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       tsysname.c - plan9port - [fork] Plan 9 from user space
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       ---
       tsysname.c (420B)
       ---
            1 #include <u.h>
            2 #include <libc.h>
            3 
            4 char*
            5 sysname(void)
            6 {
            7         static char buf[512];
            8         char *p, *q;
            9 
           10         if(buf[0])
           11                 return buf;
           12 
           13         if((q = getenv("sysname")) != nil && q[0] != 0){
           14                 utfecpy(buf, buf+sizeof buf, q);
           15                 free(q);
           16                 return buf;
           17         }
           18         if(q)
           19                 free(q);
           20 
           21         if(gethostname(buf, sizeof buf) >= 0){
           22                 buf[sizeof buf-1] = 0;
           23                 if((p = strchr(buf, '.')) != nil)
           24                         *p = 0;
           25                 return buf;
           26         }
           27 
           28         strcpy(buf, "gnot");
           29         return buf;
           30 }