#include "shell.h"
#include "output.h"
#include "errmsg.h"
#include "myerrno.h"


#define ALL (E_OPEN|E_CREAT|E_EXEC)


struct errname {
      short errcode;		/* error number */
      short action;		/* operation which encountered the error */
      char *msg;		/* text describing the error */
};


STATIC const struct errname errormsg[] = {
      EINTR, ALL,	"interrupted",
      EACCES, ALL,	"permission denied",
      EIO, ALL,		"I/O error",
      ENOENT, E_OPEN,	"no such file",
      ENOENT, E_CREAT,	"directory nonexistent",
      ENOENT, E_EXEC,	"not found",
      ENOTDIR, E_OPEN,	"no such file",
      ENOTDIR, E_CREAT,	"directory nonexistent",
      ENOTDIR, E_EXEC,	"not found",
      EISDIR, ALL,	"is a directory",
/*    EMFILE, ALL,	"too many open files", */
      ENFILE, ALL,	"file table overflow",
      ENOSPC, ALL,	"file system full",
#ifdef EDQUOT
      EDQUOT, ALL,	"disk quota exceeded",
#endif
#ifdef ENOSR
      ENOSR, ALL,	"no streams resources",
#endif
      ENXIO, ALL,	"no such device or address",
      EROFS, ALL,	"read-only file system",
      ETXTBSY, ALL,	"text busy",
#ifdef SYSV
      EAGAIN, E_EXEC,	"not enough memory",
#endif
      ENOMEM, ALL,	"not enough memory",
#ifdef ENOLINK
      ENOLINK, ALL,	"remote access failed"
#endif
#ifdef EMULTIHOP
      EMULTIHOP, ALL,	"remote access failed",
#endif
#ifdef ECOMM
      ECOMM, ALL,	"remote access failed",
#endif
#ifdef ESTALE
      ESTALE, ALL,	"remote access failed",
#endif
#ifdef ETIMEDOUT
      ETIMEDOUT, ALL,	"remote access failed",
#endif
#ifdef ELOOP
      ELOOP, ALL,	"symbolic link loop",
#endif
      E2BIG, E_EXEC,	"argument list too long",
#ifdef ELIBACC
      ELIBACC, E_EXEC,	"shared library missing",
#endif
      0, 0,		NULL
};


/*
 * Return a string describing an error.  The returned string may be a
 * pointer to a static buffer that will be overwritten on the next call.
 * Action describes the operation that got the error.
 */

char *
errmsg(e, action) {
      struct errname const *ep;
      static char buf[12];

      for (ep = errormsg ; ep->errcode ; ep++) {
	    if (ep->errcode == e && (ep->action & action) != 0)
		  return ep->msg;
      }
      fmtstr(buf, sizeof buf, "error %d", e);
      return buf;
}