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comparison pcsc-test/pcsc-test1.c @ 84:1d7d8615d628

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pcsc-test: some experiments to get pcsc-lite working
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 23 Jan 2021 17:21:08 +0000
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83:d7a1e7a6d6ba 84:1d7d8615d628
1 #include <sys/types.h>
2 #include <string.h>
3 #include <strings.h>
4 #include <stdio.h>
5 #include <stdlib.h>
6 #include <pcsclite.h>
7 #include <winscard.h>
8
9 main(argc, argv)
10 char **argv;
11 {
12 SCARDCONTEXT hContext;
13 LONG rv;
14 DWORD dwReaders;
15 LPSTR mszReaders;
16 char *cp;
17
18 rv = SCardEstablishContext(SCARD_SCOPE_SYSTEM, NULL, NULL, &hContext);
19 if (rv != SCARD_S_SUCCESS) {
20 fprintf(stderr, "SCardEstablishContext: %s\n",
21 pcsc_stringify_error(rv));
22 exit(1);
23 }
24 rv = SCardListReaders(hContext, NULL, NULL, &dwReaders);
25 if (rv != SCARD_S_SUCCESS) {
26 fprintf(stderr, "SCardListReaders 1st call: %s\n",
27 pcsc_stringify_error(rv));
28 SCardReleaseContext(hContext);
29 exit(1);
30 }
31 printf("dwReaders = %u\n", (unsigned) dwReaders);
32 if (dwReaders < 1) {
33 fprintf(stderr,
34 "error: dwReaders returned by SCardListReaders() is less than 1\n");
35 SCardReleaseContext(hContext);
36 exit(1);
37 }
38 mszReaders = malloc(dwReaders);
39 if (!mszReaders) {
40 perror("malloc for readers list");
41 SCardReleaseContext(hContext);
42 exit(1);
43 }
44 *mszReaders = '\0';
45 rv = SCardListReaders(hContext, NULL, mszReaders, &dwReaders);
46 if (rv != SCARD_S_SUCCESS) {
47 fprintf(stderr, "SCardListReaders 2nd call: %s\n",
48 pcsc_stringify_error(rv));
49 SCardReleaseContext(hContext);
50 exit(1);
51 }
52 for (cp = mszReaders; *cp; ) {
53 printf("Reader: %s\n", cp);
54 cp += strlen(cp) + 1;
55 }
56 printf("End of list of readers\n");
57 SCardReleaseContext(hContext);
58 exit(0);
59 }