Minix1.5/commands/size.c

/* 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;
}