src/port/strerror.c

   1 /* $PostgreSQL$ */
   2
   3 /*
   4  * strerror - map error number to descriptive string
   5  *
   6  * This version is obviously somewhat Unix-specific.
   7  *
   8  * based on code by Henry Spencer
   9  * modified for ANSI by D'Arcy J.M. Cain
  10  */
  11
  12 #include "c.h"
  13
  14
  15 extern const char *const sys_errlist[];
  16 extern int      sys_nerr;
  17
  18 const char *
  19 strerror(int errnum)
  20 {
  21         static char buf[24];
  22
  23         if (errnum < 0 || errnum > sys_nerr)
  24         {
  25                 sprintf(buf, _("unrecognized error %d"), errnum);
  26                 return buf;
  27         }
  28
  29         return sys_errlist[errnum];
  30 }