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ocaml/byterun/sys.c

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/***********************************************************************/
/* */
/* Objective Caml */
/* */
/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
/* */
/* Copyright 1996 Institut National de Recherche en Informatique et */
/* en Automatique. All rights reserved. This file is distributed */
/* under the terms of the GNU Library General Public License. */
/* */
/***********************************************************************/
/* $Id$ */
/* Basic system calls */
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#if !macintosh
#include <sys/types.h>
#include <sys/stat.h>
#endif
#if !macintosh && !_WIN32
#include <sys/wait.h>
#endif
#include "config.h"
#ifdef HAS_UNISTD
#include <unistd.h>
#endif
#ifdef HAS_TIMES
#include <sys/times.h>
#endif
#include "alloc.h"
#include "debugger.h"
#include "fail.h"
#include "instruct.h"
#include "mlvalues.h"
#include "signals.h"
#include "stacks.h"
#include "sys.h"
#ifdef HAS_UI
#include "ui.h"
#endif
extern int errno;
#ifdef HAS_STRERROR
extern char * strerror(int);
char * error_message(void)
{
return strerror(errno);
}
#else
extern int sys_nerr;
extern char * sys_errlist [];
char * error_message(void)
{
if (errno < 0 || errno >= sys_nerr)
return "unknown error";
else
return sys_errlist[errno];
}
#endif /* HAS_STRERROR */
#ifndef EAGAIN
#define EAGAIN (-1)
#endif
#ifndef EWOULDBLOCK
#define EWOULDBLOCK (-1)
#endif
void sys_error(value arg)
{
char * err;
value str;
if (errno == EAGAIN || errno == EWOULDBLOCK) {
raise_sys_blocked_io();
} else {
err = error_message();
if (arg == NO_ARG) {
str = copy_string(err);
} else {
int err_len = strlen(err);
int arg_len = string_length(arg);
Begin_root(arg);
str = alloc_string(arg_len + 2 + err_len);
End_roots();
bcopy(String_val(arg), &Byte(str, 0), arg_len);
bcopy(": ", &Byte(str, arg_len), 2);
bcopy(err, &Byte(str, arg_len + 2), err_len);
}
raise_sys_error(str);
}
}
value sys_exit(value retcode) /* ML */
{
#ifndef NATIVE_CODE
debugger(PROGRAM_EXIT);
#endif
#ifdef HAS_UI
ui_exit(Int_val(retcode));
#else
exit(Int_val(retcode));
#endif
return Val_unit;
}
#ifndef O_BINARY
#define O_BINARY 0
#endif
#ifndef O_TEXT
#define O_TEXT 0
#endif
#ifndef O_NONBLOCK
#ifdef O_NDELAY
#define O_NONBLOCK O_NDELAY
#else
#define O_NONBLOCK 0
#endif
#endif
static int sys_open_flags[] = {
O_RDONLY, O_WRONLY, O_APPEND, O_CREAT, O_TRUNC, O_EXCL,
O_BINARY, O_TEXT, O_NONBLOCK
};
value sys_open(value path, value flags, value perm) /* ML */
{
int ret;
ret = open(String_val(path), convert_flag_list(flags, sys_open_flags)
#if !macintosh
, Int_val(perm)
#endif
);
if (ret == -1) sys_error(path);
return Val_long(ret);
}
value sys_close(value fd) /* ML */
{
close(Int_val(fd));
return Val_unit;
}
value sys_file_exists(value name) /* ML */
{
#if macintosh
int f;
f = open (String_val (name), O_RDONLY);
if (f == -1) return (Val_bool (0));
close (f);
return (Val_bool (1));
#else
struct stat st;
return Val_bool(stat(String_val(name), &st) == 0);
#endif
}
value sys_remove(value name) /* ML */
{
int ret;
ret = unlink(String_val(name));
if (ret != 0) sys_error(name);
return Val_unit;
}
value sys_rename(value oldname, value newname) /* ML */
{
if (rename(String_val(oldname), String_val(newname)) != 0)
sys_error(oldname);
return Val_unit;
}
value sys_chdir(value dirname) /* ML */
{
if (chdir(String_val(dirname)) != 0) sys_error(dirname);
return Val_unit;
}
value sys_getcwd(value unit) /* ML */
{
char buff[4096];
#ifdef HAS_GETCWD
if (getcwd(buff, sizeof(buff)) == 0) sys_error(NO_ARG);
#else
if (getwd(buff) == 0) sys_error(NO_ARG);
#endif /* HAS_GETCWD */
return copy_string(buff);
}
value sys_getenv(value var) /* ML */
{
char * res;
res = getenv(String_val(var));
if (res == 0) raise_not_found();
return copy_string(res);
}
static char ** main_argv;
value sys_get_argv(value unit) /* ML */
{
return copy_string_array(main_argv);
}
void sys_init(char **argv)
{
main_argv = argv;
}
#if !(defined(WIFEXITED) && defined(WEXITSTATUS))
/* Assume old-style V7 status word */
#define WIFEXITED(status) (((status) & 0xFF) == 0)
#define WEXITSTATUS(status) (((status) >> 8) & 0xFF)
#endif
value sys_system_command(value command) /* ML */
{
int status, retcode;
#ifndef _WIN32
status = system(String_val(command));
if (WIFEXITED(status))
retcode = WEXITSTATUS(status);
else
retcode = 255;
#else
status = retcode = win32_system(String_val(command));
#endif
if (status == -1) sys_error(command);
return Val_int(retcode);
}
value sys_time(value unit) /* ML */
{
#ifdef HAS_TIMES
#ifndef CLK_TCK
#ifdef HZ
#define CLK_TCK HZ
#else
#define CLK_TCK 60
#endif
#endif
struct tms t;
times(&t);
return copy_double((double)(t.tms_utime + t.tms_stime) / CLK_TCK);
#else
/* clock() is standard ANSI C */
return copy_double((double)clock() / CLOCKS_PER_SEC);
#endif
}
value sys_date (value unit) /* ML */
{
return copy_double ((double) time (NULL));
}
value sys_get_config(value unit) /* ML */
{
value result;
value ostype;
ostype = copy_string(OCAML_OS_TYPE);
Begin_root(ostype);
result = alloc_small (2, 0);
Field(result, 0) = ostype;
Field(result, 1) = Val_long (8 * sizeof(value));
End_roots ();
return result;
}
/* Search path function */
#ifdef _WIN32
#define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)
char * searchpath(char * name)
{
char * fullname;
char * path;
char * p;
char * q;
struct stat st;
if (stat(name, &st) == 0) return name;
path = getenv("PATH");
if (path == NULL) return 0;
fullname = stat_alloc(strlen(name) + strlen(path) + 6);
strcpy(fullname, name);
strcat(fullname, ".exe");
if (stat(fullname, &st) == 0) return fullname;
for (p = name; *p != 0; p++) {
if (*p == '/' || *p == '\\' || *p == ':') return name;
}
while(1) {
for (p = fullname; *path != 0 && *path != ';'; p++, path++) *p = *path;
if (p != fullname && p[-1] != '\\') *p++ = '\\';
for (q = name; *q != 0; p++, q++) *p = *q;
*p = 0;
if (stat(fullname, &st) == 0 && S_ISREG(st.st_mode)) break;
strcpy(p, ".exe");
if (stat(fullname, &st) == 0 && S_ISREG(st.st_mode)) break;
if (*path == 0) return 0;
path++;
}
return fullname;
}
#elif macintosh
/* We don't need searchpath on the Macintosh because there are no #! scripts */
char *searchpath (char * name)
{
return name;
}
#else
#ifndef S_ISREG
#define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)
#endif
char * searchpath(char * name)
{
char * fullname;
char * path;
char * p;
char * q;
struct stat st;
for (p = name; *p != 0; p++) {
if (*p == '/') return name;
}
path = getenv("PATH");
if (path == NULL) return 0;
fullname = stat_alloc(strlen(name) + strlen(path) + 2);
while(1) {
for (p = fullname; *path != 0 && *path != ':'; p++, path++) *p = *path;
if (p != fullname) *p++ = '/';
for (q = name; *q != 0; p++, q++) *p = *q;
*p = 0;
if (stat(fullname, &st) == 0 && S_ISREG(st.st_mode)) break;
if (*path == 0) return 0;
path++;
}
return fullname;
}
#endif /* _WIN32, macintosh, ... */
/* Wrapper around "system" for Win32 */
#ifdef _WIN32
#include <ctype.h>
extern char * mktemp(char *);
int win32_system(char * cmdline)
{
#define MAX_CMD_LENGTH 256
char cmd[MAX_CMD_LENGTH + 16];
char template[9];
char * tempfile;
FILE * fd;
int len, i, j, k, retcode;
len = strlen(cmdline);
if (len < 1000) {
return system(cmdline);
} else {
/* Skip initial blanks, if any */
for (i = 0; cmdline[i] != 0 && isspace(cmdline[i]); i++) /*nothing*/;
/* Copy command name to buffer, stop at first blank */
for (j = 0; cmdline[i] != 0 && ! isspace(cmdline[i]); i++) {
if (j < MAX_CMD_LENGTH) cmd[j++] = cmdline[i];
}
/* Save remainder of command line to temp file */
strcpy(template, "cmXXXXXX");
tempfile = mktemp(template);
fd = fopen(tempfile, "w");
if (fd == NULL) return -1;
for (k = i; k < len; k++)
fputc((isspace(cmdline[k]) ? '\n' : cmdline[k]), fd);
fclose(fd);
/* Add " @tempfile" to the command line */
sprintf(cmd + j, " @%s", tempfile);
/* Run command */
retcode = system(cmd);
/* Remove temp file and exit */
unlink(tempfile);
return retcode;
}
}
#endif
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