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
  20 /* The lead needs to be 8 byte aligned */
  21
  22 int writeLead(int 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 (write(fd, &l, sizeof(l)) < 0) {
  39         return 1;
  40     }
  41
  42     return 0;
  43 }
  44
  45 int readLead(int fd, struct rpmlead *lead)
  46 {
  47     if (timedRead(fd, lead, sizeof(*lead)) != sizeof(*lead)) {
  48         rpmError(RPMERR_READERROR, _("read failed: %s (%d)"), strerror(errno),
  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 }
  62