help wanted
Repository metrics
- Stars
- (27,361 stars)
- PR merge metrics
- (Avg merge 19d 10h) (147 merged PRs in 30d)
Description
The following test code runs perfectly fine when compiled with clang and ran, but when ran with emscripten the ftruncate operation throws a Permission error instead of going through as expected.
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/stat.h>
int main() {
int fd = 0;
char filename[] = "XXXXXX";
// Test
assert((fd = mkstemp(filename)) >= 0);
assert(chmod(filename, 0) >= 0);
assert(ftruncate(fd, 69) >= 0);
// Cleanup
assert(close(fd) >= 0);
assert(remove(filename) >= 0);
printf("ok\n");
return 0;
}
Ran with
clang main.c -o testfs && ./testfsemcc main.c -s ENVIRONMENT=node -s MAIN_MODULE -o out.js && node out.js
Current behavior
Clang build prints ok, emcc build fails (assertion error at ftruncate)
Expected behavior
Both should print "ok"
Environment
OS: Arch Linux clang version 12.0.1 emscripten version 2.0.26 (with clang 13.0.0) node version 16.4.2