lib/rpmlead.c

   1 #ifdef HAVE_MACHINE_TYPES_H
   2 # include <machine/types.h>
   3 #endif
   4
   5 #include <netinet/in.h>
   6 #include <stdlib.h>
   7 #include <stdio.h>
   8 #include <unistd.h>
   9 #include <string.h>
  10 #include <errno.h>
  11
  12 #include "rpmerr.h"
  13 #include "rpmlead.h"
  14
  15 /* The lead needs to be 8 byte aligned */
  16
  17 int writeLead(int fd, struct rpmlead *lead)
  18 {
  19     struct rpmlead l;
  20
  21     memcpy(&l, lead, sizeof(*lead));
  22
  23     l.magic[0] = RPMLEAD_MAGIC0;
  24     l.magic[1] = RPMLEAD_MAGIC1;
  25     l.magic[2] = RPMLEAD_MAGIC2;
  26     l.magic[3] = RPMLEAD_MAGIC3;
  27
  28     l.type = htons(l.type);
  29     l.archnum = htons(l.archnum);
  30     l.osnum = htons(l.osnum);
  31     l.signature_type = htons(l.signature_type);
  32
  33     write(fd, &l, sizeof(l));
  34
  35     return 0;
  36 }
  37
  38 int readLead(int fd, struct rpmlead *lead)
  39 {
  40     if (read(fd, lead, sizeof(*lead)) != sizeof(*lead)) {
  41         error(RPMERR_READERROR, "read failed: %s (%d)", strerror(errno),
  42               errno);
  43         return 1;
  44     }
  45
  46     lead->type = ntohs(lead->type);
  47     lead->archnum = ntohs(lead->archnum);
  48     lead->osnum = ntohs(lead->osnum);
  49
  50     if (lead->major >= 2)
  51         lead->signature_type = ntohs(lead->signature_type);
  52
  53     return 0;
  54 }
  55