/********************************************************************** * Copyright (c) Digital Equipment Corporation 1984, 1985, 1986. * * All Rights Reserved. * * Reference "/usr/src/COPYRIGHT" for applicable restrictions. * **********************************************************************/ static char Sccsid[] = "@(#)rev.c 3.0 4/22/86"; #include <stdio.h> /* reverse lines of a file */ #define N 256 char line[N]; FILE *input; main(argc,argv) char **argv; { register i,c; input = stdin; do { if(argc>1) { if((input=fopen(argv[1],"r"))==NULL) { fprintf(stderr,"rev: cannot open %s\n", argv[1]); exit(1); } } for(;;){ for(i=0;i<N;i++) { line[i] = c = getc(input); switch(c) { case EOF: goto eof; default: continue; case '\n': break; } break; } while(--i>=0) putc(line[i],stdout); putc('\n',stdout); } eof: fclose(input); argc--; argv++; } while(argc>1); }