source: vendor/current/source4/ntvfs/simple/svfs_util.c@ 740

/* 
   Unix SMB/CIFS implementation.

   simple NTVFS filesystem backend

   Copyright (C) Andrew Tridgell 2003

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
/*
  utility functions for simple backend
*/

#include "includes.h"
#include "system/filesys.h"
#include "svfs.h"
#include "system/time.h"
#include "system/dir.h"
#include "ntvfs/ntvfs.h"
#include "ntvfs/simple/proto.h"

/*
  convert a windows path to a unix path - don't do any manging or case sensitive handling
*/
char *svfs_unix_path(struct ntvfs_module_context *ntvfs,
                     struct ntvfs_request *req, const char *name)
{
        struct svfs_private *p = ntvfs->private_data;
        char *ret;

        if (*name != '\\') {
                ret = talloc_asprintf(req, "%s/%s", p->connectpath, name);
        } else {
                ret = talloc_asprintf(req, "%s%s", p->connectpath, name);
        }
        all_string_sub(ret, "\\", "/", 0);

        strlower(ret + strlen(p->connectpath));

        return ret;
}


/*
  read a directory and find all matching file names and stat info
  returned names are separate unix and DOS names. The returned names
  are relative to the directory
*/
struct svfs_dir *svfs_list_unix(TALLOC_CTX *mem_ctx, struct ntvfs_request *req, const char *unix_path)
{
        char *p, *mask;
        struct svfs_dir *dir;
        DIR *odir;
        struct dirent *dent;
        unsigned int allocated = 0;
        char *low_mask;

        dir = talloc(mem_ctx, struct svfs_dir);
        if (!dir) { return NULL; }

        dir->count = 0;
        dir->files = 0;

        /* find the base directory */
        p = strrchr(unix_path, '/');
        if (!p) { return NULL; }

        dir->unix_dir = talloc_strndup(mem_ctx, unix_path, PTR_DIFF(p, unix_path));
        if (!dir->unix_dir) { return NULL; }

        /* the wildcard pattern is the last part */
        mask = p+1;

        low_mask = talloc_strdup(mem_ctx, mask);
        if (!low_mask) { return NULL; }
        strlower(low_mask);

        odir = opendir(dir->unix_dir);
        if (!odir) { return NULL; }

        while ((dent = readdir(odir))) {
                unsigned int i = dir->count;
                char *full_name;
                char *low_name;

                if (strchr(dent->d_name, ':') && !strchr(unix_path, ':')) {
                        /* don't show streams in dir listing */
                        continue;
                }

                low_name = talloc_strdup(mem_ctx, dent->d_name);
                if (!low_name) { continue; }
                strlower(low_name);

                /* check it matches the wildcard pattern */
                if (ms_fnmatch(low_mask, low_name, PROTOCOL_NT1) != 0) {
                        continue;
                }
                
                if (dir->count >= allocated) {
                        allocated = (allocated + 100) * 1.2;
                        dir->files = talloc_realloc(dir, dir->files, struct svfs_dirfile, allocated);
                        if (!dir->files) { 
                                closedir(odir);
                                return NULL;
                        }
                }

                dir->files[i].name = low_name;
                if (!dir->files[i].name) { continue; }

                full_name = talloc_asprintf(mem_ctx, "%s/%s", dir->unix_dir,
                                            dir->files[i].name);
                if (!full_name) { continue; }

                if (stat(full_name, &dir->files[i].st) == 0) { 
                        dir->count++;
                }

                talloc_free(full_name);
        }

        closedir(odir);

        return dir;
}

/*
  read a directory and find all matching file names and stat info
  returned names are separate unix and DOS names. The returned names
  are relative to the directory
*/
struct svfs_dir *svfs_list(struct ntvfs_module_context *ntvfs, struct ntvfs_request *req, const char *pattern)
{
        struct svfs_private *p = ntvfs->private_data;
        char *unix_path;

        unix_path = svfs_unix_path(ntvfs, req, pattern);
        if (!unix_path) { return NULL; }

        return svfs_list_unix(p, req, unix_path);
}


/*******************************************************************
set the time on a file via file descriptor
*******************************************************************/
int svfs_file_utime(int fd, struct utimbuf *times)
{
        char *fd_path = NULL;
        int ret;

        asprintf(&fd_path, "/proc/self/%d", fd);
        if (!fd_path) {
                errno = ENOMEM;
                return -1;
        }
        
        ret = utime(fd_path, times);
        free(fd_path);
        return ret;
}


/*
  map a unix file attrib to a DOS attribute
*/
uint16_t svfs_unix_to_dos_attrib(mode_t mode)
{
        uint16_t ret = 0;
        if (S_ISDIR(mode)) ret |= FILE_ATTRIBUTE_DIRECTORY;
        if (!(mode & S_IWUSR)) ret |= FILE_ATTRIBUTE_READONLY;
        return ret;
}