* Copyright (c) 1991 The Regents of the University of California.
* This code is derived from software contributed to Berkeley by
* %sccs.include.redist.c%
static char sccsid
[] = "@(#)error.c 5.1 (Berkeley) %G%";
* Code to handle exceptions in C.
volatile int suppressint
;
* Called to raise an exception. Since C doesn't include exceptions, we
* just do a longjmp to the exception handler. The type of exception is
* stored in the global variable "exception".
longjmp(handler
->loc
, 1);
* Called from trap.c when a SIGINT is received. (If the user specifies
* that SIGINT is to be trapped or ignored using the trap builtin, then
* this routine is not called.) Suppressint is nonzero when interrupts
* are held using the INTOFF macro. The call to _exit is necessary because
* there is a short period after a fork before the signal handlers are
* set to the appropriate value for the child. (The test for iflag is
* just defensive programming.)
* Error is called to raise the error exception. If the first argument
* is not NULL then error prints an error message using printf style
* formatting. It then raises the error exception.
msg
= va_arg(ap
, char *);
TRACE(("error(\"%s\") pid=%d\n", msg
, getpid()));
TRACE(("error(NULL) pid=%d\n", getpid()));
outfmt(&errout
, "%s: ", commandname
);
doformat(&errout
, msg
, ap
);
* Table of error messages.
short errcode
; /* error number */
short action
; /* operation which encountered the error */
char *msg
; /* text describing the error */
#define ALL (E_OPEN|E_CREAT|E_EXEC)
STATIC
const struct errname errormsg
[] = {
EINTR
, ALL
, "interrupted",
EACCES
, ALL
, "permission denied",
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",
EDQUOT
, ALL
, "disk quota exceeded",
ENOSR
, ALL
, "no streams resources",
ENXIO
, ALL
, "no such device or address",
EROFS
, ALL
, "read-only file system",
ETXTBSY
, ALL
, "text busy",
EAGAIN
, E_EXEC
, "not enough memory",
ENOMEM
, ALL
, "not enough memory",
ENOLINK
, ALL
, "remote access failed"
EMULTIHOP
, ALL
, "remote access failed",
ECOMM
, ALL
, "remote access failed",
ESTALE
, ALL
, "remote access failed",
ETIMEDOUT
, ALL
, "remote access failed",
ELOOP
, ALL
, "symbolic link loop",
E2BIG
, E_EXEC
, "argument list too long",
ELIBACC
, E_EXEC
, "shared library missing",
* 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.
struct errname
const *ep
;
for (ep
= errormsg
; ep
->errcode
; ep
++) {
if (ep
->errcode
== e
&& (ep
->action
& action
) != 0)
fmtstr(buf
, sizeof buf
, "error %d", e
);