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Sourcecode: samba-doc-ja version File versions

smbw_dir.c

/* 
   Unix SMB/Netbios implementation.
   Version 2.0
   SMB wrapper directory functions
   Copyright (C) Andrew Tridgell 1998
   
   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 2 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, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include "includes.h"
#include "realcalls.h"

extern pstring smbw_cwd;
extern fstring smbw_prefix;

static struct smbw_dir *smbw_dirs;

extern struct bitmap *smbw_file_bmap;

extern int smbw_busy;

/***************************************************** 
map a fd to a smbw_dir structure
*******************************************************/
struct smbw_dir *smbw_dir(int fd)
{
      struct smbw_dir *dir;

      for (dir=smbw_dirs;dir;dir=dir->next) {
            if (dir->fd == fd) return dir;
      }
      return NULL;
}

/***************************************************** 
check if a DIR* is one of ours
*******************************************************/
int smbw_dirp(DIR *dirp)
{
      struct smbw_dir *d = (struct smbw_dir *)dirp;
      struct smbw_dir *dir;

      for (dir=smbw_dirs;dir;dir=dir->next) {
            if (dir == d) return 1;
      }
      return 0;
}

/***************************************************** 
free a smbw_dir structure and all entries
*******************************************************/
static void free_dir(struct smbw_dir *dir)
{
      SAFE_FREE(dir->list);
      SAFE_FREE(dir->path);
      ZERO_STRUCTP(dir);
      SAFE_FREE(dir);
}


static struct smbw_dir *cur_dir;

/***************************************************** 
add a entry to a directory listing
*******************************************************/
static void smbw_dir_add(struct file_info *finfo, const char *mask, void *state)
{
      DEBUG(5,("%s\n", finfo->name));

      if (cur_dir->malloced == cur_dir->count) {
            cur_dir->list = (struct file_info *)Realloc(cur_dir->list, 
                                              sizeof(cur_dir->list[0])*
                                              (cur_dir->count+100));
            if (!cur_dir->list) {
                  /* oops */
                  return;
            }
            cur_dir->malloced += 100;
      }

      cur_dir->list[cur_dir->count] = *finfo;
      cur_dir->count++;
}

/***************************************************** 
add a entry to a directory listing
*******************************************************/
static void smbw_share_add(const char *share, uint32 type, 
                           const char *comment, void *state)
{
      struct file_info finfo;

      if (strcmp(share,"IPC$") == 0) return;

      ZERO_STRUCT(finfo);

      pstrcpy(finfo.name, share);
      finfo.mode = aRONLY | aDIR;   

      smbw_dir_add(&finfo, NULL, NULL);
}


/***************************************************** 
add a server to a directory listing
*******************************************************/
static void smbw_server_add(const char *name, uint32 type, 
                      const char *comment, void *state)
{
      struct file_info finfo;

      ZERO_STRUCT(finfo);

      pstrcpy(finfo.name, name);
      finfo.mode = aRONLY | aDIR;   

      smbw_dir_add(&finfo, NULL, NULL);
}


/***************************************************** 
add a entry to a directory listing
*******************************************************/
static void smbw_printjob_add(struct print_job_info *job)
{
      struct file_info finfo;

      ZERO_STRUCT(finfo);

      pstrcpy(finfo.name, job->name);
      finfo.mode = aRONLY | aDIR;   
      finfo.mtime = job->t;
      finfo.atime = job->t;
      finfo.ctime = job->t;
      finfo.uid = nametouid(job->user);
      finfo.mode = aRONLY;
      finfo.size = job->size;

      smbw_dir_add(&finfo, NULL, NULL);
}


/***************************************************** 
open a directory on the server
*******************************************************/
int smbw_dir_open(const char *fname)
{
      fstring server, share;
      pstring path;
      struct smbw_server *srv=NULL;
      struct smbw_dir *dir=NULL;
      pstring mask;
      int fd;
      char *s, *p;

      if (!fname) {
            errno = EINVAL;
            return -1;
      }

      smbw_init();

      /* work out what server they are after */
      s = smbw_parse_path(fname, server, share, path);

      DEBUG(4,("dir_open share=%s\n", share));

      /* get a connection to the server */
      srv = smbw_server(server, share);
      if (!srv) {
            /* smbw_server sets errno */
            goto failed;
      }

      dir = (struct smbw_dir *)malloc(sizeof(*dir));
      if (!dir) {
            errno = ENOMEM;
            goto failed;
      }

      ZERO_STRUCTP(dir);

      cur_dir = dir;

      slprintf(mask, sizeof(mask)-1, "%s\\*", path);
      all_string_sub(mask,"\\\\","\\",0);

      if ((p=strstr(srv->server_name,"#01"))) {
            *p = 0;
            smbw_server_add(".",0,"",NULL);
            smbw_server_add("..",0,"",NULL);
            cli_NetServerEnum(&srv->cli, srv->server_name, SV_TYPE_DOMAIN_ENUM,
                          smbw_server_add,NULL);
            *p = '#';
      } else if ((p=strstr(srv->server_name,"#1D"))) {
            DEBUG(4,("doing NetServerEnum\n"));
            *p = 0;
            smbw_server_add(".",0,"",NULL);
            smbw_server_add("..",0,"",NULL);
            cli_NetServerEnum(&srv->cli, srv->server_name, SV_TYPE_ALL,
                          smbw_server_add,NULL);
            *p = '#';
      } else if (strcmp(srv->cli.dev,"IPC") == 0) {
            DEBUG(4,("doing NetShareEnum\n"));
            smbw_share_add(".",0,"",NULL);
            smbw_share_add("..",0,"",NULL);
            if (cli_RNetShareEnum(&srv->cli, smbw_share_add,NULL) < 0) {
                  errno = smbw_errno(&srv->cli);
                  goto failed;
            }
      } else if (strncmp(srv->cli.dev,"LPT",3) == 0) {
            smbw_share_add(".",0,"",NULL);
            smbw_share_add("..",0,"",NULL);
            if (cli_print_queue(&srv->cli, smbw_printjob_add) < 0) {
                  errno = smbw_errno(&srv->cli);
                  goto failed;
            }
      } else {
#if 0
            if (strcmp(path,"\\") == 0) {
                  smbw_share_add(".",0,"",NULL);
                  smbw_share_add("..",0,"",NULL);
            }
#endif
            if (cli_list(&srv->cli, mask, aHIDDEN|aSYSTEM|aDIR, smbw_dir_add,NULL) < 0) {
                  errno = smbw_errno(&srv->cli);
                  goto failed;
            }
      }

      cur_dir = NULL;
      
      fd = open(SMBW_DUMMY, O_WRONLY);
      if (fd == -1) {
            errno = EMFILE;
            goto failed;
      }

      if (bitmap_query(smbw_file_bmap, fd)) {
            DEBUG(0,("ERROR: fd used in smbw_dir_open\n"));
            errno = EIO;
            goto failed;
      }

      DLIST_ADD(smbw_dirs, dir);
      
      bitmap_set(smbw_file_bmap, fd);

      dir->fd = fd;
      dir->srv = srv;
      dir->path = strdup(s);

      DEBUG(4,("  -> %d\n", dir->count));

      return dir->fd;

 failed:
      if (dir) {
            free_dir(dir);
      }

      return -1;
}

/***************************************************** 
a wrapper for fstat() on a directory
*******************************************************/
int smbw_dir_fstat(int fd, struct stat *st)
{
      struct smbw_dir *dir;

      dir = smbw_dir(fd);
      if (!dir) {
            errno = EBADF;
            return -1;
      }

      ZERO_STRUCTP(st);

      smbw_setup_stat(st, "", dir->count*DIRP_SIZE, aDIR);

      st->st_dev = dir->srv->dev;

      return 0;
}

/***************************************************** 
close a directory handle
*******************************************************/
int smbw_dir_close(int fd)
{
      struct smbw_dir *dir;

      dir = smbw_dir(fd);
      if (!dir) {
            errno = EBADF;
            return -1;
      }

      bitmap_clear(smbw_file_bmap, dir->fd);
      close(dir->fd);
      
      DLIST_REMOVE(smbw_dirs, dir);

      free_dir(dir);

      return 0;
}

/***************************************************** 
a wrapper for getdents()
*******************************************************/
int smbw_getdents(unsigned int fd, struct dirent *dirp, int count)
{
      struct smbw_dir *dir;
      int n=0;

      smbw_busy++;

      dir = smbw_dir(fd);
      if (!dir) {
            errno = EBADF;
            smbw_busy--;
            return -1;
      }

      while (count>=DIRP_SIZE && (dir->offset < dir->count)) {
#if HAVE_DIRENT_D_OFF
            dirp->d_off = (dir->offset+1)*DIRP_SIZE;
#endif
            dirp->d_reclen = DIRP_SIZE;
            dos_to_unix(&dirp->d_name[0], dir->list[dir->offset].name);
            dirp->d_ino = smbw_inode(dir->list[dir->offset].name);
            dir->offset++;
            count -= dirp->d_reclen;
#if HAVE_DIRENT_D_OFF
            if (dir->offset == dir->count) {
                  dirp->d_off = -1;
            }
#endif
            dirp = (struct dirent *)(((char *)dirp) + DIRP_SIZE);
            n++;
      }

      smbw_busy--;
      return n*DIRP_SIZE;
}


/***************************************************** 
a wrapper for chdir()
*******************************************************/
int smbw_chdir(const char *name)
{
      struct smbw_server *srv;
      fstring server, share;
      pstring path;
      uint16 mode = aDIR;
      char *cwd;
      int len;

      smbw_init();

      len = strlen(smbw_prefix);

      if (smbw_busy) return real_chdir(name);

      smbw_busy++;

      if (!name) {
            errno = EINVAL;
            goto failed;
      }

      DEBUG(4,("smbw_chdir(%s)\n", name));

      /* work out what server they are after */
      cwd = smbw_parse_path(name, server, share, path);

      /* a special case - accept cd to /smb */
      if (strncmp(cwd, smbw_prefix, len-1) == 0 &&
          cwd[len-1] == 0) {
            goto success1;
      }

      if (strncmp(cwd,smbw_prefix,strlen(smbw_prefix))) {
            if (real_chdir(cwd) == 0) {
                  goto success2;
            }
            goto failed;
      }

      /* get a connection to the server */
      srv = smbw_server(server, share);
      if (!srv) {
            /* smbw_server sets errno */
            goto failed;
      }

      if (strncmp(srv->cli.dev,"IPC",3) &&
          strncmp(srv->cli.dev,"LPT",3) &&
          !smbw_getatr(srv, path, 
                   &mode, NULL, NULL, NULL, NULL, NULL)) {
            errno = smbw_errno(&srv->cli);
            goto failed;
      }

      if (!(mode & aDIR)) {
            errno = ENOTDIR;
            goto failed;
      }

 success1:
      /* we don't want the old directory to be busy */
      real_chdir("/");

 success2:

      DEBUG(4,("set SMBW_CWD to %s\n", cwd));

      pstrcpy(smbw_cwd, cwd);

      smbw_busy--;
      return 0;

 failed:
      smbw_busy--;
      return -1;
}


/***************************************************** 
a wrapper for lseek() on directories
*******************************************************/
off_t smbw_dir_lseek(int fd, off_t offset, int whence)
{
      struct smbw_dir *dir;
      off_t ret;

      dir = smbw_dir(fd);
      if (!dir) {
            errno = EBADF;
            return -1;
      }

      switch (whence) {
      case SEEK_SET:
            dir->offset = offset/DIRP_SIZE;
            break;
      case SEEK_CUR:
            dir->offset += offset/DIRP_SIZE;
            break;
      case SEEK_END:
            dir->offset = (dir->count * DIRP_SIZE) + offset;
            dir->offset /= DIRP_SIZE;
            break;
      }

      ret = dir->offset * DIRP_SIZE;

      DEBUG(4,("   -> %d\n", (int)ret));

      return ret;
}


/***************************************************** 
a wrapper for mkdir()
*******************************************************/
int smbw_mkdir(const char *fname, mode_t mode)
{
      struct smbw_server *srv;
      fstring server, share;
      pstring path;

      if (!fname) {
            errno = EINVAL;
            return -1;
      }

      smbw_init();

      smbw_busy++;

      /* work out what server they are after */
      smbw_parse_path(fname, server, share, path);

      /* get a connection to the server */
      srv = smbw_server(server, share);
      if (!srv) {
            /* smbw_server sets errno */
            goto failed;
      }

      if (!cli_mkdir(&srv->cli, path)) {
            errno = smbw_errno(&srv->cli);
            goto failed;
      }

      smbw_busy--;
      return 0;

 failed:
      smbw_busy--;
      return -1;
}

/***************************************************** 
a wrapper for rmdir()
*******************************************************/
int smbw_rmdir(const char *fname)
{
      struct smbw_server *srv;
      fstring server, share;
      pstring path;

      if (!fname) {
            errno = EINVAL;
            return -1;
      }

      smbw_init();

      smbw_busy++;

      /* work out what server they are after */
      smbw_parse_path(fname, server, share, path);

      /* get a connection to the server */
      srv = smbw_server(server, share);
      if (!srv) {
            /* smbw_server sets errno */
            goto failed;
      }

      if (!cli_rmdir(&srv->cli, path)) {
            errno = smbw_errno(&srv->cli);
            goto failed;
      }

      smbw_busy--;
      return 0;

 failed:
      smbw_busy--;
      return -1;
}


/***************************************************** 
a wrapper for getcwd()
*******************************************************/
char *smbw_getcwd(char *buf, size_t size)
{
      smbw_init();

      if (smbw_busy) {
            return (char *)real_getcwd(buf, size);
      }

      smbw_busy++;

      if (!buf) {
            if (size <= 0) size = strlen(smbw_cwd)+1;
            buf = (char *)malloc(size);
            if (!buf) {
                  errno = ENOMEM;
                  smbw_busy--;
                  return NULL;
            }
      }

      if (strlen(smbw_cwd) > size-1) {
            errno = ERANGE;
            smbw_busy--;
            return NULL;
      }

      safe_strcpy(buf, smbw_cwd, size);

      smbw_busy--;
      return buf;
}

/***************************************************** 
a wrapper for fchdir()
*******************************************************/
int smbw_fchdir(unsigned int fd)
{
      struct smbw_dir *dir;
      int ret;

      smbw_busy++;

      dir = smbw_dir(fd);
      if (dir) {
            smbw_busy--;
            return chdir(dir->path);
      }     

      ret = real_fchdir(fd);
      if (ret == 0) {
            sys_getwd(smbw_cwd);          
      }

      smbw_busy--;
      return ret;
}

/***************************************************** 
open a directory on the server
*******************************************************/
DIR *smbw_opendir(const char *fname)
{
      int fd;

      smbw_busy++;

      fd = smbw_dir_open(fname);

      if (fd == -1) {
            smbw_busy--;
            return NULL;
      }

      smbw_busy--;

      return (DIR *)smbw_dir(fd);
}

/***************************************************** 
read one entry from a directory
*******************************************************/
struct dirent *smbw_readdir(DIR *dirp)
{
      struct smbw_dir *d = (struct smbw_dir *)dirp;
      static union {
            char buf[DIRP_SIZE];
            struct dirent de;
      } dbuf;

      if (smbw_getdents(d->fd, &dbuf.de, DIRP_SIZE) > 0) 
            return &dbuf.de;

      return NULL;
}

/***************************************************** 
close a DIR*
*******************************************************/
int smbw_closedir(DIR *dirp)
{
      struct smbw_dir *d = (struct smbw_dir *)dirp;
      return smbw_close(d->fd);
}

/***************************************************** 
seek in a directory
*******************************************************/
void smbw_seekdir(DIR *dirp, off_t offset)
{
      struct smbw_dir *d = (struct smbw_dir *)dirp;
      smbw_dir_lseek(d->fd,offset, SEEK_SET);
}

/***************************************************** 
current loc in a directory
*******************************************************/
off_t smbw_telldir(DIR *dirp)
{
      struct smbw_dir *d = (struct smbw_dir *)dirp;
      return smbw_dir_lseek(d->fd,0,SEEK_CUR);
}


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