patch_alarm

Patch alarm() to isnan().

How to use?

$ cat test.c && make test
#include <unistd.h>
main() {
    alarm(0);
}
cc     test.c   -o test

$ patch_alarm ./test
Done.

$ patch_alarm ./test.patch
No "alarm" found.

$ ltrace ./test.patch
__libc_start_main(0x40052d, 1, 0x7ffe3ca9a1b8, 0x400540 <unfinished ...>
isnan(0, 0x7ffe3ca9a1b8, 0x7ffe3ca9a1c8, 0)                                                      = 0
+++ exited (status 0) +++