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 /* The lead needs to be 8 byte aligned */
  19
  20 int writeLead(FD_t fd, const struct rpmlead *lead)
  21 {
  22     struct rpmlead l;
  23
  24     memcpy(&l, lead, sizeof(*lead));
  25
  26     l.magic[0] = RPMLEAD_MAGIC0;
  27     l.magic[1] = RPMLEAD_MAGIC1;
  28     l.magic[2] = RPMLEAD_MAGIC2;
  29     l.magic[3] = RPMLEAD_MAGIC3;
  30
  31     l.type = htons(l.type);
  32     l.archnum = htons(l.archnum);
  33     l.osnum = htons(l.osnum);
  34     l.signature_type = htons(l.signature_type);
  35
  36     if (Fwrite(&l, sizeof(char), sizeof(l), fd) != sizeof(l)) {
  37         return 1;
  38     }
  39
  40     return 0;
  41 }
  42
  43 int readLead(FD_t fd, struct rpmlead *lead)
  44 {
  45     memset(lead, 0, sizeof(*lead));
  46     if (timedRead(fd, (char *)lead, sizeof(*lead)) != sizeof(*lead)) {
  47         rpmError(RPMERR_READ, _("read failed: %s (%d)\n"), Fstrerror(fd),
  48               errno);
  49         return 1;
  50     }
  51
  52     lead->type = ntohs(lead->type);
  53     lead->archnum = ntohs(lead->archnum);
  54     lead->osnum = ntohs(lead->osnum);
  55
  56     if (lead->major >= 2)
  57         lead->signature_type = ntohs(lead->signature_type);
  58
  59     return 0;
  60 }