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added strerror replacement (for SunOS)

    1: #include <errno.h>
    2: #include <stdio.h>
    3: 
    4: extern char *sys_errlist[];
    5: extern int sys_nerr;
    6: 
    7: char *strerror(int err)
    8: {
    9:   if (err<sys_nerr) /* !! or check with <= ? */
   10:     return sys_errlist[err];
   11:   else {
   12:     static char errbuf[50];
   13:     sprintf(errbuf,"Unknown system error %d",err);
   14:     return errbuf;
   15:   }
   16: }