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diff --git a/missing/nt.c b/missing/nt.c
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+++ b/missing/nt.c
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+/*
+ * Copyright (c) 1993, Intergraph Corporation
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Artistic License, as specified in the perl README file.
+ *
+ * Various Unix compatibility functions and NT specific functions.
+ *
+ * Some of this code was derived from the MSDOS port(s) and the OS/2 port.
+ *
+ */
+
+#include "ruby.h"
+#include <fcntl.h>
+#include <process.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+#include <assert.h>
+
+bool NtSyncProcess = FALSE;
+extern char **environ;
+
+static bool NtHasRedirection (char *);
+static int valid_filename(char *s);
+
+FILE *fdopen(int, char *);
+
+void
+sleep(unsigned int len)
+{
+ time_t end;
+
+ end = time((time_t *)0) + len;
+ while (time((time_t *)0) < end)
+ ;
+}
+
+//
+// Initialization stuff
+//
+void
+NtInitialize(int *argc, char ***argv) {
+
+ WORD version;
+ WSADATA retdata;
+ int ret;
+
+ //
+ // subvert cmd.exe\'s feeble attempt at command line parsing
+ //
+ *argc = NtMakeCmdVector((char *)GetCommandLine(), argv, TRUE);
+
+ //
+ // Now set up the correct time stuff
+ //
+
+ tzset();
+}
+
+
+char *getlogin()
+{
+ char buffer[200];
+ int len = 200;
+ extern char *NTLoginName;
+
+ if (NTLoginName == NULL) {
+ if (GetUserName(buffer, &len)) {
+ NTLoginName = ALLOC_N(char, len+1);
+ strncpy(NTLoginName, buffer, len);
+ NTLoginName[len] = '\0';
+ }
+ else {
+ NTLoginName = "<Unknown>";
+ }
+ }
+ return NTLoginName;
+}
+
+
+
+// popen stuff
+
+//
+// use these so I can remember which index is which
+//
+
+#define NtPipeRead 0 // index of pipe read descriptor
+#define NtPipeWrite 1 // index of pipe write descriptor
+
+#define NtPipeSize 1024 // size of pipe buffer
+
+#define MYPOPENSIZE 256 // size of book keeping structure
+
+struct {
+ int inuse;
+ int pid;
+ FILE *pipe;
+} MyPopenRecord[MYPOPENSIZE];
+
+FILE *
+mypopen (char *cmd, char *mode)
+{
+ FILE *fp;
+ int saved, reading;
+ int pipemode;
+ int pipes[2];
+ int pid;
+ int slot;
+ static initialized = 0;
+
+ //
+ // if first time through, intialize our book keeping structure
+ //
+
+ if (!initialized++) {
+ for (slot = 0; slot < MYPOPENSIZE; slot++)
+ MyPopenRecord[slot].inuse = FALSE;
+ }
+
+ //
+ // find a free popen slot
+ //
+
+ for (slot = 0; slot < MYPOPENSIZE && MyPopenRecord[slot].inuse; slot++)
+ ;
+
+ if (slot > MYPOPENSIZE) {
+ return NULL;
+ }
+
+ //
+ // Figure out what we\'re doing...
+ //
+
+ reading = (*mode == 'r') ? TRUE : FALSE;
+ pipemode = (*(mode+1) == 'b') ? O_BINARY : O_TEXT;
+
+ //
+ // Now get a pipe
+ //
+
+ if (_pipe(pipes, NtPipeSize, pipemode) == -1) {
+ return NULL;
+ }
+
+ if (reading) {
+
+ //
+ // we\'re reading from the pipe, so we must hook up the
+ // write end of the pipe to the new processes stdout.
+ // To do this we must save our file handle from stdout
+ // by _dup\'ing it, then setting our stdout to be the pipe\'s
+ // write descriptor. We must also make the write handle
+ // inheritable so the new process can use it.
+
+ if ((saved = _dup(fileno(stdout))) == -1) {
+ _close(pipes[NtPipeRead]);
+ _close(pipes[NtPipeWrite]);
+ return NULL;
+ }
+ if (_dup2 (pipes[NtPipeWrite], fileno(stdout)) == -1) {
+ _close(pipes[NtPipeRead]);
+ _close(pipes[NtPipeWrite]);
+ return NULL;
+ }
+ }
+ else {
+ //
+ // must be writing to the new process. Do the opposite of
+ // the above, i.e. hook up the processes stdin to the read
+ // end of the pipe.
+ //
+
+ if ((saved = _dup(fileno(stdin))) == -1) {
+ _close(pipes[NtPipeRead]);
+ _close(pipes[NtPipeWrite]);
+ return NULL;
+ }
+ if (_dup2(pipes[NtPipeRead], fileno(stdin)) == -1) {
+ _close(pipes[NtPipeRead]);
+ _close(pipes[NtPipeWrite]);
+ return NULL;
+ }
+ }
+
+ //
+ // Start the new process. Must set _fileinfo to non-zero value
+ // for file descriptors to be inherited. Reset after the process
+ // is started.
+ //
+
+ if (NtHasRedirection(cmd)) {
+ docmd:
+ pid = spawnlpe(_P_NOWAIT, "cmd.exe", "/c", cmd, 0, environ);
+ if (pid == -1) {
+ _close(pipes[NtPipeRead]);
+ _close(pipes[NtPipeWrite]);
+ return NULL;
+ }
+ }
+ else {
+ char **vec;
+ int vecc = NtMakeCmdVector(cmd, &vec, FALSE);
+
+ pid = spawnvpe (_P_NOWAIT, vec[0], vec, environ);
+ if (pid == -1) {
+ goto docmd;
+ }
+ Safefree (vec);
+ }
+
+ if (reading) {
+
+ //
+ // We need to close our instance of the inherited pipe write
+ // handle now that it's been inherited so that it will actually close
+ // when the child process ends.
+ //
+
+ if (_close(pipes[NtPipeWrite]) == -1) {
+ _close(pipes[NtPipeRead]);
+ return NULL;
+ }
+ if (_dup2 (saved, fileno(stdout)) == -1) {
+ _close(pipes[NtPipeRead]);
+ return NULL;
+ }
+ _close(saved);
+
+ //
+ // Now get a stream pointer to return to the calling program.
+ //
+
+ if ((fp = (FILE *) fdopen(pipes[NtPipeRead], mode)) == NULL) {
+ return NULL;
+ }
+ }
+ else {
+
+ //
+ // need to close our read end of the pipe so that it will go
+ // away when the write end is closed.
+ //
+
+ if (_close(pipes[NtPipeRead]) == -1) {
+ _close(pipes[NtPipeWrite]);
+ return NULL;
+ }
+ if (_dup2 (saved, fileno(stdin)) == -1) {
+ _close(pipes[NtPipeWrite]);
+ return NULL;
+ }
+ _close(saved);
+
+ //
+ // Now get a stream pointer to return to the calling program.
+ //
+
+ if ((fp = (FILE *) fdopen(pipes[NtPipeWrite], mode)) == NULL) {
+ _close(pipes[NtPipeWrite]);
+ return NULL;
+ }
+ }
+
+ //
+ // do the book keeping
+ //
+
+ MyPopenRecord[slot].inuse = TRUE;
+ MyPopenRecord[slot].pipe = fp;
+ MyPopenRecord[slot].pid = pid;
+
+ return fp;
+}
+
+int
+mypclose(FILE *fp)
+{
+ int i;
+ int exitcode;
+
+ for (i = 0; i < MYPOPENSIZE; i++) {
+ if (MyPopenRecord[i].inuse && MyPopenRecord[i].pipe == fp)
+ break;
+ }
+ if (i >= MYPOPENSIZE) {
+ fprintf(stderr,"Invalid file pointer passed to mypclose!\n");
+ abort();
+ }
+
+ //
+ // get the return status of the process
+ //
+
+ if (_cwait(&exitcode, MyPopenRecord[i].pid, WAIT_CHILD) == -1) {
+ if (errno == ECHILD) {
+ fprintf(stderr, "mypclose: nosuch child as pid %x\n",
+ MyPopenRecord[i].pid);
+ }
+ }
+
+ //
+ // close the pipe
+ //
+
+ fclose(fp);
+
+ //
+ // free this slot
+ //
+
+ MyPopenRecord[i].inuse = FALSE;
+
+ return exitcode;
+}
+
+
+/*
+ * The following code is based on the do_exec and do_aexec functions
+ * in file doio.c
+ */
+
+int
+do_spawn(cmd)
+char *cmd;
+{
+ register char **a;
+ register char *s;
+ char **argv;
+ int status;
+ char *shell, *cmd2;
+ int mode = NtSyncProcess ? P_WAIT : P_NOWAIT;
+
+ /* save an extra exec if possible */
+ if ((shell = getenv("COMSPEC")) == 0)
+ shell = "cmd.exe";
+
+ /* see if there are shell metacharacters in it */
+ if (NtHasRedirection(cmd)) {
+ doshell:
+ return spawnle(mode, shell, shell, "/c", cmd, (char*)0, environ);
+ }
+
+ argv = ALLOC_N(char*, strlen(cmd) / 2 + 2);
+ cmd2 = ALOOC_N(char, strlen(cmd) + 1);
+ strcpy(cmd2, cmd);
+ a = argv;
+ for (s = cmd2; *s;) {
+ while (*s && isspace(*s)) s++;
+ if (*s)
+ *(a++) = s;
+ while (*s && !isspace(*s)) s++;
+ if (*s)
+ *s++ = '\0';
+ }
+ *a = Qnil;
+ if (argv[0]) {
+ if ((status = spawnvpe(mode, argv[0], argv, environ)) == -1) {
+ free(argv);
+ free(cmd2);
+ goto doshell;
+ }
+ }
+ free(cmd2);
+ free(argv);
+ return status;
+}
+
+
+
+typedef struct _NtCmdLineElement {
+ struct _NtCmdLineElement *next, *prev;
+ char *str;
+ int len;
+ int flags;
+} NtCmdLineElement;
+
+//
+// Possible values for flags
+//
+
+#define NTGLOB 0x1 // element contains a wildcard
+#define NTMALLOC 0x2 // string in element was malloc'ed
+#define NTSTRING 0x4 // element contains a quoted string
+
+NtCmdLineElement *NtCmdHead = NULL, *NtCmdTail = NULL;
+
+void
+NtFreeCmdLine(void)
+{
+ NtCmdLineElement *ptr;
+
+ while(NtCmdHead) {
+ ptr = NtCmdHead;
+ NtCmdHead = NtCmdHead->next;
+ free(ptr);
+ }
+ NtCmdHead = NtCmdTail = NULL;
+}
+
+//
+// This function expands wild card characters that were spotted
+// during the parse phase. The idea here is to call FindFirstFile and
+// FindNextFile with the wildcard pattern specified, and splice in the
+// resulting list of new names. If the wildcard pattern doesn\'t match
+// any existing files, just leave it in the list.
+//
+
+void
+NtCmdGlob (NtCmdLineElement *patt)
+{
+ WIN32_FIND_DATA fd;
+ HANDLE fh;
+ char buffer[512];
+ NtCmdLineElement *tmphead, *tmptail, *tmpcurr;
+
+ strncpy(buffer, patt->str, patt->len);
+ buffer[patt->len] = '\0';
+ if ((fh = FindFirstFile (buffer, &fd)) == INVALID_HANDLE_VALUE) {
+ return;
+ }
+ tmphead = tmptail = NULL;
+ do {
+ tmpcurr = ALLOC(NtCmdLineElement);
+ if (tmpcurr == NULL) {
+ fprintf(stderr, "Out of Memory in globbing!\n");
+ while (tmphead) {
+ tmpcurr = tmphead;
+ tmphead = tmphead->next;
+ free(tmpcurr->str);
+ free(tmpcurr);
+ }
+ return;
+ }
+ memset (tmpcurr, 0, sizeof(*tmpcurr));
+ tmpcurr->len = strlen(fd.cFileName);
+ tmpcurr->str = ALLOC_N(char, tmpcurr->len+1);
+ if (tmpcurr->str == NULL) {
+ fprintf(stderr, "Out of Memory in globbing!\n");
+ while (tmphead) {
+ tmpcurr = tmphead;
+ tmphead = tmphead->next;
+ free(tmpcurr->str);
+ free(tmpcurr);
+ }
+ return;
+ }
+ strcpy(tmpcurr->str, fd.cFileName);
+ tmpcurr->flags |= NTMALLOC;
+ if (tmptail) {
+ tmptail->next = tmpcurr;
+ tmpcurr->prev = tmptail;
+ tmptail = tmpcurr;
+ }
+ else {
+ tmptail = tmphead = tmpcurr;
+ }
+ } while(FindNextFile(fh, &fd));
+
+ //
+ // ok, now we\'ve got a list of files that matched the wildcard
+ // specification. Put it in place of the pattern structure.
+ //
+
+ tmphead->prev = patt->prev;
+ tmptail->next = patt->next;
+
+ if (tmphead->prev)
+ tmphead->prev->next = tmphead;
+
+ if (tmptail->next)
+ tmptail->next->prev = tmptail;
+
+ //
+ // Now get rid of the pattern structure
+ //
+
+ if (patt->flags & NTMALLOC)
+ free(patt->str);
+ free(patt);
+}
+
+//
+// Check a command string to determine if it has I/O redirection
+// characters that require it to be executed by a command interpreter
+//
+
+static bool
+NtHasRedirection (char *cmd)
+{
+ int inquote = 0;
+ char quote = '\0';
+ char *ptr ;
+
+ //
+ // Scan the string, looking for redirection (< or >) or pipe
+ // characters (|) that are not in a quoted string
+ //
+
+ for (ptr = cmd; *ptr; ptr++) {
+
+ switch (*ptr) {
+
+ case '\'':
+ case '\"':
+ if (inquote) {
+ if (quote == *ptr) {
+ inquote = 0;
+ quote = '\0';
+ }
+ }
+ else {
+ quote = *ptr;
+ inquote++;
+ }
+ break;
+
+ case '>':
+ case '<':
+
+ if (!inquote)
+ return TRUE;
+ }
+ }
+ return FALSE;
+}
+
+
+int
+NtMakeCmdVector (char *cmdline, char ***vec, int InputCmd)
+{
+ int cmdlen = strlen(cmdline);
+ int done, instring, globbing, quoted, len;
+ int newline, need_free = 0, i;
+ int elements, strsz;
+ int slashes = 0;
+ char *ptr, *base, *buffer;
+ char **vptr;
+ char quote;
+ NtCmdLineElement *curr;
+
+ //
+ // just return if we don\'t have a command line
+ //
+
+ if (cmdlen == 0) {
+ *vec = NULL;
+ return 0;
+ }
+
+ //
+ // strip trailing white space
+ //
+
+ ptr = cmdline+(cmdlen - 1);
+ while(ptr >= cmdline && isspace(*ptr))
+ --ptr;
+ *++ptr = '\0';
+
+ //
+ // check for newlines and formfeeds. If we find any, make a new
+ // command string that replaces them with escaped sequences (\n or \f)
+ //
+
+ for (ptr = cmdline, newline = 0; *ptr; ptr++) {
+ if (*ptr == '\n' || *ptr == '\f')
+ newline++;
+ }
+
+ if (newline) {
+ base = ALLOC_N(char, strlen(cmdline) + 1 + newline + slashes);
+ if (base == NULL) {
+ fprintf(stderr, "malloc failed!\n");
+ return 0;
+ }
+ for (i = 0, ptr = base; (unsigned) i < strlen(cmdline); i++) {
+ switch (cmdline[i]) {
+ case '\n':
+ *ptr++ = '\\';
+ *ptr++ = 'n';
+ break;
+ default:
+ *ptr++ = cmdline[i];
+ }
+ }
+ *ptr = '\0';
+ cmdline = base;
+ need_free++;
+ }
+
+ //
+ // Ok, parse the command line, building a list of CmdLineElements.
+ // When we\'ve finished, and it\'s an input command (meaning that it\'s
+ // the processes argv), we\'ll do globing and then build the argument
+ // vector.
+ // The outer loop does one interation for each element seen.
+ // The inner loop does one interation for each character in the element.
+ //
+
+ for (done = 0, ptr = cmdline; *ptr;) {
+
+ //
+ // zap any leading whitespace
+ //
+
+ while(isspace(*ptr))
+ ptr++;
+ base = ptr;
+
+ for (done = newline = globbing = instring = quoted = 0;
+ *ptr && !done; ptr++) {
+
+ //
+ // Switch on the current character. We only care about the
+ // white-space characters, the wild-card characters, and the
+ // quote characters.
+ //
+
+ switch (*ptr) {
+ case ' ':
+ case '\t':
+#if 0
+ case '/': // have to do this for NT/DOS option strings
+
+ //
+ // check to see if we\'re parsing an option switch
+ //
+
+ if (*ptr == '/' && base == ptr)
+ continue;
+#endif
+ //
+ // if we\'re not in a string, then we\'re finished with this
+ // element
+ //
+
+ if (!instring)
+ done++;
+ break;
+
+ case '*':
+ case '?':
+
+ //
+ // record the fact that this element has a wildcard character
+ // N.B. Don\'t glob if inside a single quoted string
+ //
+
+ if (!(instring && quote == '\''))
+ globbing++;
+ break;
+
+ case '\n':
+
+ //
+ // If this string contains a newline, mark it as such so
+ // we can replace it with the two character sequence "\n"
+ // (cmd.exe doesn\'t like raw newlines in strings...sigh).
+ //
+
+ newline++;
+ break;
+
+ case '\'':
+ case '\"':
+
+ //
+ // if we\'re already in a string, see if this is the
+ // terminating close-quote. If it is, we\'re finished with
+ // the string, but not neccessarily with the element.
+ // If we\'re not already in a string, start one.
+ //
+
+ if (instring) {
+ if (quote == *ptr) {
+ instring = 0;
+ quote = '\0';
+ }
+ }
+ else {
+ instring++;
+ quote = *ptr;
+ quoted++;
+ }
+ break;
+ }
+ }
+
+ //
+ // need to back up ptr by one due to last increment of for loop
+ // (if we got out by seeing white space)
+ //
+
+ if (*ptr)
+ ptr--;
+
+ //
+ // when we get here, we\'ve got a pair of pointers to the element,
+ // base and ptr. Base points to the start of the element while ptr
+ // points to the character following the element.
+ //
+
+ curr = ALLOC(NtCmdLineElement);
+ if (curr == NULL) {
+ NtFreeCmdLine();
+ fprintf(stderr, "Out of memory!!\n");
+ *vec = NULL;
+ return 0;
+ }
+ memset (curr, 0, sizeof(*curr));
+
+ len = ptr - base;
+
+ //
+ // if it\'s an input vector element and it\'s enclosed by quotes,
+ // we can remove them.
+ //
+
+ if (InputCmd &&
+ ((base[0] == '\"' && base[len-1] == '\"') ||
+ (base[0] == '\'' && base[len-1] == '\''))) {
+ base++;
+ len -= 2;
+ }
+
+ curr->str = base;
+ curr->len = len;
+ curr->flags |= (globbing ? NTGLOB : 0);
+
+ //
+ // Now put it in the list of elements
+ //
+ if (NtCmdTail) {
+ NtCmdTail->next = curr;
+ curr->prev = NtCmdTail;
+ NtCmdTail = curr;
+ }
+ else {
+ NtCmdHead = NtCmdTail = curr;
+ }
+ }
+
+ if (InputCmd) {
+
+ //
+ // When we get here we\'ve finished parsing the command line. Now
+ // we need to run the list, expanding any globbing patterns.
+ //
+
+ for(curr = NtCmdHead; curr; curr = curr->next) {
+ if (curr->flags & NTGLOB) {
+ NtCmdGlob(curr);
+ }
+ }
+ }
+
+ //
+ // Almost done!
+ // Count up the elements, then allocate space for a vector of pointers
+ // (argv) and a string table for the elements.
+ //
+
+ for (elements = 0, strsz = 0, curr = NtCmdHead; curr; curr = curr->next) {
+ elements++;
+ strsz += (curr->len + 1);
+ }
+
+ len = (elements+1)*sizeof(char *) + strsz;
+ buffer = ALLOC_N(char, len);
+ if (buffer == NULL) {
+ fprintf(stderr, "Out of memory!!\n");
+ NtFreeCmdLine();
+ *vec = NULL;
+ return 0;
+ }
+
+ memset (buffer, 0, len);
+
+ //
+ // make vptr point to the start of the buffer
+ // and ptr point to the area we\'ll consider the string table.
+ //
+
+ vptr = (char **) buffer;
+
+ ptr = buffer + (elements+1) * sizeof(char *);
+
+ for (curr = NtCmdHead; curr; curr = curr->next) {
+ strncpy (ptr, curr->str, curr->len);
+ ptr[curr->len] = '\0';
+ *vptr++ = ptr;
+ ptr += curr->len + 1;
+ }
+ NtFreeCmdLine();
+ *vec = (char **) buffer;
+ return elements;
+}
+
+
+//
+// UNIX compatible directory access functions for NT
+//
+
+//
+// File names are converted to lowercase if the
+// CONVERT_TO_LOWER_CASE variable is defined.
+//
+
+#define CONVERT_TO_LOWER_CASE
+#define PATHLEN 1024
+
+//
+// The idea here is to read all the directory names into a string table
+// (separated by nulls) and when one of the other dir functions is called
+// return the pointer to the current file name.
+//
+
+DIR *
+opendir(char *filename)
+{
+ DIR *p;
+ long len;
+ long idx;
+ char scannamespc[PATHLEN];
+ char *scanname = scannamespc;
+ struct stat sbuf;
+ WIN32_FIND_DATA FindData;
+ HANDLE fh;
+ char root[PATHLEN];
+ char volname[PATHLEN];
+ DWORD serial, maxname, flags;
+ BOOL downcase;
+ char *dummy;
+
+ //
+ // check to see if we\'ve got a directory
+ //
+
+ if (stat (filename, &sbuf) < 0 ||
+ sbuf.st_mode & _S_IFDIR == 0) {
+ return NULL;
+ }
+
+ //
+ // check out the file system characteristics
+ //
+ if (GetFullPathName(filename, PATHLEN, root, &dummy)) {
+ if (dummy = strchr(root, '\\'))
+ *++dummy = '\0';
+ if (GetVolumeInformation(root, volname, PATHLEN,
+ &serial, &maxname, &flags, 0, 0)) {
+ downcase = !(flags & FS_CASE_SENSITIVE);
+ }
+ }
+ else {
+ downcase = TRUE;
+ }
+
+ //
+ // Get us a DIR structure
+ //
+
+ p = xcalloc(sizeof(DIR), 1);
+ if (p == NULL)
+ return NULL;
+
+ //
+ // Create the search pattern
+ //
+
+ strcpy(scanname, filename);
+
+ if (index("/\\", *(scanname + strlen(scanname) - 1)) == NULL)
+ strcat(scanname, "/*");
+ else
+ strcat(scanname, "*");
+
+ //
+ // do the FindFirstFile call
+ //
+
+ fh = FindFirstFile (scanname, &FindData);
+ if (fh == INVALID_HANDLE_VALUE) {
+ return NULL;
+ }
+
+ //
+ // now allocate the first part of the string table for the
+ // filenames that we find.
+ //
+
+ idx = strlen(FindData.cFileName)+1;
+ p->start = ALLOC_N(char, idx);
+ strcpy (p->start, FindData.cFileName);
+ if (downcase)
+ strlwr(p->start);
+ p->nfiles++;
+
+ //
+ // loop finding all the files that match the wildcard
+ // (which should be all of them in this directory!).
+ // the variable idx should point one past the null terminator
+ // of the previous string found.
+ //
+ while (FindNextFile(fh, &FindData)) {
+ len = strlen (FindData.cFileName);
+
+ //
+ // bump the string table size by enough for the
+ // new name and it's null terminator
+ //
+
+ Renew (p->start, idx+len+1, char);
+ if (p->start == NULL) {
+ fatal ("opendir: malloc failed!\n");
+ }
+ strcpy(&p->start[idx], FindData.cFileName);
+ if (downcase)
+ strlwr(&p->start[idx]);
+ p->nfiles++;
+ idx += len+1;
+ }
+ FindClose(fh);
+ p->size = idx;
+ p->curr = p->start;
+ return p;
+}
+
+
+//
+// Readdir just returns the current string pointer and bumps the
+// string pointer to the next entry.
+//
+
+struct direct *
+readdir(DIR *dirp)
+{
+ int len;
+ static int dummy = 0;
+
+ if (dirp->curr) {
+
+ //
+ // first set up the structure to return
+ //
+
+ len = strlen(dirp->curr);
+ strcpy(dirp->dirstr.d_name, dirp->curr);
+ dirp->dirstr.d_namlen = len;
+
+ //
+ // Fake inode
+ //
+ dirp->dirstr.d_ino = dummy++;
+
+ //
+ // Now set up for the next call to readdir
+ //
+
+ dirp->curr += len + 1;
+ if (dirp->curr >= (dirp->start + dirp->size)) {
+ dirp->curr = NULL;
+ }
+
+ return &(dirp->dirstr);
+
+ } else
+ return NULL;
+}
+
+//
+// Telldir returns the current string pointer position
+//
+
+long
+telldir(DIR *dirp)
+{
+ return (long) dirp->curr; /* ouch! pointer to long cast */
+}
+
+//
+// Seekdir moves the string pointer to a previously saved position
+// (Saved by telldir).
+
+void
+seekdir(DIR *dirp, long loc)
+{
+ dirp->curr = (char *) loc; /* ouch! long to pointer cast */
+}
+
+//
+// Rewinddir resets the string pointer to the start
+//
+
+void
+rewinddir(DIR *dirp)
+{
+ dirp->curr = dirp->start;
+}
+
+//
+// This just free\'s the memory allocated by opendir
+//
+
+void
+closedir(DIR *dirp)
+{
+ free(dirp->start);
+ free(dirp);
+}
+
+
+
+//
+// 98.2% of this code was lifted from the OS2 port. (JCW)
+//
+
+/*
+ * Suffix appending for in-place editing under MS-DOS and OS/2 (and now NT!).
+ *
+ * Here are the rules:
+ *
+ * Style 0: Append the suffix exactly as standard perl would do it.
+ * If the filesystem groks it, use it. (HPFS will always
+ * grok it. So will NTFS. FAT will rarely accept it.)
+ *
+ * Style 1: The suffix begins with a '.'. The extension is replaced.
+ * If the name matches the original name, use the fallback method.
+ *
+ * Style 2: The suffix is a single character, not a '.'. Try to add the
+ * suffix to the following places, using the first one that works.
+ * [1] Append to extension.
+ * [2] Append to filename,
+ * [3] Replace end of extension,
+ * [4] Replace end of filename.
+ * If the name matches the original name, use the fallback method.
+ *
+ * Style 3: Any other case: Ignore the suffix completely and use the
+ * fallback method.
+ *
+ * Fallback method: Change the extension to ".$$$". If that matches the
+ * original name, then change the extension to ".~~~".
+ *
+ * If filename is more than 1000 characters long, we die a horrible
+ * death. Sorry.
+ *
+ * The filename restriction is a cheat so that we can use buf[] to store
+ * assorted temporary goo.
+ *
+ * Examples, assuming style 0 failed.
+ *
+ * suffix = ".bak" (style 1)
+ * foo.bar => foo.bak
+ * foo.bak => foo.$$$ (fallback)
+ * foo.$$$ => foo.~~~ (fallback)
+ * makefile => makefile.bak
+ *
+ * suffix = "~" (style 2)
+ * foo.c => foo.c~
+ * foo.c~ => foo.c~~
+ * foo.c~~ => foo~.c~~
+ * foo~.c~~ => foo~~.c~~
+ * foo~~~~~.c~~ => foo~~~~~.$$$ (fallback)
+ *
+ * foo.pas => foo~.pas
+ * makefile => makefile.~
+ * longname.fil => longname.fi~
+ * longname.fi~ => longnam~.fi~
+ * longnam~.fi~ => longnam~.$$$
+ *
+ */
+
+
+static char suffix1[] = ".$$$";
+static char suffix2[] = ".~~~";
+
+#define ext (&buf[1000])
+
+#define strEQ(s1,s2) (strcmp(s1,s2) == 0)
+
+void
+add_suffix(struct RString *str, char *suffix)
+{
+ int baselen;
+ int extlen = strlen(suffix);
+ char *s, *t, *p;
+ int slen;
+ char buf[1024];
+
+ if (str->len > 1000)
+ Fatal("Cannot do inplace edit on long filename (%d characters)", str->len);
+
+ /* Style 0 */
+ slen = str->len;
+ str_cat(str, suffix, extlen);
+ if (valid_filename(str->ptr)) return;
+
+ /* Fooey, style 0 failed. Fix str before continuing. */
+ str->ptr[str->len = slen] = '\0';
+
+ slen = extlen;
+ t = buf; baselen = 0; s = str->ptr;
+ while ( (*t = *s) && *s != '.') {
+ baselen++;
+ if (*s == '\\' || *s == '/') baselen = 0;
+ s++; t++;
+ }
+ p = t;
+
+ t = ext; extlen = 0;
+ while (*t++ = *s++) extlen++;
+ if (extlen == 0) { ext[0] = '.'; ext[1] = 0; extlen++; }
+
+ if (*suffix == '.') { /* Style 1 */
+ if (strEQ(ext, suffix)) goto fallback;
+ strcpy(p, suffix);
+ } else if (suffix[1] == '\0') { /* Style 2 */
+ if (extlen < 4) {
+ ext[extlen] = *suffix;
+ ext[++extlen] = '\0';
+ } else if (baselen < 8) {
+ *p++ = *suffix;
+ } else if (ext[3] != *suffix) {
+ ext[3] = *suffix;
+ } else if (buf[7] != *suffix) {
+ buf[7] = *suffix;
+ } else goto fallback;
+ strcpy(p, ext);
+ } else { /* Style 3: Panic */
+fallback:
+ (void)memcpy(p, strEQ(ext, suffix1) ? suffix2 : suffix1, 5);
+ }
+ str_grow(str, strlen(buf));
+ memcpy(str->ptr, buf, str->len);
+}
+
+static int
+valid_filename(char *s)
+{
+ int fd;
+
+ //
+ // if the file exists, then it\'s a valid filename!
+ //
+
+ if (_access(s, 0) == 0) {
+ return 1;
+ }
+
+ //
+ // It doesn\'t exist, so see if we can open it.
+ //
+
+ if ((fd = _open(s, _O_CREAT, 0666)) >= 0) {
+ close(fd);
+ _unlink (s); // don\'t leave it laying around
+ return 1;
+ }
+ return 0;
+}
+
+
+//
+// This is a clone of fdopen so that we can handle the
+// brain damaged version of sockets that NT gets to use.
+//
+// The problem is that sockets are not real file handles and
+// cannot be fdopen\'ed. This causes problems in the do_socket
+// routine in doio.c, since it tries to create two file pointers
+// for the socket just created. We\'ll fake out an fdopen and see
+// if we can prevent perl from trying to do stdio on sockets.
+//
+
+FILE *
+fdopen (int fd, char *mode)
+{
+ FILE *fp;
+ char sockbuf[80];
+ int optlen;
+ int retval;
+ extern int errno;
+
+ retval = getsockopt((SOCKET)fd, SOL_SOCKET, SO_TYPE, sockbuf, &optlen);
+ if (retval == SOCKET_ERROR && WSAGetLastError() == WSAENOTSOCK) {
+ return (_fdopen(fd, mode));
+ }
+
+ //
+ // If we get here, then fd is actually a socket.
+ //
+ fp = xcalloc(sizeof(FILE), 1);
+#if _MSC_VER < 800
+ fileno(fp) = fd;
+#else
+ fp->_file = fd;
+#endif
+ if (*mode = 'r')
+ fp->_flag = _IOREAD;
+ else
+ fp->_flag = _IOWRT;
+ return fp;
+}
+
+
+//
+// Since the errors returned by the socket error function
+// WSAGetLastError() are not known by the library routine strerror
+// we have to roll our own.
+//
+
+#undef strerror
+
+char *
+mystrerror(int e)
+{
+ static char buffer[512];
+ extern int sys_nerr;
+ DWORD source = 0;
+
+ if (e < 0 || e > sys_nerr) {
+ if (e < 0)
+ e = GetLastError();
+ if (FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, &source, e, 0,
+ buffer, 512, NULL) == 0) {
+ strcpy (buffer, "Unknown Error");
+ }
+ return buffer;
+ }
+ return strerror(e);
+
+}
+
+//
+// various stubs
+//
+
+
+// Ownership
+//
+// Just pretend that everyone is a superuser. NT will let us know if
+// we don\'t really have permission to do something.
+//
+
+#define ROOT_UID 0
+#define ROOT_GID 0
+
+UIDTYPE
+getuid(void)
+{
+ return ROOT_UID;
+}
+
+UIDTYPE
+geteuid(void)
+{
+ return ROOT_UID;
+}
+
+GIDTYPE
+getgid(void)
+{
+ return ROOT_GID;
+}
+
+GIDTYPE
+getegid(void)
+{
+ return ROOT_GID;
+}
+
+int
+setuid(int uid)
+{
+ return (uid == ROOT_UID ? 0 : -1);
+}
+
+int
+setgid(int gid)
+{
+ return (gid == ROOT_GID ? 0 : -1);
+}
+
+//
+// File system stuff
+//
+
+int
+ioctl(int i, unsigned int u, char *data)
+{
+ return -1;
+}
+
+
+//
+// Networking trampolines
+// These are used to avoid socket startup/shutdown overhead in case
+// the socket routines aren\'t used.
+//
+
+#undef select
+
+static int NtSocketsInitialized = 0;
+
+long
+myselect (int nfds, fd_set *rd, fd_set *wr, fd_set *ex,
+ struct timeval *timeout)
+{
+ long r;
+ if (!NtSocketsInitialized++) {
+ StartSockets();
+ }
+ if ((r = select (nfds, rd, wr, ex, timeout)) == SOCKET_ERROR)
+ errno = WSAGetLastError();
+ return r;
+}
+
+static void
+StartSockets () {
+ WORD version;
+ WSADATA retdata;
+ int ret;
+
+ //
+ // initalize the winsock interface and insure that it\'s
+ // cleaned up at exit.
+ //
+ version = MAKEWORD(1, 1);
+ if (ret = WSAStartup(version, &retdata))
+ fatal ("Unable to locate winsock library!\n");
+ if (LOBYTE(retdata.wVersion) != 1)
+ fatal("could not find version 1 of winsock dll\n");
+
+ if (HIBYTE(retdata.wVersion) != 1)
+ fatal("could not find version 1 of winsock dll\n");
+
+ atexit((void (*)(void)) WSACleanup);
+}
+
+#undef accept
+
+SOCKET
+myaccept (SOCKET s, struct sockaddr *addr, int *addrlen)
+{
+ SOCKET r;
+
+ if (!NtSocketsInitialized++) {
+ StartSockets();
+ }
+ if ((r = accept (s, addr, addrlen)) == INVALID_SOCKET)
+ errno = WSAGetLastError();
+ return r;
+}
+
+#undef bind
+
+int
+mybind (SOCKET s, struct sockaddr *addr, int addrlen)
+{
+ int r;
+
+ if (!NtSocketsInitialized++) {
+ StartSockets();
+ }
+ if ((r = bind (s, addr, addrlen)) == SOCKET_ERROR)
+ errno = WSAGetLastError();
+ return r;
+}
+
+#undef connect
+
+int
+myconnect (SOCKET s, struct sockaddr *addr, int addrlen)
+{
+ int r;
+ if (!NtSocketsInitialized++) {
+ StartSockets();
+ }
+ if ((r = connect (s, addr, addrlen)) == SOCKET_ERROR)
+ errno = WSAGetLastError();
+ return r;
+}
+
+
+#undef getpeername
+
+int
+mygetpeername (SOCKET s, struct sockaddr *addr, int *addrlen)
+{
+ int r;
+ if (!NtSocketsInitialized++) {
+ StartSockets();
+ }
+ if ((r = getpeername (s, addr, addrlen)) == SOCKET_ERROR)
+ errno = WSAGetLastError();
+ return r;
+}
+
+#undef getsockname
+
+int
+mygetsockname (SOCKET s, struct sockaddr *addr, int *addrlen)
+{
+ int r;
+ if (!NtSocketsInitialized++) {
+ StartSockets();
+ }
+ if ((r = getsockname (s, addr, addrlen)) == SOCKET_ERROR)
+ errno = WSAGetLastError();
+ return r;
+}
+
+#undef getsockopt
+
+int
+mygetsockopt (SOCKET s, int level, int optname, char *optval, int *optlen)
+{
+ int r;
+ if (!NtSocketsInitialized++) {
+ StartSockets();
+ }
+ if ((r = getsockopt (s, level, optname, optval, optlen)) == SOCKET_ERROR)
+ errno = WSAGetLastError();
+ return r;
+}
+
+#undef ioctlsocket
+
+int
+myioctlsocket (SOCKET s, long cmd, u_long *argp)
+{
+ int r;
+ if (!NtSocketsInitialized++) {
+ StartSockets();
+ }
+ if ((r = ioctlsocket (s, cmd, argp)) == SOCKET_ERROR)
+ errno = WSAGetLastError();
+ return r;
+}
+
+#undef listen
+
+int
+mylisten (SOCKET s, int backlog)
+{
+ int r;
+ if (!NtSocketsInitialized++) {
+ StartSockets();
+ }
+ if ((r = listen (s, backlog)) == SOCKET_ERROR)
+ errno = WSAGetLastError();
+ return r;
+}
+
+#undef recv
+
+int
+myrecv (SOCKET s, char *buf, int len, int flags)
+{
+ int r;
+ if (!NtSocketsInitialized++) {
+ StartSockets();
+ }
+ if ((r = recv (s, buf, len, flags)) == SOCKET_ERROR)
+ errno = WSAGetLastError();
+ return r;
+}
+
+#undef recvfrom
+
+int
+myrecvfrom (SOCKET s, char *buf, int len, int flags,
+ struct sockaddr *from, int *fromlen)
+{
+ int r;
+ if (!NtSocketsInitialized++) {
+ StartSockets();
+ }
+ if ((r = recvfrom (s, buf, len, flags, from, fromlen)) == SOCKET_ERROR)
+ errno = WSAGetLastError();
+ return r;
+}
+
+#undef send
+
+int
+mysend (SOCKET s, char *buf, int len, int flags)
+{
+ int r;
+ if (!NtSocketsInitialized++) {
+ StartSockets();
+ }
+ if ((r = send (s, buf, len, flags)) == SOCKET_ERROR)
+ errno = WSAGetLastError();
+ return r;
+}
+
+#undef sendto
+
+int
+mysendto (SOCKET s, char *buf, int len, int flags,
+ struct sockaddr *to, int tolen)
+{
+ int r;
+ if (!NtSocketsInitialized++) {
+ StartSockets();
+ }
+ if ((r = sendto (s, buf, len, flags, to, tolen)) == SOCKET_ERROR)
+ errno = WSAGetLastError();
+ return r;
+}
+
+#undef setsockopt
+
+int
+mysetsockopt (SOCKET s, int level, int optname, char *optval, int optlen)
+{
+ int r;
+ if (!NtSocketsInitialized++) {
+ StartSockets();
+ }
+ if ((r = setsockopt (s, level, optname, optval, optlen)) == SOCKET_ERROR)
+ errno = WSAGetLastError();
+ return r;
+}
+
+#undef shutdown
+
+int
+myshutdown (SOCKET s, int how)
+{
+ int r;
+ if (!NtSocketsInitialized++) {
+ StartSockets();
+ }
+ if ((r = shutdown (s, how)) == SOCKET_ERROR)
+ errno = WSAGetLastError();
+ return r;
+}
+
+#undef socket
+
+SOCKET
+mysocket (int af, int type, int protocol)
+{
+ SOCKET s;
+ if (!NtSocketsInitialized++) {
+ StartSockets();
+ }
+ if ((s = socket (af, type, protocol)) == INVALID_SOCKET)
+ errno = WSAGetLastError();
+ return s;
+}
+
+#undef gethostbyaddr
+
+struct hostent *
+mygethostbyaddr (char *addr, int len, int type)
+{
+ struct hostent *r;
+ if (!NtSocketsInitialized++) {
+ StartSockets();
+ }
+ if ((r = gethostbyaddr (addr, len, type)) == NULL)
+ errno = WSAGetLastError();
+ return r;
+}
+
+#undef gethostbyname
+
+struct hostent *
+mygethostbyname (char *name)
+{
+ struct hostent *r;
+ if (!NtSocketsInitialized++) {
+ StartSockets();
+ }
+ if ((r = gethostbyname (name)) == NULL)
+ errno = WSAGetLastError();
+ return r;
+}
+
+#undef gethostname
+
+int
+mygethostname (char *name, int len)
+{
+ int r;
+ if (!NtSocketsInitialized++) {
+ StartSockets();
+ }
+ if ((r = gethostname (name, len)) == SOCKET_ERROR)
+ errno = WSAGetLastError();
+ return r;
+}
+
+#undef getprotobyname
+
+struct protoent *
+mygetprotobyname (char *name)
+{
+ struct protoent *r;
+ if (!NtSocketsInitialized++) {
+ StartSockets();
+ }
+ if ((r = getprotobyname (name)) == NULL)
+ errno = WSAGetLastError();
+ return r;
+}
+
+#undef getprotobynumber
+
+struct protoent *
+mygetprotobynumber (int num)
+{
+ struct protoent *r;
+ if (!NtSocketsInitialized++) {
+ StartSockets();
+ }
+ if ((r = getprotobynumber (num)) == NULL)
+ errno = WSAGetLastError();
+ return r;
+}
+
+#undef getservbyname
+
+struct servent *
+mygetservbyname (char *name, char *proto)
+{
+ struct servent *r;
+ if (!NtSocketsInitialized++) {
+ StartSockets();
+ }
+ if ((r = getservbyname (name, proto)) == NULL)
+ errno = WSAGetLastError();
+ return r;
+}
+
+#undef getservbyport
+
+struct servent *
+mygetservbyport (int port, char *proto)
+{
+ struct servent *r;
+ if (!NtSocketsInitialized++) {
+ StartSockets();
+ }
+ if ((r = getservbyport (port, proto)) == NULL)
+ errno = WSAGetLastError();
+ return r;
+}
+
+//
+// Networking stubs
+//
+
+void endhostent() {}
+void endnetent() {}
+void endprotoent() {}
+void endservent() {}
+
+struct netent *getnetent (void) {return (struct netent *) NULL;}
+
+struct netent *getnetbyaddr(char *name) {return (struct netent *)NULL;}
+
+struct netent *getnetbyname(long net, int type) {return (struct netent *)NULL;}
+
+struct protoent *getprotoent (void) {return (struct protoent *) NULL;}
+
+struct servent *getservent (void) {return (struct servent *) NULL;}
+
+void sethostent (int stayopen) {}
+
+void setnetent (int stayopen) {}
+
+void setprotoent (int stayopen) {}
+
+void setservent (int stayopen) {}
+
+
+pid_t
+waitpid (pid_t pid, int *stat_loc, int options)
+{
+ DWORD timeout;
+
+ if (options == WNOHANG) {
+ timeout = 0;
+ } else {
+ timeout = INFINITE;
+ }
+ if (WaitForSingleObject((HANDLE) pid, timeout) == WAIT_OBJECT_0) {
+ pid = _cwait(stat_loc, pid, 0);
+ return pid;
+ }
+ return 0;
+}
+
+#include <sys/timeb.h>
+
+void _cdecl
+gettimeofday(struct timeval *tv, struct timezone *tz)
+{
+ struct timeb tb;
+
+ ftime(&tb);
+ tv->tv_sec = tb.time;
+ tv->tv_usec = tb.millitm * 1000;
+}
+
+char *
+getcwd(buffer, size)
+ char *buffer;
+ int size;
+{
+ int length;
+ char *pb;
+
+ if (_getcwd(buffer, size) == NULL) {
+ return NULL;
+ }
+ length = strlen(buffer);
+ if (length >= size) {
+ return NULL;
+ }
+
+ for (bp = buffer; *bp != '\0'; bp++) {
+ if (*bp == '\\') {
+ *bp = '/';
+ }
+ }
+ return buffer;
+}