#include <stdio.h>
#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <errno.h>
#include <ctype.h>
+#include <limits.h>
#include <unistd.h>
#include <fcntl.h>
+#include <dirent.h>
#include <sys/stat.h>
#include <sys/types.h>
+#include <pwd.h>
#include "putty.h"
#include "storage.h"
#include "tree234.h"
-/*
- * For the moment, the only existing Unix utility is pterm and that
- * has no GUI configuration at all, so our write routines need do
- * nothing. Eventually I suppose these will read and write an rc
- * file somewhere or other.
- */
+#ifdef PATH_MAX
+#define FNLEN PATH_MAX
+#else
+#define FNLEN 1024 /* XXX */
+#endif
-void *open_settings_w(const char *sessionname)
+enum {
+ INDEX_DIR, INDEX_HOSTKEYS, INDEX_HOSTKEYS_TMP, INDEX_RANDSEED,
+ INDEX_SESSIONDIR, INDEX_SESSION,
+};
+
+static const char hex[16] = "0123456789ABCDEF";
+
+static char *mungestr(const char *in)
{
- return NULL;
+ char *out, *ret;
+
+ if (!in || !*in)
+ in = "Default Settings";
+
+ ret = out = snewn(3*strlen(in)+1, char);
+
+ while (*in) {
+ /*
+ * There are remarkably few punctuation characters that
+ * aren't shell-special in some way or likely to be used as
+ * separators in some file format or another! Hence we use
+ * opt-in for safe characters rather than opt-out for
+ * specific unsafe ones...
+ */
+ if (*in!='+' && *in!='-' && *in!='.' && *in!='@' && *in!='_' &&
+ !(*in >= '0' && *in <= '9') &&
+ !(*in >= 'A' && *in <= 'Z') &&
+ !(*in >= 'a' && *in <= 'z')) {
+ *out++ = '%';
+ *out++ = hex[((unsigned char) *in) >> 4];
+ *out++ = hex[((unsigned char) *in) & 15];
+ } else
+ *out++ = *in;
+ in++;
+ }
+ *out = '\0';
+ return ret;
+}
+
+static char *unmungestr(const char *in)
+{
+ char *out, *ret;
+ out = ret = snewn(strlen(in)+1, char);
+ while (*in) {
+ if (*in == '%' && in[1] && in[2]) {
+ int i, j;
+
+ i = in[1] - '0';
+ i -= (i > 9 ? 7 : 0);
+ j = in[2] - '0';
+ j -= (j > 9 ? 7 : 0);
+
+ *out++ = (i << 4) + j;
+ in += 3;
+ } else {
+ *out++ = *in++;
+ }
+ }
+ *out = '\0';
+ return ret;
+}
+
+static char *make_filename(int index, const char *subname)
+{
+ char *env, *tmp, *ret;
+
+ /*
+ * Allow override of the PuTTY configuration location, and of
+ * specific subparts of it, by means of environment variables.
+ */
+ if (index == INDEX_DIR) {
+ struct passwd *pwd;
+
+ env = getenv("PUTTYDIR");
+ if (env)
+ return dupstr(env);
+ env = getenv("HOME");
+ if (env)
+ return dupprintf("%s/.putty", env);
+ pwd = getpwuid(getuid());
+ if (pwd && pwd->pw_dir)
+ return dupprintf("%s/.putty", pwd->pw_dir);
+ return dupstr("/.putty");
+ }
+ if (index == INDEX_SESSIONDIR) {
+ env = getenv("PUTTYSESSIONS");
+ if (env)
+ return dupstr(env);
+ tmp = make_filename(INDEX_DIR, NULL);
+ ret = dupprintf("%s/sessions", tmp);
+ sfree(tmp);
+ return ret;
+ }
+ if (index == INDEX_SESSION) {
+ char *munged = mungestr(subname);
+ tmp = make_filename(INDEX_SESSIONDIR, NULL);
+ ret = dupprintf("%s/%s", tmp, munged);
+ sfree(tmp);
+ sfree(munged);
+ return ret;
+ }
+ if (index == INDEX_HOSTKEYS) {
+ env = getenv("PUTTYSSHHOSTKEYS");
+ if (env)
+ return dupstr(env);
+ tmp = make_filename(INDEX_DIR, NULL);
+ ret = dupprintf("%s/sshhostkeys", tmp);
+ sfree(tmp);
+ return ret;
+ }
+ if (index == INDEX_HOSTKEYS_TMP) {
+ tmp = make_filename(INDEX_HOSTKEYS, NULL);
+ ret = dupprintf("%s.tmp", tmp);
+ sfree(tmp);
+ return ret;
+ }
+ if (index == INDEX_RANDSEED) {
+ env = getenv("PUTTYRANDOMSEED");
+ if (env)
+ return dupstr(env);
+ tmp = make_filename(INDEX_DIR, NULL);
+ ret = dupprintf("%s/randomseed", tmp);
+ sfree(tmp);
+ return ret;
+ }
+ tmp = make_filename(INDEX_DIR, NULL);
+ ret = dupprintf("%s/ERROR", tmp);
+ sfree(tmp);
+ return ret;
+}
+
+void *open_settings_w(const char *sessionname, char **errmsg)
+{
+ char *filename;
+ FILE *fp;
+
+ *errmsg = NULL;
+
+ /*
+ * Start by making sure the .putty directory and its sessions
+ * subdir actually exist. Ignore error returns from mkdir since
+ * they're perfectly likely to be `already exists', and any
+ * other error will trip us up later on so there's no real need
+ * to catch it now.
+ */
+ filename = make_filename(INDEX_SESSIONDIR, NULL);
+ if (mkdir(filename, 0700) != 0) {
+ char *filename2 = make_filename(INDEX_DIR, NULL);
+ mkdir(filename2, 0700);
+ sfree(filename2);
+ mkdir(filename, 0700);
+ }
+ sfree(filename);
+
+ filename = make_filename(INDEX_SESSION, sessionname);
+ fp = fopen(filename, "w");
+ if (!fp) {
+ *errmsg = dupprintf("Unable to create %s: %s",
+ filename, strerror(errno));
+ sfree(filename);
+ return NULL; /* can't open */
+ }
+ sfree(filename);
+ return fp;
}
void write_setting_s(void *handle, const char *key, const char *value)
{
+ FILE *fp = (FILE *)handle;
+ fprintf(fp, "%s=%s\n", key, value);
}
void write_setting_i(void *handle, const char *key, int value)
{
+ FILE *fp = (FILE *)handle;
+ fprintf(fp, "%s=%d\n", key, value);
}
void close_settings_w(void *handle)
{
+ FILE *fp = (FILE *)handle;
+ fclose(fp);
}
/*
* PuTTY's inbuilt defaults, but that the disk files will then
* override those. This isn't optimal, but it's the best I can
* immediately work out.
+ * FIXME: the above comment is a bit out of date. Did it happen?
*/
-struct xrm_string {
+struct skeyval {
const char *key;
const char *value;
};
static tree234 *xrmtree = NULL;
-int xrmcmp(void *av, void *bv)
+int keycmp(void *av, void *bv)
{
- struct xrm_string *a = (struct xrm_string *)av;
- struct xrm_string *b = (struct xrm_string *)bv;
+ struct skeyval *a = (struct skeyval *)av;
+ struct skeyval *b = (struct skeyval *)bv;
return strcmp(a->key, b->key);
}
void provide_xrm_string(char *string)
{
char *p, *q, *key;
- struct xrm_string *xrms, *ret;
+ struct skeyval *xrms, *ret;
p = q = strchr(string, ':');
if (!q) {
q++;
while (p > string && p[-1] != '.' && p[-1] != '*')
p--;
- xrms = smalloc(sizeof(struct xrm_string));
- key = smalloc(q-p);
+ xrms = snew(struct skeyval);
+ key = snewn(q-p, char);
memcpy(key, p, q-p);
key[q-p-1] = '\0';
xrms->key = key;
xrms->value = dupstr(q);
if (!xrmtree)
- xrmtree = newtree234(xrmcmp);
+ xrmtree = newtree234(keycmp);
ret = add234(xrmtree, xrms);
if (ret) {
const char *get_setting(const char *key)
{
- struct xrm_string tmp, *ret;
+ struct skeyval tmp, *ret;
tmp.key = key;
if (xrmtree) {
ret = find234(xrmtree, &tmp, NULL);
void *open_settings_r(const char *sessionname)
{
- static int thing_to_return_an_arbitrary_non_null_pointer_to;
- return &thing_to_return_an_arbitrary_non_null_pointer_to;
+ char *filename;
+ FILE *fp;
+ char *line;
+ tree234 *ret;
+
+ filename = make_filename(INDEX_SESSION, sessionname);
+ fp = fopen(filename, "r");
+ sfree(filename);
+ if (!fp)
+ return NULL; /* can't open */
+
+ ret = newtree234(keycmp);
+
+ while ( (line = fgetline(fp)) ) {
+ char *value = strchr(line, '=');
+ struct skeyval *kv;
+
+ if (!value) {
+ sfree(line);
+ continue;
+ }
+ *value++ = '\0';
+ value[strcspn(value, "\r\n")] = '\0'; /* trim trailing NL */
+
+ kv = snew(struct skeyval);
+ kv->key = dupstr(line);
+ kv->value = dupstr(value);
+ add234(ret, kv);
+
+ sfree(line);
+ }
+
+ fclose(fp);
+
+ return ret;
}
-char *read_setting_s(void *handle, const char *key, char *buffer, int buflen)
+char *read_setting_s(void *handle, const char *key)
{
- const char *val = get_setting(key);
+ tree234 *tree = (tree234 *)handle;
+ const char *val;
+ struct skeyval tmp, *kv;
+
+ tmp.key = key;
+ if (tree != NULL &&
+ (kv = find234(tree, &tmp, NULL)) != NULL) {
+ val = kv->value;
+ assert(val != NULL);
+ } else
+ val = get_setting(key);
+
if (!val)
return NULL;
- else {
- strncpy(buffer, val, buflen);
- buffer[buflen-1] = '\0';
- return buffer;
- }
+ else
+ return dupstr(val);
}
int read_setting_i(void *handle, const char *key, int defvalue)
{
- const char *val = get_setting(key);
+ tree234 *tree = (tree234 *)handle;
+ const char *val;
+ struct skeyval tmp, *kv;
+
+ tmp.key = key;
+ if (tree != NULL &&
+ (kv = find234(tree, &tmp, NULL)) != NULL) {
+ val = kv->value;
+ assert(val != NULL);
+ } else
+ val = get_setting(key);
+
if (!val)
return defvalue;
else
return atoi(val);
}
-int read_setting_fontspec(void *handle, const char *name, FontSpec *result)
+FontSpec *read_setting_fontspec(void *handle, const char *name)
{
- return !!read_setting_s(handle, name, result->name, sizeof(result->name));
+ /*
+ * In GTK1-only PuTTY, we used to store font names simply as a
+ * valid X font description string (logical or alias), under a
+ * bare key such as "Font".
+ *
+ * In GTK2 PuTTY, we have a prefix system where "client:"
+ * indicates a Pango font and "server:" an X one; existing
+ * configuration needs to be reinterpreted as having the
+ * "server:" prefix, so we change the storage key from the
+ * provided name string (e.g. "Font") to a suffixed one
+ * ("FontName").
+ */
+ char *suffname = dupcat(name, "Name", NULL);
+ char *tmp;
+
+ if ((tmp = read_setting_s(handle, suffname)) != NULL) {
+ FontSpec *fs = fontspec_new(tmp);
+ sfree(suffname);
+ sfree(tmp);
+ return fs; /* got new-style name */
+ }
+ sfree(suffname);
+
+ /* Fall back to old-style name. */
+ tmp = read_setting_s(handle, name);
+ if (tmp && *tmp) {
+ char *tmp2 = dupcat("server:", tmp, NULL);
+ FontSpec *fs = fontspec_new(tmp2);
+ sfree(tmp2);
+ sfree(tmp);
+ return fs;
+ } else {
+ sfree(tmp);
+ return NULL;
+ }
}
-int read_setting_filename(void *handle, const char *name, Filename *result)
+Filename *read_setting_filename(void *handle, const char *name)
{
- return !!read_setting_s(handle, name, result->path, sizeof(result->path));
+ char *tmp = read_setting_s(handle, name);
+ if (tmp) {
+ Filename *ret = filename_from_str(tmp);
+ sfree(tmp);
+ return ret;
+ } else
+ return NULL;
}
-void write_setting_fontspec(void *handle, const char *name, FontSpec result)
+void write_setting_fontspec(void *handle, const char *name, FontSpec *fs)
{
- write_setting_s(handle, name, result.name);
+ /*
+ * read_setting_fontspec had to handle two cases, but when
+ * writing our settings back out we simply always generate the
+ * new-style name.
+ */
+ char *suffname = dupcat(name, "Name", NULL);
+ write_setting_s(handle, suffname, fs->name);
+ sfree(suffname);
}
-void write_setting_filename(void *handle, const char *name, Filename result)
+void write_setting_filename(void *handle, const char *name, Filename *result)
{
- write_setting_s(handle, name, result.path);
+ write_setting_s(handle, name, result->path);
}
void close_settings_r(void *handle)
{
+ tree234 *tree = (tree234 *)handle;
+ struct skeyval *kv;
+
+ if (!tree)
+ return;
+
+ while ( (kv = index234(tree, 0)) != NULL) {
+ del234(tree, kv);
+ sfree((char *)kv->key);
+ sfree((char *)kv->value);
+ sfree(kv);
+ }
+
+ freetree234(tree);
}
void del_settings(const char *sessionname)
{
+ char *filename;
+ filename = make_filename(INDEX_SESSION, sessionname);
+ unlink(filename);
+ sfree(filename);
}
void *enum_settings_start(void)
{
- return NULL;
+ DIR *dp;
+ char *filename;
+
+ filename = make_filename(INDEX_SESSIONDIR, NULL);
+ dp = opendir(filename);
+ sfree(filename);
+
+ return dp;
}
char *enum_settings_next(void *handle, char *buffer, int buflen)
{
+ DIR *dp = (DIR *)handle;
+ struct dirent *de;
+ struct stat st;
+ char *fullpath;
+ int maxlen, thislen, len;
+ char *unmunged;
+
+ fullpath = make_filename(INDEX_SESSIONDIR, NULL);
+ maxlen = len = strlen(fullpath);
+
+ while ( (de = readdir(dp)) != NULL ) {
+ thislen = len + 1 + strlen(de->d_name);
+ if (maxlen < thislen) {
+ maxlen = thislen;
+ fullpath = sresize(fullpath, maxlen+1, char);
+ }
+ fullpath[len] = '/';
+ strncpy(fullpath+len+1, de->d_name, thislen - (len+1));
+ fullpath[thislen] = '\0';
+
+ if (stat(fullpath, &st) < 0 || !S_ISREG(st.st_mode))
+ continue; /* try another one */
+
+ unmunged = unmungestr(de->d_name);
+ strncpy(buffer, unmunged, buflen);
+ buffer[buflen-1] = '\0';
+ sfree(unmunged);
+ sfree(fullpath);
+ return buffer;
+ }
+
+ sfree(fullpath);
return NULL;
}
void enum_settings_finish(void *handle)
{
-}
-
-enum {
- INDEX_DIR, INDEX_HOSTKEYS, INDEX_RANDSEED
-};
-
-static void make_filename(char *filename, int index)
-{
- char *home;
- int len;
- home = getenv("HOME");
- strncpy(filename, home, FILENAME_MAX);
- len = strlen(filename);
- strncpy(filename + len,
- index == INDEX_DIR ? "/.putty" :
- index == INDEX_HOSTKEYS ? "/.putty/sshhostkeys" :
- index == INDEX_RANDSEED ? "/.putty/randomseed" :
- "/.putty/ERROR", FILENAME_MAX - len);
- filename[FILENAME_MAX-1] = '\0';
-}
-
-/*
- * Read an entire line of text from a file. Return a buffer
- * malloced to be as big as necessary (caller must free).
- */
-static char *fgetline(FILE *fp)
-{
- char *ret = smalloc(512);
- int size = 512, len = 0;
- while (fgets(ret + len, size - len, fp)) {
- len += strlen(ret + len);
- if (ret[len-1] == '\n')
- break; /* got a newline, we're done */
- size = len + 512;
- ret = srealloc(ret, size);
- }
- if (len == 0) { /* first fgets returned NULL */
- sfree(ret);
- return NULL;
- }
- ret[len] = '\0';
- return ret;
+ DIR *dp = (DIR *)handle;
+ closedir(dp);
}
/*
const char *keytype, const char *key)
{
FILE *fp;
- char filename[FILENAME_MAX];
+ char *filename;
char *line;
int ret;
- make_filename(filename, INDEX_HOSTKEYS);
+ filename = make_filename(INDEX_HOSTKEYS, NULL);
fp = fopen(filename, "r");
+ sfree(filename);
if (!fp)
return 1; /* key does not exist */
break;
}
+ fclose(fp);
return ret;
}
void store_host_key(const char *hostname, int port,
const char *keytype, const char *key)
{
- FILE *fp;
- int fd;
- char filename[FILENAME_MAX];
+ FILE *rfp, *wfp;
+ char *newtext, *line;
+ int headerlen;
+ char *filename, *tmpfilename;
- make_filename(filename, INDEX_HOSTKEYS);
- fd = open(filename, O_CREAT | O_APPEND | O_RDWR, 0600);
- if (fd < 0) {
- char dir[FILENAME_MAX];
+ /*
+ * Open both the old file and a new file.
+ */
+ tmpfilename = make_filename(INDEX_HOSTKEYS_TMP, NULL);
+ wfp = fopen(tmpfilename, "w");
+ if (!wfp) {
+ char *dir;
+
+ dir = make_filename(INDEX_DIR, NULL);
+ mkdir(dir, 0700);
+ sfree(dir);
- make_filename(dir, INDEX_DIR);
- mkdir(dir, 0700);
- fd = open(filename, O_CREAT | O_APPEND | O_RDWR, 0600);
+ wfp = fopen(tmpfilename, "w");
}
- if (fd < 0) {
- perror(filename);
- exit(1);
+ if (!wfp) {
+ sfree(tmpfilename);
+ return;
}
- fp = fdopen(fd, "a");
- fprintf(fp, "%s@%d:%s %s\n", keytype, port, hostname, key);
- fclose(fp);
+ filename = make_filename(INDEX_HOSTKEYS, NULL);
+ rfp = fopen(filename, "r");
+
+ newtext = dupprintf("%s@%d:%s %s\n", keytype, port, hostname, key);
+ headerlen = 1 + strcspn(newtext, " "); /* count the space too */
+
+ /*
+ * Copy all lines from the old file to the new one that _don't_
+ * involve the same host key identifier as the one we're adding.
+ */
+ if (rfp) {
+ while ( (line = fgetline(rfp)) ) {
+ if (strncmp(line, newtext, headerlen))
+ fputs(line, wfp);
+ sfree(line);
+ }
+ fclose(rfp);
+ }
+
+ /*
+ * Now add the new line at the end.
+ */
+ fputs(newtext, wfp);
+
+ fclose(wfp);
+
+ rename(tmpfilename, filename);
+
+ sfree(tmpfilename);
+ sfree(filename);
+ sfree(newtext);
}
void read_random_seed(noise_consumer_t consumer)
{
int fd;
- char fname[FILENAME_MAX];
+ char *fname;
- make_filename(fname, INDEX_RANDSEED);
+ fname = make_filename(INDEX_RANDSEED, NULL);
fd = open(fname, O_RDONLY);
- if (fd) {
+ sfree(fname);
+ if (fd >= 0) {
char buf[512];
int ret;
while ( (ret = read(fd, buf, sizeof(buf))) > 0)
void write_random_seed(void *data, int len)
{
int fd;
- char fname[FILENAME_MAX];
+ char *fname;
- make_filename(fname, INDEX_RANDSEED);
+ fname = make_filename(INDEX_RANDSEED, NULL);
/*
* Don't truncate the random seed file if it already exists; if
* something goes wrong half way through writing it, it would
*/
fd = open(fname, O_CREAT | O_WRONLY, 0600);
if (fd < 0) {
- char dir[FILENAME_MAX];
+ if (errno != ENOENT) {
+ char *msg = dupprintf("Unable to write random seed: open(\"%s\") "
+ "returned '%s'", fname, strerror(errno));
+ nonfatal(msg);
+ sfree(msg);
+ return;
+ }
+ char *dir;
+
+ dir = make_filename(INDEX_DIR, NULL);
+ if (mkdir(dir, 0700) < 0) {
+ char *msg = dupprintf("Unable to write random seed: mkdir(\"%s\") "
+ "returned '%s'", dir, strerror(errno));
+ nonfatal(msg);
+ sfree(msg);
+ sfree(dir);
+ return;
+ }
+ sfree(dir);
- make_filename(dir, INDEX_DIR);
- mkdir(dir, 0700);
fd = open(fname, O_CREAT | O_WRONLY, 0600);
+ if (errno != ENOENT) {
+ char *msg = dupprintf("Unable to write random seed: open(\"%s\") "
+ "returned '%s'", fname, strerror(errno));
+ nonfatal(msg);
+ sfree(msg);
+ return;
+ }
}
while (len > 0) {
int ret = write(fd, data, len);
- if (ret <= 0) break;
+ if (ret < 0) {
+ char *msg = dupprintf("Unable to write random seed: write "
+ "returned '%s'", strerror(errno));
+ nonfatal(msg);
+ sfree(msg);
+ break;
+ }
len -= ret;
data = (char *)data + len;
}
close(fd);
+ sfree(fname);
}
void cleanup_all(void)
~mdw / sgt / putty / blobdiff