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/***********************************************************************/
/* */
/* Caml Special Light */
/* */
/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
/* */
/* Copyright 1995 Institut National de Recherche en Informatique et */
/* Automatique. Distributed only by permission. */
/* */
/***********************************************************************/
/* $Id$ */
/* Basic system calls */
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "config.h"
#ifdef HAS_UNISTD
#include <unistd.h>
#endif
#include "alloc.h"
#include "fail.h"
#include "instruct.h"
#include "mlvalues.h"
#include "signals.h"
#include "stacks.h"
#ifdef HAS_UI
#include "ui.h"
#endif
extern int errno;
#ifdef HAS_STRERROR
extern char * strerror();
char * error_message()
{
return strerror(errno);
}
#else
extern int sys_nerr;
extern char * sys_errlist [];
char * error_message()
{
if (errno < 0 || errno >= sys_nerr)
return "unknown error";
else
return sys_errlist[errno];
}
#endif /* HAS_STRERROR */
void sys_error(arg)
char * arg;
{
char * err = error_message();
int err_len = strlen(err);
int arg_len;
value str;
if (arg == NULL) {
str = alloc_string(err_len);
bcopy(err, &Byte(str, 0), err_len);
} else {
arg_len = strlen(arg);
str = alloc_string(arg_len + 2 + err_len);
bcopy(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(retcode) /* ML */
value retcode;
{
#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(path, flags, perm) /* ML */
value path, flags, perm;
{
int ret;
ret = open(String_val(path), convert_flag_list(flags, sys_open_flags),
Int_val(perm));
if (ret == -1) sys_error(String_val(path));
return Val_long(ret);
}
value sys_file_exists(name) /* ML */
value name;
{
struct stat st;
return Val_bool(stat(String_val(name), &st) == 0);
}
value sys_remove(name) /* ML */
value name;
{
int ret;
ret = unlink(String_val(name));
if (ret != 0) sys_error(String_val(name));
return Val_unit;
}
value sys_rename(oldname, newname) /* ML */
value oldname, newname;
{
if (rename(String_val(oldname), String_val(newname)) != 0)
sys_error(String_val(oldname));
return Val_unit;
}
value sys_chdir(dirname) /* ML */
value dirname;
{
if (chdir(String_val(dirname)) != 0) sys_error(String_val(dirname));
return Val_unit;
}
value sys_getcwd(unit) /* ML */
value unit;
{
char buff[4096];
#ifdef HAS_GETCWD
if (getcwd(buff, sizeof(buff)) == 0) sys_error(NULL);
#else
if (getwd(buff) == 0) sys_error(NULL);
#endif
return copy_string(buff);
}
value sys_getenv(var) /* ML */
value var;
{
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(unit) /* ML */
value unit;
{
return copy_string_array(main_argv);
}
void sys_init(argv)
char ** argv;
{
main_argv = argv;
}
value sys_system_command(command) /* ML */
value command;
{
int retcode = system(String_val(command));
if (retcode == -1) sys_error(String_val(command));
return Val_int(retcode);
}
/* Search path function */
#ifndef _WIN32
#ifndef S_ISREG
#define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)
#endif
char * searchpath(name)
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;
}
#else
char * searchpath(name)
char * name;
{
char * fullname;
char * path;
char * p;
char * q;
struct stat st;
for (p = name; *p != 0; p++) {
if (*p == '/' || *p == '\\' || *p == ':') return name;
}
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;
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) break;
strcpy(p, ".exe");
if (stat(fullname, &st) == 0) break;
if (*path == 0) return 0;
path++;
}
return fullname;
}
#endif
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