why does cppcheck wont report any error if there is a miss in close() system cal

[pavithra rani]

Hi,

I can find cppcheck throwing Resource Leak whenever there is a fopen() call is made but fclose is missing.
#include <stdio.h>

include <stdlib.h>

int main()
{
FILE * fp;

fp = fopen ("file.txt", "w+");
fprintf(fp, "%s %s %s %d", "We", "are", "in", 2016);
return(0);
}

Results: (error) Resource leak: fp
fclose(fp) is missing.
but

define FNAME "a.txt"

int main()
{
int fd;
fd=open(FNAME,O_RDONLY,0);
return 0;
}

Cppcheck wont throw any error as resource leak.

please reply if any one is aware of this.

Thanks,
Pavithra

[Alexey Dokuchaev]

By default, cppcheck does not catch open() leaks for some reason, but it will if invoked with --library=posix switch.

[Daniel Marjamäki]

Yes, use all --library options that apply. The --library=posix can't be loaded by default because there are many users that don't target posix systems.