lib/rpmlead.c

   1 #include "config.h"
   2 #include "miscfn.h"
   3
   4 #if HAVE_MACHINE_TYPES_H
   5 # include <machine/types.h>
   6 #endif
   7
   8 #include <sys/types.h>
   9 #include <netinet/in.h>
  10 #include <stdlib.h>
  11 #include <stdio.h>
  12 #include <unistd.h>
  13 #include <string.h>
  14 #include <errno.h>
  15
  16 #include "rpmlib.h"
  17 #include "rpmlead.h"
  18 #include "tread.h"
  19 #include "intl.h"
  20
  21 /* The lead needs to be 8 byte aligned */
  22
  23 int writeLead(int fd, struct rpmlead *lead)
  24 {
  25     struct rpmlead l;
  26
  27     memcpy(&l, lead, sizeof(*lead));
  28
  29     l.magic[0] = RPMLEAD_MAGIC0;
  30     l.magic[1] = RPMLEAD_MAGIC1;
  31     l.magic[2] = RPMLEAD_MAGIC2;
  32     l.magic[3] = RPMLEAD_MAGIC3;
  33
  34     l.type = htons(l.type);
  35     l.archnum = htons(l.archnum);
  36     l.osnum = htons(l.osnum);
  37     l.signature_type = htons(l.signature_type);
  38
  39     if (write(fd, &l, sizeof(l)) < 0) {
  40         return 1;
  41     }
  42
  43     return 0;
  44 }
  45
  46 int readLead(int fd, struct rpmlead *lead)
  47 {
  48     if (timedRead(fd, lead, sizeof(*lead)) != sizeof(*lead)) {
  49         rpmError(RPMERR_READERROR, _("read failed: %s (%d)"), strerror(errno),
  50               errno);
  51         return 1;
  52     }
  53
  54     lead->type = ntohs(lead->type);
  55     lead->archnum = ntohs(lead->archnum);
  56     lead->osnum = ntohs(lead->osnum);
  57
  58     if (lead->major >= 2)
  59         lead->signature_type = ntohs(lead->signature_type);
  60
  61     return 0;
  62 }
  63