1 From 0f70ba9d3412b17ac4e08e33e1be3c226c06ea54 Mon Sep 17 00:00:00 2001
2 From: Yan Li <yan.i.li@intel.com>
3 Date: Tue, 12 May 2009 17:49:07 +0800
4 Subject: [PATCH] XKB: cache xkbcomp output for fast start-up v5 for 1.6.1
7 xkbcomp outputs will be cached in files with hashed keymap as
8 names. This saves boot time for around 1s on commodity netbooks.
10 Signed-off-by: Yan Li <yan.i.li@intel.com>
13 xkb/README.compiled | 8 +-
14 xkb/ddxLoad.c | 192 +++++++++++++++++++++++++++++++++++++++++---------
15 3 files changed, 164 insertions(+), 42 deletions(-)
17 diff --git a/configure.ac b/configure.ac
18 index 4c4c797..7a5020a 100644
21 @@ -476,9 +476,9 @@ AC_ARG_WITH(default-font-path, AS_HELP_STRING([--with-default-font-path=PATH], [
22 AC_ARG_WITH(xkb-path, AS_HELP_STRING([--with-xkb-path=PATH], [Path to XKB base dir (default: ${datadir}/X11/xkb)]),
23 [ XKBPATH="$withval" ],
24 [ XKBPATH="${datadir}/X11/xkb" ])
25 -AC_ARG_WITH(xkb-output, AS_HELP_STRING([--with-xkb-output=PATH], [Path to XKB output dir (default: ${datadir}/X11/xkb/compiled)]),
26 +AC_ARG_WITH(xkb-output, AS_HELP_STRING([--with-xkb-output=PATH], [Path to XKB output dir (default: ${localstatedir}/cache/xkb)]),
27 [ XKBOUTPUT="$withval" ],
28 - [ XKBOUTPUT="compiled" ])
29 + [ XKBOUTPUT="${localstatedir}/cache/xkb" ])
30 AC_ARG_WITH(serverconfig-path, AS_HELP_STRING([--with-serverconfig-path=PATH],
31 [Directory where ancillary server config files are installed (default: ${libdir}/xorg)]),
32 [ SERVERCONFIG="$withval" ],
33 @@ -1757,7 +1757,7 @@ AC_DEFINE_DIR(XKB_BIN_DIRECTORY, bindir, [Path to XKB bin dir])
34 XKBOUTPUT_FIRSTCHAR=`echo $XKBOUTPUT | cut -b 1`
36 if [[ x$XKBOUTPUT_FIRSTCHAR != x/ ]] ; then
37 - XKBOUTPUT="$XKB_BASE_DIRECTORY/$XKBOUTPUT"
38 + AC_MSG_ERROR([xkb-output must be an absolute path.])
41 # XKM_OUTPUT_DIR (used in code) must end in / or file names get hosed
42 diff --git a/xkb/README.compiled b/xkb/README.compiled
43 index 71caa2f..a4a2ae0 100644
44 --- a/xkb/README.compiled
45 +++ b/xkb/README.compiled
46 @@ -4,10 +4,10 @@ current keymap and/or any scratch keymaps used by clients. The X server
47 or some other tool might destroy or replace the files in this directory,
48 so it is not a safe place to store compiled keymaps for long periods of
49 time. The default keymap for any server is usually stored in:
51 -where <num> is the display number of the server in question, which makes
52 -it possible for several servers *on the same host* to share the same
56 +where <SHA1> is the SHA1 hash of keymap source, so that compiled
57 +keymap of different keymap sources are stored in different files.
59 Unless the X server is modified, sharing this directory between servers on
60 different hosts could cause problems.
61 diff --git a/xkb/ddxLoad.c b/xkb/ddxLoad.c
62 index 4d5dfb6..60a68af 100644
65 @@ -32,6 +32,12 @@ THE USE OR PERFORMANCE OF THIS SOFTWARE.
66 #include <xkb-config.h>
69 +#ifdef HAVE_SHA1_IN_LIBMD /* Use libmd for SHA1 */
71 +#else /* Use OpenSSL's libcrypto */
72 +# include <stddef.h> /* buggy openssl/sha.h wants size_t */
73 +# include <openssl/sha.h>
78 @@ -46,24 +52,13 @@ THE USE OR PERFORMANCE OF THIS SOFTWARE.
79 #define XKBSRV_NEED_FILE_FUNCS
81 #include <X11/extensions/XI.h>
85 #if defined(CSRG_BASED) || defined(linux) || defined(__GNU__)
90 - * If XKM_OUTPUT_DIR specifies a path without a leading slash, it is
91 - * relative to the top-level XKB configuration directory.
92 - * Making the server write to a subdirectory of that directory
93 - * requires some work in the general case (install procedure
94 - * has to create links to /var or somesuch on many machines),
95 - * so we just compile into /usr/tmp for now.
97 -#ifndef XKM_OUTPUT_DIR
98 -#define XKM_OUTPUT_DIR "compiled/"
101 #define PRE_ERROR_MSG "\"The XKEYBOARD keymap compiler (xkbcomp) reports:\""
102 #define ERROR_PREFIX "\"> \""
103 #define POST_ERROR_MSG1 "\"Errors from xkbcomp are not fatal to the X server\""
104 @@ -179,6 +174,45 @@ OutputDirectory(
108 +Sha1Asc(char sha1Asc[SHA_DIGEST_LENGTH*2+1], const char * input)
111 + unsigned char sha1[SHA_DIGEST_LENGTH];
113 +#ifdef HAVE_SHA1_IN_LIBMD /* Use libmd for SHA1 */
117 + SHA1Update (&ctx, input, strlen(input));
118 + SHA1Final (sha1, &ctx);
119 +#else /* Use OpenSSL's libcrypto */
123 + success = SHA1_Init (&ctx);
127 + success = SHA1_Update (&ctx, input, strlen(input));
131 + success = SHA1_Final (sha1, &ctx);
136 + /* convert sha1 to sha1_asc */
137 + for(i=0; i<SHA_DIGEST_LENGTH; ++i) {
138 + sprintf(sha1Asc+i*2, "%02X", sha1[i]);
144 +/* call xkbcomp and compile XKB keymap, return xkm file name in
147 XkbDDXCompileKeymapByNames( XkbDescPtr xkb,
148 XkbComponentNamesPtr names,
150 @@ -187,7 +221,11 @@ XkbDDXCompileKeymapByNames( XkbDescPtr xkb,
154 - char *buf = NULL, keymap[PATH_MAX], xkm_output_dir[PATH_MAX];
155 + char * buf = NULL, xkmfile[PATH_MAX], xkm_output_dir[PATH_MAX];
156 + char * tmpXkmFile = NULL;
157 + char * canonicalXkmFileName = NULL;
158 + char sha1Asc[SHA_DIGEST_LENGTH*2+1], xkbKeyMapBuf[100*1024];
161 const char *emptystring = "";
162 const char *xkbbasedirflag = emptystring;
163 @@ -198,16 +236,70 @@ XkbDDXCompileKeymapByNames( XkbDescPtr xkb,
164 /* WIN32 has no popen. The input must be stored in a file which is
165 used as input for xkbcomp. xkbcomp does not read from stdin. */
166 char tmpname[PATH_MAX];
167 - const char *xkmfile = tmpname;
168 + const char *xkbfile = tmpname;
170 - const char *xkmfile = "-";
171 + const char *xkbfile = "-";
174 - snprintf(keymap, sizeof(keymap), "server-%s", display);
175 + /* Write keymap source (xkbfile) to memory buffer `xkbKeyMapBuf',
176 + of which SHA1 is generated and used as result xkm file name */
177 + memset(xkbKeyMapBuf, 0, sizeof(xkbKeyMapBuf));
178 + out = fmemopen(xkbKeyMapBuf, sizeof(xkbKeyMapBuf), "w");
180 + ErrorF("[xkb] Open xkbKeyMapBuf for writing failed\n");
183 + ret = XkbWriteXKBKeymapForNames(out, names, xkb, want, need);
184 + if (fclose(out) !=0)
186 + ErrorF("[xkb] XkbWriteXKBKeymapForNames error, perhaps xkbKeyMapBuf is too small\n");
190 + if (xkbDebugFlags) {
191 + ErrorF("[xkb] XkbDDXCompileKeymapByNames compiling keymap:\n");
192 + fputs(xkbKeyMapBuf, stderr);
196 + ErrorF("[xkb] Generating XKB Keymap failed, giving up compiling keymap\n");
200 + DebugF("[xkb] computing SHA1 of keymap\n");
201 + if (Success == Sha1Asc(sha1Asc, xkbKeyMapBuf)) {
202 + snprintf(xkmfile, sizeof(xkmfile), "server-%s", sha1Asc);
205 + ErrorF("[xkb] Computing SHA1 of keymap failed, "
206 + "using display name instead as xkm file name\n");
207 + snprintf(xkmfile, sizeof(xkmfile), "server-%s", display);
210 - XkbEnsureSafeMapName(keymap);
211 + XkbEnsureSafeMapName(xkmfile);
212 OutputDirectory(xkm_output_dir, sizeof(xkm_output_dir));
214 + /* set nameRtrn, fail if it's too small */
215 + if ((strlen(xkmfile)+1 > nameRtrnLen) && nameRtrn) {
216 + ErrorF("[xkb] nameRtrn too small to hold xkmfile name\n");
219 + strncpy(nameRtrn, xkmfile, nameRtrnLen);
221 + /* if the xkm file already exists, reuse it */
222 + canonicalXkmFileName = Xprintf("%s%s.xkm", xkm_output_dir, xkmfile);
223 + if (access(canonicalXkmFileName, R_OK) == 0) {
224 + /* yes, we can reuse the old xkm file */
225 + LogMessage(X_INFO, "XKB: reuse xkmfile %s\n", canonicalXkmFileName);
229 + LogMessage(X_INFO, "XKB: generating xkmfile %s\n", canonicalXkmFileName);
231 + /* continue to call xkbcomp to compile the keymap. to avoid race
232 + condition, we compile it to a tmpfile then rename it to
236 strcpy(tmpname, Win32TempDir());
237 strcat(tmpname, "\\xkb_XXXXXX");
238 @@ -230,19 +322,30 @@ XkbDDXCompileKeymapByNames( XkbDescPtr xkb,
242 + if ( (tmpXkmFile = tempnam(xkm_output_dir, NULL)) == NULL ) {
243 + ErrorF("[xkb] Can't generate temp xkm file name");
248 buf = Xprintf("\"%s%sxkbcomp\" -w %d %s -xkm \"%s\" "
249 - "-em1 %s -emp %s -eml %s \"%s%s.xkm\"",
250 + "-em1 %s -emp %s -eml %s \"%s\"",
251 xkbbindir, xkbbindirsep,
252 ( (xkbDebugFlags < 2) ? 1 :
253 ((xkbDebugFlags > 10) ? 10 : (int)xkbDebugFlags) ),
254 - xkbbasedirflag, xkmfile,
255 + xkbbasedirflag, xkbfile,
256 PRE_ERROR_MSG, ERROR_PREFIX, POST_ERROR_MSG1,
257 - xkm_output_dir, keymap);
260 if (xkbbasedirflag != emptystring) {
261 xfree(xkbbasedirflag);
264 + /* there's a potential race condition between calling tempnam()
265 + and invoking xkbcomp to write the result file (potential temp
266 + file name conflicts), but since xkbcomp is a standalone
267 + program, we have to live with this */
272 @@ -250,31 +353,43 @@ XkbDDXCompileKeymapByNames( XkbDescPtr xkb,
277 - if (xkbDebugFlags) {
278 - ErrorF("[xkb] XkbDDXCompileKeymapByNames compiling keymap:\n");
279 - XkbWriteXKBKeymapForNames(stderr,names,xkb,want,need);
280 + /* write XKBKeyMapBuf to xkbcomp */
281 + if (EOF==fputs(xkbKeyMapBuf, out))
283 + ErrorF("[xkb] Sending keymap to xkbcomp failed\n");
288 - XkbWriteXKBKeymapForNames(out,names,xkb,want,need);
292 if (fclose(out)==0 && System(buf) >= 0)
295 + /* xkbcomp success */
297 DebugF("[xkb] xkb executes: %s\n",buf);
299 - strncpy(nameRtrn,keymap,nameRtrnLen);
300 - nameRtrn[nameRtrnLen-1]= '\0';
302 + /* if canonicalXkmFileName already exists now, we simply
303 + overwrite it, this is OK */
304 + ret = rename(tmpXkmFile, canonicalXkmFileName);
306 + ErrorF("[xkb] Can't rename %s to %s, error: %s\n",
307 + tmpXkmFile, canonicalXkmFileName,
310 + /* in case of error, don't unlink tmpXkmFile, leave it
324 - LogMessage(X_ERROR, "Error compiling keymap (%s)\n", keymap);
325 + LogMessage(X_ERROR, "Error compiling keymap (%s)\n", xkbfile);
327 /* remove the temporary file */
329 @@ -289,9 +404,17 @@ XkbDDXCompileKeymapByNames( XkbDescPtr xkb,
338 + if (canonicalXkmFileName)
339 + xfree(canonicalXkmFileName);
348 @@ -375,7 +498,6 @@ unsigned missing;
349 DebugF("Loaded XKB keymap %s, defined=0x%x\n",fileName,(*xkbRtrn)->defined);
352 - (void) unlink (fileName);
353 return (need|want)&(~missing);