commands/ash/errmsg.c

   1 /*-
   2  * Copyright (c) 1991, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Kenneth Almquist.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  */
  36
  37 #ifndef lint
  38 static char sccsid[] = "@(#)errmsg.c    8.1 (Berkeley) 5/31/93";
  39 #endif /* not lint */
  40
  41 #include "shell.h"
  42 #include "output.h"
  43 #include "errmsg.h"
  44 #include <errno.h>
  45
  46
  47 #define ALL (E_OPEN|E_CREAT|E_EXEC)
  48
  49
  50 struct errname {
  51         short errcode;          /* error number */
  52         short action;           /* operation which encountered the error */
  53         char *msg;              /* text describing the error */
  54 };
  55
  56
  57 STATIC const struct errname errormsg[] = {
  58         EINTR, ALL,     "interrupted",
  59         EACCES, ALL,    "permission denied",
  60         EIO, ALL,               "I/O error",
  61         ENOENT, E_OPEN, "no such file",
  62         ENOENT, E_CREAT,        "directory nonexistent",
  63         ENOENT, E_EXEC, "not found",
  64         ENOTDIR, E_OPEN,        "no such file",
  65         ENOTDIR, E_CREAT,       "directory nonexistent",
  66         ENOTDIR, E_EXEC,        "not found",
  67         EISDIR, ALL,    "is a directory",
  68 /*    EMFILE, ALL,      "too many open files", */
  69         ENFILE, ALL,    "file table overflow",
  70         ENOSPC, ALL,    "file system full",
  71 #ifdef EDQUOT
  72         EDQUOT, ALL,    "disk quota exceeded",
  73 #endif
  74 #ifdef ENOSR
  75         ENOSR, ALL,     "no streams resources",
  76 #endif
  77         ENXIO, ALL,     "no such device or address",
  78         EROFS, ALL,     "read-only file system",
  79         ETXTBSY, ALL,   "text busy",
  80 #ifdef SYSV
  81         EAGAIN, E_EXEC, "not enough memory",
  82 #endif
  83         ENOMEM, ALL,    "not enough memory",
  84 #ifdef ENOLINK
  85         ENOLINK, ALL,   "remote access failed"
  86 #endif
  87 #ifdef EMULTIHOP
  88         EMULTIHOP, ALL, "remote access failed",
  89 #endif
  90 #ifdef ECOMM
  91         ECOMM, ALL,     "remote access failed",
  92 #endif
  93 #ifdef ESTALE
  94         ESTALE, ALL,    "remote access failed",
  95 #endif
  96 #ifdef ETIMEDOUT
  97         ETIMEDOUT, ALL, "remote access failed",
  98 #endif
  99 #ifdef ELOOP
 100         ELOOP, ALL,     "symbolic link loop",
 101 #endif
 102         E2BIG, E_EXEC,  "argument list too long",
 103 #ifdef ELIBACC
 104         ELIBACC, E_EXEC,        "shared library missing",
 105 #endif
 106         0, 0,           NULL
 107 };
 108
 109
 110 /*
 111  * Return a string describing an error.  The returned string may be a
 112  * pointer to a static buffer that will be overwritten on the next call.
 113  * Action describes the operation that got the error.
 114  */
 115
 116 char *
 117 errmsg(e, action) {
 118         struct errname const *ep;
 119         static char buf[12];
 120
 121         for (ep = errormsg ; ep->errcode ; ep++) {
 122                 if (ep->errcode == e && (ep->action & action) != 0)
 123                         return ep->msg;
 124         }
 125         fmtstr(buf, sizeof buf, "error %d", e);
 126         return buf;
 127 }