Ticket #6503: statfs.c

#include <sys/vfs.h>
#include <stdio.h>
#include <strings.h>

int main(int argc, char **argv) {
        struct statfs statbuf;
        long long total;
        long long free;

        if (argc > 1) {
                bzero(&statbuf, sizeof(statbuf));
                if (statfs(argv[1], &statbuf) == 0) {
                        printf( "Info for  : %s\n", argv[1] );
                        printf( "FS Type   : 0x%x\n",
                                statbuf.f_type );
                        printf( "Tot Blks  : %ld\n", statbuf.f_blocks);
                        printf( "Free Blks : %ld\n", statbuf.f_bavail);
                        printf( "Block Size: %ld\n", statbuf.f_bsize);

                        total  = statbuf.f_blocks;
                        total *= statbuf.f_bsize;
                        total  = total >> 10;
                        printf( "TotalKB   : %8lld KB ((%ld * %ld) >> 10)\n",
                                total, statbuf.f_blocks, statbuf.f_bsize);

                        free  = statbuf.f_bavail;
                        free *= statbuf.f_bsize;
                        free  = free >> 10;
                        printf( "FreeKB    : %8lld KB ((%ld * %ld) >> 10)\n",
                                free, statbuf.f_bavail, statbuf.f_bsize);

                        printf( "UsedKB    : %8lld KB (calculated from TotalKB - FreeKB)\n",
                                total - free);
                } else {
                        printf( "ERROR: statfs() returned non-zero\n" );
                        perror("statfs()");
                        return( -1 );
                }
        } else {
                printf( "USAGE: %s DIRECTORY\n", argv[0] );
                return( -1 );
        }

        return( 0 );
}