add directory study

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

@@ -0,0 +1,71 @@
+/* size - tell size of an object file		Author: Andy Tanenbaum */
+
+#include <sys/types.h>
+#include <fcntl.h>
+
+#define HLONG            8	/* # longs in the header */
+#define TEXT             2
+#define DATA             3
+#define BSS              4
+#define CHMEM            6
+#define MAGIC       0x0301	/* magic number for an object file */
+#define SEPBIT  0x00200000	/* this bit is set for separate I/D */
+
+int heading;			/* set when heading printed */
+int error;
+
+main(argc, argv)
+int argc;
+char *argv[];
+{
+  int i;
+
+  if (argc == 1) {
+	size("a.out");
+	exit(error);
+  }
+  for (i = 1; i < argc; i++) size(argv[i]);
+  exit(error);
+}
+
+
+
+size(name)
+char *name;
+{
+  int fd, separate;
+  long head[HLONG], dynam, allmem;
+
+  if ((fd = open(name, O_RDONLY)) < 0) {
+	stderr3("size: can't open ", name, "\n");
+	return;
+  }
+  if (read(fd, head, sizeof(head)) != sizeof(head)) {
+	stderr3("size: ", name, ": header too short\n");
+	error = 1;
+	close(fd);
+	return;
+  }
+  if ((head[0] & 0xFFFFL) != MAGIC) {
+	stderr3("size: ", name, " not an object file\n");
+	close(fd);
+	return;
+  }
+  separate = (head[0] & SEPBIT ? 1 : 0);
+  dynam = head[CHMEM] - head[TEXT] - head[DATA] - head[BSS];
+  if (separate) dynam += head[TEXT];
+  allmem = (separate ? head[CHMEM] + head[TEXT] : head[CHMEM]);
+  if (heading++ == 0) prints("  text\t  data\t   bss\t stack\tmemory\n");
+  printf("%6ld\t%6ld\t%6ld\t%6ld\t%6ld\t%s\n",
+         head[TEXT], head[DATA], head[BSS], dynam, allmem, name);
+  close(fd);
+}
+
+stderr3(s1, s2, s3)
+char *s1, *s2, *s3;
+{
+  std_err(s1);
+  std_err(s2);
+  std_err(s3);
+  error = 1;
+}