/* GNU m4 -- A simple macro processor
Copyright (C) 1999-2001, 2006-2010, 2013 Free Software Foundation,
Inc.
This file is part of GNU M4.
GNU M4 is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
GNU M4 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
along with this program. If not, see .
*/
#include
#include
#if TM_IN_SYS_TIME
# include
#else
# include
#endif
#include
/* Build using only the exported interfaces, unless NDEBUG is set, in
which case use private symbols to speed things up as much as possible. */
#ifndef NDEBUG
# include
#else
# include "m4private.h"
#endif
/* function macros blind side minargs maxargs */
#define builtin_functions \
BUILTIN (getcwd, false, false, false, 0, 0 ) \
BUILTIN (getenv, false, true, false, 1, 1 ) \
BUILTIN (getlogin, false, false, false, 0, 0 ) \
BUILTIN (getpid, false, false, false, 0, 0 ) \
BUILTIN (getppid, false, false, false, 0, 0 ) \
BUILTIN (getuid, false, false, false, 0, 0 ) \
BUILTIN (getpwnam, false, true, false, 1, 1 ) \
BUILTIN (getpwuid, false, true, false, 1, 1 ) \
BUILTIN (hostname, false, false, false, 0, 0 ) \
BUILTIN (rand, false, false, false, 0, 0 ) \
BUILTIN (srand, false, false, false, 0, 1 ) \
BUILTIN (setenv, false, true, false, 2, 3 ) \
BUILTIN (unsetenv, false, true, false, 1, 1 ) \
BUILTIN (uname, false, false, false, 0, 0 ) \
#define BUILTIN(handler, macros, blind, side, min, max) M4BUILTIN (handler);
builtin_functions
#undef BUILTIN
static const m4_builtin m4_builtin_table[] =
{
#define BUILTIN(handler, macros, blind, side, min, max) \
M4BUILTIN_ENTRY (handler, #handler, macros, blind, side, min, max)
builtin_functions
#undef BUILTIN
{ NULL, NULL, 0, 0, 0 },
};
void
include_stdlib (m4 *context, m4_module *module, m4_obstack *obs)
{
m4_install_builtins (context, module, m4_builtin_table);
}
/**
* getcwd()
**/
M4BUILTIN_HANDLER (getcwd)
{
/* FIXME - Use gnulib module for arbitrary-length cwd. */
char buf[1024];
char *bp;
bp = getcwd (buf, sizeof buf);
if (bp != NULL) /* in case of error return null string */
m4_shipout_string (context, obs, buf, SIZE_MAX, false);
}
/**
* getenv(NAME)
**/
M4BUILTIN_HANDLER (getenv)
{
char *env;
env = getenv (M4ARG (1));
if (env != NULL)
m4_shipout_string (context, obs, env, SIZE_MAX, false);
}
/**
* setenv(NAME, VALUE, [OVERWRITE])
**/
M4BUILTIN_HANDLER (setenv)
{
int overwrite = 1;
if (argc >= 4)
if (!m4_numeric_arg (context, m4_arg_info (argv), M4ARG (3), M4ARGLEN (3),
&overwrite))
return;
/* TODO - error checking. */
setenv (M4ARG (1), M4ARG (2), overwrite);
}
/**
* unsetenv(NAME)
**/
M4BUILTIN_HANDLER (unsetenv)
{
/* TODO - error checking. */
unsetenv (M4ARG (1));
}
/**
* getlogin()
**/
M4BUILTIN_HANDLER (getlogin)
{
char *login;
login = getlogin ();
if (login != NULL)
m4_shipout_string (context, obs, login, SIZE_MAX, false);
}
/**
* getpid()
**/
M4BUILTIN_HANDLER (getpid)
{
m4_shipout_int (obs, getpid ());
}
/**
* getppid()
**/
M4BUILTIN_HANDLER (getppid)
{
m4_shipout_int (obs, getppid ());
}
/**
* getpwnam(NAME)
**/
M4BUILTIN_HANDLER (getpwnam)
{
struct passwd *pw;
pw = getpwnam (M4ARG (1));
if (pw != NULL)
{
m4_shipout_string (context, obs, pw->pw_name, SIZE_MAX, true);
obstack_1grow (obs, ',');
m4_shipout_string (context, obs, pw->pw_passwd, SIZE_MAX, true);
obstack_1grow (obs, ',');
m4_shipout_int (obs, pw->pw_uid);
obstack_1grow (obs, ',');
m4_shipout_int (obs, pw->pw_gid);
obstack_1grow (obs, ',');
m4_shipout_string (context, obs, pw->pw_gecos, SIZE_MAX, true);
obstack_1grow (obs, ',');
m4_shipout_string (context, obs, pw->pw_dir, SIZE_MAX, true);
obstack_1grow (obs, ',');
m4_shipout_string (context, obs, pw->pw_shell, SIZE_MAX, true);
}
}
/**
* getpwuid(UID)
**/
M4BUILTIN_HANDLER (getpwuid)
{
struct passwd *pw;
int uid;
if (!m4_numeric_arg (context, m4_arg_info (argv), M4ARG (1), M4ARGLEN (1),
&uid))
return;
pw = getpwuid (uid);
if (pw != NULL)
{
m4_shipout_string (context, obs, pw->pw_name, SIZE_MAX, true);
obstack_1grow (obs, ',');
m4_shipout_string (context, obs, pw->pw_passwd, SIZE_MAX, true);
obstack_1grow (obs, ',');
m4_shipout_int (obs, pw->pw_uid);
obstack_1grow (obs, ',');
m4_shipout_int (obs, pw->pw_gid);
obstack_1grow (obs, ',');
m4_shipout_string (context, obs, pw->pw_gecos, SIZE_MAX, true);
obstack_1grow (obs, ',');
m4_shipout_string (context, obs, pw->pw_dir, SIZE_MAX, true);
obstack_1grow (obs, ',');
m4_shipout_string (context, obs, pw->pw_shell, SIZE_MAX, true);
}
}
/**
* hostname()
**/
M4BUILTIN_HANDLER (hostname)
{
char buf[1024];
if (gethostname (buf, sizeof buf) < 0)
return;
m4_shipout_string (context, obs, buf, SIZE_MAX, false);
}
/**
* rand()
**/
M4BUILTIN_HANDLER (rand)
{
m4_shipout_int (obs, rand ());
}
/**
* srand()
**/
M4BUILTIN_HANDLER (srand)
{
int seed;
if (argc == 1)
seed = time (0L) * getpid ();
else
{
if (!m4_numeric_arg (context, m4_arg_info (argv), M4ARG (1),
M4ARGLEN (1), &seed))
return;
}
srand (seed);
}
/**
* uname()
**/
M4BUILTIN_HANDLER (uname)
{
struct utsname ut;
if (uname (&ut) == 0)
{
m4_shipout_string (context, obs, ut.sysname, SIZE_MAX, true);
obstack_1grow (obs, ',');
m4_shipout_string (context, obs, ut.nodename, SIZE_MAX, true);
obstack_1grow (obs, ',');
m4_shipout_string (context, obs, ut.release, SIZE_MAX, true);
obstack_1grow (obs, ',');
m4_shipout_string (context, obs, ut.version, SIZE_MAX, true);
obstack_1grow (obs, ',');
m4_shipout_string (context, obs, ut.machine, SIZE_MAX, true);
}
}
/**
* getuid()
**/
M4BUILTIN_HANDLER (getuid)
{
m4_shipout_int (obs, getuid ());
}