source: trunk/minix/commands/yap/process.c@ 15

/* Copyright (c) 1985 Ceriel J.H. Jacobs */

# ifndef lint
static char rcsid[] = "$Header: /cvsup/minix/src/commands/yap/process.c,v 1.1.1.1 2005/04/21 14:55:41 beng Exp $";
# endif

# define _PROCESS_

# include "in_all.h"
# if USG_OPEN
# include <fcntl.h>
# endif
# if BSD4_2_OPEN
# include <sys/file.h>
# endif
# if POSIX_OPEN
# include <sys/types.h>
# include <fcntl.h>
# endif
# include <sys/types.h>
# include <sys/stat.h>
# include "process.h"
# include "commands.h"
# include "display.h"
# include "prompt.h"
# include "getline.h"
# include "main.h"
# include "options.h"
# include "output.h"

static int nfiles;              /* Number of filenames on command line */

/*
 * Visit a file, file name is "fn".
 */

VOID
visitfile(fn) char *fn; {
        struct stat statbuf;

        if (stdf > 0) {
                /*
                 * Close old input file
                 */
                (VOID) close(stdf);
        }
        currentfile = fn;
# if USG_OPEN || BSD4_2_OPEN || POSIX_OPEN
        if ((stdf = open(fn,O_RDONLY,0)) < 0) {
# else
        if ((stdf = open(fn,0)) < 0) {
# endif
                error(": could not open");
                maxpos = 0;
        }
        else {  /* Get size for percentage in prompt */
                (VOID) fstat(stdf, &statbuf);
                maxpos = statbuf.st_size;
        }
        do_clean();
        d_clean();
}

/*
 * process the input files, one by one.
 * If there is none, input is from a pipe.
 */

VOID
processfiles(n,argv) char ** argv; {

        static char *dummies[3];
        long arg;

        if (!(nfiles = n)) {
                /*
                 * Input from pipe
                 */
                currentfile = "standard-input";
                /*
                 * Take care that *(filenames - 1) and *(filenames + 1) are 0
                 */
                filenames = &dummies[1];
                d_clean();
                do_clean();
        }
        else {
                filenames = argv;
                (VOID) nextfile(0);
        }
        *--argv = 0;
        if (startcomm) {
                n = getcomm(&arg);
                if (commands[n].c_flags & NEEDS_SCREEN) {
                        redraw(0);
                }
                do_comm(n,arg);
                startcomm = 0;
        }
        redraw(1);
        if (setjmp(SetJmpBuf)) {
                nflush();
                redraw(1);
        }
        DoneSetJmp = 1;
        for (;;) {
                interrupt = 0;
                n = getcomm(&arg);
                do_comm(n, arg);
        }
}

/*
 * Get the next file the user asks for.
 */

int
nextfile(n) {
        register i;

        if ((i = filecount + n) >= nfiles || i < 0) {
                return 1;
        }
        filecount = i;
        visitfile(filenames[i]);
        return 0;
}