| 1 |
/* |
| 2 |
getopt.c - Enhanced implementation of BSD getopt(1) |
| 3 |
Copyright (c) 1997-2005 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 |
| 8 |
(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 |
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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 |
| 16 |
along with this program; if not, write to the Free Software |
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, 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 Mi<B6>kiewicz |
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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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*/ |
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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 "nls.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 2 |
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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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shell_t shell=BASH; /* The shell we generate output for. */ |
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int quiet_errors=0; /* 0 is not quiet. */ |
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int quiet_output=0; /* 0 is not quiet. */ |
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int quote=1; /* 1 is do quote. */ |
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int alternative=0; /* 0 is getopt_long, 1 is getopt_long_only */ |
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|
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/* Function prototypes */ |
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void *our_malloc(size_t size); |
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void *our_realloc(void *ptr, size_t size); |
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const char *normalize(const char *arg); |
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int generate_output(char * argv[],int argc,const char *optstr, |
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const struct option *longopts); |
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int main(int argc, char *argv[]); |
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void parse_error(const char *message); |
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void add_long_options(char *options); |
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void add_longopt(const char *name,int has_arg); |
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void print_help(void); |
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void set_shell(const char *new_shell); |
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void set_initial_shell(void); |
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|
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void *our_malloc(size_t size) |
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{ |
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void *ret=malloc(size); |
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if (! ret) { |
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fprintf(stderr,_("%s: Out of memory!\n"),"getopt"); |
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exit(3); |
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} |
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return(ret); |
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} |
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|
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void *our_realloc(void *ptr, size_t size) |
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{ |
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void *ret=realloc(ptr,size); |
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if (! ret && size) { |
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fprintf(stderr,_("%s: Out of memory!\n"),"getopt"); |
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exit(3); |
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} |
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return(ret); |
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} |
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|
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/* |
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* This function 'normalizes' a single argument: it puts single quotes around |
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* it and escapes other special characters. If quote is false, it just |
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* returns its argument. |
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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. |
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* This function returns a pointer to a buffer that is overwritten by |
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* each call. |
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*/ |
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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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if (BUFFER != NULL) |
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free(BUFFER); |
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|
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if (!quote) { /* Just copy arg */ |
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BUFFER=our_malloc(strlen(arg)+1); |
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|
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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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/* Each character in arg may take upto four characters in the result: |
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For a quote we need a closing quote, a backslash, a quote and an |
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opening quote! We need also the global opening and closing quote, |
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and one extra character for '\0'. */ |
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BUFFER=our_malloc(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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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 = 0; /* We 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) /* No error reporting from getopt(3) */ |
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opterr=0; |
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optind=0; /* Reset getopt(3) */ |
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|
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while ((opt = (alternative? |
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getopt_long_only(argc,argv,optstr,longopts,&longindex): |
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getopt_long(argc,argv,optstr,longopts,&longindex))) |
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!= EOF) |
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if (opt == '?' || opt == ':' ) |
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exit_code = 1; |
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else if (!quiet_output) |
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{ |
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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", |
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normalize(optarg?optarg:"")); |
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} else if (opt == NON_OPT) |
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printf(" %s",normalize(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", |
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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. |
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* If message is NULL, we already sent a message, we just exit with a helpful |
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* hint. |
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*/ |
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void parse_error(const char *message) |
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{ |
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if (message) |
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fprintf(stderr,"getopt: %s\n",message); |
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fputs(_("Try `getopt --help' for more information.\n"),stderr); |
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exit(2); |
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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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void add_longopt(const char *name,int has_arg) |
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{ |
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char *tmp; |
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if (!name) { /* 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=our_realloc(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) { /* 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=NULL; |
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long_options[long_options_nr-1].val=LONG_OPT; |
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tmp = our_malloc(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. |
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* This nukes options! |
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*/ |
| 285 |
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"); |
| 289 |
while (tokptr) { |
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arg_opt=no_argument; |
| 291 |
if (strlen(tokptr) > 0) { |
| 292 |
if (tokptr[strlen(tokptr)-1] == ':') { |
| 293 |
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'; |
| 298 |
arg_opt=required_argument; |
| 299 |
} |
| 300 |
if (strlen(tokptr) == 0) |
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parse_error(_("empty long option after " |
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"-l or --long argument")); |
| 303 |
} |
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add_longopt(tokptr,arg_opt); |
| 305 |
} |
| 306 |
tokptr=strtok(NULL,", \t\n"); |
| 307 |
} |
| 308 |
} |
| 309 |
|
| 310 |
void set_shell(const char *new_shell) |
| 311 |
{ |
| 312 |
if (!strcmp(new_shell,"bash")) |
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shell=BASH; |
| 314 |
else if (!strcmp(new_shell,"tcsh")) |
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shell=TCSH; |
| 316 |
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(_("unknown shell after -s or --shell argument")); |
| 322 |
} |
| 323 |
|
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void print_help(void) |
| 325 |
{ |
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fputs(_("Usage: getopt optstring parameters\n"),stderr); |
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fputs(_(" getopt [options] [--] optstring parameters\n"),stderr); |
| 328 |
fputs(_(" getopt [options] -o|--options optstring [options] [--]\n"),stderr); |
| 329 |
fputs(_(" parameters\n"),stderr); |
| 330 |
fputs(_(" -a, --alternative Allow long options starting with single -\n"),stderr); |
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fputs(_(" -h, --help This small usage guide\n"),stderr); |
| 332 |
fputs(_(" -l, --longoptions=longopts Long options to be recognized\n"),stderr); |
| 333 |
fputs(_(" -n, --name=progname The name under which errors are reported\n"),stderr); |
| 334 |
fputs(_(" -o, --options=optstring Short options to be recognized\n"),stderr); |
| 335 |
fputs(_(" -q, --quiet Disable error reporting by getopt(3)\n"),stderr); |
| 336 |
fputs(_(" -Q, --quiet-output No normal output\n"),stderr); |
| 337 |
fputs(_(" -s, --shell=shell Set shell quoting conventions\n"),stderr); |
| 338 |
fputs(_(" -T, --test Test for getopt(1) version\n"),stderr); |
| 339 |
fputs(_(" -u, --unqote Do not quote the output\n"),stderr); |
| 340 |
fputs(_(" -V, --version Output version information\n"),stderr); |
| 341 |
exit(2); |
| 342 |
} |
| 343 |
|
| 344 |
/* Exit codes: |
| 345 |
* 0) No errors, succesful operation. |
| 346 |
* 1) getopt(3) returned an error. |
| 347 |
* 2) A problem with parameter parsing for getopt(1). |
| 348 |
* 3) Internal error, out of memory |
| 349 |
* 4) Returned for -T |
| 350 |
*/ |
| 351 |
|
| 352 |
static struct option longopts[]={ {"options",required_argument,NULL,'o'}, |
| 353 |
{"longoptions",required_argument,NULL,'l'}, |
| 354 |
{"quiet",no_argument,NULL,'q'}, |
| 355 |
{"quiet-output",no_argument,NULL,'Q'}, |
| 356 |
{"shell",required_argument,NULL,'s'}, |
| 357 |
{"test",no_argument,NULL,'T'}, |
| 358 |
{"unquoted",no_argument,NULL,'u'}, |
| 359 |
{"help",no_argument,NULL,'h'}, |
| 360 |
{"alternative",no_argument,NULL,'a'}, |
| 361 |
{"name",required_argument,NULL,'n'}, |
| 362 |
{"version",no_argument,NULL,'V'}, |
| 363 |
{NULL,0,NULL,0} |
| 364 |
}; |
| 365 |
|
| 366 |
/* Stop scanning as soon as a non-option argument is found! */ |
| 367 |
static const char *shortopts="+ao:l:n:qQs:TuhV"; |
| 368 |
|
| 369 |
int main(int argc, char *argv[]) |
| 370 |
{ |
| 371 |
char *optstr=NULL; |
| 372 |
char *name=NULL; |
| 373 |
int opt; |
| 374 |
int compatible=0; |
| 375 |
|
| 376 |
#if WITHOUT_GETTEXT |
| 377 |
#else |
| 378 |
setlocale(LC_ALL,""); |
| 379 |
bindtextdomain(PACKAGE, LOCALEDIR); |
| 380 |
textdomain(PACKAGE); |
| 381 |
#endif |
| 382 |
|
| 383 |
init_longopt(); |
| 384 |
|
| 385 |
if (getenv("GETOPT_COMPATIBLE")) |
| 386 |
compatible=1; |
| 387 |
|
| 388 |
if (argc == 1) |
| 389 |
{ |
| 390 |
if (compatible) { |
| 391 |
/* For some reason, the original getopt gave no error |
| 392 |
when there were no arguments. */ |
| 393 |
printf(" --\n"); |
| 394 |
exit(0); |
| 395 |
} |
| 396 |
else |
| 397 |
parse_error(_("missing optstring argument")); |
| 398 |
} |
| 399 |
|
| 400 |
if (argv[1][0] != '-' || compatible) { |
| 401 |
quote=0; |
| 402 |
optstr=our_malloc(strlen(argv[1])+1); |
| 403 |
strcpy(optstr,argv[1]+strspn(argv[1],"-+")); |
| 404 |
argv[1]=argv[0]; |
| 405 |
exit(generate_output(argv+1,argc-1,optstr,long_options)); |
| 406 |
} |
| 407 |
|
| 408 |
while ((opt=getopt_long(argc,argv,shortopts,longopts,NULL)) != EOF) |
| 409 |
switch (opt) { |
| 410 |
case 'a': |
| 411 |
alternative=1; |
| 412 |
break; |
| 413 |
case 'h': |
| 414 |
print_help(); |
| 415 |
exit(0); |
| 416 |
case 'o': |
| 417 |
if (optstr) |
| 418 |
free(optstr); |
| 419 |
optstr=our_malloc(strlen(optarg)+1); |
| 420 |
strcpy(optstr,optarg); |
| 421 |
break; |
| 422 |
case 'l': |
| 423 |
add_long_options(optarg); |
| 424 |
break; |
| 425 |
case 'n': |
| 426 |
if (name) |
| 427 |
free(name); |
| 428 |
name=our_malloc(strlen(optarg)+1); |
| 429 |
strcpy(name,optarg); |
| 430 |
break; |
| 431 |
case 'q': |
| 432 |
quiet_errors=1; |
| 433 |
break; |
| 434 |
case 'Q': |
| 435 |
quiet_output=1; |
| 436 |
break; |
| 437 |
case 's': |
| 438 |
set_shell(optarg); |
| 439 |
break; |
| 440 |
case 'T': |
| 441 |
exit(4); |
| 442 |
case 'u': |
| 443 |
quote=0; |
| 444 |
break; |
| 445 |
case 'V': |
| 446 |
printf(_("getopt (enhanced) 1.1.4\n")); |
| 447 |
exit(0); |
| 448 |
case '?': |
| 449 |
case ':': |
| 450 |
parse_error(NULL); |
| 451 |
default: |
| 452 |
parse_error(_("internal error, contact the author.")); |
| 453 |
} |
| 454 |
|
| 455 |
if (!optstr) |
| 456 |
{ |
| 457 |
if (optind >= argc) |
| 458 |
parse_error(_("missing optstring argument")); |
| 459 |
else { |
| 460 |
optstr=our_malloc(strlen(argv[optind])+1); |
| 461 |
strcpy(optstr,argv[optind]); |
| 462 |
optind++; |
| 463 |
} |
| 464 |
} |
| 465 |
if (name) |
| 466 |
argv[optind-1]=name; |
| 467 |
else |
| 468 |
argv[optind-1]=argv[0]; |
| 469 |
exit(generate_output(argv+optind-1,argc-optind+1,optstr,long_options)); |
| 470 |
} |
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