add directory study

study/linux-travel/MINIX-1.5/1.5/Source/commands/shar.c

@@ -0,0 +1,65 @@
+/* shar - make a shell archive		Author: Michiel Husijes */
+
+#include <sys/types.h>
+#include <fcntl.h>
+#include <blocksize.h>
+#include <stdio.h>
+
+#define IO_SIZE		(10 * BLOCK_SIZE)
+
+char input[IO_SIZE];
+char output[IO_SIZE];
+int ind = 0;
+
+main(argc, argv)
+int argc;
+register char *argv[];
+{
+  register int i;
+  int fd;
+
+  for (i = 1; i < argc; i++) {
+	if ((fd = open(argv[i], O_RDONLY)) < 0) {
+		write(2, "Cannot open ", 12);
+		write(2, argv[i], strlen(argv[i]));
+		write(2, ".\n", 2);
+	} else {
+		print("echo x - ");
+		print(argv[i]);
+		print("\nsed '/^X/s///' > ");
+		print(argv[i]);
+		print(" << '/'\n");
+		cat(fd);
+	}
+  }
+  if (ind) write(1, output, ind);
+  exit(0);
+}
+
+cat(fd)
+int fd;
+{
+  static char *current, *last;
+  register int r = 0;
+  register char *cur_pos = current;
+
+  putchar('X');
+  for (;;) {
+	if (cur_pos == last) {
+		if ((r = read(fd, input, IO_SIZE)) <= 0) break;
+		last = &input[r];
+		cur_pos = input;
+	}
+	putchar(*cur_pos);
+	if (*cur_pos++ == '\n' && cur_pos != last) putchar('X');
+  }
+  print("/\n");
+  (void) close(fd);
+  current = cur_pos;
+}
+
+print(str)
+register char *str;
+{
+  while (*str) putchar(*str++);
+}