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CKIUTL.C
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1990-01-31
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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/* |_o_o|\\ Copyright (c) 1986 The Software Distillery. All Rights Reserved */
/* |. o.| || This program may not be distributed without the permission of */
/* | . | || the authors. */
/* | o | || Dave Baker Ed Burnette Stan Chow Jay Denebeim */
/* | . |// Gordon Keener Jack Rouse John Toebes Doug Walker */
/* ====== BBS:(919)-471-6436 VOICE:(919)-469-4210 */
/* */
/* Contributed to Columbia University for inclusion in C-Kermit. */
/* Permission is granted to any individual or institution to use, copy, or */
/* redistribute this software so long as it is not sold for profit, provided */
/* this copyright notice is retained. */
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/* C K I U T L -- July 17, 1986
* Utility functions for C-Kermit on the Amiga
*/
/*
Author: Jack Rouse, The Software Distillery
The file status routines assume all file protection modes are real, instead
of just delete protection on files and write protection on disks.
*/
#include <stdio.h>
#undef NULL
#include "exec/types.h"
#include "exec/exec.h"
#include "libraries/dos.h"
#include "libraries/dosextens.h"
#define fh_Interact fh_Port
#define fh_Process fh_Type
#define ACTION_CLOSE 1007
#ifdef LAT310
#include "fcntl.h"
#include "signal.h"
#else
#include "lattice/ios1.h" /* defines ufbs structure */
#endif
/* external routine definitions */
APTR AllocMem();
LONG AllocSignal();
struct IORequest *CheckIO();
VOID CloseDevice();
VOID CloseLibrary();
LONG DoIO();
struct MsgPort *FindPort();
struct Task *FindTask();
VOID FreeMem();
VOID FreeSignal();
struct Message *GetMsg();
LONG OpenDevice();
struct Library *OpenLibrary();
VOID PutMsg();
VOID ReplyMsg();
VOID SendIO();
LONG SetSignal();
VOID Signal();
LONG Wait();
LONG WaitIO();
struct Message *WaitPort();
struct IORequest *CreateExtIO();
struct MsgPort *CreatePort();
VOID Close();
LONG DeleteFile();
LONG Execute();
BPTR Input(), Output();
LONG IoErr();
LONG IsInteractive();
BPTR Lock();
BPTR Open();
LONG Read();
VOID UnLock();
LONG WaitForChar();
/* portable library */
char *malloc();
#ifdef LAT310
/* translate Unix file handle (0, 1, or 2) to AmigaDOS file handle */
#define DOSFH(n) fileno(&_iob[n])
/* translate Unix file handle (0, 1, or 2) to Lattice file handle */
#define FILENO(n) fileno(&_iob[n])
#else
/* Lattice runtime externals */
extern struct UFB _ufbs[];
extern int Enable_Abort;
#define DOSFH(n) (_ufbs[n].ufbfh)
#define FILENO(n) (n)
#endif
/* Amiga Kermit externals (defined in ckitio.c) */
extern struct Process *CurProc;
extern struct CommandLineInterface *CurCLI;
/*
* CreatePacket -- allocate and set up a AmigaDOS packet
*/
struct DosPacket *CreatePacket()
{
register struct StandardPacket *sp;
sp = (struct StandardPacket *)
AllocMem((LONG)sizeof(struct StandardPacket),
(LONG)MEMF_PUBLIC|MEMF_CLEAR);
if (sp == NULL) return(NULL);
sp->sp_Pkt.dp_Link = &sp->sp_Msg;
sp->sp_Msg.mn_Node.ln_Type = NT_MESSAGE;
sp->sp_Msg.mn_Node.ln_Name = (char *)&sp->sp_Pkt;
sp->sp_Msg.mn_Length = sizeof(struct DosPacket);
return(&sp->sp_Pkt);
}
/*
* DeletePacket -- deallocate packet from CreatePacket()
*/
VOID DeletePacket(pkt)
struct DosPacket *pkt;
{
FreeMem(pkt->dp_Link, (LONG)sizeof(struct StandardPacket));
}
/*
* system(cmd) -- execute a command
* provides no sensible return value
*/
system(cmd)
char *cmd;
{
BPTR fh;
fflush(stdout);
if (cmd == NULL || *cmd == '\0')
{
fh = Open("CON:0/0/640/200/Kermit CLI", (LONG)MODE_NEWFILE);
if (fh)
{
Execute("", fh, (BPTR)NULL);
/* fix 'endcli' bug */
((struct FileHandle *)BADDR(fh))->fh_Pos = 0;
Close(fh);
}
}
else
Execute(cmd, (BPTR)NULL, DOSFH(1));
}
/*
* getcwd -- get current working directory text
*/
char *getcwd(buf, len)
register char *buf;
int len;
{
register UBYTE *dirname;
if (CurCLI == NULL) return(NULL);
dirname = (UBYTE *)BADDR(CurCLI->cli_SetName);
if (len < *dirname + 1) return(NULL);
strncpy(buf, dirname + 1, *dirname);
buf[*dirname] = 0;
return(buf);
}
/*
* update the current directory name in the CLI process structure
*
* This version generates the new name from the current name and
* the specified path, something like the CD command does.
* A much better version could be written using Parent(), Examine(),
* and VolInfo to reconstitute a name from a lock, but Parent() doesn't
* work with RAM: in V1.1. The current implementation, like the CD
* command, has difficulty with backing up the directory tree. For example
* { chdir("c:"); chdir("/"); } results in a dir name of "c:/". However,
* this version shouldn't get as far out of sync as the CD command. (The
* same sequence with the CD command puts you in the parent dir of "c:" but
* with a directory name of "c:".)
*/
static void update_dirname(name)
register char *name;
{
register UBYTE *dirname; /* DOS directory name BSTR */
char buf[100]; /* about same size as DOS */
register char *tail;
/* locate the DOS copy of the directory name */
if (CurCLI == NULL) return;
dirname = (UBYTE *)BADDR(CurCLI->cli_SetName);
/* if the name is anchored (like "DF1:") simply replace the name */
if (strrchr(name, ':') != NULL)
{
*dirname = strlen(name);
strncpy(&dirname[1], name, *dirname);
return;
}
/* name is relative to current directory, copy name to work with */
strncpy(buf, &dirname[1], *dirname);
tail = &buf[*dirname];
/* traverse the path in the name */
while (*name)
{
/* go to parent dir? */
if (*name == '/')
{ /* remove a component from the directory path */
/* advance past parent slash */
++name;
/* if at colon, can't back up */
if (tail[-1] == ':')
{
*tail++ = '/';
continue;
}
/* if at slash, see if name given */
if (tail[-1] == '/')
{
/* if no name, can't back up */
if (tail[-2] == '/' || tail[-2] == ':')
{
*tail++ = '/';
continue;
}
/* remove trailing slash */
--tail;
}
/* remove remainder of component */
while (tail[-1] != '/' && tail[-1] != ':')
--tail;
}
else
{ /* add component to directory path */
/* add slash if necessary to separate name */
if (tail[-1] != ':' && tail[-1] != '/')
*tail++ = '/';
/* add component name */
while (*name && *name != '/')
*tail++ = *name++;
/* add trailing slash if specified */
if (*name == '/')
*tail++ = *name++;
}
}
/* set BSTR to derived name */
*dirname = tail - buf;
strncpy(&dirname[1], buf, *dirname);
}
/*
* change current directory
*/
int chdir(name)
char *name;
{
BPTR lock;
BPTR oldlock;
struct FileInfoBlock *fib;
/* ignore chdir("") */
if (*name == 0) return(0);
/* try to look at the object */
lock = Lock(name, (LONG)ACCESS_READ);
if (lock == NULL) return(-1);
/* make sure the file is a directory */
fib = (struct FileInfoBlock *)malloc(sizeof(*fib));
if (fib == NULL || !Examine(lock, fib) || fib->fib_DirEntryType <= 0)
{
if (fib) free(fib);
UnLock(lock);
return(-1);
}
/* don't need file info any more */
free(fib);
/* change the current directory */
oldlock = CurrentDir(lock);
/* update the DOS copy of the directory name */
update_dirname(name);
/* unlock the previous current directory */
if (oldlock) UnLock(oldlock);
return(0);
}
#ifndef LAT310
/*
* print an error message with explanation
* (no explanation currently)
*/
int perror(str)
char *str;
{
extern int errno;
LONG oserr = IoErr();
printf("%s: errno=%d, oserr=%ld\n", str, errno, oserr);
}
#endif
/*
* isatty(fd) -- determine if given file is a (virtual) terminal
* only works for fd=0, 1, or 2 (stdin, stdout, and stderr resp.)
*/
int isatty(fd)
int fd;
{
return(IsInteractive(DOSFH(fd)) != 0);
}
/*
* readstat -- determine file's read status
* returns -3 if file read protected
* returns -2 if file is a directory
* returns -1 if file doesn't exist
* returns file size otherwise
*/
long readstat(name)
char *name;
{
BPTR lock;
struct FileInfoBlock *fib;
long size;
/* locate the file */
if ((lock = Lock(name, (LONG)ACCESS_READ)) == NULL) return(-1);
/* allocate a file info block */
if ((fib = (struct FileInfoBlock *)malloc(sizeof(*fib))) == NULL)
{ size = -1; goto exit; }
/* make sure it's not a directory */
if (!Examine(lock, fib) || fib->fib_DirEntryType >= 0)
{ size = -2; goto exit; }
/* make sure it's readable */
if (fib->fib_Protection & FIBF_READ)
{ size = -3; goto exit; }
size = fib->fib_Size;
exit:
if (fib) free(fib);
UnLock(lock);
return(size);
}
/*
* writestat -- determines file's write status
* returns 0 if file should be writable, -1 otherwise
*
* The following logic is used to determine if a file is writable:
* 1. If the file exists, it must not be write or delete protected.
* (Delete protection subsumes write protection for overwriting.)
* 2. The parent directory must not be write protected ???
* 3. The volume that the parent directory resides on must be
* validated and not write protected.
*/
int writestat(name)
register char *name;
{
register char *p;
char *lastslash;
char path[100];
BPTR lock;
struct FileInfoBlock *fib;
struct InfoData *id = NULL;
int rc = -1;
/* allocate a FileInfoBlock */
fib = (struct FileInfoBlock *)malloc(sizeof(*fib));
if (fib == NULL) goto exit;
/* see if the file exists */
if ((lock = Lock(name, (LONG)ACCESS_READ)) != NULL)
{
/* make sure it's not a directory or write protected */
if (!Examine(lock, fib) ||
fib->fib_DirEntryType >= 0 ||
(fib->fib_Protection & (FIBF_WRITE|FIBF_DELETE)) )
goto exit;
UnLock(lock);
}
/* strip path from name */
lastslash = NULL;
for (p = path; *p = *name; ++p, ++name)
if (*p == '/' || *p == ':')
lastslash = p;
/* make sure the path exists */
if (lastslash)
{
lastslash[1] = 0;
lock = Lock(path, (LONG)ACCESS_READ);
}
else
lock = (CurProc->pr_CurrentDir)
? DupLock(CurProc->pr_CurrentDir)
: NULL;
/* make sure it is a directory that is not write protected */
if (lock == NULL || !Examine(lock, fib) ||
fib->fib_DirEntryType <= 0 ||
(fib->fib_Protection & FIBF_WRITE) )
goto exit;
/* get device info */
if ((id = (struct InfoData *)malloc(sizeof(*id))) == NULL) goto exit;
/* make sure the disk is writeable */
if (Info(lock, id) && id->id_DiskState == ID_VALIDATED)
rc = 0;
/* clean up */
exit:
if (id) free(id);
if (fib) free(fib);
if (lock) UnLock(lock);
return(rc);
}
/*
* pipeopen -- execute command to read output like a file
*/
#define PIPEHOLDER "RAM:Pipe-Holder"
FILE *pipeopen(command)
char *command;
{
BPTR fh;
/* create holder file */
fh = Open(PIPEHOLDER, (LONG)MODE_NEWFILE);
if (fh == NULL) return(0);
/* execute the command */
Execute(command, (BPTR)NULL, fh);
/* close the holder file */
Close(fh);
/* reopen it for input */
return(fopen(PIPEHOLDER, "r"));
}
/*
* pipeclose -- clean up after pipe open
*/
pipeclose(f)
FILE *f;
{
fclose(f);
DeleteFile(PIPEHOLDER);
}
/*
* existobj -- return true if file system object exists
*/
int existobj(name)
char *name;
{
BPTR lock;
if (*name == 0) return(CurProc->pr_CurrentDir != NULL);
if ((lock = Lock(name, (LONG)ACCESS_READ)) == NULL)
return(0);
UnLock(lock);
return(1);
}
/* opendir handle structure */
struct DirHandle {
struct FileInfoBlock fib;
BPTR lock;
};
/*
* attempt to open a directory, fill in a handle structure
*/
struct DirHandle *opendir(name)
char *name;
{
BPTR lock;
struct DirHandle *dh;
/* get lock on name ("" is current dir) */
lock = (*name != 0) ? Lock(name, (LONG)ACCESS_READ) :
(CurProc->pr_CurrentDir) ? DupLock(CurProc->pr_CurrentDir)
: NULL;
if (lock == NULL) return(NULL);
dh = (struct DirHandle *)malloc(sizeof(*dh));
if (dh == NULL)
{
UnLock(lock);
return(NULL);
}
if (!Examine(lock, &dh->fib) || dh->fib.fib_DirEntryType <= 0)
{
UnLock(lock);
free(dh);
return(NULL);
}
/* pass it into the caller's care */
dh->lock = lock;
return(dh);
}
/*
* return name for next entry in dir
*/
char *readdir(dh)
struct DirHandle *dh;
{
return(ExNext(dh->lock, &dh->fib) ? dh->fib.fib_FileName : NULL);
}
/*
* finish accessing a directory
*/
VOID closedir(dh)
struct DirHandle *dh;
{
UnLock(dh->lock);
free(dh);
}