summaryrefslogtreecommitdiffstats
path: root/bin/sh/error.c
diff options
context:
space:
mode:
authorrgrimes <rgrimes@FreeBSD.org>1994-05-26 06:18:55 +0000
committerrgrimes <rgrimes@FreeBSD.org>1994-05-26 06:18:55 +0000
commite3cfc8ce61f788739c66445d903f8beacb40c93d (patch)
treeba7beef9ee9289c4383bad976f88710e44c98b4d /bin/sh/error.c
parent862fdf11a2ede45dec0da01ed575525d79468981 (diff)
downloadFreeBSD-src-e3cfc8ce61f788739c66445d903f8beacb40c93d.zip
FreeBSD-src-e3cfc8ce61f788739c66445d903f8beacb40c93d.tar.gz
BSD 4.4 Lite bin Sources
Diffstat (limited to 'bin/sh/error.c')
-rw-r--r--bin/sh/error.c249
1 files changed, 249 insertions, 0 deletions
diff --git a/bin/sh/error.c b/bin/sh/error.c
new file mode 100644
index 0000000..b6853b6
--- /dev/null
+++ b/bin/sh/error.c
@@ -0,0 +1,249 @@
+/*-
+ * Copyright (c) 1991, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Kenneth Almquist.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)error.c 8.1 (Berkeley) 5/31/93";
+#endif /* not lint */
+
+/*
+ * Errors and exceptions.
+ */
+
+#include "shell.h"
+#include "main.h"
+#include "options.h"
+#include "output.h"
+#include "error.h"
+#include <signal.h>
+#ifdef __STDC__
+#include "stdarg.h"
+#else
+#include <varargs.h>
+#endif
+#include <errno.h>
+
+
+/*
+ * Code to handle exceptions in C.
+ */
+
+struct jmploc *handler;
+int exception;
+volatile int suppressint;
+volatile int intpending;
+char *commandname;
+
+
+/*
+ * 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".
+ */
+
+void
+exraise(e) {
+ if (handler == NULL)
+ abort();
+ exception = e;
+ 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.)
+ */
+
+void
+onint() {
+ if (suppressint) {
+ intpending++;
+ return;
+ }
+ intpending = 0;
+#ifdef BSD
+ sigsetmask(0);
+#endif
+ if (rootshell && iflag)
+ exraise(EXINT);
+ else
+ _exit(128 + SIGINT);
+}
+
+
+
+void
+error2(a, b)
+ char *a, *b;
+ {
+ error("%s: %s", a, b);
+}
+
+
+/*
+ * 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.
+ */
+
+#ifdef __STDC__
+void
+error(char *msg, ...) {
+#else
+void
+error(va_alist)
+ va_dcl
+ {
+ char *msg;
+#endif
+ va_list ap;
+
+ CLEAR_PENDING_INT;
+ INTOFF;
+#ifdef __STDC__
+ va_start(ap, msg);
+#else
+ va_start(ap);
+ msg = va_arg(ap, char *);
+#endif
+#ifdef DEBUG
+ if (msg)
+ TRACE(("error(\"%s\") pid=%d\n", msg, getpid()));
+ else
+ TRACE(("error(NULL) pid=%d\n", getpid()));
+#endif
+ if (msg) {
+ if (commandname)
+ outfmt(&errout, "%s: ", commandname);
+ doformat(&errout, msg, ap);
+ out2c('\n');
+ }
+ va_end(ap);
+ flushall();
+ exraise(EXERROR);
+}
+
+
+
+/*
+ * Table of error messages.
+ */
+
+struct errname {
+ 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",
+ 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;
+}
OpenPOWER on IntegriCloud