lib/rpmlead.c

   1 #include "system.h"
   2
   3 #if HAVE_MACHINE_TYPES_H
   4 # include <machine/types.h>
   5 #endif
   6
   7 #include <netinet/in.h>
   8
   9 #include "rpmlib.h"
  10
  11 #include "rpmlead.h"
  12 #include "tread.h"
  13 #include "intl.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     if (write(fd, &l, sizeof(l)) < 0) {
  34         return 1;
  35     }
  36
  37     return 0;
  38 }
  39
  40 int readLead(int fd, struct rpmlead *lead)
  41 {
  42     if (timedRead(fd, lead, sizeof(*lead)) != sizeof(*lead)) {
  43         rpmError(RPMERR_READERROR, _("read failed: %s (%d)"), strerror(errno),
  44               errno);
  45         return 1;
  46     }
  47
  48     lead->type = ntohs(lead->type);
  49     lead->archnum = ntohs(lead->archnum);
  50     lead->osnum = ntohs(lead->osnum);
  51
  52     if (lead->major >= 2)
  53         lead->signature_type = ntohs(lead->signature_type);
  54
  55     return 0;
  56 }
  57