| 1 |
/* |
| 2 |
* getopt.c - Enhanced implementation of BSD getopt(1) |
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* Copyright (c) 1997-2014 Frodo Looijaard <frodo@frodo.looijaard.name> |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License along |
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* with this program; if not, write to the Free Software Foundation, Inc., |
| 17 |
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
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*/ |
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|
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/* |
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* Version 1.0-b4: Tue Sep 23 1997. First public release. |
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* Version 1.0: Wed Nov 19 1997. |
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* Bumped up the version number to 1.0 |
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* Fixed minor typo (CSH instead of TCSH) |
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* Version 1.0.1: Tue Jun 3 1998 |
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* Fixed sizeof instead of strlen bug |
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* Bumped up the version number to 1.0.1 |
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* Version 1.0.2: Thu Jun 11 1998 (not present) |
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* Fixed gcc-2.8.1 warnings |
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* Fixed --version/-V option (not present) |
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* Version 1.0.5: Tue Jun 22 1999 |
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* Make -u option work (not present) |
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* Version 1.0.6: Tue Jun 27 2000 |
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* No important changes |
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* Version 1.1.0: Tue Jun 30 2000 |
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* Added NLS support (partly written by Arkadiusz Miśkiewicz |
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* <misiek@pld.org.pl>) |
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* Version 1.1.4: Mon Nov 7 2005 |
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* Fixed a few type's in the manpage |
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* Version 1.1.5: Sun Aug 12 2012 |
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* Sync with util-linux-2.21, fixed build problems, many new translations |
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* Version 1.1.6: ??? 2014 |
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* Sync with util-linux git 20141120, detect ambiguous long options |
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*/ |
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|
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/* Exit codes: |
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* 0) No errors, successful operation. |
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* 1) getopt(3) returned an error. |
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* 2) A problem with parameter parsing for getopt(1). |
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* 3) Internal error, out of memory |
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* 4) Returned for -T |
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*/ |
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#define GETOPT_EXIT_CODE 1 |
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#define PARAMETER_EXIT_CODE 2 |
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#define XALLOC_EXIT_CODE 3 |
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#define TEST_EXIT_CODE 4 |
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|
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <unistd.h> |
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#include <ctype.h> |
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|
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#if LIBCGETOPT |
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#include <getopt.h> |
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#else |
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#include "getopt.h" |
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#endif |
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|
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#include "util-linux-compat.h" |
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#include "nls.h" |
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#include "xalloc.h" |
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|
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/* NON_OPT is the code that is returned when a non-option is found in '+' |
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* mode */ |
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#define NON_OPT 1 |
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/* LONG_OPT is the code that is returned when a long option is found. */ |
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#define LONG_OPT 0 |
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|
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/* The shells recognized. */ |
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typedef enum { BASH, TCSH } shell_t; |
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|
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|
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/* Some global variables that tells us how to parse. */ |
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static shell_t shell = BASH; /* The shell we generate output for. */ |
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static int quiet_errors = 0; /* 0 is not quiet. */ |
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static int quiet_output = 0; /* 0 is not quiet. */ |
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static int quote = 1; /* 1 is do quote. */ |
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|
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/* Allow changing which getopt is in use with function pointer */ |
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int (*getopt_long_fp) (int argc, char *const *argv, const char *optstr, |
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const struct option * longopts, int *longindex); |
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|
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/* Function prototypes */ |
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static const char *normalize(const char *arg); |
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static int generate_output(char *argv[], int argc, const char *optstr, |
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const struct option *longopts); |
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static void parse_error(const char *message); |
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static void add_long_options(char *options); |
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static void add_longopt(const char *name, int has_arg); |
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static void print_help(void); |
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static void set_shell(const char *new_shell); |
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|
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/* |
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* This function 'normalizes' a single argument: it puts single quotes |
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* around it and escapes other special characters. If quote is false, it |
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* just returns its argument. |
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* |
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* Bash only needs special treatment for single quotes; tcsh also recognizes |
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* exclamation marks within single quotes, and nukes whitespace. This |
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* function returns a pointer to a buffer that is overwritten by each call. |
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*/ |
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static const char *normalize(const char *arg) |
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{ |
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static char *BUFFER = NULL; |
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const char *argptr = arg; |
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char *bufptr; |
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|
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free(BUFFER); |
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|
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if (!quote) { |
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/* Just copy arg */ |
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BUFFER = xmalloc(strlen(arg) + 1); |
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strcpy(BUFFER, arg); |
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return BUFFER; |
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} |
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|
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/* |
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* Each character in arg may take up to four characters in the |
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* result: For a quote we need a closing quote, a backslash, a quote |
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* and an opening quote! We need also the global opening and closing |
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* quote, and one extra character for '\0'. |
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*/ |
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BUFFER = xmalloc(strlen(arg) * 4 + 3); |
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|
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bufptr = BUFFER; |
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*bufptr++ = '\''; |
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|
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while (*argptr) { |
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if (*argptr == '\'') { |
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/* Quote: replace it with: '\'' */ |
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*bufptr++ = '\''; |
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*bufptr++ = '\\'; |
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*bufptr++ = '\''; |
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*bufptr++ = '\''; |
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} else if (shell == TCSH && *argptr == '!') { |
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/* Exclamation mark: replace it with: \! */ |
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*bufptr++ = '\''; |
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*bufptr++ = '\\'; |
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*bufptr++ = '!'; |
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*bufptr++ = '\''; |
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} else if (shell == TCSH && *argptr == '\n') { |
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/* Newline: replace it with: \n */ |
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*bufptr++ = '\\'; |
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*bufptr++ = 'n'; |
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} else if (shell == TCSH && isspace(*argptr)) { |
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/* Non-newline whitespace: replace it with \<ws> */ |
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*bufptr++ = '\''; |
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*bufptr++ = '\\'; |
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*bufptr++ = *argptr; |
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*bufptr++ = '\''; |
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} else |
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/* Just copy */ |
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*bufptr++ = *argptr; |
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argptr++; |
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} |
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*bufptr++ = '\''; |
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*bufptr++ = '\0'; |
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return BUFFER; |
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} |
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|
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/* |
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* Generate the output. argv[0] is the program name (used for reporting errors). |
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* argv[1..] contains the options to be parsed. argc must be the number of |
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* elements in argv (ie. 1 if there are no options, only the program name), |
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* optstr must contain the short options, and longopts the long options. |
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* Other settings are found in global variables. |
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*/ |
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static int generate_output(char *argv[], int argc, const char *optstr, |
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const struct option *longopts) |
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{ |
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int exit_code = EXIT_SUCCESS; /* Assume everything will be OK */ |
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int opt; |
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int longindex; |
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const char *charptr; |
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|
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if (quiet_errors) |
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/* No error reporting from getopt(3) */ |
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opterr = 0; |
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/* Reset getopt(3) */ |
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optind = 0; |
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|
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while ((opt = |
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(getopt_long_fp(argc, argv, optstr, longopts, &longindex))) |
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!= EOF) |
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if (opt == '?' || opt == ':') |
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exit_code = GETOPT_EXIT_CODE; |
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else if (!quiet_output) { |
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if (opt == LONG_OPT) { |
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printf(" --%s", longopts[longindex].name); |
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if (longopts[longindex].has_arg) |
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printf(" %s", normalize(optarg ? optarg : "")); |
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} else if (opt == NON_OPT) |
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printf(" %s", normalize(optarg ? optarg : "")); |
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else { |
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printf(" -%c", opt); |
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charptr = strchr(optstr, opt); |
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if (charptr != NULL && *++charptr == ':') |
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printf(" %s", normalize(optarg ? optarg : "")); |
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} |
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} |
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|
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if (!quiet_output) { |
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printf(" --"); |
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while (optind < argc) |
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printf(" %s", normalize(argv[optind++])); |
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printf("\n"); |
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} |
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return exit_code; |
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} |
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|
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/* |
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* Report an error when parsing getopt's own arguments. If message is NULL, |
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* we already sent a message, we just exit with a helpful hint. |
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*/ |
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static void __attribute__ ((__noreturn__)) parse_error(const char *message) |
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{ |
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if (message) |
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warnx("%s", message); |
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fprintf(stderr, _("Try `%s --help' for more information.\n"), |
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program_invocation_short_name); |
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exit(PARAMETER_EXIT_CODE); |
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} |
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|
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static struct option *long_options = NULL; |
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static int long_options_length = 0; /* Length of array */ |
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static int long_options_nr = 0; /* Nr of used elements in array */ |
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#define LONG_OPTIONS_INCR 10 |
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#define init_longopt() add_longopt(NULL,0) |
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|
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/* Register a long option. The contents of name is copied. */ |
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static void add_longopt(const char *name, int has_arg) |
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{ |
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char *tmp; |
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static int flag; |
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|
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if (!name) { |
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/* init */ |
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free(long_options); |
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long_options = NULL; |
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long_options_length = 0; |
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long_options_nr = 0; |
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} |
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|
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if (long_options_nr == long_options_length) { |
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long_options_length += LONG_OPTIONS_INCR; |
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long_options = xrealloc(long_options, |
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sizeof(struct option) * |
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long_options_length); |
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} |
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|
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long_options[long_options_nr].name = NULL; |
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long_options[long_options_nr].has_arg = 0; |
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long_options[long_options_nr].flag = NULL; |
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long_options[long_options_nr].val = 0; |
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|
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if (long_options_nr && name) { |
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/* Not for init! */ |
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long_options[long_options_nr - 1].has_arg = has_arg; |
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long_options[long_options_nr - 1].flag = &flag; |
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long_options[long_options_nr - 1].val = long_options_nr; |
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tmp = xmalloc(strlen(name) + 1); |
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strcpy(tmp, name); |
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long_options[long_options_nr - 1].name = tmp; |
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} |
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long_options_nr++; |
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} |
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|
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|
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/* |
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* Register several long options. options is a string of long options, |
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* separated by commas or whitespace. This nukes options! |
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*/ |
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static void add_long_options(char *options) |
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{ |
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int arg_opt; |
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char *tokptr = strtok(options, ", \t\n"); |
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while (tokptr) { |
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arg_opt = no_argument; |
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if (strlen(tokptr) > 0) { |
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if (tokptr[strlen(tokptr) - 1] == ':') { |
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if (tokptr[strlen(tokptr) - 2] == ':') { |
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tokptr[strlen(tokptr) - 2] = '\0'; |
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arg_opt = optional_argument; |
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} else { |
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tokptr[strlen(tokptr) - 1] = '\0'; |
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arg_opt = required_argument; |
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} |
| 299 |
if (strlen(tokptr) == 0) |
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parse_error(_ |
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("empty long option after " |
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"-l or --long argument")); |
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} |
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add_longopt(tokptr, arg_opt); |
| 305 |
} |
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tokptr = strtok(NULL, ", \t\n"); |
| 307 |
} |
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} |
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|
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static void set_shell(const char *new_shell) |
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{ |
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if (!strcmp(new_shell, "bash")) |
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shell = BASH; |
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else if (!strcmp(new_shell, "tcsh")) |
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shell = TCSH; |
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else if (!strcmp(new_shell, "sh")) |
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shell = BASH; |
| 318 |
else if (!strcmp(new_shell, "csh")) |
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shell = TCSH; |
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else |
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parse_error(_ |
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("unknown shell after -s or --shell argument")); |
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} |
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|
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static void __attribute__ ((__noreturn__)) print_help(void) |
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{ |
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fputs(USAGE_HEADER, stderr); |
| 328 |
fprintf(stderr, _( |
| 329 |
" %1$s optstring parameters\n" |
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" %1$s [options] [--] optstring parameters\n" |
| 331 |
" %1$s [options] -o|--options optstring [options] [--] parameters\n"), |
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program_invocation_short_name); |
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|
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fputs(USAGE_OPTIONS, stderr); |
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fputs(_(" -a, --alternative Allow long options starting with single -\n"), stderr); |
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fputs(_(" -l, --longoptions <longopts> Long options to be recognized\n"), stderr); |
| 337 |
fputs(_(" -n, --name <progname> The name under which errors are reported\n"), stderr); |
| 338 |
fputs(_(" -o, --options <optstring> Short options to be recognized\n"), stderr); |
| 339 |
fputs(_(" -q, --quiet Disable error reporting by getopt(3)\n"), stderr); |
| 340 |
fputs(_(" -Q, --quiet-output No normal output\n"), stderr); |
| 341 |
fputs(_(" -s, --shell <shell> Set shell quoting conventions\n"), stderr); |
| 342 |
fputs(_(" -T, --test Test for getopt(1) version\n"), stderr); |
| 343 |
fputs(_(" -u, --unquoted Do not quote the output\n"), stderr); |
| 344 |
fputs(USAGE_SEPARATOR, stderr); |
| 345 |
fputs(USAGE_HELP, stderr); |
| 346 |
fputs(USAGE_VERSION, stderr); |
| 347 |
fprintf(stderr, USAGE_MAN_TAIL("getopt(1)")); |
| 348 |
exit(PARAMETER_EXIT_CODE); |
| 349 |
} |
| 350 |
|
| 351 |
int main(int argc, char *argv[]) |
| 352 |
{ |
| 353 |
char *optstr = NULL; |
| 354 |
char *name = NULL; |
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int opt; |
| 356 |
int compatible = 0; |
| 357 |
|
| 358 |
/* Stop scanning as soon as a non-option argument is found! */ |
| 359 |
static const char *shortopts = "+ao:l:n:qQs:TuhV"; |
| 360 |
static const struct option longopts[] = { |
| 361 |
{"options", required_argument, NULL, 'o'}, |
| 362 |
{"longoptions", required_argument, NULL, 'l'}, |
| 363 |
{"quiet", no_argument, NULL, 'q'}, |
| 364 |
{"quiet-output", no_argument, NULL, 'Q'}, |
| 365 |
{"shell", required_argument, NULL, 's'}, |
| 366 |
{"test", no_argument, NULL, 'T'}, |
| 367 |
{"unquoted", no_argument, NULL, 'u'}, |
| 368 |
{"help", no_argument, NULL, 'h'}, |
| 369 |
{"alternative", no_argument, NULL, 'a'}, |
| 370 |
{"name", required_argument, NULL, 'n'}, |
| 371 |
{"version", no_argument, NULL, 'V'}, |
| 372 |
{NULL, 0, NULL, 0} |
| 373 |
}; |
| 374 |
|
| 375 |
setlocale(LC_ALL, ""); |
| 376 |
bindtextdomain(PACKAGE, LOCALEDIR); |
| 377 |
textdomain(PACKAGE); |
| 378 |
|
| 379 |
init_longopt(); |
| 380 |
getopt_long_fp = getopt_long; |
| 381 |
|
| 382 |
if (getenv("GETOPT_COMPATIBLE")) |
| 383 |
compatible = 1; |
| 384 |
|
| 385 |
if (argc == 1) { |
| 386 |
if (compatible) { |
| 387 |
/* |
| 388 |
* For some reason, the original getopt gave no |
| 389 |
* error when there were no arguments. |
| 390 |
*/ |
| 391 |
printf(" --\n"); |
| 392 |
return EXIT_SUCCESS; |
| 393 |
} else |
| 394 |
parse_error(_("missing optstring argument")); |
| 395 |
} |
| 396 |
|
| 397 |
if (argv[1][0] != '-' || compatible) { |
| 398 |
quote = 0; |
| 399 |
optstr = xmalloc(strlen(argv[1]) + 1); |
| 400 |
strcpy(optstr, argv[1] + strspn(argv[1], "-+")); |
| 401 |
argv[1] = argv[0]; |
| 402 |
return generate_output(argv + 1, argc - 1, optstr, |
| 403 |
long_options); |
| 404 |
} |
| 405 |
|
| 406 |
while ((opt = |
| 407 |
getopt_long(argc, argv, shortopts, longopts, NULL)) != EOF) |
| 408 |
switch (opt) { |
| 409 |
case 'a': |
| 410 |
getopt_long_fp = getopt_long_only; |
| 411 |
break; |
| 412 |
case 'h': |
| 413 |
print_help(); |
| 414 |
case 'o': |
| 415 |
free(optstr); |
| 416 |
optstr = xmalloc(strlen(optarg) + 1); |
| 417 |
strcpy(optstr, optarg); |
| 418 |
break; |
| 419 |
case 'l': |
| 420 |
add_long_options(optarg); |
| 421 |
break; |
| 422 |
case 'n': |
| 423 |
free(name); |
| 424 |
name = xmalloc(strlen(optarg) + 1); |
| 425 |
strcpy(name, optarg); |
| 426 |
break; |
| 427 |
case 'q': |
| 428 |
quiet_errors = 1; |
| 429 |
break; |
| 430 |
case 'Q': |
| 431 |
quiet_output = 1; |
| 432 |
break; |
| 433 |
case 's': |
| 434 |
set_shell(optarg); |
| 435 |
break; |
| 436 |
case 'T': |
| 437 |
return TEST_EXIT_CODE; |
| 438 |
case 'u': |
| 439 |
quote = 0; |
| 440 |
break; |
| 441 |
case 'V': |
| 442 |
printf(UTIL_LINUX_VERSION); |
| 443 |
return EXIT_SUCCESS; |
| 444 |
case '?': |
| 445 |
case ':': |
| 446 |
parse_error(NULL); |
| 447 |
default: |
| 448 |
parse_error(_("internal error, contact the author.")); |
| 449 |
} |
| 450 |
|
| 451 |
if (!optstr) { |
| 452 |
if (optind >= argc) |
| 453 |
parse_error(_("missing optstring argument")); |
| 454 |
else { |
| 455 |
optstr = xmalloc(strlen(argv[optind]) + 1); |
| 456 |
strcpy(optstr, argv[optind]); |
| 457 |
optind++; |
| 458 |
} |
| 459 |
} |
| 460 |
if (name) |
| 461 |
argv[optind - 1] = name; |
| 462 |
else |
| 463 |
argv[optind - 1] = argv[0]; |
| 464 |
|
| 465 |
return generate_output(argv + optind - 1, argc-optind + 1, |
| 466 |
optstr, long_options); |
| 467 |
} |
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