text: /*
   * Copyright (c) 2013
   *	The President and Fellows of Harvard College.
   *      Written by David A. Holland.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. Neither the name of the University nor the names of its contributors
   *    may be used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE UNIVERSITY OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   */
  
  #include <sys/types.h>
  #include <sys/stat.h>
  #include <stdio.h>
  #include <string.h>
  #include <unistd.h>
  #include <err.h>
  
  #include "data.h"
  #include "name.h"
  #include "do.h"
  
  int
  do_opendir(unsigned name)
  {
  	const char *namestr;
  	int fd;
  
  	namestr = name_get(name);
  	fd = open(namestr, O_RDONLY);
  	if (fd < 0) {
  		err(1, "%s: opendir", namestr);
  	}
  	return fd;
  }
  
  void
  do_closedir(int fd, unsigned name)
  {
  	if (close(fd)) {
  		warn("%s: closedir", name_get(name));
  	}
  }
  
  int
  do_createfile(unsigned name)
  {
  	const char *namestr;
  	int fd;
  
  	namestr = name_get(name);
  	fd = open(namestr, O_WRONLY|O_CREAT|O_EXCL, 0664);
  	if (fd < 0) {
  		err(1, "%s: create", namestr);
  	}
  	tprintf("create %s\n", namestr);
  	return fd;
  }
  
  int
  do_openfile(unsigned name, int dotrunc)
  {
  	const char *namestr;
  	int fd;
  
  	namestr = name_get(name);
  	fd = open(namestr, O_WRONLY | (dotrunc ? O_TRUNC : 0), 0664);
  	if (fd < 0) {
  		err(1, "%s: open", namestr);
  	}
  	return fd;
  }
  
  void
  do_closefile(int fd, unsigned name)
  {
  	if (close(fd)) {
  		warn("%s: close", name_get(name));
  	}
  }
  
  void
  do_write(int fd, unsigned name, unsigned code, unsigned seq,
  	 off_t pos, off_t len)
  {
  	off_t done = 0;
  	ssize_t ret;
  	char *buf;
  	const char *namestr;
  
  	namestr = name_get(name);
  	buf = data_map(code, seq, len);
  	if (lseek(fd, pos, SEEK_SET) == -1) {
  		err(1, "%s: lseek to %lld", name_get(name), pos);
  	}
  
  	while (done < len) {
  		ret = write(fd, buf + done, len - done);
  		if (ret == -1) {
  			err(1, "%s: write %lld at %lld", name_get(name),
  			    len, pos);
  		}
  		done += ret;
  	}
  
  	tprintf("write %s: %lld at %lld\n", namestr, len, pos);
  }
  
  void
  do_truncate(int fd, unsigned name, off_t len)
  {
  	const char *namestr;
  
  	namestr = name_get(name);
  	if (ftruncate(fd, len) == -1) {
  		err(1, "%s: truncate to %lld", namestr, len);
  	}
  	tprintf("truncate %s: to %lld\n", namestr, len);
  }
  
  void
  do_mkdir(unsigned name)
  {
  	const char *namestr;
  
  	namestr = name_get(name);
  	if (mkdir(namestr, 0775) == -1) {
  		err(1, "%s: mkdir", namestr);
  	}
  	tprintf("mkdir %s\n", namestr);
  }
  
  void
  do_rmdir(unsigned name)
  {
  	const char *namestr;
  
  	namestr = name_get(name);
  	if (rmdir(namestr) == -1) {
  		err(1, "%s: rmdir", namestr);
  	}
  	tprintf("rmdir %s\n", namestr);
  }
  
  void
  do_unlink(unsigned name)
  {
  	const char *namestr;
  
  	namestr = name_get(name);
  	if (remove(namestr) == -1) {
  		err(1, "%s: remove", namestr);
  	}
  	tprintf("remove %s\n", namestr);
  }
  
  void
  do_link(unsigned from, unsigned to)
  {
  	const char *fromstr, *tostr;
  
  	fromstr = name_get(from);
  	tostr = name_get(to);
  	if (link(fromstr, tostr) == -1) {
  		err(1, "link %s to %s", fromstr, tostr);
  	}
  	tprintf("link %s %s\n", fromstr, tostr);
  }
  
  void
  do_rename(unsigned from, unsigned to)
  {
  	const char *fromstr, *tostr;
  
  	fromstr = name_get(from);
  	tostr = name_get(to);
  	if (rename(fromstr, tostr) == -1) {
  		err(1, "rename %s to %s", fromstr, tostr);
  	}
  	tprintf("rename %s %s\n", fromstr, tostr);
  }
  
  void
  do_renamexd(unsigned fromdir, unsigned from, unsigned todir, unsigned to)
  {
  	char frombuf[64];
  	char tobuf[64];
  
  	strcpy(frombuf, name_get(fromdir));
  	strcat(frombuf, "/");
  	strcat(frombuf, name_get(from));
  
  	strcpy(tobuf, name_get(todir));
  	strcat(tobuf, "/");
  	strcat(tobuf, name_get(to));
  
  	if (rename(frombuf, tobuf) == -1) {
  		err(1, "rename %s to %s", frombuf, tobuf);
  	}
  	tprintf("rename %s %s\n", frombuf, tobuf);
  }
  
  void
  do_chdir(unsigned name)
  {
  	const char *namestr;
  
  	namestr = name_get(name);
  	if (chdir(namestr) == -1) {
  		err(1, "chdir: %s", namestr);
  	}
  	tprintf("chdir %s\n", namestr);
  }
  
  void
  do_chdirup(void)
  {
  	if (chdir("..") == -1) {
  		err(1, "chdir: ..");
  	}
  	tprintf("chdir ..\n");
  }
  
  void
  do_sync(void)
  {
  	if (sync()) {
  		warn("sync");
  	}
  	tprintf("sync\n");
  	tprintf("----------------------------------------\n");
  }
  