source: trunk/minix/commands/ash/bltin/echo.c@ 22

/*
 * Echo command.
 *
 * Copyright (C) 1989 by Kenneth Almquist.  All rights reserved.
 * This file is part of ash, which is distributed under the terms specified
 * by the Ash General Public License.  See the file named LICENSE.
 */

#define main echocmd

#include "bltin.h"

#undef eflag


main(argc, argv)  char **argv; {
      register char **ap;
      register char *p;
      register char c;
      int count;
      int nflag = 0;
#ifndef eflag
      int eflag = 0;
#endif

      ap = argv;
      if (argc)
            ap++;
      if ((p = *ap) != NULL) {
            if (equal(p, "--")) {
                  ap++;
            }
            if (equal(p, "-n")) {
                  nflag++;
                  ap++;
            } else if (equal(p, "-e")) {
#ifndef eflag
                  eflag++;
#endif
                  ap++;
            }
      }
      while ((p = *ap++) != NULL) {
            while ((c = *p++) != '\0') {
                  if (c == '\\' && eflag) {
                        switch (*p++) {
                        case 'b':  c = '\b';  break;
                        case 'c':  return 0;            /* exit */
                        case 'f':  c = '\f';  break;
                        case 'n':  c = '\n';  break;
                        case 'r':  c = '\r';  break;
                        case 't':  c = '\t';  break;
                        case 'v':  c = '\v';  break;
                        case '\\':  break;              /* c = '\\' */
                        case '0':
                              c = 0;
                              count = 3;
                              while (--count >= 0 && (unsigned)(*p - '0') < 8)
                                    c = (c << 3) + (*p++ - '0');
                              break;
                        default:
                              p--;
                              break;
                        }
                  }
                  putchar(c);
            }
            if (*ap)
                  putchar(' ');
      }
      if (! nflag)
            putchar('\n');
      return 0;
}