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sim_fio.c
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/* sim_fio.c: simulator file I/O library
Copyright (c) 1993-2008, Robert M Supnik
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
ROBERT M SUPNIK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Except as contained in this notice, the name of Robert M Supnik shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from Robert M Supnik.
03-Jun-11 MP Simplified VMS 64b support and made more portable
02-Feb-11 MP Added sim_fsize_ex and sim_fsize_name_ex returning t_addr
Added export of sim_buf_copy_swapped and sim_buf_swap_data
28-Jun-07 RMS Added VMS IA64 support (from Norm Lastovica)
10-Jul-06 RMS Fixed linux conditionalization (from Chaskiel Grundman)
15-May-06 RMS Added sim_fsize_name
21-Apr-06 RMS Added FreeBSD large file support (from Mark Martinec)
19-Nov-05 RMS Added OS/X large file support (from Peter Schorn)
16-Aug-05 RMS Fixed C++ declaration and cast problems
17-Jul-04 RMS Fixed bug in optimized sim_fread (reported by Scott Bailey)
26-May-04 RMS Optimized sim_fread (suggested by John Dundas)
02-Jan-04 RMS Split out from SCP
This library includes:
sim_finit - initialize package
sim_fopen - open file
sim_fread - endian independent read (formerly fxread)
sim_fwrite - endian independent write (formerly fxwrite)
sim_fseek - conditionally extended (>32b) seek (
sim_fseeko - extended seek (>32b if available)
sim_can_seek - test for seekable (regular file)
sim_fsize - get file size
sim_fsize_name - get file size of named file
sim_fsize_ex - get file size as a t_offset
sim_fsize_name_ex - get file size as a t_offset of named file
sim_buf_copy_swapped - copy data swapping elements along the way
sim_buf_swap_data - swap data elements inplace in buffer if needed
sim_byte_swap_data - swap data elements inplace in buffer
sim_shmem_open create or attach to a shared memory region
sim_shmem_close close a shared memory region
sim_chdir change working directory
sim_mkdir create a directory
sim_rmdir remove a directory
sim_getcwd get the current working directory
sim_copyfile copy a file
sim_filepath_parts expand and extract filename/path parts
sim_dirscan scan for a filename pattern
sim_get_filelist get a list of files matching a pattern
sim_free_filelist free a filelist
sim_print_filelist print the elements of a filelist
sim_fopen and sim_fseek are OS-dependent. The other routines are not.
sim_fsize is always a 32b routine (it is used only with small capacity random
access devices like fixed head disks and DECtapes).
*/
#define IN_SIM_FIO_C 1 /* Include from sim_fio.c */
#include "sim_defs.h"
t_bool sim_end; /* TRUE = little endian, FALSE = big endian */
t_bool sim_taddr_64; /* t_addr is > 32b and Large File Support available */
t_bool sim_toffset_64; /* Large File (>2GB) file I/O Support available */
#if defined(fprintf) /* Make sure to only use the C rtl stream I/O routines */
#undef fprintf
#undef fputs
#undef fputc
#endif
#ifndef MAX
#define MAX(a,b) (((a) >= (b)) ? (a) : (b))
#endif
#ifndef MIN
#define MIN(a,b) (((a) <= (b)) ? (a) : (b))
#endif
/* OS-independent, endian independent binary I/O package
For consistency, all binary data read and written by the simulator
is stored in little endian data order. That is, in a multi-byte
data item, the bytes are written out right to left, low order byte
to high order byte. On a big endian host, data is read and written
from high byte to low byte. Consequently, data written on a little
endian system must be byte reversed to be usable on a big endian
system, and vice versa.
These routines are analogs of the standard C runtime routines
fread and fwrite. If the host is little endian, or the data items
are size char, then the calls are passed directly to fread or
fwrite. Otherwise, these routines perform the necessary byte swaps.
Sim_fread swaps in place, sim_fwrite uses an intermediate buffer.
*/
int32 sim_finit (void)
{
union {int32 i; char c[sizeof (int32)]; } end_test;
end_test.i = 1; /* test endian-ness */
sim_end = (end_test.c[0] != 0);
sim_toffset_64 = (sizeof(t_offset) > sizeof(int32)); /* Large File (>2GB) support */
sim_taddr_64 = sim_toffset_64 && (sizeof(t_addr) > sizeof(int32));
return sim_end;
}
/* Copy little endian data to local buffer swapping if needed */
void sim_buf_swap_data (void *bptr, size_t size, size_t count)
{
if (sim_end || (count == 0) || (size == sizeof (char)))
return;
sim_byte_swap_data (bptr, size, count);
}
void sim_byte_swap_data (void *bptr, size_t size, size_t count)
{
uint32 j;
int32 k;
unsigned char by, *sptr, *dptr;
if (sim_end || (count == 0) || (size == sizeof (char)))
return;
for (j = 0, dptr = sptr = (unsigned char *) bptr; /* loop on items */
j < count; j++) {
for (k = (int32)(size - 1); k >= (((int32) size + 1) / 2); k--) {
by = *sptr; /* swap end-for-end */
*sptr++ = *(dptr + k);
*(dptr + k) = by;
}
sptr = dptr = dptr + size; /* next item */
}
}
size_t sim_fread (void *bptr, size_t size, size_t count, FILE *fptr)
{
size_t c;
if ((size == 0) || (count == 0)) /* check arguments */
return 0;
c = fread (bptr, size, count, fptr); /* read buffer */
if (sim_end || (size == sizeof (char)) || (c == 0)) /* le, byte, or err? */
return c; /* done */
sim_buf_swap_data (bptr, size, c);
return c;
}
void sim_buf_copy_swapped (void *dbuf, const void *sbuf, size_t size, size_t count)
{
size_t j;
int32 k;
const unsigned char *sptr = (const unsigned char *)sbuf;
unsigned char *dptr = (unsigned char *)dbuf;
if (sim_end || (size == sizeof (char))) {
memcpy (dptr, sptr, size * count);
return;
}
for (j = 0; j < count; j++) { /* loop on items */
for (k = (int32)(size - 1); k >= 0; k--)
*(dptr + k) = *sptr++;
dptr = dptr + size;
}
}
size_t sim_fwrite (const void *bptr, size_t size, size_t count, FILE *fptr)
{
size_t c, nelem, nbuf, lcnt, total;
int32 i;
const unsigned char *sptr;
unsigned char *sim_flip;
if ((size == 0) || (count == 0)) /* check arguments */
return 0;
if (sim_end || (size == sizeof (char))) /* le or byte? */
return fwrite (bptr, size, count, fptr); /* done */
sim_flip = (unsigned char *)malloc(FLIP_SIZE);
if (!sim_flip)
return 0;
nelem = FLIP_SIZE / size; /* elements in buffer */
nbuf = count / nelem; /* number buffers */
lcnt = count % nelem; /* count in last buf */
if (lcnt) nbuf = nbuf + 1;
else lcnt = nelem;
total = 0;
sptr = (const unsigned char *) bptr; /* init input ptr */
for (i = (int32)nbuf; i > 0; i--) { /* loop on buffers */
c = (i == 1)? lcnt: nelem;
sim_buf_copy_swapped (sim_flip, sptr, size, c);
sptr = sptr + size * count;
c = fwrite (sim_flip, size, c, fptr);
if (c == 0) {
free(sim_flip);
return total;
}
total = total + c;
}
free(sim_flip);
return total;
}
/* Forward Declaration */
t_offset sim_ftell (FILE *st);
/* Get file size */
t_offset sim_fsize_ex (FILE *fp)
{
t_offset pos, sz;
if (fp == NULL)
return 0;
pos = sim_ftell (fp);
if (sim_fseeko (fp, 0, SEEK_END))
return 0;
sz = sim_ftell (fp);
if (sim_fseeko (fp, pos, SEEK_SET))
return 0;
return sz;
}
t_offset sim_fsize_name_ex (const char *fname)
{
FILE *fp;
t_offset sz;
if ((fp = sim_fopen (fname, "rb")) == NULL)
return 0;
sz = sim_fsize_ex (fp);
fclose (fp);
return sz;
}
uint32 sim_fsize_name (const char *fname)
{
return (uint32)(sim_fsize_name_ex (fname));
}
uint32 sim_fsize (FILE *fp)
{
return (uint32)(sim_fsize_ex (fp));
}
t_bool sim_can_seek (FILE *fp)
{
struct stat statb;
if ((0 != fstat (fileno (fp), &statb)) ||
(0 == (statb.st_mode & S_IFREG)))
return FALSE;
return TRUE;
}
static char *_sim_expand_homedir (const char *file, char *dest, size_t dest_size)
{
uint8 *without_quotes = NULL;
uint32 dsize = 0;
errno = 0;
if (((*file == '"') && (file[strlen (file) - 1] == '"')) ||
((*file == '\'') && (file[strlen (file) - 1] == '\''))) {
without_quotes = (uint8*)malloc (strlen (file) + 1);
if (without_quotes == NULL)
return NULL;
if (SCPE_OK != sim_decode_quoted_string (file, without_quotes, &dsize)) {
free (without_quotes);
errno = EINVAL;
return NULL;
}
file = (const char*)without_quotes;
}
if (memcmp (file, "~/", 2) != 0)
strlcpy (dest, file, dest_size);
else {
char *cptr = getenv("HOME");
char *cptr2;
if (cptr == NULL) {
cptr = getenv("HOMEPATH");
cptr2 = getenv("HOMEDRIVE");
}
else
cptr2 = NULL;
if (cptr && (dest_size > strlen (cptr) + strlen (file) + 3))
snprintf(dest, dest_size, "%s%s%s%s", cptr2 ? cptr2 : "", cptr, strchr (cptr, '/') ? "/" : "\\", file + 2);
else
strlcpy (dest, file, dest_size);
while ((strchr (dest, '\\') != NULL) && ((cptr = strchr (dest, '/')) != NULL))
*cptr = '\\';
}
free (without_quotes);
return dest;
}
#if defined(_WIN32)
#include <direct.h>
#include <io.h>
#include <fcntl.h>
#else
#include <unistd.h>
#endif
int sim_stat (const char *fname, struct stat *stat_str)
{
char namebuf[PATH_MAX + 1];
if (NULL == _sim_expand_homedir (fname, namebuf, sizeof (namebuf)))
return -1;
return stat (namebuf, stat_str);
}
int sim_chdir(const char *path)
{
char pathbuf[PATH_MAX + 1];
if (NULL == _sim_expand_homedir (path, pathbuf, sizeof (pathbuf)))
return -1;
return chdir (pathbuf);
}
int sim_mkdir(const char *path)
{
char pathbuf[PATH_MAX + 1];
if (NULL == _sim_expand_homedir (path, pathbuf, sizeof (pathbuf)))
return -1;
#if defined(_WIN32)
return mkdir (pathbuf);
#else
return mkdir (pathbuf, 0777);
#endif
}
int sim_rmdir(const char *path)
{
char pathbuf[PATH_MAX + 1];
if (NULL == _sim_expand_homedir (path, pathbuf, sizeof (pathbuf)))
return -1;
return rmdir (pathbuf);
}
static void _sim_filelist_entry (const char *directory,
const char *filename,
t_offset FileSize,
const struct stat *filestat,
void *context)
{
char **filelist = *(char ***)context;
char FullPath[PATH_MAX + 1];
int listcount = 0;
snprintf (FullPath, sizeof (FullPath), "%s%s", directory, filename);
if (filelist != NULL) {
while (filelist[listcount++] != NULL);
--listcount;
}
filelist = (char **)realloc (filelist, (listcount + 2) * sizeof (*filelist));
filelist[listcount] = strdup (FullPath);
filelist[listcount + 1] = NULL;
*(char ***)context = filelist;
}
char **sim_get_filelist (const char *filename)
{
t_stat r;
char **filelist = NULL;
r = sim_dir_scan (filename, _sim_filelist_entry, &filelist);
if (r == SCPE_OK)
return filelist;
return NULL;
}
void sim_free_filelist (char ***pfilelist)
{
char **listp = *pfilelist;
if (listp == NULL)
return;
while (*listp != NULL)
free (*listp++);
free (*pfilelist);
*pfilelist = NULL;
}
void sim_print_filelist (char **filelist)
{
if (filelist == NULL)
return;
while (*filelist != NULL)
sim_printf ("%s\n", *filelist++);
}
/* OS-dependent routines */
/* Optimized file open */
FILE* sim_fopen (const char *file, const char *mode)
{
FILE *f;
char namebuf[PATH_MAX + 1];
if (NULL == _sim_expand_homedir (file, namebuf, sizeof (namebuf)))
return NULL;
#if defined (VMS)
f = fopen (namebuf, mode, "ALQ=32", "DEQ=4096",
"MBF=6", "MBC=127", "FOP=cbt,tef", "ROP=rah,wbh", "CTX=stm");
#elif (defined (__linux) || defined (__linux__) || defined (__hpux) || defined (_AIX)) && !defined (DONT_DO_LARGEFILE)
f = fopen64 (namebuf, mode);
#else
f = fopen (namebuf, mode);
#endif
return f;
}
#if !defined (DONT_DO_LARGEFILE)
/* 64b VMS */
#if ((defined (__ALPHA) || defined (__ia64)) && defined (VMS) && (__DECC_VER >= 60590001)) || \
((defined(__sun) || defined(__sun__)) && defined(_LARGEFILE_SOURCE))
#define S_SIM_IO_FSEEK_EXT_ 1
int sim_fseeko (FILE *st, t_offset offset, int whence)
{
return fseeko (st, (off_t)offset, whence);
}
t_offset sim_ftell (FILE *st)
{
return (t_offset)(ftello (st));
}
#endif
/* Alpha UNIX - natively 64b */
#if defined (__ALPHA) && defined (__unix__) /* Alpha UNIX */
#define S_SIM_IO_FSEEK_EXT_ 1
int sim_fseeko (FILE *st, t_offset offset, int whence)
{
return fseek (st, offset, whence);
}
t_offset sim_ftell (FILE *st)
{
return (t_offset)(ftell (st));
}
#endif
/* Windows */
#if defined (_WIN32)
#define S_SIM_IO_FSEEK_EXT_ 1
#include <sys/stat.h>
int sim_fseeko (FILE *st, t_offset offset, int whence)
{
return _fseeki64 (st, (__int64)offset, whence);
}
t_offset sim_ftell (FILE *st)
{
return (t_offset)_ftelli64 (st);
}
#endif /* end Windows */
/* Linux */
#if defined (__linux) || defined (__linux__) || defined (__hpux) || defined (_AIX)
#define S_SIM_IO_FSEEK_EXT_ 1
int sim_fseeko (FILE *st, t_offset xpos, int origin)
{
return fseeko64 (st, (off64_t)xpos, origin);
}
t_offset sim_ftell (FILE *st)
{
return (t_offset)(ftello64 (st));
}
#endif /* end Linux with LFS */
/* Apple OS/X */
#if defined (__APPLE__) || defined (__FreeBSD__) || defined(__NetBSD__) || defined (__OpenBSD__) || defined (__CYGWIN__)
#define S_SIM_IO_FSEEK_EXT_ 1
int sim_fseeko (FILE *st, t_offset xpos, int origin)
{
return fseeko (st, (off_t)xpos, origin);
}
t_offset sim_ftell (FILE *st)
{
return (t_offset)(ftello (st));
}
#endif /* end Apple OS/X */
#endif /* !DONT_DO_LARGEFILE */
/* Default: no OS-specific routine has been defined */
#if !defined (S_SIM_IO_FSEEK_EXT_)
int sim_fseeko (FILE *st, t_offset xpos, int origin)
{
return fseek (st, (long) xpos, origin);
}
t_offset sim_ftell (FILE *st)
{
return (t_offset)(ftell (st));
}
#endif
int sim_fseek (FILE *st, t_addr offset, int whence)
{
return sim_fseeko (st, (t_offset)offset, whence);
}
#if defined(_WIN32)
const char *
sim_get_os_error_text (int Error)
{
static char szMsgBuffer[2048];
DWORD dwStatus;
dwStatus = FormatMessageA (FORMAT_MESSAGE_FROM_SYSTEM|
FORMAT_MESSAGE_IGNORE_INSERTS, // __in DWORD dwFlags,
NULL, // __in_opt LPCVOID lpSource,
Error, // __in DWORD dwMessageId,
0, // __in DWORD dwLanguageId,
szMsgBuffer, // __out LPTSTR lpBuffer,
sizeof (szMsgBuffer) -1, // __in DWORD nSize,
NULL); // __in_opt va_list *Arguments
if (0 == dwStatus)
snprintf(szMsgBuffer, sizeof(szMsgBuffer) - 1, "Error Code: 0x%X", Error);
while (sim_isspace (szMsgBuffer[strlen (szMsgBuffer)-1]))
szMsgBuffer[strlen (szMsgBuffer) - 1] = '\0';
return szMsgBuffer;
}
t_stat sim_copyfile (const char *source_file, const char *dest_file, t_bool overwrite_existing)
{
char sourcename[PATH_MAX + 1], destname[PATH_MAX + 1];
if (NULL == _sim_expand_homedir (source_file, sourcename, sizeof (sourcename)))
return sim_messagef (SCPE_ARG, "Error Copying - Problem Parsing Source Filename '%s'\n", source_file);
if (NULL == _sim_expand_homedir (dest_file, destname, sizeof (destname)))
return sim_messagef (SCPE_ARG, "Error Copying - Problem Parsing Destination Filename '%s'\n", dest_file);
if (CopyFileA (sourcename, destname, !overwrite_existing))
return SCPE_OK;
return sim_messagef (SCPE_ARG, "Error Copying '%s' to '%s': %s\n", source_file, dest_file, sim_get_os_error_text (GetLastError ()));
}
static void _time_t_to_filetime (time_t ttime, FILETIME *filetime)
{
t_uint64 time64;
time64 = 134774; /* Days betwen Jan 1, 1601 and Jan 1, 1970 */
time64 *= 24; /* Hours */
time64 *= 3600; /* Seconds */
time64 += (t_uint64)ttime; /* include time_t seconds */
time64 *= 10000000; /* Convert seconds to 100ns units */
filetime->dwLowDateTime = (DWORD)time64;
filetime->dwHighDateTime = (DWORD)(time64 >> 32);
}
t_stat sim_set_file_times (const char *file_name, time_t access_time, time_t write_time)
{
char filename[PATH_MAX + 1];
FILETIME accesstime, writetime;
HANDLE hFile;
BOOL bStat;
_time_t_to_filetime (access_time, &accesstime);
_time_t_to_filetime (write_time, &writetime);
if (NULL == _sim_expand_homedir (file_name, filename, sizeof (filename)))
return sim_messagef (SCPE_ARG, "Error Setting File Times - Problem Source Filename '%s'\n", filename);
hFile = CreateFileA (filename, GENERIC_READ|GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if (hFile == INVALID_HANDLE_VALUE)
return sim_messagef (SCPE_ARG, "Can't open file '%s' to set it's times: %s\n", filename, sim_get_os_error_text (GetLastError ()));
bStat = SetFileTime (hFile, NULL, &accesstime, &writetime);
CloseHandle (hFile);
return bStat ? SCPE_OK : sim_messagef (SCPE_ARG, "Error setting file '%s' times: %s\n", filename, sim_get_os_error_text (GetLastError ()));
}
#include <io.h>
#include <direct.h>
int sim_set_fsize (FILE *fptr, t_addr size)
{
return _chsize(_fileno(fptr), (long)size);
}
int sim_set_fifo_nonblock (FILE *fptr)
{
return -1;
}
struct SHMEM {
HANDLE hMapping;
size_t shm_size;
void *shm_base;
char *shm_name;
};
t_stat sim_shmem_open (const char *name, size_t size, SHMEM **shmem, void **addr)
{
SYSTEM_INFO SysInfo;
t_bool AlreadyExists;
GetSystemInfo (&SysInfo);
*shmem = (SHMEM *)calloc (1, sizeof(**shmem));
if (*shmem == NULL)
return SCPE_MEM;
(*shmem)->shm_name = (char *)calloc (1, 1 + strlen (name));
if ((*shmem)->shm_name == NULL) {
free (*shmem);
*shmem = NULL;
return SCPE_MEM;
}
strcpy ((*shmem)->shm_name, name);
(*shmem)->hMapping = INVALID_HANDLE_VALUE;
(*shmem)->shm_size = size;
(*shmem)->shm_base = NULL;
(*shmem)->hMapping = CreateFileMappingA (INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE|SEC_COMMIT, 0, (DWORD)(size+SysInfo.dwPageSize), name);
if ((*shmem)->hMapping == INVALID_HANDLE_VALUE) {
DWORD LastError = GetLastError();
sim_shmem_close (*shmem);
*shmem = NULL;
return sim_messagef (SCPE_OPENERR, "Can't CreateFileMapping of a %u byte shared memory segment '%s' - LastError=0x%X\n", (unsigned int)size, name, (unsigned int)LastError);
}
AlreadyExists = (GetLastError () == ERROR_ALREADY_EXISTS);
(*shmem)->shm_base = MapViewOfFile ((*shmem)->hMapping, FILE_MAP_ALL_ACCESS, 0, 0, 0);
if ((*shmem)->shm_base == NULL) {
DWORD LastError = GetLastError();
sim_shmem_close (*shmem);
*shmem = NULL;
return sim_messagef (SCPE_OPENERR, "Can't MapViewOfFile() of a %u byte shared memory segment '%s' - LastError=0x%X\n", (unsigned int)size, name, (unsigned int)LastError);
}
if (AlreadyExists) {
if (*((DWORD *)((*shmem)->shm_base)) == 0)
Sleep (50);
if (*((DWORD *)((*shmem)->shm_base)) != (DWORD)size) {
DWORD SizeFound = *((DWORD *)((*shmem)->shm_base));
sim_shmem_close (*shmem);
*shmem = NULL;
return sim_messagef (SCPE_OPENERR, "Shared Memory segment '%s' is %u bytes instead of %d\n", name, (unsigned int)SizeFound, (int)size);
}
}
else
*((DWORD *)((*shmem)->shm_base)) = (DWORD)size; /* Save Size in first page */
*addr = ((char *)(*shmem)->shm_base + SysInfo.dwPageSize); /* Point to the second paget for data */
return SCPE_OK;
}
void sim_shmem_close (SHMEM *shmem)
{
if (shmem == NULL)
return;
if (shmem->shm_base != NULL)
UnmapViewOfFile (shmem->shm_base);
if (shmem->hMapping != INVALID_HANDLE_VALUE)
CloseHandle (shmem->hMapping);
free (shmem->shm_name);
free (shmem);
}
int32 sim_shmem_atomic_add (int32 *p, int32 v)
{
return InterlockedExchangeAdd ((volatile long *) p,v) + (v);
}
t_bool sim_shmem_atomic_cas (int32 *ptr, int32 oldv, int32 newv)
{
return (InterlockedCompareExchange ((LONG volatile *) ptr, newv, oldv) == oldv);
}
#else /* !defined(_WIN32) */
#include <unistd.h>
int sim_set_fsize (FILE *fptr, t_addr size)
{
return ftruncate(fileno(fptr), (off_t)size);
}
#include <sys/stat.h>
#include <fcntl.h>
#if defined (HAVE_UTIME)
#include <utime.h>
#endif
const char *
sim_get_os_error_text (int Error)
{
return strerror (Error);
}
t_stat sim_copyfile (const char *source_file, const char *dest_file, t_bool overwrite_existing)
{
FILE *fIn = NULL, *fOut = NULL;
t_stat st = SCPE_OK;
char *buf = NULL;
size_t bytes;
fIn = sim_fopen (source_file, "rb");
if (!fIn) {
st = sim_messagef (SCPE_ARG, "Can't open '%s' for input: %s\n", source_file, strerror (errno));
goto Cleanup_Return;
}
fOut = sim_fopen (dest_file, "wb");
if (!fOut) {
st = sim_messagef (SCPE_ARG, "Can't open '%s' for output: %s\n", dest_file, strerror (errno));
goto Cleanup_Return;
}
buf = (char *)malloc (BUFSIZ);
while ((bytes = fread (buf, 1, BUFSIZ, fIn)))
fwrite (buf, 1, bytes, fOut);
Cleanup_Return:
free (buf);
if (fIn)
fclose (fIn);
if (fOut)
fclose (fOut);
#if defined(HAVE_UTIME)
if (st == SCPE_OK) {
struct stat statb;
if (!sim_stat (source_file, &statb)) {
struct utimbuf utim;
utim.actime = statb.st_atime;
utim.modtime = statb.st_mtime;
if (utime (dest_file, &utim))
st = SCPE_IOERR;
}
else
st = SCPE_IOERR;
}
#endif
return st;
}
t_stat sim_set_file_times (const char *file_name, time_t access_time, time_t write_time)
{
t_stat st = SCPE_IOERR;
#if defined (HAVE_UTIME)
struct utimbuf utim;
utim.actime = access_time;
utim.modtime = write_time;
if (!utime (file_name, &utim))
st = SCPE_OK;
#else
st = SCPE_NOFNC;
#endif
return st;
}
int sim_set_fifo_nonblock (FILE *fptr)
{
struct stat stbuf;
if (!fptr || fstat (fileno(fptr), &stbuf))
return -1;
#if defined(S_IFIFO) && defined(O_NONBLOCK)
if ((stbuf.st_mode & S_IFIFO)) {
int flags = fcntl(fileno(fptr), F_GETFL, 0);
return fcntl(fileno(fptr), F_SETFL, flags | O_NONBLOCK);
}
#endif
return -1;
}
#if defined (__linux__) || defined (__APPLE__) || defined (__CYGWIN__) || defined (__FreeBSD__) || defined(__NetBSD__) || defined (__OpenBSD__)
#if defined (HAVE_SHM_OPEN)
#include <sys/mman.h>
#endif
struct SHMEM {
int shm_fd;
size_t shm_size;
void *shm_base;
char *shm_name;
};
t_stat sim_shmem_open (const char *name, size_t size, SHMEM **shmem, void **addr)
{
#if defined (HAVE_SHM_OPEN) && defined (__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4)
*shmem = (SHMEM *)calloc (1, sizeof(**shmem));
mode_t orig_mask;
*addr = NULL;
if (*shmem == NULL)
return SCPE_MEM;
(*shmem)->shm_name = (char *)calloc (1, 1 + strlen (name) + ((*name != '/') ? 1 : 0));
if ((*shmem)->shm_name == NULL) {
free (*shmem);
*shmem = NULL;
return SCPE_MEM;
}
sprintf ((*shmem)->shm_name, "%s%s", ((*name != '/') ? "/" : ""), name);
(*shmem)->shm_base = MAP_FAILED;
(*shmem)->shm_size = size;
(*shmem)->shm_fd = shm_open ((*shmem)->shm_name, O_RDWR, 0);
if ((*shmem)->shm_fd == -1) {
int last_errno;
orig_mask = umask (0000);
(*shmem)->shm_fd = shm_open ((*shmem)->shm_name, O_CREAT | O_RDWR, 0660);
last_errno = errno;
umask (orig_mask); /* Restore original mask */
if ((*shmem)->shm_fd == -1) {
sim_shmem_close (*shmem);
*shmem = NULL;
return sim_messagef (SCPE_OPENERR, "Can't shm_open() a %d byte shared memory segment '%s' - errno=%d - %s\n", (int)size, name, last_errno, strerror (last_errno));
}
if (ftruncate((*shmem)->shm_fd, size)) {
sim_shmem_close (*shmem);
*shmem = NULL;
return SCPE_OPENERR;
}
}
else {
struct stat statb;
if ((fstat ((*shmem)->shm_fd, &statb)) ||
((size_t)statb.st_size != (*shmem)->shm_size)) {
sim_shmem_close (*shmem);
*shmem = NULL;
return sim_messagef (SCPE_OPENERR, "Shared Memory segment '%s' is %d bytes instead of %d\n", name, (int)(statb.st_size), (int)size);
}
}
(*shmem)->shm_base = mmap(NULL, (*shmem)->shm_size, PROT_READ | PROT_WRITE, MAP_SHARED, (*shmem)->shm_fd, 0);
if ((*shmem)->shm_base == MAP_FAILED) {
int last_errno = errno;
sim_shmem_close (*shmem);
*shmem = NULL;
return sim_messagef (SCPE_OPENERR, "Shared Memory '%s' mmap() failed. errno=%d - %s\n", name, last_errno, strerror (last_errno));
}
*addr = (*shmem)->shm_base;
return SCPE_OK;
#else
*shmem = NULL;
return sim_messagef (SCPE_NOFNC, "Shared memory not available - Missing shm_open() API\n");
#endif
}
void sim_shmem_close (SHMEM *shmem)
{
#if defined (HAVE_SHM_OPEN)
if (shmem == NULL)
return;
if (shmem->shm_base != MAP_FAILED)
munmap (shmem->shm_base, shmem->shm_size);
if (shmem->shm_fd != -1) {
shm_unlink (shmem->shm_name);
close (shmem->shm_fd);
}
free (shmem->shm_name);
free (shmem);
#endif
}
int32 sim_shmem_atomic_add (int32 *p, int32 v)
{
#if defined (__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4)
return __sync_add_and_fetch ((int *) p, v);
#else
return *p + v;
#endif
}
t_bool sim_shmem_atomic_cas (int32 *ptr, int32 oldv, int32 newv)
{
#if defined (__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4)
return __sync_bool_compare_and_swap (ptr, oldv, newv);
#else
if (*ptr == oldv) {
*ptr = newv;
return 1;
}
else
return 0;
#endif
}
#else /* !(defined (__linux__) || defined (__APPLE__)) */
t_stat sim_shmem_open (const char *name, size_t size, SHMEM **shmem, void **addr)
{
return SCPE_NOFNC;
}
void sim_shmem_close (SHMEM *shmem)
{
}
int32 sim_shmem_atomic_add (int32 *p, int32 v)
{
return -1;
}
t_bool sim_shmem_atomic_cas (int32 *ptr, int32 oldv, int32 newv)
{
return FALSE;
}
#endif /* defined (__linux__) || defined (__APPLE__) */
#endif /* defined (_WIN32) */
#if defined(__VAX)
/*
* We privide a 'basic' snprintf, which 'might' overrun a buffer, but
* the actual use cases don't on other platforms and none of the callers
* care about the function return value.
*/
int sim_vax_snprintf(char *buf, size_t buf_size, const char *fmt, ...)
{
va_list arglist;
va_start (arglist, fmt);
vsprintf (buf, fmt, arglist);
va_end (arglist);
return 0;
}
#endif
char *sim_getcwd (char *buf, size_t buf_size)
{
#if defined (VMS)
return getcwd (buf, buf_size, 0);
#else
return getcwd (buf, buf_size);
#endif
}
/*
* Parsing and expansion of file names.
*
* %~I% - expands filepath value removing any surrounding quotes (" or ')
* %~fI% - expands filepath value to a fully qualified path name
* %~pI% - expands filepath value to a path only
* %~nI% - expands filepath value to a file name only
* %~xI% - expands filepath value to a file extension only
*
* The modifiers can be combined to get compound results:
*
* %~pnI% - expands filepath value to a path and name only
* %~nxI% - expands filepath value to a file name and extension only
*
* In the above example above %I% can be replaced by other
* environment variables or numeric parameters to a DO command
* invocation.
*/
char *sim_filepath_parts (const char *filepath, const char *parts)
{
size_t tot_len = 0, tot_size = 0;
char *fullpath = NULL, *result = NULL;
char *c, *name, *ext;
char chr;
const char *p;
char filesizebuf[32] = "";
char filedatetimebuf[32] = "";
char namebuf[PATH_MAX + 1];
/* Expand ~/ home directory */
if (NULL == _sim_expand_homedir (filepath, namebuf, sizeof (namebuf)))
return NULL;
filepath = namebuf;
/* Check for full or current directory relative path */
if ((filepath[1] == ':') ||
(filepath[0] == '/') ||
(filepath[0] == '\\')){