Sat Feb 21 12:13:15 CET 2009 tobias@rautenkranz.ch

tagged 2.0

Sat Feb 21 12:08:59 CET 2009 tobias@rautenkranz.ch

* create meminfo in memory

--- old-myth2/Makefile 2014-10-30 08:04:44.000000000 +0100

+++ new-myth2/Makefile 1970-01-01 01:00:00.000000000 +0100

@@ -1,23 +0,0 @@

-all: fopenr.so

-

-fopenr.so: fopenRedirect.o

- $(CC) -shared -ldl -o fopenr.so fopenRedirect.o

-

-fopenRedirect.o: fopenRedirect.c

- $(CC) -Wall -fpic -c fopenRedirect.c

-

-## testing

-tests/fopen-cat: tests/fopen_cat.o

- $(CC) -o $@ $<

-

-.PHONY: test

-test: fopenr.so tests/fopen-cat

- @LD_PRELOAD=./fopenr.so ./tests/fopen-cat 2 "/proc/meminfo" \

- | awk '/Mem:/ { print $$2 }' | cmp tests/mem

-

-## clean

-.PHONY: clean

-clean:

- rm -f -- *.o

- rm -f -- *.so

- rm -f -- test/*.o test/fopen-cat

--- old-myth2/README 2014-10-30 08:04:44.000000000 +0100

+++ new-myth2/README 1970-01-01 01:00:00.000000000 +0100

@@ -1,17 +0,0 @@

-Myth2 for Linux parses /proc/meminfo,

-but its format changed some time ago.

-Therefore it won't activate OpenGL.

-

-Error message:

-~$ myth2

-Warning: You may not have enough free memory (-811245713) !

-

-By suppling an old meminfo this can be fixed:

-

-* Compile with: make

-* Start myth2: LD_PRELOAD=./fopenr.so myth2

-

-Changelog:

- 21.2.2009: Release 0.2 (thanks to Alan Swanson)

- * link to ld library

- * create meminfo dynamically

--- old-myth2/fopenRedirect.c 2014-10-30 08:04:44.000000000 +0100

+++ new-myth2/fopenRedirect.c 1970-01-01 01:00:00.000000000 +0100

@@ -1,84 +0,0 @@

-/*

- * Copyright (c) 2004, 2009 Tobias Rautenkranz <tobias@rautenkranz.ch>

- *

- * Permission is hereby granted, free of charge, to any person

- * obtaining a copy of this software and associated documentation

- * files (the "Software"), to deal in the Software without

- * restriction, including without limitation the rights to use,

- * copy, modify, merge, publish, distribute, sublicense, and/or sell

- * copies of the Software, and to permit persons to whom the

- * Software is furnished to do so, subject to the following

- * conditions:

- *

- * The above copyright notice and this permission notice shall be

- * included in all copies or substantial portions of the Software.

- *

- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES

- * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT

- * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,

- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR

- * OTHER DEALINGS IN THE SOFTWARE.

- */

-

-#include <stdio.h>

-

-#define __USE_GNU

-#include <string.h>

-#include <stdlib.h>

-#include <stdio.h>

-#include <unistd.h>

-#include <dlfcn.h>

-

-/* Old meminfo emulating 256Mb */

-static const char meminfo_str[] =

-"root: total: used: free: shared: buffers: cached:\n"

-"Mem: 268435456 0 268435456 0 0 0\n"

-"Swap: 268435456 0 268435456\n";

-

-int tmp_meminfo = -1;

-

-/** Returns a stream to an meminfo file. */

-FILE*

-make_meminfo()

-{

- FILE* tmp_meminfo = tmpfile();

-

- if (!tmp_meminfo)

- {

- perror("myth-meminfo: creating temponary meminfo");

- return NULL;

- }

-

- size_t len = fwrite(meminfo_str, 1, sizeof(meminfo_str), tmp_meminfo);

- if (len != sizeof(meminfo_str))

- {

- perror("myth-meminfo: writing temporary meminfo");

- return NULL;

- }

-

- rewind(tmp_meminfo);

-

- return tmp_meminfo;

-}

-

-FILE* fopen(const char *filename, const char *mode)

-{

- FILE* (*_fopen)(const char*,const char*) = dlsym(RTLD_NEXT, "fopen");

- if (!_fopen)

- {

- fprintf(stderr, "myth-meminfo: dlsym: %s\n", dlerror());

- return NULL;

- }

-

- if (strcmp(filename, "/proc/meminfo") == 0)

- {

- fprintf(stderr, "myth-meminfo: fixing /proc/meminfo\n");

-

- return make_meminfo();

- }

- else

- return _fopen(filename, mode);

-}

--- old-myth2/tests/fopen_cat.c 2014-10-30 08:04:44.000000000 +0100

+++ new-myth2/tests/fopen_cat.c 1970-01-01 01:00:00.000000000 +0100

@@ -1,59 +0,0 @@

-/*

- * Copyright (c) 2009 Tobias Rautenkranz <tobias@rautenkranz.ch>

- *

- * Permission is hereby granted, free of charge, to any person

- * obtaining a copy of this software and associated documentation

- * files (the "Software"), to deal in the Software without

- * restriction, including without limitation the rights to use,

- * copy, modify, merge, publish, distribute, sublicense, and/or sell

- * copies of the Software, and to permit persons to whom the

- * Software is furnished to do so, subject to the following

- * conditions:

- *

- * The above copyright notice and this permission notice shall be

- * included in all copies or substantial portions of the Software.

- *

- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES

- * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT

- * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,

- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR

- * OTHER DEALINGS IN THE SOFTWARE.

- */

-

-#include <stdio.h>

-#include <stdlib.h>

-#include <error.h>

-#include <errno.h>

-

-int

-main(int argc, char* argv[])

-{

- if (argc != 3)

- error(EXIT_FAILURE, errno, "usage: %s TIMES FILENAME", argv[0]);

-

- int count = atoi(argv[1]);

- const char* filename = argv[2];

-

- int i;

- for(i=0; i < count; i++)

- {

- FILE* file = fopen(filename, "r");

- if (!file)

- error(EXIT_FAILURE, errno, "open %s", filename);

-

- char buffer[100];

- size_t len;

- do {

- len = fread(buffer, 1, sizeof(buffer), file);

- size_t write_len = fwrite(buffer, 1, len, stdout);

-

- if (write_len != len)

- error(EXIT_FAILURE, 0, "write to stdout");

- } while (sizeof(buffer) == len || !feof(file));

- }

-

- return EXIT_SUCCESS;

-}

--- old-myth2/tests/mem 2014-10-30 08:04:44.000000000 +0100

+++ new-myth2/tests/mem 1970-01-01 01:00:00.000000000 +0100

@@ -1,2 +0,0 @@

-268435456

-268435456