BSD 4_1c_2 release

[unix-history] / usr / src / ucb / num.c

static char *sccsid = "@(#)num.c        4.2 (Berkeley) 10/13/82";
#include        <stdio.h>
#define         formfeed 0xc

/*
* number - a cat like program which prints a file with line
*          numbers. Printing of numbers is suppressed on blank
*          lines.
*
* Original Version by William Joy, June 1977
* Updated October 1979 by M. Kirk McKusick
*/
main(ac, av)
       int ac;
       char *av[];
       {
       register int argc = ac;
       register char **argv = av;
       register int lino;
       register char *lineptr;
       register FILE *STDOUT = stdout;
       register FILE *STDIN = stdin;
       char line[512];
       extern char _sibuf[], _sobuf[];

       argv++;
       argc--;
       lino = 1;
       setbuf(STDIN,_sibuf);
       setbuf(STDOUT,_sobuf);
       do
               {
               if (argc)
                       if (freopen(*argv++, "r", STDIN) == NULL)
                               {
                               perror(*--argv);
                               exit(1);
                               }
               for(;;)
                       {
                       lineptr = line;
                       *lineptr = 0;
                       fscanf(STDIN,"%[^\n]",lineptr);
                       if (feof(STDIN))
                               break;
                       if (*lineptr == formfeed)
                               putc(*lineptr++,STDOUT);
                       if (!*lineptr)
                               putc('\n',STDOUT);
                       else
                               fprintf(STDOUT,"%6d  %s\n",lino,lineptr);
                       lino++;
                       getc(STDIN);
                       }
               }
               while (--argc > 0);
       exit();
       }