VNC is a very usefull tool, and if you do not know it please read about it on http://www.realvnc.com or on http://www.tightvnc.com/. But what I sometimes would like to have is a tool which can take screendumps directly, and this is exactly what vncsnapshot can do.
Here I will give the steps to create .rpm for it.
[casper@localhost casper]$ su - password: [root@localhost root]$ yum install zlib-devel .... [root@localhost root]$ yum install libjpeg-devel ....This will also install libjpeg and zlib which are needed for the installation.
[casper@localhost casper]$ cd rpmbuild/SPECS [casper@localhost SPECS]$ rpmbuild -ba vncsnapshot.spec Executing(%prep): /bin/sh -e /home/casper/rpmbuild/TMP/rpm-tmp.96950 + umask 022 + cd /home/casper/rpmbuild//BUILD + LANG=C + export LANG + unset DISPLAY + mkdir -p /home/casper/rpmbuild/TMP/vncsnapshot-1.2a-1.fdr-root-casper/usr/bin + mkdir -p /home/casper/rpmbuild/TMP/vncsnapshot-1.2a-1.fdr-root-casper/usr/shar e/man/man1 + cd /home/casper/rpmbuild/BUILD + rm -rf vncsnapshot-1.2a + /usr/bin/gzip -dc /home/casper/rpmbuild/SOURCES/vncsnapshot-1.2a-src.tar.gz + tar -xf - + STATUS=0 + '[' 0 -ne 0 ']' + cd vncsnapshot-1.2a ++ /usr/bin/id -u + '[' 1002 = 0 ']' ++ /usr/bin/id -u + '[' 1002 = 0 ']' + /bin/chmod -Rf a+rX,u+w,g-w,o-w . + exit 0 Executing(%build): /bin/sh -e /home/casper/rpmbuild/TMP/rpm-tmp.63800 + umask 022 + cd /home/casper/rpmbuild//BUILD + cd vncsnapshot-1.2a + LANG=C + export LANG + unset DISPLAY + make cd rdr;make all make[1]: Entering directory `/home/casper/rpmbuild/BUILD/vncsnapshot-1.2a/rdr' g++ -I. -I.. -c -o FdInStream.o FdInStream.cxx echo FdInStream.o FdInStream.cxx FdInStream.o FdInStream.cxx g++ -I. -I.. -c -o InStream.o InStream.cxx echo InStream.o InStream.cxx InStream.o InStream.cxx g++ -I. -I.. -c -o ZlibInStream.o ZlibInStream.cxx echo ZlibInStream.o ZlibInStream.cxx ZlibInStream.o ZlibInStream.cxx g++ -I. -I.. -c -o FdOutStream.o FdOutStream.cxx echo FdOutStream.o FdOutStream.cxx FdOutStream.o FdOutStream.cxx g++ -I. -I.. -c -o NullOutStream.o NullOutStream.cxx echo NullOutStream.o NullOutStream.cxx NullOutStream.o NullOutStream.cxx g++ -I. -I.. -c -o ZlibOutStream.o ZlibOutStream.cxx echo ZlibOutStream.o ZlibOutStream.cxx ZlibOutStream.o ZlibOutStream.cxx ar cr librdr.a FdInStream.o InStream.o ZlibInStream.o FdOutStream.o NullOutStream.o ZlibOutStream.o ranlib librdr.a make[1]: Leaving directory `/home/casper/rpmbuild/BUILD/vncsnapshot-1.2a/rdr' gcc -O2 -Wall -I. -I/usr/local/include -I/usr/local/include -c -o argsresourc es.o argsresources.c argsresources.c:23: warning: `ID' defined but not used gcc -O2 -Wall -I. -I/usr/local/include -I/usr/local/include -c -o buffer.o bu ffer.c buffer.c:23: warning: `ID' defined but not used gcc -O2 -Wall -I. -I/usr/local/include -I/usr/local/include -c -o cursor.o cu rsor.c cursor.c:24: warning: `ID' defined but not used gcc -O2 -Wall -I. -I/usr/local/include -I/usr/local/include -c -o listen.o li sten.c listen.c:23: warning: `ID' defined but not used gcc -O2 -Wall -I. -I/usr/local/include -I/usr/local/include -c -o rfbproto.o rfbproto.c In file included from rfbproto.c:762: protocols/tight.c: In function `FilterGradient32': protocols/tight.c:428: warning: suggest parentheses around + or - in operand of & protocols/tight.c:442: warning: suggest parentheses around + or - in operand of & rfbproto.c: At top level: rfbproto.c:26: warning: `ID' defined but not used g++ -O2 -Wall -I. -I/usr/local/include -I/usr/local/include -c -o sockets.o s ockets.cxx sockets.cxx:24: warning: `const char*ID' defined but not used gcc -O2 -Wall -I. -I/usr/local/include -I/usr/local/include -c -o tunnel.o tu nnel.c tunnel.c:24: warning: `ID' defined but not used gcc -O2 -Wall -I. -I/usr/local/include -I/usr/local/include -c -o vncsnapshot .o vncsnapshot.c vncsnapshot.c:23: warning: `ID' defined but not used gcc -O2 -Wall -I. -I/usr/local/include -I/usr/local/include -c -o d3des.o d3d es.c gcc -O2 -Wall -I. -I/usr/local/include -I/usr/local/include -c -o vncauth.o v ncauth.c vncauth.c:30: warning: `ID' defined but not used g++ -O2 -Wall -I. -I/usr/local/include -I/usr/local/include -c -o zrle.o zrle .cxx g++ -O2 -Wall -I. -I/usr/local/include -I/usr/local/include -O2 -Wall -o vnc snapshot argsresources.o buffer.o cursor.o listen.o rfbproto.o sockets.o tunnel. o vncsnapshot.o d3des.o vncauth.o zrle.o rdr/librdr.a -L/usr/local/lib -lz -L/u sr/local/lib -ljpeg gcc -O2 -Wall -I. -I/usr/local/include -I/usr/local/include -c -o vncpasswd.o vncpasswd.c gcc -O2 -Wall -I. -I/usr/local/include -I/usr/local/include -O2 -Wall -o vnc passwd vncpasswd.o vncauth.o d3des.o + exit 0 Executing(%install): /bin/sh -e /home/casper/rpmbuild/TMP/rpm-tmp.30877 + umask 022 + cd /home/casper/rpmbuild//BUILD + cd vncsnapshot-1.2a + LANG=C + export LANG + unset DISPLAY + cp -ar vncsnapshot /home/casper/rpmbuild/TMP/vncsnapshot-1.2a-1.fdr-root-caspe r/usr/bin + cp -ar vncpasswd /home/casper/rpmbuild/TMP/vncsnapshot-1.2a-1.fdr-root-casper/ usr/bin/vncpassword-vncsnapshot + cat vncsnapshot.man1 + gzip -c + /usr/lib/rpm/find-debuginfo.sh /home/casper/rpmbuild//BUILD/vncsnapshot-1.2a extracting debug info from /home/casper/rpmbuild/TMP/vncsnapshot-1.2a-1.fdr-root -casper/usr/bin/vncsnapshot extracting debug info from /home/casper/rpmbuild/TMP/vncsnapshot-1.2a-1.fdr-root -casper/usr/bin/vncpassword-vncsnapshot 0 blocks + /usr/lib/rpm/redhat/brp-compress + /usr/lib/rpm/redhat/brp-strip /usr/bin/strip + /usr/lib/rpm/redhat/brp-strip-static-archive /usr/bin/strip + /usr/lib/rpm/redhat/brp-strip-comment-note /usr/bin/strip /usr/bin/objdump Processing files: vncsnapshot-1.2a-1.fdr Executing(%doc): /bin/sh -e /home/casper/rpmbuild/TMP/rpm-tmp.30877 + umask 022 + cd /home/casper/rpmbuild//BUILD + cd vncsnapshot-1.2a + DOCDIR=/home/casper/rpmbuild/TMP/vncsnapshot-1.2a-1.fdr-root-casper/usr/share/ doc/vncsnapshot-1.2a + export DOCDIR + rm -rf /home/casper/rpmbuild/TMP/vncsnapshot-1.2a-1.fdr-root-casper/usr/share/ doc/vncsnapshot-1.2a + /bin/mkdir -p /home/casper/rpmbuild/TMP/vncsnapshot-1.2a-1.fdr-root-casper/usr /share/doc/vncsnapshot-1.2a + cp -pr BUILD BUILD.unix BUILD.win32 CHANGE-LOG.txt MANIFEST README RELEASE-NOT ES-1.1.txt RELEASE-NOTES.txt web-page.html /home/casper/rpmbuild/TMP/vncsnapshot -1.2a-1.fdr-root-casper/usr/share/doc/vncsnapshot-1.2a + exit 0 Requires(interp): /bin/sh /bin/sh Requires(rpmlib): rpmlib(CompressedFileNames) <= 3.0.4-1 rpmlib(PayloadFilesHave Prefix) <= 4.0-1 Requires(preun): /bin/sh Requires(postun): /bin/sh Requires: libc.so.6 libc.so.6(GLIBC_2.0) libc.so.6(GLIBC_2.1) libc.so.6(GLIBC_2. 1.3) libc.so.6(GLIBC_2.3) libgcc_s.so.1 libgcc_s.so.1(GCC_3.0) libjpeg libjpeg.s o.62 libm.so.6 libstdc++.so.5 libstdc++.so.5(CXXABI_1.2) libstdc++.so.5(GLIBCPP_ 3.2) libz.so.1 zlib >= 1.2 Processing files: vncsnapshot-debuginfo-1.2a-1.fdr Requires(rpmlib): rpmlib(CompressedFileNames) <= 3.0.4-1 rpmlib(PayloadFilesHave Prefix) <= 4.0-1 Checking for unpackaged file(s): /usr/lib/rpm/check-files /home/casper/rpmbuild/ TMP/vncsnapshot-1.2a-1.fdr-root-casper Wrote: /home/casper/rpmbuild/SRPMS/vncsnapshot-1.2a-1.fdr.src.rpm Wrote: /home/casper/rpmbuild/RPMS/i386/vncsnapshot-1.2a-1.fdr.i386.rpm Wrote: /home/casper/rpmbuild/RPMS/i386/vncsnapshot-debuginfo-1.2a-1.fdr.i386.rpm Executing(%clean): /bin/sh -e /home/casper/rpmbuild/TMP/rpm-tmp.50512 + umask 022 + cd /home/casper/rpmbuild//BUILD + cd vncsnapshot-1.2a + rm -rf /home/casper/rpmbuild/TMP/vncsnapshot-1.2a-1.fdr-root-casper + exit 0 [casper@localhost SPECS]$
[casper@localhost SPECS]$ su Password: [root@localhost SPECS]# rpm -ivh ../RPMS/i386/vncsnapshot-1.2a-1.fdr.i386.rpm Preparing... ########################################### [100%] 1:vncsnapshot ########################################### [100%] [root@localhost SPECS]#
[casper@localhost casper]$ vncsnapshot -quality 50 -compresslevel 9 linux:0 test.jpg VNC server supports protocol version 3.7 (viewer 3.3) Password: VNC authentication succeeded Desktop name "LibVNCServer" Connected to VNC server, using protocol version 3.3 VNC server default format: 16 bits per pixel. Least significant byte first in each pixel. True colour: max red 31 green 63 blue 31, shift red 11 green 5 blue 0 32 bits per pixel. Least significant byte first in each pixel. True colour: max red 255 green 255 blue 255, shift red 0 green 8 blue 16 Image saved from (local host) 1280x1024 screen to test.jpg using 1280x1024+0+0 rectangle [casper@localhost casper]$
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