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Put echo on a diet, removing unnecessary use of stdio and getopt.

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Before...
-r-xr-xr-x  1 root  wheel  58636 Oct 28 05:16 /bin/echo
After...
-rwxr-xr-x  1 root  wheel  12824 Nov 12 17:39 /usr/obj/usr/src/bin/echo/echo

Submitted by:	Tim Kientzle <kientzle@acm.org>
This commit is contained in:
Nate Lawson 2002-11-13 01:39:02 +00:00
parent 0ac1a67828
commit ef3e71dac3
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=106835
1 changed files with 8 additions and 9 deletions
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17
bin/echo/echo.c
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@ -45,8 +45,7 @@ static char sccsid[] = "@(#)echo.c 8.1 (Berkeley) 5/31/93";
#include <sys/cdefs.h> #include <sys/cdefs.h>
__FBSDID("$FreeBSD$"); __FBSDID("$FreeBSD$");
#include <stdio.h> #include <unistd.h>
#include <stdlib.h>
#include <string.h> #include <string.h>
/* ARGSUSED */ /* ARGSUSED */
@ -64,6 +63,9 @@ main(int argc __unused, char *argv[])
nflag = 0; nflag = 0;
while (argv[0] != NULL) { while (argv[0] != NULL) {
size_t len;
len = strlen(argv[0]);
/* /*
* If the next argument is NULL then this is this * If the next argument is NULL then this is this
@ -71,23 +73,20 @@ main(int argc __unused, char *argv[])
* for a trailing \c. * for a trailing \c.
*/ */
if (argv[1] == NULL) { if (argv[1] == NULL) {
size_t len;
len = strlen(argv[0]);
/* is there room for a '\c' and is there one? */ /* is there room for a '\c' and is there one? */
if (len >= 2 && if (len >= 2 &&
argv[0][len - 2] == '\\' && argv[0][len - 2] == '\\' &&
argv[0][len - 1] == 'c') { argv[0][len - 1] == 'c') {
/* chop it and set the no-newline flag. */ /* chop it and set the no-newline flag. */
argv[0][len - 2] = '\0'; len -= 2;
nflag = 1; nflag = 1;
} }
} }
(void)printf("%s", argv[0]); write(STDOUT_FILENO, argv[0], len);
if (*++argv) if (*++argv)
putchar(' '); write(STDOUT_FILENO, " ", 1);
} }
if (!nflag) if (!nflag)
putchar('\n'); write(STDOUT_FILENO, "\n", 1);
return 0; return 0;
} }