Mercurial > dwindows
view os2/dirent.c @ 2222:f1241b668611
Win: Create an NTFS junction to Edge Stable to avoid WebView2 path blacklist.
This may only work on Windows 10 for now, since the mklink command may only be
available on Windows 10. Will update _DWCreateJunction() to work on earlier
versions of Windows if necessary.
author | bsmith@81767d24-ef19-dc11-ae90-00e081727c95 |
---|---|
date | Wed, 23 Dec 2020 09:52:06 +0000 |
parents | 6baf177f335c |
children |
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#include <stdio.h> #include <stdlib.h> #include <string.h> #include <ctype.h> #define INCL_DOSFILEMGR #define INCL_DOSERRORS #include "dwcompat.h" #include <errno.h> #ifdef __WATCOMC__ #include "platform\dirent.h" typedef struct _dirdescr DIRW; #define DIR DIRW #endif # define FFBUF FILEFINDBUF3 # define Word ULONG /* * LS20 recommends a request count of 100, but according to the * APAR text it does not lead to missing files, just to funny * numbers of returned entries. * * LS30 HPFS386 requires a count greater than 2, or some files * are missing (those starting with a character less that '.'). * * Novell looses entries which overflow the buffer. In previous * versions of dirent2, this could have lead to missing files * when the average length of 100 directory entries was 40 bytes * or more (quite unlikely for files on a Novell server). * * Conclusion: Make sure that the entries all fit into the buffer * and that the buffer is large enough for more than 2 entries * (each entry is at most 300 bytes long). And ignore the LS20 * effect. */ # define Count 25 # define BufSz (25 * (sizeof(FILEFINDBUF3)+1)) #if defined(__IBMC__) || defined(__IBMCPP__) #define error(rc) _doserrno = rc, errno = EOS2ERR #else #define error(rc) errno = 255 #endif struct _dirdescr { HDIR handle; /* DosFindFirst handle */ char fstype; /* filesystem type */ Word count; /* valid entries in <ffbuf> */ long number; /* absolute number of next entry */ int index; /* relative number of next entry */ FFBUF * next; /* pointer to next entry */ char name[MAXPATHLEN+3]; /* directory name */ unsigned attrmask; /* attribute mask for seekdir */ struct dirent entry; /* buffer for directory entry */ BYTE ffbuf[BufSz]; }; /* * Return first char of filesystem type, or 0 if unknown. */ static char API getFSType(const char *path) { static char cache[1+26]; char drive[3], info[512]; Word unit, infolen; char r; if (isalpha((int)path[0]) && path[1] == ':') { unit = toupper(path[0]) - '@'; path += 2; } else { ULONG driveMap; if (DosQueryCurrentDisk(&unit, &driveMap)) return 0; } if ((path[0] == '\\' || path[0] == '/') && (path[1] == '\\' || path[1] == '/')) return 0; if (cache [unit]) return cache [unit]; drive[0] = '@' + unit; drive[1] = ':'; drive[2] = '\0'; infolen = sizeof info; if (DosQueryFSAttach((PSZ)drive, 0, FSAIL_QUERYNAME, (PVOID)info, &infolen)) return 0; if (infolen >= sizeof(FSQBUFFER2)) { FSQBUFFER2 *p = (FSQBUFFER2 *)info; r = p->szFSDName[p->cbName]; } else r = 0; return cache [unit] = r; } char * API _abs_path(const char *name, char *buffer, int len) { char buf[4]; if (isalpha((int)name[0]) && name[1] == ':' && name[2] == '\0') { buf[0] = name[0]; buf[1] = name[1]; buf[2] = '.'; buf[3] = '\0'; name = buf; } if (DosQueryPathInfo((PSZ)name, FIL_QUERYFULLNAME, buffer, len)) return NULL; return buffer; } DIR * API _openxdir(const char *path, unsigned att_mask) { DIR *dir; char name[MAXPATHLEN+3]; Word rc; if(!path) return NULL; dir = malloc(sizeof(DIR)); if (dir == NULL) { errno = ENOMEM; return NULL; } strncpy(name, path, MAXPATHLEN); name[MAXPATHLEN] = '\0'; switch (name[strlen(name)-1]) { default: strcat(name, "\\"); case '\\': case '/': case ':': ; } strcat(name, "."); if (!abs_path(name, dir->name, MAXPATHLEN+1)) strcpy(dir->name, name); if (dir->name[strlen(dir->name)-1] == '\\') strcat(dir->name, "*"); else strcat(dir->name, "\\*"); dir->fstype = getFSType(dir->name); dir->attrmask = att_mask | A_DIR; dir->handle = HDIR_CREATE; dir->count = 100; rc = DosFindFirst((PSZ)dir->name, &dir->handle, dir->attrmask, dir->ffbuf, sizeof dir->ffbuf, &dir->count, FIL_STANDARD); switch (rc) { default: free(dir); error(rc); return NULL; case NO_ERROR: case ERROR_NO_MORE_FILES: ; } dir->number = 0; dir->index = 0; dir->next = (FFBUF *)dir->ffbuf; return (DIR *)dir; } DIR * API _opendir(const char *pathname) { return openxdir(pathname, 0); } struct dirent * API _readdir(DIR *dir) { static int dummy_ino = 2; if (dir->index == dir->count) { Word rc; dir->count = 100; rc = DosFindNext(dir->handle, dir->ffbuf, sizeof dir->ffbuf, &dir->count); if (rc) { error(rc); return NULL; } dir->index = 0; dir->next = (FFBUF *)dir->ffbuf; } if (dir->index == dir->count) return NULL; memcpy(dir->entry.d_name, dir->next->achName, dir->next->cchName); dir->entry.d_name[dir->next->cchName] = '\0'; dir->entry.d_ino = dummy_ino++; dir->entry.d_reclen = dir->next->cchName; dir->entry.d_namlen = dir->next->cchName; dir->entry.d_size = dir->next->cbFile; dir->entry.d_attribute = dir->next->attrFile; dir->entry.d_time = *(USHORT *)&dir->next->ftimeLastWrite; dir->entry.d_date = *(USHORT *)&dir->next->fdateLastWrite; switch (dir->fstype) { case 'F': /* FAT */ case 'C': /* CDFS */ if (dir->next->attrFile & FILE_DIRECTORY) strupr(dir->entry.d_name); else strlwr(dir->entry.d_name); } dir->next = (FFBUF *)((BYTE *)dir->next + dir->next->oNextEntryOffset); ++dir->number; ++dir->index; return &dir->entry; } long API _telldir(DIR *dir) { return dir->number; } void API _seekdir(DIR *dir, long off) { if (dir->number > off) { char name[MAXPATHLEN+2]; Word rc; DosFindClose(dir->handle); strcpy(name, dir->name); strcat(name, "*"); dir->handle = HDIR_CREATE; dir->count = 32767; rc = DosFindFirst((PSZ)name, &dir->handle, dir->attrmask, dir->ffbuf, sizeof dir->ffbuf, &dir->count, FIL_STANDARD); switch (rc) { default: error(rc); return; case NO_ERROR: case ERROR_NO_MORE_FILES: ; } dir->number = 0; dir->index = 0; dir->next = (FFBUF *)dir->ffbuf; } while (dir->number < off && readdir(dir)) ; } void API _closedir(DIR *dir) { DosFindClose(dir->handle); free(dir); } /*****************************************************************************/ #ifdef TEST main(int argc, char **argv) { int i; DIR *dir; struct dirent *ep; for (i = 1; i < argc; ++i) { dir = opendir(argv[i]); if (!dir) continue; while (ep = readdir(dir)) if (strchr("\\/:", argv[i] [strlen(argv[i]) - 1])) printf("%s%s\n", argv[i], ep->d_name); else printf("%s/%s\n", argv[i], ep->d_name); closedir(dir); } return 0; } #endif