lib/rpmlead.c

   1 /** \ingroup lead
   2  * \file lib/rpmlead.c
   3  */
   4
   5 #include "system.h"
   6
   7 #if HAVE_MACHINE_TYPES_H
   8 # include <machine/types.h>
   9 #endif
  10
  11 #include <netinet/in.h>
  12
  13 #include <rpmlib.h>
  14
  15 #include "rpmlead.h"
  16 #include "debug.h"
  17
  18 static unsigned char lead_magic[] = {
  19     RPMLEAD_MAGIC0, RPMLEAD_MAGIC1, RPMLEAD_MAGIC2, RPMLEAD_MAGIC3
  20 };
  21
  22 /* The lead needs to be 8 byte aligned */
  23
  24 int writeLead(FD_t fd, const struct rpmlead *lead)
  25 {
  26     struct rpmlead l;
  27
  28 /*@-boundswrite@*/
  29     memcpy(&l, lead, sizeof(*lead));
  30 /*@=boundswrite@*/
  31
  32     memcpy(&l.magic, lead_magic, sizeof(lead_magic));
  33     l.type = htons(l.type);
  34     l.archnum = htons(l.archnum);
  35     l.osnum = htons(l.osnum);
  36     l.signature_type = htons(l.signature_type);
  37
  38 /*@-boundswrite@*/
  39     if (Fwrite(&l, 1, sizeof(l), fd) != sizeof(l))
  40         return 1;
  41 /*@=boundswrite@*/
  42
  43     return 0;
  44 }
  45
  46 int readLead(FD_t fd, struct rpmlead *lead)
  47 {
  48 /*@-boundswrite@*/
  49     memset(lead, 0, sizeof(*lead));
  50 /*@=boundswrite@*/
  51     /*@-type@*/ /* FIX: remove timed read */
  52     if (timedRead(fd, (char *)lead, sizeof(*lead)) != sizeof(*lead)) {
  53         rpmError(RPMERR_READ, _("read failed: %s (%d)\n"), Fstrerror(fd),
  54               errno);
  55         return 1;
  56     }
  57     /*@=type@*/
  58
  59     if (memcmp(lead->magic, lead_magic, sizeof(lead_magic)))
  60         return 1;
  61
  62     lead->type = ntohs(lead->type);
  63     lead->archnum = ntohs(lead->archnum);
  64     lead->osnum = ntohs(lead->osnum);
  65
  66     if (lead->major >= 2)
  67         lead->signature_type = ntohs(lead->signature_type);
  68
  69     return 0;
  70 }