output wrong

[lzqyxzh]

the followed code run normal on linux with fmemopen(),but wiht your fmemopen on windows,the output is wrong,can you help to test it,thank you.the result should be "hello,world!".

====code====
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

char *write_to_buf(char *msg)
{
char *buf = (char *)malloc(1024);

FILE *fp = fmemopen(buf, 1024, "w");
fwrite(msg, 1, strlen(msg), fp);
fclose(fp);

return buf;

}

int main(void)
{
char *str = "hello, world!";
char *buf = write_to_buf(str);

printf("%s\n", buf);

free(buf);

return 0;

}

[GerHobbelt]

Should work when you either call calloc() or fwrite(msg, 1, strlen(msg) + 1, fp): the point here is that Windows does not zero allocated memory (unless you use calloc(), while many Linuxes do. Your code is theoretically buggy as you forgot to write the NUL string sentinel, so you're riding system-specific and situation-dependent behaviour here.