tpbd.c - plan9port - [fork] Plan 9 from user space
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       ---
       tpbd.c (246B)
       ---
            1 #include <u.h>
            2 #include <libc.h>
            3 
            4 void
            5 main(void)
            6 {
            7         char buf[512], *p;
            8 
            9         p = "???";
           10         if(getwd(buf, sizeof buf)){
           11                 p = strrchr(buf, '/');
           12                 if(p == nil)
           13                         p = buf;
           14                 else if(p>buf || p[1]!='\0')
           15                         p++;
           16         }
           17         write(1, p, strlen(p));
           18         exits(0);
           19 }