306 lines
6.2 KiB
C
306 lines
6.2 KiB
C
/***********************************************************************/
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/* */
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/* Objective Caml */
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/* */
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/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
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/* */
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/* Copyright 1996 Institut National de Recherche en Informatique et */
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/* en Automatique. All rights reserved. This file is distributed */
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/* under the terms of the GNU Library General Public License, with */
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/* the special exception on linking described in file ../LICENSE. */
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/* */
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/***********************************************************************/
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/* $Id$ */
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/* Basic system calls */
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#include <errno.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <time.h>
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#if !macintosh
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#include <sys/types.h>
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#include <sys/stat.h>
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#endif
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#if !macintosh && !_WIN32
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#include <sys/wait.h>
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#endif
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#if macintosh
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#include "macintosh.h"
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#endif
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#include "config.h"
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#ifdef HAS_UNISTD
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#include <unistd.h>
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#endif
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#ifdef HAS_TIMES
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#include <sys/times.h>
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#endif
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#ifdef HAS_GETTIMEOFDAY
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#include <sys/time.h>
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#endif
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#include "alloc.h"
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#include "debugger.h"
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#include "fail.h"
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#include "instruct.h"
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#include "mlvalues.h"
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#include "signals.h"
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#include "stacks.h"
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#include "sys.h"
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#ifdef HAS_UI
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#include "ui.h"
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#endif
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#ifndef _WIN32
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extern int errno;
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#endif
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#ifdef HAS_STRERROR
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#ifndef _WIN32
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extern char * strerror(int);
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#endif
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char * error_message(void)
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{
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return strerror(errno);
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}
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#else
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extern int sys_nerr;
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extern char * sys_errlist [];
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char * error_message(void)
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{
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if (errno < 0 || errno >= sys_nerr)
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return "unknown error";
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else
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return sys_errlist[errno];
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}
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#endif /* HAS_STRERROR */
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#ifndef EAGAIN
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#define EAGAIN (-1)
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#endif
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#ifndef EWOULDBLOCK
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#define EWOULDBLOCK (-1)
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#endif
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CAMLexport void sys_error(value arg)
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{
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CAMLparam1 (arg);
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char * err;
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CAMLlocal1 (str);
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if (errno == EAGAIN || errno == EWOULDBLOCK) {
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raise_sys_blocked_io();
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} else {
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err = error_message();
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if (arg == NO_ARG) {
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str = copy_string(err);
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} else {
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int err_len = strlen(err);
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int arg_len = string_length(arg);
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str = alloc_string(arg_len + 2 + err_len);
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memmove(&Byte(str, 0), String_val(arg), arg_len);
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memmove(&Byte(str, arg_len), ": ", 2);
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memmove(&Byte(str, arg_len + 2), err, err_len);
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}
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raise_sys_error(str);
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}
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}
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CAMLprim value sys_exit(value retcode)
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{
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#ifndef NATIVE_CODE
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debugger(PROGRAM_EXIT);
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#endif
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#ifdef HAS_UI
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ui_exit(Int_val(retcode));
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#else
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exit(Int_val(retcode));
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#endif
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return Val_unit;
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}
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#ifndef O_BINARY
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#define O_BINARY 0
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#endif
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#ifndef O_TEXT
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#define O_TEXT 0
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#endif
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#ifndef O_NONBLOCK
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#ifdef O_NDELAY
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#define O_NONBLOCK O_NDELAY
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#else
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#define O_NONBLOCK 0
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#endif
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#endif
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static int sys_open_flags[] = {
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O_RDONLY, O_WRONLY, O_APPEND, O_CREAT, O_TRUNC, O_EXCL,
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O_BINARY, O_TEXT, O_NONBLOCK
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};
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CAMLprim value sys_open(value path, value flags, value perm)
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{
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int ret;
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ret = open(String_val(path), convert_flag_list(flags, sys_open_flags)
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#if !macintosh
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, Int_val(perm)
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#endif
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);
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if (ret == -1) sys_error(path);
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return Val_long(ret);
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}
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CAMLprim value sys_close(value fd)
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{
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close(Int_val(fd));
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return Val_unit;
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}
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CAMLprim value sys_file_exists(value name)
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{
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#if macintosh
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int f;
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f = open (String_val (name), O_RDONLY);
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if (f == -1) return (Val_bool (0));
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close (f);
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return (Val_bool (1));
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#else
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struct stat st;
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return Val_bool(stat(String_val(name), &st) == 0);
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#endif
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}
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CAMLprim value sys_remove(value name)
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{
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int ret;
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ret = unlink(String_val(name));
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if (ret != 0) sys_error(name);
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return Val_unit;
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}
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CAMLprim value sys_rename(value oldname, value newname)
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{
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if (rename(String_val(oldname), String_val(newname)) != 0)
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sys_error(oldname);
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return Val_unit;
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}
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CAMLprim value sys_chdir(value dirname)
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{
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if (chdir(String_val(dirname)) != 0) sys_error(dirname);
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return Val_unit;
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}
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CAMLprim value sys_getcwd(value unit)
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{
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char buff[4096];
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#ifdef HAS_GETCWD
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if (getcwd(buff, sizeof(buff)) == 0) sys_error(NO_ARG);
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#else
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if (getwd(buff) == 0) sys_error(NO_ARG);
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#endif /* HAS_GETCWD */
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return copy_string(buff);
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}
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CAMLprim value sys_getenv(value var)
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{
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char * res;
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res = getenv(String_val(var));
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if (res == 0) raise_not_found();
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return copy_string(res);
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}
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char ** caml_main_argv;
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CAMLprim value sys_get_argv(value unit)
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{
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return copy_string_array((char const **) caml_main_argv);
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}
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void sys_init(char **argv)
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{
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caml_main_argv = argv;
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}
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#if !(defined(WIFEXITED) && defined(WEXITSTATUS))
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/* Assume old-style V7 status word */
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#define WIFEXITED(status) (((status) & 0xFF) == 0)
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#define WEXITSTATUS(status) (((status) >> 8) & 0xFF)
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#endif
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#ifdef _WIN32
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extern int win32_system(char * command);
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#endif
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CAMLprim value sys_system_command(value command)
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{
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int status, retcode;
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enter_blocking_section ();
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#ifndef _WIN32
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status = system(String_val(command));
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if (WIFEXITED(status))
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retcode = WEXITSTATUS(status);
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else
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retcode = 255;
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#else
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status = retcode = win32_system(String_val(command));
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#endif
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leave_blocking_section ();
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if (status == -1) sys_error(command);
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return Val_int(retcode);
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}
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CAMLprim value sys_time(value unit)
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{
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#ifdef HAS_TIMES
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#ifndef CLK_TCK
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#ifdef HZ
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#define CLK_TCK HZ
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#else
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#define CLK_TCK 60
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#endif
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#endif
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struct tms t;
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times(&t);
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return copy_double((double)(t.tms_utime + t.tms_stime) / CLK_TCK);
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#else
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/* clock() is standard ANSI C */
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return copy_double((double)clock() / CLOCKS_PER_SEC);
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#endif
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}
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CAMLprim value sys_random_seed (value unit)
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{
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#ifdef HAS_GETTIMEOFDAY
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struct timeval tv;
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gettimeofday(&tv, NULL);
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return Val_int(tv.tv_sec ^ tv.tv_usec);
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#else
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return Val_int(time (NULL));
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#endif
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}
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CAMLprim value sys_get_config(value unit)
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{
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CAMLparam0 (); /* unit is unused */
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CAMLlocal2 (result, ostype);
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ostype = copy_string(OCAML_OS_TYPE);
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result = alloc_small (2, 0);
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Field(result, 0) = ostype;
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Field(result, 1) = Val_long (8 * sizeof(value));
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CAMLreturn (result);
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}
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