aboutsummaryrefslogtreecommitdiff
path: root/src/tool_help.c
blob: cb0afef56615a8744f871570253724c25032b9c2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
/***************************************************************************
 *                                  _   _ ____  _
 *  Project                     ___| | | |  _ \| |
 *                             / __| | | | |_) | |
 *                            | (__| |_| |  _ <| |___
 *                             \___|\___/|_| \_\_____|
 *
 * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
 *
 * This software is licensed as described in the file COPYING, which
 * you should have received as part of this distribution. The terms
 * are also available at https://curl.haxx.se/docs/copyright.html.
 *
 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
 * copies of the Software, and permit persons to whom the Software is
 * furnished to do so, under the terms of the COPYING file.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ***************************************************************************/
#include "tool_setup.h"
#ifdef HAVE_STRCASECMP
#include <strings.h>
#endif

#include "tool_panykey.h"
#include "tool_help.h"
#include "tool_libinfo.h"
#include "tool_version.h"

#include "memdebug.h" /* keep this as LAST include */

#ifdef MSDOS
#  define USE_WATT32
#endif

/*
 * The help output is generated with the following command
 ---------------------------------------------------------

  cd $srcroot/docs/cmdline-opts
  ./gen.pl listhelp
 */

struct helptxt {
  const char *opt;
  const char *desc;
};

static const struct helptxt helptext[] = {
  {"    --abstract-unix-socket <path>",
   "Connect via abstract Unix domain socket"},
  {"    --alt-svc <file name>",
   "Enable alt-svc with this cache file"},
  {"    --anyauth",
   "Pick any authentication method"},
  {"-a, --append",
   "Append to target file when uploading"},
  {"    --basic",
   "Use HTTP Basic Authentication"},
  {"    --cacert <file>",
   "CA certificate to verify peer against"},
  {"    --capath <dir>",
   "CA directory to verify peer against"},
  {"-E, --cert <certificate[:password]>",
   "Client certificate file and password"},
  {"    --cert-status",
   "Verify the status of the server certificate"},
  {"    --cert-type <type>",
   "Certificate file type (DER/PEM/ENG)"},
  {"    --ciphers <list of ciphers>",
   "SSL ciphers to use"},
  {"    --compressed",
   "Request compressed response"},
  {"    --compressed-ssh",
   "Enable SSH compression"},
  {"-K, --config <file>",
   "Read config from a file"},
  {"    --connect-timeout <seconds>",
   "Maximum time allowed for connection"},
  {"    --connect-to <HOST1:PORT1:HOST2:PORT2>",
   "Connect to host"},
  {"-C, --continue-at <offset>",
   "Resumed transfer offset"},
  {"-b, --cookie <data|filename>",
   "Send cookies from string/file"},
  {"-c, --cookie-jar <filename>",
   "Write cookies to <filename> after operation"},
  {"    --create-dirs",
   "Create necessary local directory hierarchy"},
  {"    --crlf",
   "Convert LF to CRLF in upload"},
  {"    --crlfile <file>",
   "Get a CRL list in PEM format from the given file"},
  {"-d, --data <data>",
   "HTTP POST data"},
  {"    --data-ascii <data>",
   "HTTP POST ASCII data"},
  {"    --data-binary <data>",
   "HTTP POST binary data"},
  {"    --data-raw <data>",
   "HTTP POST data, '@' allowed"},
  {"    --data-urlencode <data>",
   "HTTP POST data url encoded"},
  {"    --delegation <LEVEL>",
   "GSS-API delegation permission"},
  {"    --digest",
   "Use HTTP Digest Authentication"},
  {"-q, --disable",
   "Disable .curlrc"},
  {"    --disable-eprt",
   "Inhibit using EPRT or LPRT"},
  {"    --disable-epsv",
   "Inhibit using EPSV"},
  {"    --disallow-username-in-url",
   "Disallow username in url"},
  {"    --dns-interface <interface>",
   "Interface to use for DNS requests"},
  {"    --dns-ipv4-addr <address>",
   "IPv4 address to use for DNS requests"},
  {"    --dns-ipv6-addr <address>",
   "IPv6 address to use for DNS requests"},
  {"    --dns-servers <addresses>",
   "DNS server addrs to use"},
  {"    --doh-url <URL>",
   "Resolve host names over DOH"},
  {"-D, --dump-header <filename>",
   "Write the received headers to <filename>"},
  {"    --egd-file <file>",
   "EGD socket path for random data"},
  {"    --engine <name>",
   "Crypto engine to use"},
  {"    --expect100-timeout <seconds>",
   "How long to wait for 100-continue"},
  {"-f, --fail",
   "Fail silently (no output at all) on HTTP errors"},
  {"    --fail-early",
   "Fail on first transfer error, do not continue"},
  {"    --false-start",
   "Enable TLS False Start"},
  {"-F, --form <name=content>",
   "Specify multipart MIME data"},
  {"    --form-string <name=string>",
   "Specify multipart MIME data"},
  {"    --ftp-account <data>",
   "Account data string"},
  {"    --ftp-alternative-to-user <command>",
   "String to replace USER [name]"},
  {"    --ftp-create-dirs",
   "Create the remote dirs if not present"},
  {"    --ftp-method <method>",
   "Control CWD usage"},
  {"    --ftp-pasv",
   "Use PASV/EPSV instead of PORT"},
  {"-P, --ftp-port <address>",
   "Use PORT instead of PASV"},
  {"    --ftp-pret",
   "Send PRET before PASV"},
  {"    --ftp-skip-pasv-ip",
   "Skip the IP address for PASV"},
  {"    --ftp-ssl-ccc",
   "Send CCC after authenticating"},
  {"    --ftp-ssl-ccc-mode <active/passive>",
   "Set CCC mode"},
  {"    --ftp-ssl-control",
   "Require SSL/TLS for FTP login, clear for transfer"},
  {"-G, --get",
   "Put the post data in the URL and use GET"},
  {"-g, --globoff",
   "Disable URL sequences and ranges using {} and []"},
  {"    --happy-eyeballs-timeout-ms <milliseconds>",
   "How long to wait in milliseconds for IPv6 before trying IPv4"},
  {"    --haproxy-protocol",
   "Send HAProxy PROXY protocol v1 header"},
  {"-I, --head",
   "Show document info only"},
  {"-H, --header <header/@file>",
   "Pass custom header(s) to server"},
  {"-h, --help",
   "This help text"},
  {"    --hostpubmd5 <md5>",
   "Acceptable MD5 hash of the host public key"},
  {"    --http0.9",
   "Allow HTTP 0.9 responses"},
  {"-0, --http1.0",
   "Use HTTP 1.0"},
  {"    --http1.1",
   "Use HTTP 1.1"},
  {"    --http2",
   "Use HTTP 2"},
  {"    --http2-prior-knowledge",
   "Use HTTP 2 without HTTP/1.1 Upgrade"},
  {"    --http3",
   "Use HTTP v3"},
  {"    --ignore-content-length",
   "Ignore the size of the remote resource"},
  {"-i, --include",
   "Include protocol response headers in the output"},
  {"-k, --insecure",
   "Allow insecure server connections when using SSL"},
  {"    --interface <name>",
   "Use network INTERFACE (or address)"},
  {"-4, --ipv4",
   "Resolve names to IPv4 addresses"},
  {"-6, --ipv6",
   "Resolve names to IPv6 addresses"},
  {"-j, --junk-session-cookies",
   "Ignore session cookies read from file"},
  {"    --keepalive-time <seconds>",
   "Interval time for keepalive probes"},
  {"    --key <key>",
   "Private key file name"},
  {"    --key-type <type>",
   "Private key file type (DER/PEM/ENG)"},
  {"    --krb <level>",
   "Enable Kerberos with security <level>"},
  {"    --libcurl <file>",
   "Dump libcurl equivalent code of this command line"},
  {"    --limit-rate <speed>",
   "Limit transfer speed to RATE"},
  {"-l, --list-only",
   "List only mode"},
  {"    --local-port <num/range>",
   "Force use of RANGE for local port numbers"},
  {"-L, --location",
   "Follow redirects"},
  {"    --location-trusted",
   "Like --location, and send auth to other hosts"},
  {"    --login-options <options>",
   "Server login options"},
  {"    --mail-auth <address>",
   "Originator address of the original email"},
  {"    --mail-from <address>",
   "Mail from this address"},
  {"    --mail-rcpt <address>",
   "Mail to this address"},
  {"-M, --manual",
   "Display the full manual"},
  {"    --max-filesize <bytes>",
   "Maximum file size to download"},
  {"    --max-redirs <num>",
   "Maximum number of redirects allowed"},
  {"-m, --max-time <seconds>",
   "Maximum time allowed for the transfer"},
  {"    --metalink",
   "Process given URLs as metalink XML file"},
  {"    --negotiate",
   "Use HTTP Negotiate (SPNEGO) authentication"},
  {"-n, --netrc",
   "Must read .netrc for user name and password"},
  {"    --netrc-file <filename>",
   "Specify FILE for netrc"},
  {"    --netrc-optional",
   "Use either .netrc or URL"},
  {"-:, --next",
   "Make next URL use its separate set of options"},
  {"    --no-alpn",
   "Disable the ALPN TLS extension"},
  {"-N, --no-buffer",
   "Disable buffering of the output stream"},
  {"    --no-keepalive",
   "Disable TCP keepalive on the connection"},
  {"    --no-npn",
   "Disable the NPN TLS extension"},
  {"    --no-sessionid",
   "Disable SSL session-ID reusing"},
  {"    --noproxy <no-proxy-list>",
   "List of hosts which do not use proxy"},
  {"    --ntlm",
   "Use HTTP NTLM authentication"},
  {"    --ntlm-wb",
   "Use HTTP NTLM authentication with winbind"},
  {"    --oauth2-bearer <token>",
   "OAuth 2 Bearer Token"},
  {"-o, --output <file>",
   "Write to file instead of stdout"},
  {"-Z, --parallel",
   "Perform transfers in parallel"},
  {"    --parallel-max",
   "Maximum concurrency for parallel transfers"},
  {"    --pass <phrase>",
   "Pass phrase for the private key"},
  {"    --path-as-is",
   "Do not squash .. sequences in URL path"},
  {"    --pinnedpubkey <hashes>",
   "FILE/HASHES Public key to verify peer against"},
  {"    --post301",
   "Do not switch to GET after following a 301"},
  {"    --post302",
   "Do not switch to GET after following a 302"},
  {"    --post303",
   "Do not switch to GET after following a 303"},
  {"    --preproxy [protocol://]host[:port]",
   "Use this proxy first"},
  {"-#, --progress-bar",
   "Display transfer progress as a bar"},
  {"    --proto <protocols>",
   "Enable/disable PROTOCOLS"},
  {"    --proto-default <protocol>",
   "Use PROTOCOL for any URL missing a scheme"},
  {"    --proto-redir <protocols>",
   "Enable/disable PROTOCOLS on redirect"},
  {"-x, --proxy [protocol://]host[:port]",
   "Use this proxy"},
  {"    --proxy-anyauth",
   "Pick any proxy authentication method"},
  {"    --proxy-basic",
   "Use Basic authentication on the proxy"},
  {"    --proxy-cacert <file>",
   "CA certificate to verify peer against for proxy"},
  {"    --proxy-capath <dir>",
   "CA directory to verify peer against for proxy"},
  {"    --proxy-cert <cert[:passwd]>",
   "Set client certificate for proxy"},
  {"    --proxy-cert-type <type>",
   "Client certificate type for HTTPS proxy"},
  {"    --proxy-ciphers <list>",
   "SSL ciphers to use for proxy"},
  {"    --proxy-crlfile <file>",
   "Set a CRL list for proxy"},
  {"    --proxy-digest",
   "Use Digest authentication on the proxy"},
  {"    --proxy-header <header/@file>",
   "Pass custom header(s) to proxy"},
  {"    --proxy-insecure",
   "Do HTTPS proxy connections without verifying the proxy"},
  {"    --proxy-key <key>",
   "Private key for HTTPS proxy"},
  {"    --proxy-key-type <type>",
   "Private key file type for proxy"},
  {"    --proxy-negotiate",
   "Use HTTP Negotiate (SPNEGO) authentication on the proxy"},
  {"    --proxy-ntlm",
   "Use NTLM authentication on the proxy"},
  {"    --proxy-pass <phrase>",
   "Pass phrase for the private key for HTTPS proxy"},
  {"    --proxy-pinnedpubkey <hashes>",
   "FILE/HASHES public key to verify proxy with"},
  {"    --proxy-service-name <name>",
   "SPNEGO proxy service name"},
  {"    --proxy-ssl-allow-beast",
   "Allow security flaw for interop for HTTPS proxy"},
  {"    --proxy-tls13-ciphers <list>",
   "TLS 1.3 ciphersuites for proxy (OpenSSL)"},
  {"    --proxy-tlsauthtype <type>",
   "TLS authentication type for HTTPS proxy"},
  {"    --proxy-tlspassword <string>",
   "TLS password for HTTPS proxy"},
  {"    --proxy-tlsuser <name>",
   "TLS username for HTTPS proxy"},
  {"    --proxy-tlsv1",
   "Use TLSv1 for HTTPS proxy"},
  {"-U, --proxy-user <user:password>",
   "Proxy user and password"},
  {"    --proxy1.0 <host[:port]>",
   "Use HTTP/1.0 proxy on given port"},
  {"-p, --proxytunnel",
   "Operate through an HTTP proxy tunnel (using CONNECT)"},
  {"    --pubkey <key>",
   "SSH Public key file name"},
  {"-Q, --quote",
   "Send command(s) to server before transfer"},
  {"    --random-file <file>",
   "File for reading random data from"},
  {"-r, --range <range>",
   "Retrieve only the bytes within RANGE"},
  {"    --raw",
   "Do HTTP \"raw\"; no transfer decoding"},
  {"-e, --referer <URL>",
   "Referrer URL"},
  {"-J, --remote-header-name",
   "Use the header-provided filename"},
  {"-O, --remote-name",
   "Write output to a file named as the remote file"},
  {"    --remote-name-all",
   "Use the remote file name for all URLs"},
  {"-R, --remote-time",
   "Set the remote file's time on the local output"},
  {"-X, --request <command>",
   "Specify request command to use"},
  {"    --request-target",
   "Specify the target for this request"},
  {"    --resolve <host:port:address[,address]...>",
   "Resolve the host+port to this address"},
  {"    --retry <num>",
   "Retry request if transient problems occur"},
  {"    --retry-connrefused",
   "Retry on connection refused (use with --retry)"},
  {"    --retry-delay <seconds>",
   "Wait time between retries"},
  {"    --retry-max-time <seconds>",
   "Retry only within this period"},
  {"    --sasl-authzid <identity> ",
   "Use this identity to act as during SASL PLAIN authentication"},
  {"    --sasl-ir",
   "Enable initial response in SASL authentication"},
  {"    --service-name <name>",
   "SPNEGO service name"},
  {"-S, --show-error",
   "Show error even when -s is used"},
  {"-s, --silent",
   "Silent mode"},
  {"    --socks4 <host[:port]>",
   "SOCKS4 proxy on given host + port"},
  {"    --socks4a <host[:port]>",
   "SOCKS4a proxy on given host + port"},
  {"    --socks5 <host[:port]>",
   "SOCKS5 proxy on given host + port"},
  {"    --socks5-basic",
   "Enable username/password auth for SOCKS5 proxies"},
  {"    --socks5-gssapi",
   "Enable GSS-API auth for SOCKS5 proxies"},
  {"    --socks5-gssapi-nec",
   "Compatibility with NEC SOCKS5 server"},
  {"    --socks5-gssapi-service <name>",
   "SOCKS5 proxy service name for GSS-API"},
  {"    --socks5-hostname <host[:port]>",
   "SOCKS5 proxy, pass host name to proxy"},
  {"-Y, --speed-limit <speed>",
   "Stop transfers slower than this"},
  {"-y, --speed-time <seconds>",
   "Trigger 'speed-limit' abort after this time"},
  {"    --ssl",
   "Try SSL/TLS"},
  {"    --ssl-allow-beast",
   "Allow security flaw to improve interop"},
  {"    --ssl-no-revoke",
   "Disable cert revocation checks (Schannel)"},
  {"    --ssl-reqd",
   "Require SSL/TLS"},
  {"-2, --sslv2",
   "Use SSLv2"},
  {"-3, --sslv3",
   "Use SSLv3"},
  {"    --stderr",
   "Where to redirect stderr"},
  {"    --styled-output",
   "Enable styled output for HTTP headers"},
  {"    --suppress-connect-headers",
   "Suppress proxy CONNECT response headers"},
  {"    --tcp-fastopen",
   "Use TCP Fast Open"},
  {"    --tcp-nodelay",
   "Use the TCP_NODELAY option"},
  {"-t, --telnet-option <opt=val>",
   "Set telnet option"},
  {"    --tftp-blksize <value>",
   "Set TFTP BLKSIZE option"},
  {"    --tftp-no-options",
   "Do not send any TFTP options"},
  {"-z, --time-cond <time>",
   "Transfer based on a time condition"},
  {"    --tls-max <VERSION>",
   "Set maximum allowed TLS version"},
  {"    --tls13-ciphers <list>",
   "TLS 1.3 ciphersuites (OpenSSL)"},
  {"    --tlsauthtype <type>",
   "TLS authentication type"},
  {"    --tlspassword",
   "TLS password"},
  {"    --tlsuser <name>",
   "TLS user name"},
  {"-1, --tlsv1",
   "Use TLSv1.0 or greater"},
  {"    --tlsv1.0",
   "Use TLSv1.0 or greater"},
  {"    --tlsv1.1",
   "Use TLSv1.1 or greater"},
  {"    --tlsv1.2",
   "Use TLSv1.2 or greater"},
  {"    --tlsv1.3",
   "Use TLSv1.3 or greater"},
  {"    --tr-encoding",
   "Request compressed transfer encoding"},
  {"    --trace <file>",
   "Write a debug trace to FILE"},
  {"    --trace-ascii <file>",
   "Like --trace, but without hex output"},
  {"    --trace-time",
   "Add time stamps to trace/verbose output"},
  {"    --unix-socket <path>",
   "Connect through this Unix domain socket"},
  {"-T, --upload-file <file>",
   "Transfer local FILE to destination"},
  {"    --url <url>",
   "URL to work with"},
  {"-B, --use-ascii",
   "Use ASCII/text transfer"},
  {"-u, --user <user:password>",
   "Server user and password"},
  {"-A, --user-agent <name>",
   "Send User-Agent <name> to server"},
  {"-v, --verbose",
   "Make the operation more talkative"},
  {"-V, --version",
   "Show version number and quit"},
  {"-w, --write-out <format>",
   "Use output FORMAT after completion"},
  {"    --xattr",
   "Store metadata in extended file attributes"},
  { NULL, NULL }
};

#ifdef NETWARE
#  define PRINT_LINES_PAUSE 23
#endif

#ifdef __SYMBIAN32__
#  define PRINT_LINES_PAUSE 16
#endif

struct feat {
  const char *name;
  int bitmask;
};

static const struct feat feats[] = {
  {"AsynchDNS",      CURL_VERSION_ASYNCHDNS},
  {"Debug",          CURL_VERSION_DEBUG},
  {"TrackMemory",    CURL_VERSION_CURLDEBUG},
  {"IDN",            CURL_VERSION_IDN},
  {"IPv6",           CURL_VERSION_IPV6},
  {"Largefile",      CURL_VERSION_LARGEFILE},
  {"SSPI",           CURL_VERSION_SSPI},
  {"GSS-API",        CURL_VERSION_GSSAPI},
  {"Kerberos",       CURL_VERSION_KERBEROS5},
  {"SPNEGO",         CURL_VERSION_SPNEGO},
  {"NTLM",           CURL_VERSION_NTLM},
  {"NTLM_WB",        CURL_VERSION_NTLM_WB},
  {"SSL",            CURL_VERSION_SSL},
  {"libz",           CURL_VERSION_LIBZ},
  {"brotli",         CURL_VERSION_BROTLI},
  {"CharConv",       CURL_VERSION_CONV},
  {"TLS-SRP",        CURL_VERSION_TLSAUTH_SRP},
  {"HTTP2",          CURL_VERSION_HTTP2},
  {"HTTP3",          CURL_VERSION_HTTP3},
  {"UnixSockets",    CURL_VERSION_UNIX_SOCKETS},
  {"HTTPS-proxy",    CURL_VERSION_HTTPS_PROXY},
  {"MultiSSL",       CURL_VERSION_MULTI_SSL},
  {"PSL",            CURL_VERSION_PSL},
  {"alt-svc",        CURL_VERSION_ALTSVC},
};

void tool_help(void)
{
  int i;
  puts("Usage: curl [options...] <url>");
  for(i = 0; helptext[i].opt; i++) {
    printf(" %-19s %s\n", helptext[i].opt, helptext[i].desc);
#ifdef PRINT_LINES_PAUSE
    if(i && ((i % PRINT_LINES_PAUSE) == 0))
      tool_pressanykey();
#endif
  }
}

static int
featcomp(const void *p1, const void *p2)
{
  /* The arguments to this function are "pointers to pointers to char", but
     the comparison arguments are "pointers to char", hence the following cast
     plus dereference */
#ifdef HAVE_STRCASECMP
  return strcasecmp(* (char * const *) p1, * (char * const *) p2);
#elif defined(HAVE_STRCMPI)
  return strcmpi(* (char * const *) p1, * (char * const *) p2);
#else
  return strcmp(* (char * const *) p1, * (char * const *) p2);
#endif
}

void tool_version_info(void)
{
  const char *const *proto;

  printf(CURL_ID "%s\n", curl_version());
#ifdef CURL_PATCHSTAMP
  printf("Release-Date: %s, security patched: %s\n",
         LIBCURL_TIMESTAMP, CURL_PATCHSTAMP);
#else
  printf("Release-Date: %s\n", LIBCURL_TIMESTAMP);
#endif
  if(curlinfo->protocols) {
    printf("Protocols: ");
    for(proto = curlinfo->protocols; *proto; ++proto) {
      printf("%s ", *proto);
    }
    puts(""); /* newline */
  }
  if(curlinfo->features) {
    char *featp[ sizeof(feats) / sizeof(feats[0]) + 1];
    size_t numfeat = 0;
    unsigned int i;
    printf("Features:");
    for(i = 0; i < sizeof(feats)/sizeof(feats[0]); i++) {
      if(curlinfo->features & feats[i].bitmask)
        featp[numfeat++] = (char *)feats[i].name;
    }
#ifdef USE_METALINK
    featp[numfeat++] = (char *)"Metalink";
#endif
    qsort(&featp[0], numfeat, sizeof(char *), featcomp);
    for(i = 0; i< numfeat; i++)
      printf(" %s", featp[i]);
    puts(""); /* newline */
  }
  if(strcmp(CURL_VERSION, curlinfo->version)) {
    printf("WARNING: curl and libcurl versions do not match. "
           "Functionality may be affected.\n");
  }
}

void tool_list_engines(void)
{
  CURL *curl = curl_easy_init();
  struct curl_slist *engines = NULL;

  /* Get the list of engines */
  curl_easy_getinfo(curl, CURLINFO_SSL_ENGINES, &engines);

  puts("Build-time engines:");
  if(engines) {
    for(; engines; engines = engines->next)
      printf("  %s\n", engines->data);
  }
  else {
    puts("  <none>");
  }

  /* Cleanup the list of engines */
  curl_slist_free_all(engines);
  curl_easy_cleanup(curl);
}