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Diffstat (limited to 'error.c')
| -rw-r--r-- | error.c | 511 |
1 files changed, 511 insertions, 0 deletions
@@ -0,0 +1,511 @@ +/* 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); +} |