contrib/file-4/src/apptype.c

   1 /*
   2  * Adapted from: apptype.c, Written by Eberhard Mattes and put into the
   3  * public domain
   4  *
   5  * Notes: 1. Qualify the filename so that DosQueryAppType does not do extraneous
   6  * searches.
   7  *
   8  * 2. DosQueryAppType will return FAPPTYP_DOS on a file ending with ".com"
   9  * (other than an OS/2 exe or Win exe with this name). Eberhard Mattes
  10  * remarks Tue, 6 Apr 93: Moreover, it reports the type of the (new and very
  11  * bug ridden) Win Emacs as "OS/2 executable".
  12  *
  13  * 3. apptype() uses the filename if given, otherwise a tmp file is created with
  14  * the contents of buf. If buf is not the complete file, apptype can
  15  * incorrectly identify the exe type. The "-z" option of "file" is the reason
  16  * for this ugly code.
  17  */
  18
  19 /*
  20  * amai: Darrel Hankerson did the changes described here.
  21  *
  22  * It remains to check the validity of comments (2.) since it's referred to an
  23  * "old" OS/2 version.
  24  *
  25  */
  26
  27 #include "file.h"
  28
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32
  33
  34 #ifndef lint
  35 FILE_RCSID("@(#)$Id: apptype.c,v 1.6 2003/11/11 20:01:45 christos Exp $")
  36 #endif /* lint */
  37
  38 #ifdef __EMX__
  39 #include <io.h>
  40 #define INCL_DOSSESMGR
  41 #define INCL_DOSERRORS
  42 #define INCL_DOSFILEMGR
  43 #include <os2.h>
  44 typedef ULONG   APPTYPE;
  45
  46 protected int
  47 file_os2_apptype(struct magic_set *ms, const char *fn, const void *buf,
  48     size_t nb)
  49 {
  50         APPTYPE         rc, type;
  51         char            path[_MAX_PATH], drive[_MAX_DRIVE], dir[_MAX_DIR],
  52                         fname[_MAX_FNAME], ext[_MAX_EXT];
  53         char           *filename;
  54         FILE           *fp;
  55
  56         if (fn)
  57                 filename = strdup(fn);
  58         else if ((filename = tempnam("./", "tmp")) == NULL) {
  59                 file_error(ms, errno, "cannot create tempnam");
  60                 return -1;
  61         }
  62         /* qualify the filename to prevent extraneous searches */
  63         _splitpath(filename, drive, dir, fname, ext);
  64         (void)sprintf(path, "%s%s%s%s", drive,
  65                 (*dir == '\0') ? "./" : dir,
  66                 fname,
  67                 (*ext == '\0') ? "." : ext);
  68
  69         if (fn == NULL) {
  70                 if ((fp = fopen(path, "wb")) == NULL) {
  71                         file_error(ms, errno, "cannot open tmp file `%s'", path);
  72                         return -1;
  73                 }
  74                 if (fwrite(buf, 1, nb, fp) != nb) {
  75                         file_error(ms, errno, "cannot write tmp file `%s'",
  76                             path);
  77                         return -1;
  78                 }
  79                 (void)fclose(fp);
  80         }
  81         rc = DosQueryAppType(path, &type);
  82
  83         if (fn == NULL) {
  84                 unlink(path);
  85                 free(filename);
  86         }
  87 #if 0
  88         if (rc == ERROR_INVALID_EXE_SIGNATURE)
  89                 printf("%s: not an executable file\n", fname);
  90         else if (rc == ERROR_FILE_NOT_FOUND)
  91                 printf("%s: not found\n", fname);
  92         else if (rc == ERROR_ACCESS_DENIED)
  93                 printf("%s: access denied\n", fname);
  94         else if (rc != 0)
  95                 printf("%s: error code = %lu\n", fname, rc);
  96         else
  97 #else
  98
  99         /*
 100          * for our purpose here it's sufficient to just ignore the error and
 101          * return w/o success (=0)
 102          */
 103
 104         if (rc)
 105                 return (0);
 106
 107 #endif
 108
 109         if (type & FAPPTYP_32BIT)
 110                 if (file_printf(ms, "32-bit ") == -1)
 111                         return -1;
 112         if (type & FAPPTYP_PHYSDRV) {
 113                 if (file_printf(ms, "physical device driver") == -1)
 114                         return -1;
 115         } else if (type & FAPPTYP_VIRTDRV) {
 116                 if (file_printf(ms, "virtual device driver") == -1)
 117                         return -1;
 118         } else if (type & FAPPTYP_DLL) {
 119                 if (type & FAPPTYP_PROTDLL)
 120                         if (file_printf(ms, "protected ") == -1)
 121                                 return -1;
 122                 if (file_printf(ms, "DLL") == -1)
 123                         return -1;
 124         } else if (type & (FAPPTYP_WINDOWSREAL | FAPPTYP_WINDOWSPROT)) {
 125                 if (file_printf(ms, "Windows executable") == -1)
 126                         return -1;
 127         } else if (type & FAPPTYP_DOS) {
 128                 /*
 129                  * The API routine is partially broken on filenames ending
 130                  * ".com".
 131                  */
 132                 if (stricmp(ext, ".com") == 0)
 133                         if (strncmp((const char *)buf, "MZ", 2))
 134                                 return (0);
 135                 if (file_printf(ms, "DOS executable") == -1)
 136                         return -1;
 137                 /* ---------------------------------------- */
 138                 /* Might learn more from the magic(4) entry */
 139                 if (file_printf(ms, ", magic(4)-> ") == -1)
 140                         return -1;
 141                 return (0);
 142                 /* ---------------------------------------- */
 143         } else if (type & FAPPTYP_BOUND) {
 144                 if (file_printf(ms, "bound executable") == -1)
 145                         return -1;
 146         } else if ((type & 7) == FAPPTYP_WINDOWAPI) {
 147                 if (file_printf(ms, "PM executable") == -1)
 148                         return -1;
 149         } else if (file_printf(ms, "OS/2 executable") == -1)
 150                 return -1;
 151
 152         switch (type & (FAPPTYP_NOTWINDOWCOMPAT |
 153                         FAPPTYP_WINDOWCOMPAT |
 154                         FAPPTYP_WINDOWAPI)) {
 155         case FAPPTYP_NOTWINDOWCOMPAT:
 156                 if (file_printf(ms, " [NOTWINDOWCOMPAT]") == -1)
 157                         return -1;
 158                 break;
 159         case FAPPTYP_WINDOWCOMPAT:
 160                 if (file_printf(ms, " [WINDOWCOMPAT]") == -1)
 161                         return -1;
 162                 break;
 163         case FAPPTYP_WINDOWAPI:
 164                 if (file_printf(ms, " [WINDOWAPI]") == -1)
 165                         return -1;
 166                 break;
 167         }
 168         return 1;
 169 }
 170 #endif