twaitpid.c - plan9port - [fork] Plan 9 from user space
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       ---
       twaitpid.c (293B)
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            1 #include <u.h>
            2 #include <libc.h>
            3 
            4 int
            5 waitpid(void)
            6 {
            7         int n;
            8         char buf[512], *fld[5];
            9 
           10         n = await(buf, sizeof buf-1);
           11         if(n <= 0)
           12                 return -1;
           13         buf[n] = '\0';
           14         if(tokenize(buf, fld, nelem(fld)) != nelem(fld)){
           15                 werrstr("couldn't parse wait message");
           16                 return -1;
           17         }
           18         return atoi(fld[0]);
           19 }