strmode.c

/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 1990, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * 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 REGENTS 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 REGENTS 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 <string.h>

void strmode(/* mode_t */ int mode, char *p) {
  /* print type */
  switch (mode & S_IFMT) {
  case S_IFDIR: /* directory */
    *p++ = 'd';
    break;
  case S_IFCHR: /* character special */
    *p++ = 'c';
    break;
  case S_IFBLK: /* block special */
    *p++ = 'b';
    break;
  case S_IFREG: /* regular */
    *p++ = '-';
    break;
  case S_IFLNK: /* symbolic link */
    *p++ = 'l';
    break;
  case S_IFSOCK: /* socket */
    *p++ = 's';
    break;
#ifdef S_IFWHT
  case S_IFWHT: /* whiteout */
    *p++ = 'w';
    break;
#endif
  default: /* unknown */
    *p++ = '?';
    break;
  }
  /* usr */
  if (mode & S_IRUSR)
    *p++ = 'r';
  else
    *p++ = '-';
  if (mode & S_IWUSR)
    *p++ = 'w';
  else
    *p++ = '-';
  switch (mode & (S_IXUSR | S_ISUID)) {
  case 0:
    *p++ = '-';
    break;
  case S_IXUSR:
    *p++ = 'x';
    break;
  case S_ISUID:
    *p++ = 'S';
    break;
  case S_IXUSR | S_ISUID:
    *p++ = 's';
    break;
  }
  /* group */
  if (mode & S_IRGRP)
    *p++ = 'r';
  else
    *p++ = '-';
  if (mode & S_IWGRP)
    *p++ = 'w';
  else
    *p++ = '-';
  switch (mode & (S_IXGRP | S_ISGID)) {
  case 0:
    *p++ = '-';
    break;
  case S_IXGRP:
    *p++ = 'x';
    break;
  case S_ISGID:
    *p++ = 'S';
    break;
  case S_IXGRP | S_ISGID:
    *p++ = 's';
    break;
  }
  /* other */
  if (mode & S_IROTH)
    *p++ = 'r';
  else
    *p++ = '-';
  if (mode & S_IWOTH)
    *p++ = 'w';
  else
    *p++ = '-';
  switch (mode & (S_IXOTH | S_ISVTX)) {
  case 0:
    *p++ = '-';
    break;
  case S_IXOTH:
    *p++ = 'x';
    break;
  case S_ISVTX:
    *p++ = 'T';
    break;
  case S_IXOTH | S_ISVTX:
    *p++ = 't';
    break;
  }
  *p++ = ' ';
  *p = '\0';
}