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-rw-r--r--error.c511
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+/* error.c -- Functions for handling errors. */
+
+/* Copyright (C) 1993-2020 Free Software Foundation, Inc.
+
+ This file is part of GNU Bash, the Bourne Again SHell.
+
+ Bash is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Bash is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Bash. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "config.h"
+
+#include "bashtypes.h"
+#include <fcntl.h>
+
+#if defined (HAVE_UNISTD_H)
+# include <unistd.h>
+#endif
+
+#if defined (PREFER_STDARG)
+# include <stdarg.h>
+#else
+# include <varargs.h>
+#endif
+
+#include <stdio.h>
+
+#include <errno.h>
+#if !defined (errno)
+extern int errno;
+#endif /* !errno */
+
+#include "bashansi.h"
+#include "bashintl.h"
+
+#include "shell.h"
+#include "execute_cmd.h"
+#include "flags.h"
+#include "input.h"
+
+#if defined (HISTORY)
+# include "bashhist.h"
+#endif
+
+extern int executing_line_number PARAMS((void));
+
+#if defined (JOB_CONTROL)
+extern pid_t shell_pgrp;
+extern int give_terminal_to PARAMS((pid_t, int));
+#endif /* JOB_CONTROL */
+
+#if defined (ARRAY_VARS)
+extern const char * const bash_badsub_errmsg;
+#endif
+
+static void error_prolog PARAMS((int));
+
+/* The current maintainer of the shell. You change this in the
+ Makefile. */
+#if !defined (MAINTAINER)
+#define MAINTAINER "bash-maintainers@gnu.org"
+#endif
+
+const char * const the_current_maintainer = MAINTAINER;
+
+int gnu_error_format = 0;
+
+static void
+error_prolog (print_lineno)
+ int print_lineno;
+{
+ char *ename;
+ int line;
+
+ ename = get_name_for_error ();
+ line = (print_lineno && interactive_shell == 0) ? executing_line_number () : -1;
+
+ if (line > 0)
+ fprintf (stderr, "%s:%s%d: ", ename, gnu_error_format ? "" : _(" line "), line);
+ else
+ fprintf (stderr, "%s: ", ename);
+}
+
+/* Return the name of the shell or the shell script for error reporting. */
+char *
+get_name_for_error ()
+{
+ char *name;
+#if defined (ARRAY_VARS)
+ SHELL_VAR *bash_source_v;
+ ARRAY *bash_source_a;
+#endif
+
+ name = (char *)NULL;
+ if (interactive_shell == 0)
+ {
+#if defined (ARRAY_VARS)
+ bash_source_v = find_variable ("BASH_SOURCE");
+ if (bash_source_v && array_p (bash_source_v) &&
+ (bash_source_a = array_cell (bash_source_v)))
+ name = array_reference (bash_source_a, 0);
+ if (name == 0 || *name == '\0') /* XXX - was just name == 0 */
+#endif
+ name = dollar_vars[0];
+ }
+ if (name == 0 && shell_name && *shell_name)
+ name = base_pathname (shell_name);
+ if (name == 0)
+#if defined (PROGRAM)
+ name = PROGRAM;
+#else
+ name = "bash";
+#endif
+
+ return (name);
+}
+
+/* Report an error having to do with FILENAME. This does not use
+ sys_error so the filename is not interpreted as a printf-style
+ format string. */
+void
+file_error (filename)
+ const char *filename;
+{
+ report_error ("%s: %s", filename, strerror (errno));
+}
+
+void
+#if defined (PREFER_STDARG)
+programming_error (const char *format, ...)
+#else
+programming_error (format, va_alist)
+ const char *format;
+ va_dcl
+#endif
+{
+ va_list args;
+ char *h;
+
+#if defined (JOB_CONTROL)
+ give_terminal_to (shell_pgrp, 0);
+#endif /* JOB_CONTROL */
+
+ SH_VA_START (args, format);
+
+ vfprintf (stderr, format, args);
+ fprintf (stderr, "\n");
+ va_end (args);
+
+#if defined (HISTORY)
+ if (remember_on_history)
+ {
+ h = last_history_line ();
+ fprintf (stderr, _("last command: %s\n"), h ? h : "(null)");
+ }
+#endif
+
+#if 0
+ fprintf (stderr, "Report this to %s\n", the_current_maintainer);
+#endif
+
+ fprintf (stderr, _("Aborting..."));
+ fflush (stderr);
+
+ abort ();
+}
+
+/* Print an error message and, if `set -e' has been executed, exit the
+ shell. Used in this file by file_error and programming_error. Used
+ outside this file mostly to report substitution and expansion errors,
+ and for bad invocation options. */
+void
+#if defined (PREFER_STDARG)
+report_error (const char *format, ...)
+#else
+report_error (format, va_alist)
+ const char *format;
+ va_dcl
+#endif
+{
+ va_list args;
+
+ error_prolog (1);
+
+ SH_VA_START (args, format);
+
+ vfprintf (stderr, format, args);
+ fprintf (stderr, "\n");
+
+ va_end (args);
+ if (exit_immediately_on_error)
+ {
+ if (last_command_exit_value == 0)
+ last_command_exit_value = EXECUTION_FAILURE;
+ exit_shell (last_command_exit_value);
+ }
+}
+
+void
+#if defined (PREFER_STDARG)
+fatal_error (const char *format, ...)
+#else
+fatal_error (format, va_alist)
+ const char *format;
+ va_dcl
+#endif
+{
+ va_list args;
+
+ error_prolog (0);
+
+ SH_VA_START (args, format);
+
+ vfprintf (stderr, format, args);
+ fprintf (stderr, "\n");
+
+ va_end (args);
+ sh_exit (2);
+}
+
+void
+#if defined (PREFER_STDARG)
+internal_error (const char *format, ...)
+#else
+internal_error (format, va_alist)
+ const char *format;
+ va_dcl
+#endif
+{
+ va_list args;
+
+ error_prolog (1);
+
+ SH_VA_START (args, format);
+
+ vfprintf (stderr, format, args);
+ fprintf (stderr, "\n");
+
+ va_end (args);
+}
+
+void
+#if defined (PREFER_STDARG)
+internal_warning (const char *format, ...)
+#else
+internal_warning (format, va_alist)
+ const char *format;
+ va_dcl
+#endif
+{
+ va_list args;
+
+ error_prolog (1);
+ fprintf (stderr, _("warning: "));
+
+ SH_VA_START (args, format);
+
+ vfprintf (stderr, format, args);
+ fprintf (stderr, "\n");
+
+ va_end (args);
+}
+
+void
+#if defined (PREFER_STDARG)
+internal_inform (const char *format, ...)
+#else
+internal_inform (format, va_alist)
+ const char *format;
+ va_dcl
+#endif
+{
+ va_list args;
+
+ error_prolog (1);
+ /* TRANSLATORS: this is a prefix for informational messages. */
+ fprintf (stderr, _("INFORM: "));
+
+ SH_VA_START (args, format);
+
+ vfprintf (stderr, format, args);
+ fprintf (stderr, "\n");
+
+ va_end (args);
+}
+
+void
+#if defined (PREFER_STDARG)
+sys_error (const char *format, ...)
+#else
+sys_error (format, va_alist)
+ const char *format;
+ va_dcl
+#endif
+{
+ int e;
+ va_list args;
+
+ e = errno;
+ error_prolog (0);
+
+ SH_VA_START (args, format);
+
+ vfprintf (stderr, format, args);
+ fprintf (stderr, ": %s\n", strerror (e));
+
+ va_end (args);
+}
+
+/* An error from the parser takes the general form
+
+ shell_name: input file name: line number: message
+
+ The input file name and line number are omitted if the shell is
+ currently interactive. If the shell is not currently interactive,
+ the input file name is inserted only if it is different from the
+ shell name. */
+void
+#if defined (PREFER_STDARG)
+parser_error (int lineno, const char *format, ...)
+#else
+parser_error (lineno, format, va_alist)
+ int lineno;
+ const char *format;
+ va_dcl
+#endif
+{
+ va_list args;
+ char *ename, *iname;
+
+ ename = get_name_for_error ();
+ iname = yy_input_name ();
+
+ if (interactive)
+ fprintf (stderr, "%s: ", ename);
+ else if (interactive_shell)
+ fprintf (stderr, "%s: %s:%s%d: ", ename, iname, gnu_error_format ? "" : _(" line "), lineno);
+ else if (STREQ (ename, iname))
+ fprintf (stderr, "%s:%s%d: ", ename, gnu_error_format ? "" : _(" line "), lineno);
+ else
+ fprintf (stderr, "%s: %s:%s%d: ", ename, iname, gnu_error_format ? "" : _(" line "), lineno);
+
+ SH_VA_START (args, format);
+
+ vfprintf (stderr, format, args);
+ fprintf (stderr, "\n");
+
+ va_end (args);
+
+ if (exit_immediately_on_error)
+ exit_shell (last_command_exit_value = 2);
+}
+
+#ifdef DEBUG
+/* This assumes ASCII and is suitable only for debugging */
+char *
+strescape (str)
+ const char *str;
+{
+ char *r, *result;
+ unsigned char *s;
+
+ r = result = (char *)xmalloc (strlen (str) * 2 + 1);
+
+ for (s = (unsigned char *)str; s && *s; s++)
+ {
+ if (*s < ' ')
+ {
+ *r++ = '^';
+ *r++ = *s+64;
+ }
+ else if (*s == 127)
+ {
+ *r++ = '^';
+ *r++ = '?';
+ }
+ else
+ *r++ = *s;
+ }
+
+ *r = '\0';
+ return result;
+}
+
+void
+#if defined (PREFER_STDARG)
+itrace (const char *format, ...)
+#else
+itrace (format, va_alist)
+ const char *format;
+ va_dcl
+#endif
+{
+ va_list args;
+
+ fprintf(stderr, "TRACE: pid %ld: ", (long)getpid());
+
+ SH_VA_START (args, format);
+
+ vfprintf (stderr, format, args);
+ fprintf (stderr, "\n");
+
+ va_end (args);
+
+ fflush(stderr);
+}
+
+/* A trace function for silent debugging -- doesn't require a control
+ terminal. */
+void
+#if defined (PREFER_STDARG)
+trace (const char *format, ...)
+#else
+trace (format, va_alist)
+ const char *format;
+ va_dcl
+#endif
+{
+ va_list args;
+ static FILE *tracefp = (FILE *)NULL;
+
+ if (tracefp == NULL)
+ tracefp = fopen("/tmp/bash-trace.log", "a+");
+
+ if (tracefp == NULL)
+ tracefp = stderr;
+ else
+ fcntl (fileno (tracefp), F_SETFD, 1); /* close-on-exec */
+
+ fprintf(tracefp, "TRACE: pid %ld: ", (long)getpid());
+
+ SH_VA_START (args, format);
+
+ vfprintf (tracefp, format, args);
+ fprintf (tracefp, "\n");
+
+ va_end (args);
+
+ fflush(tracefp);
+}
+
+#endif /* DEBUG */
+
+/* **************************************************************** */
+/* */
+/* Common error reporting */
+/* */
+/* **************************************************************** */
+
+
+static const char * const cmd_error_table[] = {
+ N_("unknown command error"), /* CMDERR_DEFAULT */
+ N_("bad command type"), /* CMDERR_BADTYPE */
+ N_("bad connector"), /* CMDERR_BADCONN */
+ N_("bad jump"), /* CMDERR_BADJUMP */
+ 0
+};
+
+void
+command_error (func, code, e, flags)
+ const char *func;
+ int code, e, flags; /* flags currently unused */
+{
+ if (code > CMDERR_LAST)
+ code = CMDERR_DEFAULT;
+
+ programming_error ("%s: %s: %d", func, _(cmd_error_table[code]), e);
+}
+
+char *
+command_errstr (code)
+ int code;
+{
+ if (code > CMDERR_LAST)
+ code = CMDERR_DEFAULT;
+
+ return (_(cmd_error_table[code]));
+}
+
+#ifdef ARRAY_VARS
+void
+err_badarraysub (s)
+ const char *s;
+{
+ report_error ("%s: %s", s, _(bash_badsub_errmsg));
+}
+#endif
+
+void
+err_unboundvar (s)
+ const char *s;
+{
+ report_error (_("%s: unbound variable"), s);
+}
+
+void
+err_readonly (s)
+ const char *s;
+{
+ report_error (_("%s: readonly variable"), s);
+}