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 #if !defined(__LCLINT__)
  12 #include <netinet/in.h>
  13 #endif  /* __LCLINT__ */
  14
  15 #include <rpmlib.h>
  16
  17 #include "rpmlead.h"
  18 #include "debug.h"
  19
  20 /* The lead needs to be 8 byte aligned */
  21
  22 int writeLead(FD_t fd, struct rpmlead *lead)
  23 {
  24     struct rpmlead l;
  25
  26     memcpy(&l, lead, sizeof(*lead));
  27
  28     l.magic[0] = RPMLEAD_MAGIC0;
  29     l.magic[1] = RPMLEAD_MAGIC1;
  30     l.magic[2] = RPMLEAD_MAGIC2;
  31     l.magic[3] = RPMLEAD_MAGIC3;
  32
  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     if (Fwrite(&l, sizeof(char), sizeof(l), fd) < 0) {
  39         return 1;
  40     }
  41
  42     return 0;
  43 }
  44
  45 int readLead(FD_t fd, struct rpmlead *lead)
  46 {
  47     if (timedRead(fd, (char *)lead, sizeof(*lead)) != sizeof(*lead)) {
  48         rpmError(RPMERR_READ, _("read failed: %s (%d)"), Fstrerror(fd),
  49               errno);
  50         return 1;
  51     }
  52
  53     lead->type = ntohs(lead->type);
  54     lead->archnum = ntohs(lead->archnum);
  55     lead->osnum = ntohs(lead->osnum);
  56
  57     if (lead->major >= 2)
  58         lead->signature_type = ntohs(lead->signature_type);
  59
  60     return 0;
  61 }