7 * Some command-line parameters need to be saved up until after
8 * we've loaded the saved session which will form the basis of our
9 * eventual running configuration. For this we use the macro
10 * SAVEABLE, which notices if the `need_save' parameter is set and
11 * saves the parameter and value on a list.
13 * We also assign priorities to saved parameters, just to slightly
14 * ameliorate silly ordering problems. For example, if you specify
15 * a saved session to load, it will be loaded _before_ all your
16 * local modifications such as -L are evaluated; and if you specify
17 * a protocol and a port, the protocol is set up first so that the
18 * port can override its choice of port number.
23 struct cmdline_saved_param {
26 struct cmdline_saved_param_set {
27 struct cmdline_saved_param *params;
32 * C guarantees this structure will be initialised to all zero at
33 * program start, which is exactly what we want.
35 static struct cmdline_saved_param_set saves[NPRIORITIES];
37 static void cmdline_save_param(char *p, char *value, int pri)
39 if (saves[pri].nsaved >= saves[pri].savesize) {
40 saves[pri].savesize = saves[pri].nsaved + 32;
42 srealloc(saves[pri].params,
43 saves[pri].savesize*sizeof(*saves[pri].params));
45 saves[pri].params[saves[pri].nsaved].p = p;
46 saves[pri].params[saves[pri].nsaved].value = value;
50 #define SAVEABLE(pri) do { \
51 if (need_save) { cmdline_save_param(p, value, pri); return ret; } \
54 char *cmdline_password = NULL;
56 static int cmdline_get_line(const char *prompt, char *str,
57 int maxlen, int is_pw)
59 static int tried_once = 0;
61 assert(is_pw && cmdline_password);
66 strncpy(str, cmdline_password, maxlen);
67 str[maxlen - 1] = '\0';
74 * Here we have a flags word which describes the capabilities of
75 * the particular tool on whose behalf we're running. We will
76 * refuse certain command-line options if a particular tool
77 * inherently can't do anything sensible. For example, the file
78 * transfer tools (psftp, pscp) can't do a great deal with protocol
79 * selections (ever tried running scp over telnet?) or with port
80 * forwarding (even if it wasn't a hideously bad idea, they don't
81 * have the select() infrastructure to make them work).
83 int cmdline_tooltype = 0;
85 static int cmdline_check_unavailable(int flag, char *p)
87 if (cmdline_tooltype & flag) {
88 cmdline_error("option \"%s\" not available in this tool", p);
94 #define UNAVAILABLE_IN(flag) do { \
95 if (cmdline_check_unavailable(flag, p)) return ret; \
99 * Process a standard command-line parameter. `p' is the parameter
100 * in question; `value' is the subsequent element of argv, which
101 * may or may not be required as an operand to the parameter.
102 * Return value is 2 if both arguments were used; 1 if only p was
103 * used; 0 if the parameter wasn't one we recognised; -2 if it
104 * should have been 2 but value was NULL.
107 #define RETURN(x) do { \
108 if ((x) == 2 && !value) return -2; \
112 int cmdline_process_param(char *p, char *value, int need_save, Config *cfg)
116 if (!strcmp(p, "-load")) {
118 SAVEABLE(0); /* very high priority */
119 do_defaults(value, cfg);
122 if (!strcmp(p, "-ssh")) {
124 UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER);
126 default_protocol = cfg->protocol = PROT_SSH;
127 default_port = cfg->port = 22;
130 if (!strcmp(p, "-telnet")) {
132 UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER);
134 default_protocol = cfg->protocol = PROT_TELNET;
135 default_port = cfg->port = 23;
138 if (!strcmp(p, "-rlogin")) {
140 UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER);
142 default_protocol = cfg->protocol = PROT_RLOGIN;
143 default_port = cfg->port = 513;
146 if (!strcmp(p, "-raw")) {
148 UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER);
150 default_protocol = cfg->protocol = PROT_RAW;
152 if (!strcmp(p, "-v")) {
154 flags |= FLAG_VERBOSE;
156 if (!strcmp(p, "-l")) {
159 strncpy(cfg->username, value, sizeof(cfg->username));
160 cfg->username[sizeof(cfg->username) - 1] = '\0';
162 if ((!strcmp(p, "-L") || !strcmp(p, "-R"))) {
163 char *fwd, *ptr, *q, *qq;
166 UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER);
170 /* if multiple forwards, find end of list */
171 if (ptr[0]=='R' || ptr[0]=='L') {
172 for (i = 0; i < sizeof(cfg->portfwd) - 2; i++)
173 if (ptr[i]=='\000' && ptr[i+1]=='\000')
175 ptr = ptr + i + 1; /* point to next forward slot */
177 ptr[0] = p[1]; /* insert a 'L' or 'R' at the start */
178 if (strlen(fwd) > sizeof(cfg->portfwd) - i - 2) {
179 cmdline_error("out of space for port forwardings");
182 strncpy(ptr+1, fwd, sizeof(cfg->portfwd) - i);
184 * We expect _at least_ two colons in this string. The
185 * possible formats are `sourceport:desthost:destport', or
186 * `sourceip:sourceport:desthost:destport' if you're
187 * specifying a particular loopback address. We need to
188 * replace the one between source and dest with a \t; this
189 * means we must find the second-to-last colon in the
192 q = qq = strchr(ptr, ':');
194 char *qqq = strchr(qq+1, ':');
199 if (q) *q = '\t'; /* replace second-last colon with \t */
200 cfg->portfwd[sizeof(cfg->portfwd) - 1] = '\0';
201 cfg->portfwd[sizeof(cfg->portfwd) - 2] = '\0';
202 ptr[strlen(ptr)+1] = '\000'; /* append two '\000' */
204 if (!strcmp(p, "-m")) {
205 char *filename, *command;
211 UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER);
216 cmdlen = cmdsize = 0;
218 fp = fopen(filename, "r");
220 cmdline_error("unable to open command "
221 "file \"%s\"", filename);
229 if (cmdlen >= cmdsize) {
230 cmdsize = cmdlen + 512;
231 command = srealloc(command, cmdsize);
233 command[cmdlen++] = d;
235 cfg->remote_cmd_ptr = command;
236 cfg->remote_cmd_ptr2 = NULL;
237 cfg->nopty = TRUE; /* command => no terminal */
239 if (!strcmp(p, "-P")) {
241 SAVEABLE(2); /* lower priority than -ssh,-telnet */
242 cfg->port = atoi(value);
244 if (!strcmp(p, "-pw")) {
246 cmdline_password = value;
247 ssh_get_line = cmdline_get_line;
248 ssh_getline_pw_only = TRUE;
251 if (!strcmp(p, "-A")) {
253 UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER);
257 if (!strcmp(p, "-a")) {
259 UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER);
264 if (!strcmp(p, "-X")) {
266 UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER);
268 cfg->x11_forward = 1;
270 if (!strcmp(p, "-x")) {
272 UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER);
274 cfg->x11_forward = 0;
277 if (!strcmp(p, "-t")) {
279 UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER);
283 if (!strcmp(p, "-T")) {
285 UNAVAILABLE_IN(TOOLTYPE_FILETRANSFER);
290 if (!strcmp(p, "-C")) {
293 cfg->compression = 1;
296 if (!strcmp(p, "-1")) {
299 cfg->sshprot = 0; /* ssh protocol 1 only */
301 if (!strcmp(p, "-2")) {
304 cfg->sshprot = 3; /* ssh protocol 2 only */
307 if (!strcmp(p, "-i")) {
310 cfg->keyfile = filename_from_str(value);
313 return ret; /* unrecognised */
316 void cmdline_run_saved(Config *cfg)
319 for (pri = 0; pri < NPRIORITIES; pri++)
320 for (i = 0; i < saves[pri].nsaved; i++)
321 cmdline_process_param(saves[pri].params[i].p,
322 saves[pri].params[i].value, 0, cfg);