jim-readdir.c

   1
   2 /*
   3  * Tcl readdir command.
   4  *
   5  * (c) 2008 Steve Bennett <steveb@worware.net.au>
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above
  14  *    copyright notice, this list of conditions and the following
  15  *    disclaimer in the documentation and/or other materials
  16  *    provided with the distribution.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE JIM TCL PROJECT ``AS IS'' AND ANY
  19  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  20  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  21  * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  22  * JIM TCL PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  23  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  24  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  27  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  29  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  *
  31  * The views and conclusions contained in the software and documentation
  32  * are those of the authors and should not be interpreted as representing
  33  * official policies, either expressed or implied, of the Jim Tcl Project.
  34  *
  35  * Based on original work by:
  36  *-----------------------------------------------------------------------------
  37  * Copyright 1991-1994 Karl Lehenbauer and Mark Diekhans.
  38  *
  39  * Permission to use, copy, modify, and distribute this software and its
  40  * documentation for any purpose and without fee is hereby granted, provided
  41  * that the above copyright notice appear in all copies.  Karl Lehenbauer and
  42  * Mark Diekhans make no representations about the suitability of this
  43  * software for any purpose.  It is provided "as is" without express or
  44  * implied warranty.
  45  *-----------------------------------------------------------------------------
  46  */
  47
  48 #include <errno.h>
  49 #include <stdio.h>
  50 #include <string.h>
  51
  52 #include <jim.h>
  53 #include <jimautoconf.h>
  54
  55 #ifdef HAVE_DIRENT_H
  56 #include <dirent.h>
  57 #endif
  58
  59 /*
  60  *-----------------------------------------------------------------------------
  61  *
  62  * Jim_ReaddirCmd --
  63  *     Implements the rename TCL command:
  64  *         readdir ?-nocomplain? dirPath
  65  *
  66  * Results:
  67  *      Standard TCL result.
  68  *-----------------------------------------------------------------------------
  69  */
  70 int Jim_ReaddirCmd(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
  71 {
  72     const char *dirPath;
  73     DIR *dirPtr;
  74     struct dirent *entryPtr;
  75     int nocomplain = 0;
  76
  77     if (argc == 3 && Jim_CompareStringImmediate(interp, argv[1], "-nocomplain")) {
  78         nocomplain = 1;
  79     }
  80     if (argc != 2 && !nocomplain) {
  81         Jim_WrongNumArgs(interp, 1, argv, "?-nocomplain? dirPath");
  82         return JIM_ERR;
  83     }
  84
  85     dirPath = Jim_String(argv[1 + nocomplain]);
  86
  87     dirPtr = opendir(dirPath);
  88     if (dirPtr == NULL) {
  89         if (nocomplain) {
  90             return JIM_OK;
  91         }
  92         Jim_SetResultString(interp, strerror(errno), -1);
  93         return JIM_ERR;
  94     }
  95     Jim_SetResultString(interp, strerror(errno), -1);
  96
  97     Jim_SetResult(interp, Jim_NewListObj(interp, NULL, 0));
  98
  99     while ((entryPtr = readdir(dirPtr)) != NULL) {
 100         if (entryPtr->d_name[0] == '.') {
 101             if (entryPtr->d_name[1] == '\0') {
 102                 continue;
 103             }
 104             if ((entryPtr->d_name[1] == '.') && (entryPtr->d_name[2] == '\0'))
 105                 continue;
 106         }
 107         Jim_ListAppendElement(interp, Jim_GetResult(interp), Jim_NewStringObj(interp,
 108                 entryPtr->d_name, -1));
 109     }
 110     closedir(dirPtr);
 111
 112     return JIM_OK;
 113 }
 114
 115 int Jim_readdirInit(Jim_Interp *interp)
 116 {
 117     if (Jim_PackageProvide(interp, "readdir", "1.0", JIM_ERRMSG))
 118         return JIM_ERR;
 119
 120     Jim_CreateCommand(interp, "readdir", Jim_ReaddirCmd, NULL, NULL);
 121     return JIM_OK;
 122 }