echo
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/* echo - echo argumentsAuthor: Andy Tanenbaum */#define SIZE 2048char buf[SIZE];int count;main(argc, argv)int argc;char *argv[];{ register int i, nflag; nflag = 0; if(argc > 1 && argv[1][0] == '-' && argv[1][1] == 'n') {nflag++;argc--;argv++; } for(i = 1; i < argc; i++) {collect(argv[i]);if (i < argc - 1) collect(" "); } if (nflag == 0) collect("\n"); /* Print accumulated output. */ if (count > 0) write(1, buf, count); exit(0);}collect(s)char *s;{/* Collect characters. For efficiency, write them in large chunks. */ char c; if (count == SIZE) {write(1, buf, count); count = 0;} while ( (c = *s++) != 0) {if (count < SIZE && c != '"') buf[count++] = c; }}
