored.

   expect-err
      Expect an ERR response from the server.  Status and data out put
      is ignored.

   count-status <code>
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      Initialize the assigned variable to 0 and assign it as an counter for
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      status code CODE.  This command must be called with an assignment.

   quit
      Terminate the process.

   quit-if <condition>
      Terminate the process if CONDITION evaluates to true.

   fail-if <condition>
      Terminate the process with an exit code of 1 if CONDITION
      evaluates to true.

   cmpfiles <first> <second>
      Returns true when the content of the files FIRST and SECOND match.

   getenv <name>
      Return the value of the environment variable NAME.

*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <stdarg.h>
#include <assert.h>
#include <unistd.h>
#include <fcntl.h>

#if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 5 )
# define ATTR_PRINTF(f,a)  __attribute__ ((format (printf,f,a)))
#else
# define ATTR_PRINTF(f,a)
#endif

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#if __STDC_VERSION__ < 199901L
# if __GNUC__ >= 2
#  define __func__ __FUNCTION__
# else
/* Let's try our luck here.  Some systems may provide __func__ without
   providing __STDC_VERSION__ 199901L.  */
#  if 0
#   define __func__ "<unknown>"
#  endif
# endif
#endif

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#define spacep(p) (*(p) == ' ' || *(p) == '\t')

#define MAX_LINELEN 2048

typedef enum {
  LINE_OK = 0,
  LINE_ERR,
  LINE_STAT,
  LINE_DATA,
  LINE_END,
} LINETYPE;

typedef enum {
  VARTYPE_SIMPLE = 0,
  VARTYPE_FD,
  VARTYPE_COUNTER
} VARTYPE;


struct variable_s {
  struct variable_s *next;
  VARTYPE type;
  unsigned int count;
  char *value;
  char name[1];
};
typedef struct variable_s *VARIABLE;


static void die (const char *format, ...)  ATTR_PRINTF(1,2);


/* Name of this program to be printed in error messages. */
static const char *invocation_name;

/* Talk a bit about what is going on. */
static int opt_verbose;

/* Option to ignore the echo command. */
static int opt_no_echo;

/* File descriptors used to communicate with the current server. */
static int server_send_fd = -1;
static int server_recv_fd = -1;

/* The Assuan protocol limits the line length to 1024, so we can
   safely use a (larger) buffer.  The buffer is filled using the
   read_assuan(). */
static char recv_line[MAX_LINELEN];
/* Tell the status of the current line. */
static LINETYPE recv_type;

/* This is our variable storage. */
static VARIABLE variable_list;


static void
die (const char *format, ...)
{
  va_list arg_ptr;

  fflush (stdout);
  fprintf (stderr, "%s: ", invocation_name);

  va_start (arg_ptr, format);
  vfprintf (stderr, format, arg_ptr);
  va_end (arg_ptr);
  putc ('\n', stderr);

  exit (1);
}

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#define die_0(format)          (die) ("%s: " format, __func__)
#define die_1(format, a)       (die) ("%s: " format, __func__, (a))
#define die_2(format, a, b)    (die) ("%s: " format, __func__, (a),(b))
#define die_3(format, a, b, c) (die) ("%s: " format, __func__, (a),(b),(c))
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static void
err (const char *format, ...)
{
  va_list arg_ptr;

  fflush (stdout);
  fprintf (stderr, "%s: ", invocation_name);

  va_start (arg_ptr, format);
  vfprintf (stderr, format, arg_ptr);
  va_end (arg_ptr);
  putc ('\n', stderr);
}

static void *
xmalloc (size_t n)
{
  void *p = malloc (n);
  if (!p)
    die ("out of core");
  return p;
}

static void *
xcalloc (size_t n, size_t m)
{
  void *p = calloc (n, m);
  if (!p)
    die ("out of core");
  return p;
}

static char *
xstrdup (const char *s)
{
  char *p = xmalloc (strlen (s)+1);
  strcpy (p, s);
  return p;
}


/* Write LENGTH bytes from BUFFER to FD. */
static int
writen (int fd, const char *buffer, size_t length)
{
  while (length)
    {
      int nwritten = write (fd, buffer, length);
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      if (nwritten < 0)
        {
          if (errno == EINTR)
            continue;
          return -1; /* write error */
        }
      length -= nwritten;
      buffer += nwritten;
    }
  return 0;  /* okay */
}




/* Assuan specific stuff. */

/* Read a line from FD, store it in the global recv_line, analyze the
   type and store that in recv_type.  The function terminates on a
   communication error.  Returns a pointer into the inputline to the
   first byte of the arguments.  The parsing is very strict to match
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   exaclty what we want to send. */
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static char *
read_assuan (int fd)
{
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  /* FIXME: For general robustness, the pending stuff needs to be
     associated with FD.  */
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  static char pending[MAX_LINELEN];
  static size_t pending_len;
  size_t nleft = sizeof recv_line;
  char *buf = recv_line;
  char *p;

  while (nleft > 0)
    {
      int n;

      if (pending_len)
        {
          if (pending_len >= nleft)
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            die_0 ("received line too large");
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          memcpy (buf, pending, pending_len);
          n = pending_len;
          pending_len = 0;
        }
      else
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        {
          do
            {
              n = read (fd, buf, nleft);
            }
          while (n < 0 && errno == EINTR);
        }
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      if (opt_verbose && n >= 0 )
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	{
	  int i;
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	  printf ("%s: read \"", __func__);
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	  for (i = 0; i < n; i ++)
	    putc (buf[i], stdout);
	  printf ("\"\n");
	}

      if (n < 0)
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        die_2 ("reading fd %d failed: %s", fd, strerror (errno));
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      else if (!n)
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        die_1 ("received incomplete line on fd %d", fd);
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      p = buf;
      nleft -= n;
      buf += n;
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      for (; n && *p != '\n'; n--, p++)
        ;
      if (n)
        {
          if (n>1)
            {
              n--;
              memcpy (pending, p + 1, n);
              pending_len = n;
            }
	  *p = '\0';
          break;
        }
    }
  if (!nleft)
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    die_0 ("received line too large");
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  p = recv_line;
  if (p[0] == 'O' && p[1] == 'K' && (p[2] == ' ' || !p[2]))
    {
      recv_type = LINE_OK;
      p += 3;
    }
  else if (p[0] == 'E' && p[1] == 'R' && p[2] == 'R'
           && (p[3] == ' ' || !p[3]))
    {
      recv_type = LINE_ERR;
      p += 4;
    }
  else if (p[0] == 'S' && (p[1] == ' ' || !p[1]))
    {
      recv_type = LINE_STAT;
      p += 2;
    }
  else if (p[0] == 'D' && p[1] == ' ')
    {
      recv_type = LINE_DATA;
      p += 2;
    }
  else if (p[0] == 'E' && p[1] == 'N' &&  p[2] == 'D' && !p[3])
    {
      recv_type = LINE_END;
      p += 3;
    }
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  else
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    die_1 ("invalid line type (%.5s)", p);
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  return p;
}

/* Write LINE to the server using FD.  It is expected that the line
   contains the terminating linefeed as last character. */
static void
write_assuan (int fd, const char *line)
{
  char buffer[1026];
  size_t n = strlen (line);

  if (n > 1024)
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    die_0 ("line too long for Assuan protocol");
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  strcpy (buffer, line);
  if (!n || buffer[n-1] != '\n')
    buffer[n++] = '\n';

  if (writen (fd, buffer, n))
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      die_3 ("sending line (\"%s\") to %d failed: %s", buffer, fd,
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	   strerror (errno));
}


/* Start the server with path PGMNAME and connect its stdout and
   strerr to a newly created pipes; the file descriptors are then
   store in the gloabl variables SERVER_SEND_FD and
   SERVER_RECV_FD. The initial handcheck is performed.*/
static void
start_server (const char *pgmname)
{
  int rp[2];
  int wp[2];
  pid_t pid;

  if (pipe (rp) < 0)
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    die_1 ("pipe creation failed: %s", strerror (errno));
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  if (pipe (wp) < 0)
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    die_1 ("pipe creation failed: %s", strerror (errno));
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  fflush (stdout);
  fflush (stderr);
  pid = fork ();
  if (pid < 0)
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    die_0 ("fork failed");
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  if (!pid)
    {
      const char *arg0;

      arg0 = strrchr (pgmname, '/');
      if (arg0)
        arg0++;
      else
        arg0 = pgmname;

      if (wp[0] != STDIN_FILENO)
        {
          if (dup2 (wp[0], STDIN_FILENO) == -1)
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            die_1 ("dup2 failed in child: %s", strerror (errno));
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          close (wp[0]);
        }
      if (rp[1] != STDOUT_FILENO)
        {
          if (dup2 (rp[1], STDOUT_FILENO) == -1)
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            die_1 ("dup2 failed in child: %s", strerror (errno));
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          close (rp[1]);
        }
      if (!opt_verbose)
        {
	  int fd = open ("/dev/null", O_WRONLY);
	  if (fd == -1)
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	    die_1 ("can't open '/dev/null': %s", strerror (errno));
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          if (dup2 (fd, STDERR_FILENO) == -1)
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            die_1 ("dup2 failed in child: %s", strerror (errno));
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	  close (fd);
        }

      close (wp[1]);
      close (rp[0]);
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      execl (pgmname, arg0, "--server", NULL);
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      die_2 ("exec failed for '%s': %s", pgmname, strerror (errno));
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    }
  close (wp[0]);
  close (rp[1]);
  server_send_fd = wp[1];
  server_recv_fd = rp[0];

  read_assuan (server_recv_fd);
  if (recv_type != LINE_OK)
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    die_0 ("no greating message");
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}





/* Script intepreter. */

static void
unset_var (const char *name)
{
  VARIABLE var;

  for (var=variable_list; var && strcmp (var->name, name); var = var->next)
    ;
  if (!var)
    return;
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/*    fprintf (stderr, "unsetting '%s'\n", name); */
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  if (var->type == VARTYPE_FD && var->value)
    {
      int fd;

      fd = atoi (var->value);
      if (fd != -1 && fd != 0 && fd != 1 && fd != 2)
          close (fd);
    }

  free (var->value);
  var->value = NULL;
  var->type = 0;
  var->count = 0;
}


static void
set_type_var (const char *name, const char *value, VARTYPE type)
{
  VARIABLE var;

  if (!name)
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    name = "?";
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  for (var=variable_list; var && strcmp (var->name, name); var = var->next)
    ;
  if (!var)
    {
      var = xcalloc (1, sizeof *var + strlen (name));
      strcpy (var->name, name);
      var->next = variable_list;
      variable_list = var;
    }
  else
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    {
      free (var->value);
      var->value = NULL;
    }
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  if (var->type == VARTYPE_FD && var->value)
    {
      int fd;

      fd = atoi (var->value);
      if (fd != -1 && fd != 0 && fd != 1 && fd != 2)
          close (fd);
    }
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  var->type = type;
  var->count = 0;
  if (var->type == VARTYPE_COUNTER)
    {
      /* We need some extra sapce as scratch area for get_var. */
      var->value = xmalloc (strlen (value) + 1 + 20);
      strcpy (var->value, value);
    }
  else
    var->value = xstrdup (value);
}

static void
set_var (const char *name, const char *value)
{
  set_type_var (name, value, 0);
}


static const char *
get_var (const char *name)
{
  VARIABLE var;

  for (var=variable_list; var && strcmp (var->name, name); var = var->next)
    ;
  if (!var)
    return NULL;
  if (var->type == VARTYPE_COUNTER && var->value)
    { /* Use the scratch space allocated by set_var. */
      char *p = var->value + strlen(var->value)+1;
      sprintf (p, "%u", var->count);
      return p;
    }
  else
    return var->value;
}


/* Incremente all counter type variables with NAME in their VALUE. */
static void
inc_counter (const char *name)
{
  VARIABLE var;

  if (!*name)
    return;
  for (var=variable_list; var; var = var->next)
    {
      if (var->type == VARTYPE_COUNTER
          && var->value && !strcmp (var->value, name))
        var->count++;
    }
}


/* Expand variables in LINE and return a new allocated buffer if
   required.  The function might modify LINE if the expanded version
   fits into it. */
static char *
expand_line (char *buffer)
{
  char *line = buffer;
  char *p, *pend;
  const char *value;
  size_t valuelen, n;
  char *result = NULL;

  while (*line)
    {
      p = strchr (line, '$');
      if (!p)
        return result; /* nothing more to expand */
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      if (p[1] == '$') /* quoted */
        {
          memmove (p, p+1, strlen (p+1)+1);
          line = p + 1;
          continue;
        }
      for (pend=p+1; *pend && !spacep (pend)
           && *pend != '$' && *pend != '/'; pend++)
        ;
      if (*pend)
        {
          int save = *pend;
          *pend = 0;
          value = get_var (p+1);
          *pend = save;
        }
      else
        value = get_var (p+1);
      if (!value)
        value = "";
      valuelen = strlen (value);
      if (valuelen <= pend - p)
        {
          memcpy (p, value, valuelen);
          p += valuelen;
          n = pend - p;
          if (n)
            memmove (p, p+n, strlen (p+n)+1);
          line = p;
        }
      else
        {
          char *src = result? result : buffer;
          char *dst;

          dst = xmalloc (strlen (src) + valuelen + 1);
          n = p - src;
          memcpy (dst, src, n);
          memcpy (dst + n, value, valuelen);
          n += valuelen;
          strcpy (dst + n, pend);
          line = dst + n;
          free (result);
          result = dst;
        }
    }
  return result;
}


/* Evaluate COND and return the result. */
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static int
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eval_boolean (const char *cond)
{
  int true = 1;

  for ( ; *cond == '!'; cond++)
    true = !true;
  if (!*cond || (*cond == '0' && !cond[1]))
    return !true;
  return true;
}





static void
cmd_let (const char *assign_to, char *arg)
{
  set_var (assign_to, arg);
}


static void
cmd_echo (const char *assign_to, char *arg)
{
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  (void)assign_to;
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  if (!opt_no_echo)
    printf ("%s\n", arg);
}

static void
cmd_send (const char *assign_to, char *arg)
{
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  (void)assign_to;
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  if (opt_verbose)
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    fprintf (stderr, "sending '%s'\n", arg);
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  write_assuan (server_send_fd, arg);
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}

static void
handle_status_line (char *arg)
{
  char *p;

  for (p=arg; *p && !spacep (p); p++)
    ;
  if (*p)
    {
      int save = *p;
      *p = 0;
      inc_counter (arg);
      *p = save;
    }
  else
    inc_counter (arg);
}

static void
cmd_expect_ok (const char *assign_to, char *arg)
{
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  (void)assign_to;
  (void)arg;

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  if (opt_verbose)
    fprintf (stderr, "expecting OK\n");
  do
    {
      char *p = read_assuan (server_recv_fd);
      if (opt_verbose > 1)
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        fprintf (stderr, "got line '%s'\n", recv_line);
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      if (recv_type == LINE_STAT)
        handle_status_line (p);
    }
  while (recv_type != LINE_OK && recv_type != LINE_ERR);
  if (recv_type != LINE_OK)
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    die_1 ("expected OK but got '%s'", recv_line);
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}

static void
cmd_expect_err (const char *assign_to, char *arg)
{
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  (void)assign_to;
  (void)arg;

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  if (opt_verbose)
    fprintf (stderr, "expecting ERR\n");
  do
    {
      char *p = read_assuan (server_recv_fd);
      if (opt_verbose > 1)
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        fprintf (stderr, "got line '%s'\n", recv_line);
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      if (recv_type == LINE_STAT)
        handle_status_line (p);
    }
  while (recv_type != LINE_OK && recv_type != LINE_ERR);
  if (recv_type != LINE_ERR)
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    die_1 ("expected ERR but got '%s'", recv_line);
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}

static void
cmd_count_status (const char *assign_to, char *arg)
{
  char *p;

  if (!*assign_to || !*arg)
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    die_0 ("syntax error: count-status requires an argument and a variable");
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  for (p=arg; *p && !spacep (p); p++)
    ;
  if (*p)
    {
      for (*p++ = 0; spacep (p); p++)
        ;
      if (*p)
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        die_0 ("cmpfiles: syntax error");
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    }
  set_type_var (assign_to, arg, VARTYPE_COUNTER);
}

static void
cmd_openfile (const char *assign_to, char *arg)
{
  int fd;
  char numbuf[20];

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  do
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    fd = open (arg, O_RDONLY);
  while (fd == -1 && errno == EINTR);
  if (fd == -1)
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    die_2 ("error opening '%s': %s", arg, strerror (errno));
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  sprintf (numbuf, "%d", fd);
  set_type_var (assign_to, numbuf, VARTYPE_FD);
}

static void
cmd_createfile (const char *assign_to, char *arg)
{
  int fd;
  char numbuf[20];

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  do
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    fd = open (arg, O_WRONLY|O_CREAT|O_TRUNC, 0666);
  while (fd == -1 && errno == EINTR);
  if (fd == -1)
802
    die_2 ("error creating '%s': %s", arg, strerror (errno));
803 804 805 806 807 808 809 810 811

  sprintf (numbuf, "%d", fd);
  set_type_var (assign_to, numbuf, VARTYPE_FD);
}


static void
cmd_pipeserver (const char *assign_to, char *arg)
{
812 813
  (void)assign_to;

814
  if (!*arg)
815
    die_0 ("syntax error: servername missing");
816 817 818 819 820 821 822 823

  start_server (arg);
}


static void
cmd_quit_if(const char *assign_to, char *arg)
{
824 825
  (void)assign_to;

826 827 828 829 830 831 832
  if (eval_boolean (arg))
    exit (0);
}

static void
cmd_fail_if(const char *assign_to, char *arg)
{
833 834
  (void)assign_to;

835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850
  if (eval_boolean (arg))
    exit (1);
}


static void
cmd_cmpfiles (const char *assign_to, char *arg)
{
  char *p = arg;
  char *second;
  FILE *fp1, *fp2;
  char buffer1[2048]; /* note: both must be of equal size. */
  char buffer2[2048];
  size_t nread1, nread2;
  int rc = 0;

851
  set_var (assign_to, "0");
852 853 854
  for (p=arg; *p && !spacep (p); p++)
    ;
  if (!*p)
855
    die_0 ("cmpfiles: syntax error");
856 857 858 859 860 861 862 863 864 865
  for (*p++ = 0; spacep (p); p++)
    ;
  second = p;
  for (; *p && !spacep (p); p++)
    ;
  if (*p)
    {
      for (*p++ = 0; spacep (p); p++)
        ;
      if (*p)
866
        die_0 ("cmpfiles: syntax error");
867
    }
868

869 870 871
  fp1 = fopen (arg, "rb");
  if (!fp1)
    {
872
      err ("can't open '%s': %s", arg, strerror (errno));
873 874 875 876 877
      return;
    }
  fp2 = fopen (second, "rb");
  if (!fp2)
    {
878
      err ("can't open '%s': %s", second, strerror (errno));
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      fclose (fp1);
      return;
    }
  while ( (nread1 = fread (buffer1, 1, sizeof buffer1, fp1)))
    {
      if (ferror (fp1))
        break;
      nread2 = fread (buffer2, 1, sizeof buffer2, fp2);
      if (ferror (fp2))
        break;
      if (nread1 != nread2 || memcmp (buffer1, buffer2, nread1))
        {
          rc = 1;
          break;
        }
    }
  if (feof (fp1) && feof (fp2) && !rc)
    {
      if (opt_verbose)
        err ("files match");
899
      set_var (assign_to, "1");
900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981
    }
  else if (!rc)
    err ("cmpfiles: read error: %s", strerror (errno));
  else
    err ("cmpfiles: mismatch");
  fclose (fp1);
  fclose (fp2);
}

static void
cmd_getenv (const char *assign_to, char *arg)
{
  const char *s;
  s = *arg? getenv (arg):"";
  set_var (assign_to, s? s:"");
}




/* Process the current script line LINE. */
static int
interpreter (char *line)
{
  static struct {
    const char *name;
    void (*fnc)(const char*, char*);
  } cmdtbl[] = {
    { "let"       , cmd_let },
    { "echo"      , cmd_echo },
    { "send"      , cmd_send },
    { "expect-ok" , cmd_expect_ok },
    { "expect-err", cmd_expect_err },
    { "count-status", cmd_count_status },
    { "openfile"  , cmd_openfile },
    { "createfile", cmd_createfile },
    { "pipeserver", cmd_pipeserver },
    { "quit"      , NULL },
    { "quit-if"   , cmd_quit_if },
    { "fail-if"   , cmd_fail_if },
    { "cmpfiles"  , cmd_cmpfiles },
    { "getenv"    , cmd_getenv },
    { NULL }
  };
  char *p, *save_p;
  int i, save_c;
  char *stmt = NULL;
  char *assign_to = NULL;
  char *must_free = NULL;

  for ( ;spacep (line); line++)
    ;
  if (!*line || *line == '#')
    return 0; /* empty or comment */
  p = expand_line (line);
  if (p)
    {
      must_free = p;
      line = p;
      for ( ;spacep (line); line++)
        ;
      if (!*line || *line == '#')
        {
          free (must_free);
          return 0; /* empty or comment */
        }
    }
  for (p=line; *p && !spacep (p) && *p != '='; p++)
    ;
  if (*p == '=')
    {
      *p = 0;
      assign_to = line;
    }
  else if (*p)
    {
      for (*p++ = 0; spacep (p); p++)
        ;
      if (*p == '=')
        assign_to = line;
    }
  if (!*line)
982
    die_0 ("syntax error");
983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011
  stmt = line;
  save_c = 0;
  save_p = NULL;
  if (assign_to)
    { /* this is an assignment */
      for (p++; spacep (p); p++)
        ;
      if (!*p)
        {
          unset_var (assign_to);
          free (must_free);
          return 0;
        }
      stmt = p;
      for (; *p && !spacep (p); p++)
        ;
      if (*p)
        {
          save_p = p;
          save_c = *p;
          for (*p++ = 0; spacep (p);  p++)
            ;
        }
    }
  for (i=0; cmdtbl[i].name && strcmp (stmt, cmdtbl[i].name); i++)
    ;
  if (!cmdtbl[i].name)
    {
      if (!assign_to)
1012
        die_1 ("invalid statement '%s'\n", stmt);
1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086
      if (save_p)
        *save_p = save_c;
      set_var (assign_to, stmt);
      free (must_free);
      return 0;
    }

  if (cmdtbl[i].fnc)
    cmdtbl[i].fnc (assign_to, p);
  free (must_free);
  return cmdtbl[i].fnc? 0:1;
}



int
main (int argc, char **argv)
{
  char buffer[2048];
  char *p, *pend;

  if (!argc)
    invocation_name = "asschk";
  else
    {
      invocation_name = *argv++;
      argc--;
      p = strrchr (invocation_name, '/');
      if (p)
        invocation_name = p+1;
    }


  set_var ("?","1"); /* defaults to true */

  for (; argc; argc--, argv++)
    {
      p = *argv;
      if (*p != '-')
        break;
      if (!strcmp (p, "--verbose"))
        opt_verbose++;
      else if (!strcmp (p, "--no-echo"))
        opt_no_echo++;
      else if (*p == '-' && p[1] == 'D')
        {
          p += 2;
          pend = strchr (p, '=');
          if (pend)
            {
              int tmp = *pend;
              *pend = 0;
              set_var (p, pend+1);
              *pend = tmp;
            }
          else
            set_var (p, "1");
        }
      else if (*p == '-' && p[1] == '-' && !p[2])
        {
          argc--; argv++;
          break;
        }
      else
        break;
    }
  if (argc)
    die ("usage: asschk [--verbose] {-D<name>[=<value>]}");


  while (fgets (buffer, sizeof buffer, stdin))
    {
      p = strchr (buffer,'\n');
      if (!p)
1087
        die_0 ("incomplete script line");
1088 1089 1090 1091 1092 1093 1094
      *p = 0;
      if (interpreter (buffer))
        break;
      fflush (stdout);
    }
  return 0;
}