From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <599f06db0803261917v4fc6377eu78b5f8053210a9c1@mail.gmail.com>
Date: Thu, 27 Mar 2008 03:17:58 +0100
From: "Gorka Guardiola" <paurea@gmail.com>
To: "Fans of the OS Plan 9 from Bell Labs" <9fans@9fans.net>
In-Reply-To: <599f06db0803261857u76633432r252c794d65ba57b6@mail.gmail.com>
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References: <2dccf442569c12a4ba9193abb0392726@quanstro.net>
	<F5B1C672-6402-4073-8E19-3D5539ACB95A@mac.com>
	<8ccc8ba40803261243g74636b35k6f5f120e4a66be1c@mail.gmail.com>
	<599f06db0803261857u76633432r252c794d65ba57b6@mail.gmail.com>
Subject: Re: [9fans] bug in echo?
Topicbox-Message-UUID: 8319945c-ead3-11e9-9d60-3106f5b1d025

Equivalently (tried but not much, cleaner).

#include <u.h>
#include <libc.h>

void
main(int argc, char *argv[])
{
       int nflag, argi;
       int i, len;
       char *buf, *p;

       nflag = 0;
       argi = 0;
       for(i = 1; i < argc; i++){
                if(argv[i][0] != '-' )
                       break;
                if (strcmp(argv[i], "--") == 0){
                        argi++;
                        break;
                 }
                 if(strcmp(argv[i], "-n") == 0){
                        argi++;
                        nflag++;
                  }
         }


       len = 1;
       for(i = 1+argi; i < argc; i++)
               len += strlen(argv[i])+1;

       buf = malloc(len);
       if(buf == 0)
               exits("no memory");

       p = buf;
       for(i = 1+argi; i < argc; i++){
               strcpy(p, argv[i]);
               p += strlen(p);
               if(i < argc-1)
                       *p++ = ' ';
       }

       if(!nflag)
               *p++ = '\n';

       if(write(1, buf, p-buf) < 0)
               fprint(2, "echo: write error: %r\n");

       exits((char *)0);
}


--
- curiosity sKilled the cat