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#define _GNU_SOURCE #include <netdb.h> static const char msgs[] = "Host not found\0" "Try again\0" "Non-recoverable error\0" "Address not available\0" "\0Unknown error"; const char *hstrerror(int ecode) { const char *s; for (s=msgs, ecode--; ecode && *s; ecode--, s++) for (; *s; s++); return *s ? s : s+1; }