In the showwal command-line tool, for unix builds, if the

auxiliary argument is of
the form "Ntruncate" where "N" is a frame number, then truncate the WAL
file after the N-th frame.

FossilOrigin-Name: 90015df30655d884ecf7ae61e588824696954252dc6b1a5f78cf2de8cb236104

diff --git a/manifest b/manifest
index 8bb03a4eb8149d67a8f5df503164dbccbb8f7656..7660e6380e8e48ecef2635bd8dc52bdd7ce44c3c 100644 (file)
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Add\sthe\sanycollseq.c\sloadable\sextension\sin\setc/misc
-D 2017-04-16T22:08:31.808
+C In\sthe\sshowwal\scommand-line\stool,\sfor\sunix\sbuilds,\sif\sthe\nauxiliary\sargument\sis\sof\nthe\sform\s"Ntruncate"\swhere\s"N"\sis\sa\sframe\snumber,\sthen\struncate\sthe\sWAL\nfile\safter\sthe\sN-th\sframe.
+D 2017-04-16T22:41:49.287
 F Makefile.in 1cc758ce3374a32425e4d130c2fe7b026b20de5b8843243de75f087c0a2661fb
 F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
 F Makefile.msc 6a8c838220f7c00820e1fc0ac1bccaaa8e5676067e1dbfa1bafa7a4ffecf8ae6
@@ -1530,7 +1530,7 @@ F tool/showdb.c e6bc9dba233bf1b57ca0a525a2bba762db4e223de84990739db3f09c46151b1e
 F tool/showjournal.c 5bad7ae8784a43d2b270d953060423b8bd480818
 F tool/showlocks.c 9920bcc64f58378ff1118caead34147201f48c68
 F tool/showstat4.c b14159aa062f661b394ba37b6b7b94bfb8012ab9
-F tool/showwal.c ec79959834f7b21f1e0a2aa52bb7c056d2203977
+F tool/showwal.c ad9d768f96ca6199ad3a8c9562d679680bd032dd01204ea3e5ea6fb931d81847
 F tool/soak1.tcl 8d407956e1a45b485a8e072470a3e629a27037fe
 F tool/spaceanal.tcl ab7d9bf68062907282a64b3e12ccbfad47193c5a
 F tool/speed-check.sh 9630ba0468b609c52f48309243d4eb6e9c34deda
@@ -1573,7 +1573,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 89f9e4363aa19f306e55f749c442eae2f8994f6a47c65e645a79b308b450d5e5
-R 7e7a9c3544574aec28a263899284e68c
+P d7b9813cb17615c3d00afd6994a4309d6d48c8e924b6cd813c543e1fa65c7719
+R 8c1cbe1045ee7677fda3e059322e3580
 U drh
-Z ee9d941ffe6bc63689ac0fdb0270a043
+Z aa5715d42d381110f91b49a6f98fcf69

diff --git a/manifest.uuid b/manifest.uuid
index 380e05116544f7c5104a5a18d99de565313d364d..14a8d9cd9bdc76cd10b1bd7fc823d56d3a335ba6 100644 (file)
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-d7b9813cb17615c3d00afd6994a4309d6d48c8e924b6cd813c543e1fa65c7719
\ No newline at end of file
+90015df30655d884ecf7ae61e588824696954252dc6b1a5f78cf2de8cb236104
\ No newline at end of file

diff --git a/tool/showwal.c b/tool/showwal.c
index 33cc21896b4e2a3c9b615b5e63953ae52e39d83b..b214a288ebc1ae9fd94f448adf5b58f774df9d31 100644 (file)
--- a/tool/showwal.c
+++ b/tool/showwal.c
@@ -12,6 +12,7 @@
 
 #if !defined(_MSC_VER)
 #include <unistd.h>
+#include <sys/types.h>
 #else
 #include <io.h>
 #endif
@@ -579,6 +580,14 @@ int main(int argc, char **argv){
         decode_btree_page(a, iStart, hdrSize, zLeft+1);
         free(a);
         continue;
+#if !defined(_MSC_VER)
+      }else if( zLeft && strcmp(zLeft,"truncate")==0 ){
+        /* Frame number followed by "truncate" truncates the WAL file
+        ** after that frame */
+        off_t newSize = 32 + iStart*(pagesize+24);
+        truncate(argv[1], newSize);
+        continue;
+#endif
       }else{
         iEnd = iStart;
       }