lib/rpmlead.c

   1 #ifdef HAVE_MACHINE_TYPES_H
   2 # include <machine/types.h>
   3 #endif
   4
   5 #include <sys/types.h>
   6 #include <netinet/in.h>
   7 #include <stdlib.h>
   8 #include <stdio.h>
   9 #include <unistd.h>
  10 #include <string.h>
  11 #include <errno.h>
  12
  13 #include "rpmlib.h"
  14 #include "rpmlead.h"
  15 #include "tread.h"
  16
  17 /* The lead needs to be 8 byte aligned */
  18
  19 int writeLead(int fd, struct rpmlead *lead)
  20 {
  21     struct rpmlead l;
  22
  23     memcpy(&l, lead, sizeof(*lead));
  24
  25     l.magic[0] = RPMLEAD_MAGIC0;
  26     l.magic[1] = RPMLEAD_MAGIC1;
  27     l.magic[2] = RPMLEAD_MAGIC2;
  28     l.magic[3] = RPMLEAD_MAGIC3;
  29
  30     l.type = htons(l.type);
  31     l.archnum = htons(l.archnum);
  32     l.osnum = htons(l.osnum);
  33     l.signature_type = htons(l.signature_type);
  34
  35     if (write(fd, &l, sizeof(l)) < 0) {
  36         return 1;
  37     }
  38
  39     return 0;
  40 }
  41
  42 int readLead(int fd, struct rpmlead *lead)
  43 {
  44     if (timedRead(fd, lead, sizeof(*lead)) != sizeof(*lead)) {
  45         rpmError(RPMERR_READERROR, "read failed: %s (%d)", strerror(errno),
  46               errno);
  47         return 1;
  48     }
  49
  50     lead->type = ntohs(lead->type);
  51     lead->archnum = ntohs(lead->archnum);
  52     lead->osnum = ntohs(lead->osnum);
  53
  54     if (lead->major >= 2)
  55         lead->signature_type = ntohs(lead->signature_type);
  56
  57     return 0;
  58 }
  59