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 #include "tread.h"
  15
  16 /* The lead needs to be 8 byte aligned */
  17
  18 int writeLead(int fd, struct rpmlead *lead)
  19 {
  20     struct rpmlead l;
  21
  22     memcpy(&l, lead, sizeof(*lead));
  23
  24     l.magic[0] = RPMLEAD_MAGIC0;
  25     l.magic[1] = RPMLEAD_MAGIC1;
  26     l.magic[2] = RPMLEAD_MAGIC2;
  27     l.magic[3] = RPMLEAD_MAGIC3;
  28
  29     l.type = htons(l.type);
  30     l.archnum = htons(l.archnum);
  31     l.osnum = htons(l.osnum);
  32     l.signature_type = htons(l.signature_type);
  33
  34     write(fd, &l, sizeof(l));
  35
  36     return 0;
  37 }
  38
  39 int readLead(int fd, struct rpmlead *lead)
  40 {
  41     if (timedRead(fd, lead, sizeof(*lead)) != sizeof(*lead)) {
  42         error(RPMERR_READERROR, "read failed: %s (%d)", strerror(errno),
  43               errno);
  44         return 1;
  45     }
  46
  47     lead->type = ntohs(lead->type);
  48     lead->archnum = ntohs(lead->archnum);
  49     lead->osnum = ntohs(lead->osnum);
  50
  51     if (lead->major >= 2)
  52         lead->signature_type = ntohs(lead->signature_type);
  53
  54     return 0;
  55 }
  56