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texlive-bin: add patch to disable the fd sanitizer in pdftex

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Fixes https://github.com/termux/science-packages/issues/50.
With this we can generate the pdflatex format file, and compile tex
files with pdflatex. There might very well be other formats/engines that
still trigger the sanitizer.
This commit is contained in:
Henrik Grimler 2021-06-25 13:45:54 +02:00
parent d3d202979a
commit d1199c038a
1 changed files with 33 additions and 0 deletions
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33
packages/texlive-bin/disable-fdsan.patch Normal file
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@ -0,0 +1,33 @@
--- ./texk/web2c/texmfmp.h.orig 2021-06-25 11:32:31.312905780 +0000
+++ ./texk/web2c/texmfmp.h 2021-06-25 11:32:52.192921107 +0000
@@ -266,11 +266,28 @@
#define bopenout(f) open_output (&(f), FOPEN_WBIN_MODE)
#define bclose aclose
#ifdef FMT_COMPRESS
+
+#include <android/fdsan.h>
+#include <dlfcn.h>
+
+/* termux hack to disable file descriptor sanitizer */
+static int disable_fdsan() {
+ void *lib_handle = dlopen("libc.so", RTLD_LAZY);
+ if (lib_handle) {
+ void (*set_fdsan_error_level)(enum android_fdsan_error_level newlevel) = dlsym(lib_handle, "android_fdsan_set_error_level");
+ if (set_fdsan_error_level) {
+ set_fdsan_error_level(ANDROID_FDSAN_ERROR_LEVEL_DISABLED);
+ }
+ dlclose(lib_handle);
+ }
+ return 1;
+}
+
/* f is declared as gzFile, but we temporarily use it for a FILE *
so that we can use the standard open calls */
-#define wopenin(f) (open_input ((FILE**)&(f), DUMP_FORMAT, FOPEN_RBIN_MODE) \
+#define wopenin(f) (disable_fdsan() && open_input ((FILE**)&(f), DUMP_FORMAT, FOPEN_RBIN_MODE) \
&& (f = gzdopen(fileno((FILE*)f), FOPEN_RBIN_MODE)))
-#define wopenout(f) (open_output ((FILE**)&(f), FOPEN_WBIN_MODE) \
+#define wopenout(f) (disable_fdsan() && open_output ((FILE**)&(f), FOPEN_WBIN_MODE) \
&& (f = gzdopen(fileno((FILE*)f), FOPEN_WBIN_MODE)) \
&& (gzsetparams(f, 1, Z_DEFAULT_STRATEGY) == Z_OK))
#define wclose(f) gzclose(f)