test: add wasi test for freopen()

This test provides missing coverage for __wasi_fd_renumber(). PR-URL: #31432 Reviewed-By: Tobias Nießen <[email protected]> Reviewed-By: Ben Noordhuis <[email protected]> Reviewed-By: David Carlier <[email protected]> Reviewed-By: Rich Trott <[email protected]> Reviewed-By: Jiawen Geng <[email protected]>

Author: cjihrig

test/fixtures/wasi/input2.txt

@@ -0,0 +1 @@
+hello from input2.txt

test/wasi/c/freopen.c

@@ -0,0 +1,16 @@
+#include<assert.h>
+#include<stdio.h>
+
+intmain(){
+FILE*file_orig=fopen("/sandbox/input.txt", "r");
+assert(file_orig!=NULL);
+FILE*file_new=freopen("/sandbox/input2.txt", "r", file_orig);
+assert(file_new!=NULL);
+
+intc=fgetc(file_new);
+while (c!=EOF){
+intwrote=fputc((char)c, stdout);
+assert(wrote!=EOF);
+c=fgetc(file_new);
+ }
+}

test/wasi/test-wasi.js

@@ -60,6 +60,7 @@ if (process.argv[2] === 'wasi-child'){
 runWASI({test: 'clock_getres'});
 runWASI({test: 'exitcode',exitCode: 120});
 runWASI({test: 'fd_prestat_get_refresh'});
+runWASI({test: 'freopen',stdout: `hello from input2.txt${EOL}`});
 runWASI({test: 'getentropy'});
 runWASI({test: 'getrusage'});
 runWASI({test: 'gettimeofday'});