2 * uxstore.c: Unix-specific implementation of the interface defined
12 #include <sys/types.h>
18 * For the moment, the only existing Unix utility is pterm and that
19 * has no GUI configuration at all, so our write routines need do
20 * nothing. Eventually I suppose these will read and write an rc
21 * file somewhere or other.
24 void *open_settings_w(const char *sessionname)
29 void write_setting_s(void *handle, const char *key, const char *value)
33 void write_setting_i(void *handle, const char *key, int value)
37 void close_settings_w(void *handle)
42 * Reading settings, for the moment, is done by retrieving X
43 * resources from the X display. When we introduce disk files, I
44 * think what will happen is that the X resources will override
45 * PuTTY's inbuilt defaults, but that the disk files will then
46 * override those. This isn't optimal, but it's the best I can
47 * immediately work out.
55 static tree234 *xrmtree = NULL;
57 int xrmcmp(void *av, void *bv)
59 struct xrm_string *a = (struct xrm_string *)av;
60 struct xrm_string *b = (struct xrm_string *)bv;
61 return strcmp(a->key, b->key);
64 void provide_xrm_string(char *string)
67 struct xrm_string *xrms, *ret;
69 p = q = strchr(string, ':');
71 fprintf(stderr, "pterm: expected a colon in resource string"
76 while (p > string && p[-1] != '.' && p[-1] != '*')
78 xrms = smalloc(sizeof(struct xrm_string));
83 while (*q && isspace((unsigned char)*q))
85 xrms->value = dupstr(q);
88 xrmtree = newtree234(xrmcmp);
90 ret = add234(xrmtree, xrms);
92 /* Override an existing string. */
94 add234(xrmtree, xrms);
98 const char *get_setting(const char *key)
100 struct xrm_string tmp, *ret;
103 ret = find234(xrmtree, &tmp, NULL);
107 return x_get_default(key);
110 void *open_settings_r(const char *sessionname)
112 static int thing_to_return_an_arbitrary_non_null_pointer_to;
113 return &thing_to_return_an_arbitrary_non_null_pointer_to;
116 char *read_setting_s(void *handle, const char *key, char *buffer, int buflen)
118 const char *val = get_setting(key);
122 strncpy(buffer, val, buflen);
123 buffer[buflen-1] = '\0';
128 int read_setting_i(void *handle, const char *key, int defvalue)
130 const char *val = get_setting(key);
137 int read_setting_fontspec(void *handle, const char *name, FontSpec *result)
139 return !!read_setting_s(handle, name, result->name, sizeof(result->name));
141 int read_setting_filename(void *handle, const char *name, Filename *result)
143 return !!read_setting_s(handle, name, result->path, sizeof(result->path));
146 void write_setting_fontspec(void *handle, const char *name, FontSpec result)
148 write_setting_s(handle, name, result.name);
150 void write_setting_filename(void *handle, const char *name, Filename result)
152 write_setting_s(handle, name, result.path);
155 void close_settings_r(void *handle)
159 void del_settings(const char *sessionname)
163 void *enum_settings_start(void)
168 char *enum_settings_next(void *handle, char *buffer, int buflen)
173 void enum_settings_finish(void *handle)
178 INDEX_DIR, INDEX_HOSTKEYS, INDEX_RANDSEED
181 static void make_filename(char *filename, int index)
185 home = getenv("HOME");
186 strncpy(filename, home, FILENAME_MAX);
187 len = strlen(filename);
188 strncpy(filename + len,
189 index == INDEX_DIR ? "/.putty" :
190 index == INDEX_HOSTKEYS ? "/.putty/sshhostkeys" :
191 index == INDEX_RANDSEED ? "/.putty/randomseed" :
192 "/.putty/ERROR", FILENAME_MAX - len);
193 filename[FILENAME_MAX-1] = '\0';
197 * Read an entire line of text from a file. Return a buffer
198 * malloced to be as big as necessary (caller must free).
200 static char *fgetline(FILE *fp)
202 char *ret = smalloc(512);
203 int size = 512, len = 0;
204 while (fgets(ret + len, size - len, fp)) {
205 len += strlen(ret + len);
206 if (ret[len-1] == '\n')
207 break; /* got a newline, we're done */
209 ret = srealloc(ret, size);
211 if (len == 0) { /* first fgets returned NULL */
220 * Lines in the host keys file are of the form
222 * type@port:hostname keydata
226 * rsa@22:foovax.example.org 0x23,0x293487364395345345....2343
228 int verify_host_key(const char *hostname, int port,
229 const char *keytype, const char *key)
232 char filename[FILENAME_MAX];
236 make_filename(filename, INDEX_HOSTKEYS);
237 fp = fopen(filename, "r");
239 return 1; /* key does not exist */
242 while ( (line = fgetline(fp)) ) {
247 line[strcspn(line, "\n")] = '\0'; /* strip trailing newline */
250 if (strncmp(p, keytype, i))
258 sprintf(porttext, "%d", port);
259 i = strlen(porttext);
260 if (strncmp(p, porttext, i))
268 i = strlen(hostname);
269 if (strncmp(p, hostname, i))
278 * Found the key. Now just work out whether it's the right
282 ret = 0; /* key matched OK */
284 ret = 2; /* key mismatch */
295 void store_host_key(const char *hostname, int port,
296 const char *keytype, const char *key)
300 char filename[FILENAME_MAX];
302 make_filename(filename, INDEX_HOSTKEYS);
303 fd = open(filename, O_CREAT | O_APPEND | O_RDWR, 0600);
305 char dir[FILENAME_MAX];
307 make_filename(dir, INDEX_DIR);
309 fd = open(filename, O_CREAT | O_APPEND | O_RDWR, 0600);
315 fp = fdopen(fd, "a");
316 fprintf(fp, "%s@%d:%s %s\n", keytype, port, hostname, key);
320 void read_random_seed(noise_consumer_t consumer)
323 char fname[FILENAME_MAX];
325 make_filename(fname, INDEX_RANDSEED);
326 fd = open(fname, O_RDONLY);
330 while ( (ret = read(fd, buf, sizeof(buf))) > 0)
336 void write_random_seed(void *data, int len)
339 char fname[FILENAME_MAX];
341 make_filename(fname, INDEX_RANDSEED);
343 * Don't truncate the random seed file if it already exists; if
344 * something goes wrong half way through writing it, it would
345 * be better to leave the old data there than to leave it empty.
347 fd = open(fname, O_CREAT | O_WRONLY, 0600);
349 char dir[FILENAME_MAX];
351 make_filename(dir, INDEX_DIR);
353 fd = open(fname, O_CREAT | O_WRONLY, 0600);
357 int ret = write(fd, data, len);
360 data = (char *)data + len;
366 void cleanup_all(void)