| /* |
| * getopt.c - Enhanced implementation of BSD getopt(1) |
| * Copyright (c) 1997, 1998, 1999, 2000 Frodo Looijaard <frodol@dds.nl> |
| * |
| * This program 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 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program 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 this program; if not, write to the Free Software |
| * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| */ |
| |
| /* |
| * Version 1.0-b4: Tue Sep 23 1997. First public release. |
| * Version 1.0: Wed Nov 19 1997. |
| * Bumped up the version number to 1.0 |
| * Fixed minor typo (CSH instead of TCSH) |
| * Version 1.0.1: Tue Jun 3 1998 |
| * Fixed sizeof instead of strlen bug |
| * Bumped up the version number to 1.0.1 |
| * Version 1.0.2: Thu Jun 11 1998 (not present) |
| * Fixed gcc-2.8.1 warnings |
| * Fixed --version/-V option (not present) |
| * Version 1.0.5: Tue Jun 22 1999 |
| * Make -u option work (not present) |
| * Version 1.0.6: Tue Jun 27 2000 |
| * No important changes |
| * Version 1.1.0: Tue Jun 30 2000 |
| * Added NLS support (partly written by Arkadiusz Mi<B6>kiewicz |
| * <misiek@misiek.eu.org>) |
| * Ported to Busybox - Alfred M. Szmidt <ams@trillian.itslinux.org> |
| * Removed --version/-V and --help/-h in |
| * Removed prase_error(), using error_msg() from Busybox instead |
| * Replaced our_malloc with xmalloc and our_realloc with xrealloc |
| * |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <unistd.h> |
| #include <ctype.h> |
| #include <getopt.h> |
| |
| #include "busybox.h" |
| |
| /* NON_OPT is the code that is returned when a non-option is found in '+' |
| mode */ |
| static const int NON_OPT = 1; |
| /* LONG_OPT is the code that is returned when a long option is found. */ |
| static const int LONG_OPT = 2; |
| |
| /* The shells recognized. */ |
| typedef enum {BASH,TCSH} shell_t; |
| |
| |
| /* Some global variables that tells us how to parse. */ |
| static shell_t shell=BASH; /* The shell we generate output for. */ |
| static int quiet_errors=0; /* 0 is not quiet. */ |
| static int quiet_output=0; /* 0 is not quiet. */ |
| static int quote=1; /* 1 is do quote. */ |
| static int alternative=0; /* 0 is getopt_long, 1 is getopt_long_only */ |
| |
| /* Function prototypes */ |
| static const char *normalize(const char *arg); |
| static int generate_output(char * argv[],int argc,const char *optstr, |
| const struct option *longopts); |
| static void add_long_options(char *options); |
| static void add_longopt(const char *name,int has_arg); |
| static void set_shell(const char *new_shell); |
| |
| |
| /* |
| * This function 'normalizes' a single argument: it puts single quotes around |
| * it and escapes other special characters. If quote is false, it just |
| * returns its argument. |
| * Bash only needs special treatment for single quotes; tcsh also recognizes |
| * exclamation marks within single quotes, and nukes whitespace. |
| * This function returns a pointer to a buffer that is overwritten by |
| * each call. |
| */ |
| const char *normalize(const char *arg) |
| { |
| static char *BUFFER=NULL; |
| const char *argptr=arg; |
| char *bufptr; |
| |
| if (BUFFER != NULL) |
| free(BUFFER); |
| |
| if (!quote) { /* Just copy arg */ |
| BUFFER=xstrdup(arg); |
| return BUFFER; |
| } |
| |
| /* Each character in arg may take upto four characters in the result: |
| For a quote we need a closing quote, a backslash, a quote and an |
| opening quote! We need also the global opening and closing quote, |
| and one extra character for '\0'. */ |
| BUFFER=xmalloc(strlen(arg)*4+3); |
| |
| bufptr=BUFFER; |
| *bufptr++='\''; |
| |
| while (*argptr) { |
| if (*argptr == '\'') { |
| /* Quote: replace it with: '\'' */ |
| *bufptr++='\''; |
| *bufptr++='\\'; |
| *bufptr++='\''; |
| *bufptr++='\''; |
| } else if (shell==TCSH && *argptr=='!') { |
| /* Exclamation mark: replace it with: \! */ |
| *bufptr++='\''; |
| *bufptr++='\\'; |
| *bufptr++='!'; |
| *bufptr++='\''; |
| } else if (shell==TCSH && *argptr=='\n') { |
| /* Newline: replace it with: \n */ |
| *bufptr++='\\'; |
| *bufptr++='n'; |
| } else if (shell==TCSH && isspace(*argptr)) { |
| /* Non-newline whitespace: replace it with \<ws> */ |
| *bufptr++='\''; |
| *bufptr++='\\'; |
| *bufptr++=*argptr; |
| *bufptr++='\''; |
| } else |
| /* Just copy */ |
| *bufptr++=*argptr; |
| argptr++; |
| } |
| *bufptr++='\''; |
| *bufptr++='\0'; |
| return BUFFER; |
| } |
| |
| /* |
| * Generate the output. argv[0] is the program name (used for reporting errors). |
| * argv[1..] contains the options to be parsed. argc must be the number of |
| * elements in argv (ie. 1 if there are no options, only the program name), |
| * optstr must contain the short options, and longopts the long options. |
| * Other settings are found in global variables. |
| */ |
| int generate_output(char * argv[],int argc,const char *optstr, |
| const struct option *longopts) |
| { |
| int exit_code = 0; /* We assume everything will be OK */ |
| int opt; |
| int longindex; |
| const char *charptr; |
| |
| if (quiet_errors) /* No error reporting from getopt(3) */ |
| opterr=0; |
| optind=0; /* Reset getopt(3) */ |
| |
| while ((opt = (alternative? |
| getopt_long_only(argc,argv,optstr,longopts,&longindex): |
| getopt_long(argc,argv,optstr,longopts,&longindex))) |
| != EOF) |
| if (opt == '?' || opt == ':' ) |
| exit_code = 1; |
| else if (!quiet_output) { |
| if (opt == LONG_OPT) { |
| printf(" --%s",longopts[longindex].name); |
| if (longopts[longindex].has_arg) |
| printf(" %s", |
| normalize(optarg?optarg:"")); |
| } else if (opt == NON_OPT) |
| printf(" %s",normalize(optarg)); |
| else { |
| printf(" -%c",opt); |
| charptr = strchr(optstr,opt); |
| if (charptr != NULL && *++charptr == ':') |
| printf(" %s", |
| normalize(optarg?optarg:"")); |
| } |
| } |
| |
| if (! quiet_output) { |
| printf(" --"); |
| while (optind < argc) |
| printf(" %s",normalize(argv[optind++])); |
| printf("\n"); |
| } |
| return exit_code; |
| } |
| |
| static struct option *long_options=NULL; |
| static int long_options_length=0; /* Length of array */ |
| static int long_options_nr=0; /* Nr of used elements in array */ |
| static const int LONG_OPTIONS_INCR = 10; |
| #define init_longopt() add_longopt(NULL,0) |
| |
| /* Register a long option. The contents of name is copied. */ |
| void add_longopt(const char *name,int has_arg) |
| { |
| if (!name) { /* init */ |
| free(long_options); |
| long_options=NULL; |
| long_options_length=0; |
| long_options_nr=0; |
| } |
| |
| if (long_options_nr == long_options_length) { |
| long_options_length += LONG_OPTIONS_INCR; |
| long_options=xrealloc(long_options, |
| sizeof(struct option) * |
| long_options_length); |
| } |
| |
| long_options[long_options_nr].name=NULL; |
| long_options[long_options_nr].has_arg=0; |
| long_options[long_options_nr].flag=NULL; |
| long_options[long_options_nr].val=0; |
| |
| if (long_options_nr) { /* Not for init! */ |
| long_options[long_options_nr-1].has_arg=has_arg; |
| long_options[long_options_nr-1].flag=NULL; |
| long_options[long_options_nr-1].val=LONG_OPT; |
| long_options[long_options_nr-1].name=xstrdup(name); |
| } |
| long_options_nr++; |
| } |
| |
| |
| /* |
| * Register several long options. options is a string of long options, |
| * separated by commas or whitespace. |
| * This nukes options! |
| */ |
| void add_long_options(char *options) |
| { |
| int arg_opt, tlen; |
| char *tokptr=strtok(options,", \t\n"); |
| while (tokptr) { |
| arg_opt=no_argument; |
| tlen=strlen(tokptr); |
| if (tlen > 0) { |
| if (tokptr[tlen-1] == ':') { |
| if (tlen > 1 && tokptr[tlen-2] == ':') { |
| tokptr[tlen-2]='\0'; |
| tlen -= 2; |
| arg_opt=optional_argument; |
| } else { |
| tokptr[tlen-1]='\0'; |
| tlen -= 1; |
| arg_opt=required_argument; |
| } |
| if (tlen == 0) |
| error_msg("empty long option after -l or --long argument"); |
| } |
| add_longopt(tokptr,arg_opt); |
| } |
| tokptr=strtok(NULL,", \t\n"); |
| } |
| } |
| |
| void set_shell(const char *new_shell) |
| { |
| if (!strcmp(new_shell,"bash")) |
| shell=BASH; |
| else if (!strcmp(new_shell,"tcsh")) |
| shell=TCSH; |
| else if (!strcmp(new_shell,"sh")) |
| shell=BASH; |
| else if (!strcmp(new_shell,"csh")) |
| shell=TCSH; |
| else |
| error_msg("unknown shell after -s or --shell argument"); |
| } |
| |
| |
| /* Exit codes: |
| * 0) No errors, succesful operation. |
| * 1) getopt(3) returned an error. |
| * 2) A problem with parameter parsing for getopt(1). |
| * 3) Internal error, out of memory |
| * 4) Returned for -T |
| */ |
| |
| static struct option longopts[]= |
| { |
| {"options",required_argument,NULL,'o'}, |
| {"longoptions",required_argument,NULL,'l'}, |
| {"quiet",no_argument,NULL,'q'}, |
| {"quiet-output",no_argument,NULL,'Q'}, |
| {"shell",required_argument,NULL,'s'}, |
| {"test",no_argument,NULL,'T'}, |
| {"unquoted",no_argument,NULL,'u'}, |
| {"alternative",no_argument,NULL,'a'}, |
| {"name",required_argument,NULL,'n'}, |
| {NULL,0,NULL,0} |
| }; |
| |
| /* Stop scanning as soon as a non-option argument is found! */ |
| static const char *shortopts="+ao:l:n:qQs:Tu"; |
| |
| |
| int getopt_main(int argc, char *argv[]) |
| { |
| char *optstr=NULL; |
| char *name=NULL; |
| int opt; |
| int compatible=0; |
| |
| init_longopt(); |
| |
| if (getenv("GETOPT_COMPATIBLE")) |
| compatible=1; |
| |
| if (argc == 1) { |
| if (compatible) { |
| /* For some reason, the original getopt gave no error |
| when there were no arguments. */ |
| printf(" --\n"); |
| return 0; |
| } else |
| error_msg_and_die("missing optstring argument"); |
| } |
| |
| if (argv[1][0] != '-' || compatible) { |
| quote=0; |
| optstr=xmalloc(strlen(argv[1])+1); |
| strcpy(optstr,argv[1]+strspn(argv[1],"-+")); |
| argv[1]=argv[0]; |
| return (generate_output(argv+1,argc-1,optstr,long_options)); |
| } |
| |
| while ((opt=getopt_long(argc,argv,shortopts,longopts,NULL)) != EOF) |
| switch (opt) { |
| case 'a': |
| alternative=1; |
| break; |
| case 'o': |
| if (optstr) |
| free(optstr); |
| optstr=xstrdup(optarg); |
| break; |
| case 'l': |
| add_long_options(optarg); |
| break; |
| case 'n': |
| if (name) |
| free(name); |
| name=xstrdup(optarg); |
| break; |
| case 'q': |
| quiet_errors=1; |
| break; |
| case 'Q': |
| quiet_output=1; |
| break; |
| case 's': |
| set_shell(optarg); |
| break; |
| case 'T': |
| return 4; |
| case 'u': |
| quote=0; |
| break; |
| default: |
| show_usage(); |
| } |
| |
| if (!optstr) { |
| if (optind >= argc) |
| error_msg_and_die("missing optstring argument"); |
| else { |
| optstr=xstrdup(argv[optind]); |
| optind++; |
| } |
| } |
| if (name) |
| argv[optind-1]=name; |
| else |
| argv[optind-1]=argv[0]; |
| return (generate_output(argv+optind-1,argc-optind+1,optstr,long_options)); |
| } |
| |
| /* |
| Local Variables: |
| c-file-style: "linux" |
| c-basic-offset: 4 |
| tab-width: 4 |
| End: |
| */ |