rpm  5.2.1
rpm2cpio.c
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1 /* rpmarchive: spit out the main archive portion of a package */
2 
3 #include "system.h"
4 const char *__progname;
5 
6 #include <rpmio.h>
7 #include <rpmiotypes.h> /* XXX fnpyKey */
8 #include <rpmurl.h>
9 #include <rpmtypes.h>
10 #include <rpmtag.h>
11 #include <pkgio.h>
12 
13 #include <rpmts.h>
14 
15 #include "debug.h"
16 
17 int main(int argc, char **argv)
18 {
19  FD_t fdi, fdo;
20  Header h;
21  char * rpmio_flags;
22  rpmRC rc;
23  FD_t gzdi;
24 
25  setprogname(argv[0]); /* Retrofit glibc __progname */
26  if (argc == 1 || (argc == 2 && !strcmp(argv[1], "-")))
27  fdi = fdDup(STDIN_FILENO);
28  else {
29  int ut = urlPath(argv[1], NULL);
30  if (ut == URL_IS_HTTP || ut == URL_IS_HTTPS) {
31  fprintf(stderr, "%s: %s: HTTP/HTTPS transport is non-functional.\n",
32  argv[0], argv[1]);
33  exit(EXIT_FAILURE);
34  }
35  fdi = Fopen(argv[1], "r");
36  }
37 
38  if (Ferror(fdi)) {
39  fprintf(stderr, "%s: %s: %s\n", argv[0],
40  (argc == 1 ? "<stdin>" : argv[1]), Fstrerror(fdi));
41  exit(EXIT_FAILURE);
42  }
43  fdo = fdDup(STDOUT_FILENO);
44 
45  { rpmts ts = rpmtsCreate();
46  rpmVSFlags vsflags = 0;
47 
48  /* XXX retain the ageless behavior of rpm2cpio */
49  vsflags |= _RPMVSF_NODIGESTS;
50  vsflags |= _RPMVSF_NOSIGNATURES;
51  vsflags |= RPMVSF_NOHDRCHK;
52  (void) rpmtsSetVSFlags(ts, vsflags);
53 
54  /*@-mustmod@*/ /* LCL: segfault */
55  rc = rpmReadPackageFile(ts, fdi, "rpm2cpio", &h);
56  /*@=mustmod@*/
57 
58  (void)rpmtsFree(ts);
59  ts = NULL;
60  }
61 
62  switch (rc) {
63  case RPMRC_OK:
64  case RPMRC_NOKEY:
65  case RPMRC_NOTTRUSTED:
66  break;
67  case RPMRC_NOTFOUND:
68  fprintf(stderr, _("argument is not an RPM package\n"));
69  exit(EXIT_FAILURE);
70  break;
71  case RPMRC_FAIL:
72  default:
73  fprintf(stderr, _("error reading header from package\n"));
74  exit(EXIT_FAILURE);
75  break;
76  }
77 
78  /* Retrieve type of payload compression. */
79  { HE_t he = memset(alloca(sizeof(*he)), 0, sizeof(*he));
80  const char * payload_compressor = NULL;
81  char * t;
82  int xx;
83 
85  xx = headerGet(h, he, 0);
86  payload_compressor = (xx ? he->p.str : "gzip");
87 
88  rpmio_flags = t = alloca(sizeof("r.gzdio"));
89  *t++ = 'r';
90  if (!strcmp(payload_compressor, "gzip"))
91  t = stpcpy(t, ".gzdio");
92  if (!strcmp(payload_compressor, "bzip2"))
93  t = stpcpy(t, ".bzdio");
94  if (!strcmp(payload_compressor, "lzma"))
95  t = stpcpy(t, ".lzdio");
96  if (!strcmp(payload_compressor, "xz"))
97  t = stpcpy(t, ".xzdio");
98  he->p.ptr = _free(he->p.ptr);
99  }
100 
101  gzdi = Fdopen(fdi, rpmio_flags); /* XXX gzdi == fdi */
102  if (gzdi == NULL) {
103  fprintf(stderr, _("cannot re-open payload: %s\n"), Fstrerror(gzdi));
104  exit(EXIT_FAILURE);
105  }
106 
107  rc = ufdCopy(gzdi, fdo);
108  rc = (rc <= 0) ? EXIT_FAILURE : EXIT_SUCCESS;
109  Fclose(fdo);
110 
111  Fclose(gzdi); /* XXX gzdi == fdi */
112 
113  return rc;
114 }