/* * ascii-xfr	Ascii file transfer. * * Usage:	ascii-xfr -s|-r [-dnv] [-c character delay] [-l line delay] * * Version:	@(#)ascii-xfr  1.00  18-Feb-1996  MvS. * * */#include <stdio.h>#include <stdlib.h>#include <unistd.h>#include <string.h>#include <time.h>/* *	Externals. */extern int getopt();extern int optind;extern char *optarg;/* *	Global variables. */char *Version = "@(#)ascii-xfr  1.00  18-Feb-1996  MvS";int cdelay = 0;int ldelay = 0;int dotrans = 1;int eofchar = 26;int verbose = 0;time_t start;time_t last;unsigned long bdone = 0;/* *	Millisecond delay. */void ms_delay(ms)int ms;{#if defined(__linux__) || defined(BSD)  usleep(1000 * ms);#endif}/* *	Output a line and delay if needed. */void lineout(line)char *line;{  while(*line) {	putchar(*line++);	if (cdelay) {		fflush(stdout);		ms_delay(cdelay);	}  }}/* *	Show the up/download statistics. */void stats(force)int force;{  time_t now;  time_t dif;  if (!verbose) return;  time(&now);  dif = now - last;  if (!force && dif < 2) return;  if (dif < 1) dif = 1;  last = now;  fprintf(stderr, "\r%.1f Kbytes transferred at %d CPS",	(float)bdone / 1024, (int)(bdone / dif));  fflush(stderr);}/* *	Send a file in ASCII mode. */int asend(file)char *file;{  FILE *fp;  char line[1024];  char *s;  int first = 1;  if ((fp = fopen(file, "r")) == NULL) {	perror(file);	return -1;  }  while(fgets(line, 1024, fp) != NULL) {	if (dotrans && (s = strrchr(line, '\n')) != NULL) {		if (s > line && *(s - 1) == '\r')			s--;		*s = 0;		lineout(line);		lineout("\r\n");		bdone += strlen(line) + 2;	} else {		lineout(line);		bdone += strlen(line);	}	if (ldelay) {		fflush(stdout);		ms_delay(ldelay);	}	stats(first);	first = 0;  }  putchar(eofchar);  fflush(stdout);  fclose(fp);  return 0;}/* *	Receive a file in ASCII mode. */int arecv(file)char *file;{  FILE *fp;  char line[1024];  char *s;  int n;  int first = 1;  if ((fp = fopen(file, "w")) == NULL) {	perror(file);	return -1;  }  while((n = read(0, line, 1024)) > 0) {	for(s = line; n-- >0; s++) {		if (*s == eofchar) break;		if (dotrans && *s == '\r') continue;		bdone++;		fputc(*s, fp);	}	stats(first);	first = 0;	if (*s == eofchar) break;  }  fclose(fp);  return 0;}void usage(){  fprintf(stderr, "\Usage: ascii-xfr -s|-r [-dvn] [-l linedelay] [-c character delay] filename\n\       -s:  send\n\       -r:  receive\n\       -d:  set End Of File character to Control-D (instead of Control-Z)\n\       -v:  verbose (statistics on stderr output)\n\       -n:  do not translate CRLF <--> LF\n\       Delays are in milliseconds.\n");  exit(1);}int main(argc, argv)int argc;char **argv;{  int c;  int what = 0;  char *file;  int ret;  while((c = getopt(argc, argv, "srdvnl:c:")) != EOF) {	switch(c) {		case 's':		case 'r':			what = c;			break;		case 'd':			eofchar = 4; /* Unix, CTRL-D */			break;		case 'v':			verbose++;			break;		case 'n':			dotrans = 0;			break;		case 'l':			ldelay = atoi(optarg);			break;		case 'c':			cdelay = atoi(optarg);			break;		default:			usage();			break;	}  }  if (optind != argc - 1 || what == 0) usage();  file = argv[optind];  time(&start);  last = start;  if (what == 's') {	fprintf(stderr, "ASCII upload of \"%s\"\n", file);	if (cdelay || ldelay)		fprintf(stderr, "Line delay: %d ms, character delay %d ms\n",			ldelay, cdelay);	fprintf(stderr, "\n");	fflush(stderr);	ret = asend(file);  } else {	fprintf(stderr, "ASCII download of \"%s\"\n\n", file);	fflush(stderr);	ret = arecv(file);  }  if (verbose) {	stats(1);	fprintf(stderr, "... Done.\n");	fflush(stdout);  }  return (ret < 0 ? 1 : 0);}