ttrunc.c - plan9port - [fork] Plan 9 from user space
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       ---
       ttrunc.c (280B)
       ---
            1 #include <u.h>
            2 #include <libc.h>
            3 
            4 void
            5 main(int argc, char **argv)
            6 {
            7         Dir d;
            8 
            9         if(argc != 3){
           10                 fprint(2, "usage: trunc file size\n");
           11                 exits("usage");
           12         }
           13 
           14         nulldir(&d);
           15         d.length = strtoull(argv[2], 0, 0);
           16         if(dirwstat(argv[1], &d) < 0)
           17                 sysfatal("dirwstat: %r");
           18         exits(0);
           19 }