UNIX — универсальная среда программирования

3.8.56 ttyin1.c

 ttyin /* process response from /dev/tty (version 1) */
 {
  char buf[BUFSIZ];
  FILE *efopen;
  static FILE *tty = NULL;

  if (tty == NULL)
  tty = efopen("/dev/tty", "r");
  if (fgets(buf, BUFSIZ, tty) == NULL || buf[0] == 'q')
  exit(0);
  else /* ordinary line */
  return buf[0];
 }

3.8.57 ttyin2.c

 ttyin /* process response from /dev/tty (version 2) */
 {
  char buf[BUFSIZ];
  FILE *efopen;
  static FILE *tty = NULL;

  if (tty == NULL)
  tty = efopen("/dev/tty", "r");
  for (;;) {
  if (fgets(buf,BUFSIZ,tty) == NULL || buf[0] == 'q')
  exit(0);
  else if (buf[0] == '!') {
  system(buf+1); /* BUG here */
  printf("!\n");
  }
  else /* ordinary line */
  return buf[0];
  }
 }

 #include "system.c"

3.5.58 vis1.c

 /* vis: make funny characters visible (version 1) */
 #include <stdio.h>
 #include <ctype.h>

 main {
  int c;

  while ((c = getchar) != EOF)
  if (isascii(c) &&
  (isprint(c) || c=='\n' || c=='\t' || c==' '))
  putchar(c);
  else
  printf("\\%03o", c);
  exit(0);
 }

3.5.59 vis2.c

 /* vis: make funny characters visible (version 2) */
 #include <stdio.h>
 #include <ctype.h>

 main(argc, argv)
  int argc;
  char *argv[];
 {
int с, strip = 0;

  if (argc > 1 && strcmp(argv[1] , "-s") == 0)
  strip = 1;
  while ((c = getchar) != EOF) if (isascii(c) &&
  (isprint(c) || c=='\n' || c=='\t' || c==' '))
  putchar(c);
  else if (!strip)
  printf("\\%03o", c);
  exit(0);
 }

3.8.60 vis3.c

 /* vis: make funny characters visible (version 3) */
 #include <stdio.h>
 #include <ctype.h>

 int strip = 0; /* 1 => discard special characters */

 main(argc, argv)
  int argc;
  char *argv[];
 {
  int i;
  FILE *fp;

  while (argc > 1 && argv[1][0] == '-') {
  switch (argv[1][1]) {
  case 's': /* -s: strip funny chars */
  strip = 1;
  break;
  default:
  fprintf(stderr, "%s: unknown arg %s\n",
  argv[0], argv[1]);
  exit(1);
  }
  argc--;
  argv++;
  }
  if (argc == 1)
  vis(stdin);
  for (i = 1; i < argc; i++)
  if ((fp=fopen(argv[i], "r")) == NULL) {
  fprintf(stderr, "%s: can't open %s\n",
  argv[0], argv[i]);
  exit(1);
  } else {
  vis(fp);
  fclose(fp);
  }
  exit(0);
 }

 vis(fp) /* make chars visible in FILE *fp */
  FILE *fp;
 {
  int c;

  while ((c = getc(fp)) != EOF)
  if (isascii(c) &&
  (isprint(c) || c=='\n' || c=='\t' || c==' '))
  putchar(c);
  else if (!strip)
printf("\\%03o", с);
 }

3.8.61 waitfile.c

 /* waitfile: wait until file stops changing */
 #include <stdio.h>
 #include <sys/types.h>
 #include <sys/stat.h>

 char *progname;

 main(argc, argv)
  int argc;
  char *argv[];