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Diffstat (limited to 'release/src/router/busybox/echo.c')
-rw-r--r-- | release/src/router/busybox/echo.c | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/release/src/router/busybox/echo.c b/release/src/router/busybox/echo.c new file mode 100644 index 00000000..31c03152 --- /dev/null +++ b/release/src/router/busybox/echo.c @@ -0,0 +1,152 @@ +/* vi: set sw=4 ts=4: */ +/* + * echo implementation for busybox + * + * Copyright (c) 1991, 1993 + * The Regents of the University of California. All rights reserved. + * + * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * Original copyright notice is retained at the end of this file. + */ + +#include <stdio.h> +#include <string.h> +#include <stdlib.h> +#include "busybox.h" + +extern int +echo_main(int argc, char** argv) +{ + int nflag = 0; + int eflag = 0; + + /* Skip argv[0]. */ + argc--; + argv++; + + while (argc > 0 && *argv[0] == '-') + { + register char *temp; + register int ix; + + /* + * If it appears that we are handling options, then make sure + * that all of the options specified are actually valid. + * Otherwise, the string should just be echoed. + */ + temp = argv[0] + 1; + + for (ix = 0; temp[ix]; ix++) + { + if (strrchr("neE", temp[ix]) == 0) + goto just_echo; + } + + if (!*temp) + goto just_echo; + + /* + * All of the options in temp are valid options to echo. + * Handle them. + */ + while (*temp) + { + if (*temp == 'n') + nflag = 1; + else if (*temp == 'e') + eflag = 1; + else if (*temp == 'E') + eflag = 0; + else + goto just_echo; + + temp++; + } + argc--; + argv++; + } + +just_echo: + while (argc > 0) { + const char *arg = argv[0]; + register int c; + + while ((c = *arg++)) { + + /* Check for escape sequence. */ + if (c == '\\' && eflag && *arg) { + if (*arg == 'c') { + /* '\c' means cancel newline. */ + nflag = 1; + arg++; + continue; + } else { + c = process_escape_sequence(&arg); + } + } + + putchar(c); + } + argc--; + argv++; + if (argc > 0) + putchar(' '); + } + if (!nflag) + putchar('\n'); + fflush(stdout); + + return EXIT_SUCCESS; +} + +/*- + * Copyright (c) 1991, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Kenneth Almquist. + * + * 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. <BSD Advertising Clause omitted per the July 22, 1999 licensing change + * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change> + * + * California, Berkeley and its contributors. + * 4. 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. + * + * @(#)echo.c 8.1 (Berkeley) 5/31/93 + */ |