111 lines
2.0 KiB
C
111 lines
2.0 KiB
C
/* Copyright (c) 1990 UNIX System Laboratories, Inc. */
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/* Copyright (c) 1984, 1986, 1987, 1988, 1989, 1990 AT&T */
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/* All Rights Reserved */
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/* THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF */
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/* UNIX System Laboratories, Inc. */
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/* The copyright notice above does not evidence any */
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/* actual or intended publication of such source code. */
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#ident "@(#)echo:echo.c 1.3.1.1"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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main(argc, argv)
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int argc;
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char **argv;
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{
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register char *cp;
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register int i, wd;
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int j;
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int fnewline = 1;
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char *xpg; /* "on": use xpg standard for -n optin */
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if(--argc == 0) {
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putchar('\n');
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goto done;
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} else if (!strcmp(argv[1], "-n")) {
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if( (xpg = getenv("_XPG")) != NULL && atoi(xpg) > 0) {
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fputs("-n ", stdout);
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}
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else{
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fnewline = 0;
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}
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++argv;
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--argc;
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}
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for(i = 1; i <= argc; i++) {
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for(cp = argv[i]; *cp; cp++) {
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if(*cp == '\\')
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switch(*++cp) {
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case 'b':
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putchar('\b');
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continue;
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case 'c':
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#ifdef sgi
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fnewline = 0;
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continue;
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#else
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exit(0);
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#endif
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case 'f':
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putchar('\f');
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continue;
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case 'n':
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putchar('\n');
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continue;
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case 'r':
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putchar('\r');
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continue;
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case 't':
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putchar('\t');
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continue;
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case 'v':
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putchar('\v');
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continue;
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case '\\':
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putchar('\\');
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continue;
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case '0':
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j = wd = 0;
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while ((*++cp >= '0' && *cp <= '7') && j++ < 3) {
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wd <<= 3;
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wd |= (*cp - '0');
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}
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putchar(wd);
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--cp;
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continue;
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default:
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cp--;
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}
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putchar(*cp);
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}
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#ifdef sgi
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if (i == argc) {
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if (fnewline)
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putchar ('\n');
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} else {
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putchar(' ');
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}
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#else
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putchar(((i == argc) && fnewline)? '\n': ' ');
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#endif
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}
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done:
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/* done so we can report errors over nfsv2, and writes to a file on
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* a full filesystem. */
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if(fclose(stdout) == EOF)
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fprintf(stderr, "echo: %s\n", strerror(errno));
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exit(0);
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}
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