diff options
| -rw-r--r-- | applets/busybox.c | 3 | ||||
| -rw-r--r-- | busybox.c | 3 | ||||
| -rw-r--r-- | busybox.def.h | 1 | ||||
| -rw-r--r-- | docs/busybox.pod | 46 | ||||
| -rw-r--r-- | docs/busybox.sgml | 55 | ||||
| -rw-r--r-- | getopt.c | 416 | ||||
| -rw-r--r-- | internal.h | 1 | ||||
| -rw-r--r-- | util-linux/getopt.c | 416 |
8 files changed, 939 insertions, 2 deletions
diff --git a/applets/busybox.c b/applets/busybox.c index 5d13a7b98..d93fc5185 100644 --- a/applets/busybox.c +++ b/applets/busybox.c @@ -100,6 +100,9 @@ const struct BB_applet applets[] = { #ifdef BB_FSCK_MINIX {"fsck.minix", fsck_minix_main, _BB_DIR_SBIN, fsck_minix_usage}, #endif +#ifdef BB_GETOPT + {"getopt", getopt_main, _BB_DIR_BIN}, +#endif #ifdef BB_GREP {"grep", grep_main, _BB_DIR_BIN, grep_usage}, #endif @@ -100,6 +100,9 @@ const struct BB_applet applets[] = { #ifdef BB_FSCK_MINIX {"fsck.minix", fsck_minix_main, _BB_DIR_SBIN, fsck_minix_usage}, #endif +#ifdef BB_GETOPT + {"getopt", getopt_main, _BB_DIR_BIN}, +#endif #ifdef BB_GREP {"grep", grep_main, _BB_DIR_BIN, grep_usage}, #endif diff --git a/busybox.def.h b/busybox.def.h index fd4302a84..692c7213f 100644 --- a/busybox.def.h +++ b/busybox.def.h @@ -33,6 +33,7 @@ #define BB_FREE #define BB_FREERAMDISK #define BB_FSCK_MINIX +#define BB_GETOPT #define BB_GREP #define BB_GUNZIP #define BB_GZIP diff --git a/docs/busybox.pod b/docs/busybox.pod index 916ccb6f0..4fba7eafa 100644 --- a/docs/busybox.pod +++ b/docs/busybox.pod @@ -57,7 +57,7 @@ Currently defined functions include: ar, basename, cat, chgrp, chmod, chown, chroot, chvt, clear, cp, cut, date, dc, dd, deallocvt, df, dirname, dmesg, du, dumpkmap, dutmp, echo, false, fbset, -fdflush, find, free, freeramdisk, fsck.minix, grep, gunzip, gzip, halt, +fdflush, find, free, freeramdisk, fsck.minix, getopt, grep, gunzip, gzip, halt, head, hostid, hostname, id, init, insmod, kill, killall, length, ln, loadacm, loadfont, loadkmap, logger, logname, ls, lsmod, makedevs, mkdir, mkfifo, mkfs.minix, mknod, mkswap, mktemp, more, mount, mt, mv, nc, @@ -614,6 +614,48 @@ Options: ------------------------------- +=item getopt + +Usage: getopt [OPTIONS]... + +Parse command options + +Options: + + -a, --alternative Allow long options starting with single -\n" + -l, --longoptions=longopts Long options to be recognized\n" + -n, --name=progname The name under which errors are reported\n" + -o, --options=optstring Short options to be recognized\n" + -q, --quiet Disable error reporting by getopt(3)\n" + -Q, --quiet-output No normal output\n" + -s, --shell=shell Set shell quoting conventions\n" + -T, --test Test for getopt(1) version\n" + -u, --unqote Do not quote the output\n" + +Example: + $ cat getopt.test + #!/bin/sh + GETOPT=`getopt -o ab:c:: --long a-long,b-long:,c-long:: \ + -n 'example.busybox' -- "$@"` + if [ $? != 0 ] ; then exit 1 ; fi + eval set -- "$GETOPT" + while true ; do + case $1 in + -a|--a-long) echo "Option a" ; shift ;; + -b|--b-long) echo "Option b, argument \`$2'" ; shift 2 ;; + -c|--c-long) + case "$2" in + "") echo "Option c, no argument"; shift 2 ;; + *) echo "Option c, argument \`$2'" ; shift 2 ;; + esac ;; + --) shift ; break ;; + *) echo "Internal error!" ; exit 1 ;; + esac + done + + +------------------------------- + =item grep Usage: grep [OPTIONS]... PATTERN [FILE]... @@ -2052,4 +2094,4 @@ Enrique Zanardi <ezanardi@ull.es> =cut -# $Id: busybox.pod,v 1.61 2000/08/21 21:18:52 andersen Exp $ +# $Id: busybox.pod,v 1.62 2000/08/21 22:02:34 andersen Exp $ diff --git a/docs/busybox.sgml b/docs/busybox.sgml index 864dbe0ac..f53be8d6f 100644 --- a/docs/busybox.sgml +++ b/docs/busybox.sgml @@ -1063,6 +1063,61 @@ </screen> </para> </sect1> + + <sect1 id="getopt"> + <title>getopt</title> + + <para> + Usage: getopt [OPTIONS]... + </para> + + <para> + Parse command options + </para> + + <para> + <screen> + -a, --alternative Allow long options starting with single -\n" + -l, --longoptions=longopts Long options to be recognized\n" + -n, --name=progname The name under which errors are reported\n" + -o, --options=optstring Short options to be recognized\n" + -q, --quiet Disable error reporting by getopt(3)\n" + -Q, --quiet-output No normal output\n" + -s, --shell=shell Set shell quoting conventions\n" + -T, --test Test for getopt(1) version\n" + -u, --unqote Do not quote the output\n" + </screen> + </para> + + + <para> + Example: + </para> + + <para> + <screen> + $ cat getopt.test + #!/bin/sh + GETOPT=`getopt -o ab:c:: --long a-long,b-long:,c-long:: \ + -n 'example.busybox' -- "$@"` + if [ $? != 0 ] ; then exit 1 ; fi + eval set -- "$GETOPT" + while true ; do + case $1 in + -a|--a-long) echo "Option a" ; shift ;; + -b|--b-long) echo "Option b, argument \`$2'" ; shift 2 ;; + -c|--c-long) + case "$2" in + "") echo "Option c, no argument"; shift 2 ;; + *) echo "Option c, argument \`$2'" ; shift 2 ;; + esac ;; + --) shift ; break ;; + *) echo "Internal error!" ; exit 1 ;; + esac + done + </screen> + </para> + </sect1> <sect1 id="grep"> <title>grep</title> diff --git a/getopt.c b/getopt.c new file mode 100644 index 000000000..fb75790d9 --- /dev/null +++ b/getopt.c @@ -0,0 +1,416 @@ +/* + * 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 errorMsg() 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 "internal.h" + +/* NON_OPT is the code that is returned when a non-option is found in '+' + mode */ +#define NON_OPT 1 +/* LONG_OPT is the code that is returned when a long option is found. */ +#define LONG_OPT 2 + +/* The shells recognized. */ +typedef enum {BASH,TCSH} shell_t; + + +/* Some global variables that tells us how to parse. */ +shell_t shell=BASH; /* The shell we generate output for. */ +int quiet_errors=0; /* 0 is not quiet. */ +int quiet_output=0; /* 0 is not quiet. */ +int quote=1; /* 1 is do quote. */ +int alternative=0; /* 0 is getopt_long, 1 is getopt_long_only */ + +/* Function prototypes */ +const char *normalize(const char *arg); +int generate_output(char * argv[],int argc,const char *optstr, + const struct option *longopts); +void add_long_options(char *options); +void add_longopt(const char *name,int has_arg); +void set_shell(const char *new_shell); +void set_initial_shell(void); + + +/* + * 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=xmalloc(strlen(arg)+1); + + strcpy(BUFFER,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 */ +#define 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) +{ + char *tmp; + 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; + tmp = xmalloc(strlen(name)+1); + strcpy(tmp,name); + long_options[long_options_nr-1].name=tmp; + } + 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; + char *tokptr=strtok(options,", \t\n"); + while (tokptr) { + arg_opt=no_argument; + if (strlen(tokptr) > 0) { + if (tokptr[strlen(tokptr)-1] == ':') { + if (tokptr[strlen(tokptr)-2] == ':') { + tokptr[strlen(tokptr)-2]='\0'; + arg_opt=optional_argument; + } else { + tokptr[strlen(tokptr)-1]='\0'; + arg_opt=required_argument; + } + if (strlen(tokptr) == 0) + errorMsg("empty long option after -l or --long argument\n"); + } + 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 + errorMsg("unknown shell after -s or --shell argument\n"); +} + + +/* 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"; + +static const char getopt_usage[] = +"getopt [OPTIONS]...\n" +#ifndef BB_FEATURE_TRIVIAL_HELP +"Parse command options\n" +" -a, --alternative Allow long options starting with single -\n" +" -l, --longoptions=longopts Long options to be recognized\n" +" -n, --name=progname The name under which errors are reported\n" +" -o, --options=optstring Short options to be recognized\n" +" -q, --quiet Disable error reporting by getopt(3)\n" +" -Q, --quiet-output No normal output\n" +" -s, --shell=shell Set shell quoting conventions\n" +" -T, --test Test for getopt(1) version\n" +" -u, --unqote Do not quote the output\n" +#endif +; + + +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"); + exit(0); + } else + fatalError("missing optstring argument\n"); + } + + if (argv[1][0] != '-' || compatible) { + quote=0; + optstr=xmalloc(strlen(argv[1])+1); + strcpy(optstr,argv[1]+strspn(argv[1],"-+")); + argv[1]=argv[0]; + exit(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=xmalloc(strlen(optarg)+1); + strcpy(optstr,optarg); + break; + case 'l': + add_long_options(optarg); + break; + case 'n': + if (name) + free(name); + name=xmalloc(strlen(optarg)+1); + strcpy(name,optarg); + break; + case 'q': + quiet_errors=1; + break; + case 'Q': + quiet_output=1; + break; + case 's': + set_shell(optarg); + break; + case 'T': + exit(4); + case 'u': + quote=0; + break; + default: + usage(getopt_usage); + } + + if (!optstr) { + if (optind >= argc) + fatalError("missing optstring argument\n"); + else { + optstr=xmalloc(strlen(argv[optind])+1); + strcpy(optstr,argv[optind]); + optind++; + } + } + if (name) + argv[optind-1]=name; + else + argv[optind-1]=argv[0]; + exit(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: +*/ diff --git a/internal.h b/internal.h index a47274342..939384c42 100644 --- a/internal.h +++ b/internal.h @@ -137,6 +137,7 @@ extern int fsck_minix_main(int argc, char **argv); extern int find_main(int argc, char** argv); extern int free_main(int argc, char** argv); extern int freeramdisk_main(int argc, char** argv); +extern int getopt_main(int argc, char** argv); extern int grep_main(int argc, char** argv); extern int gunzip_main (int argc, char** argv); extern int gzip_main(int argc, char** argv); diff --git a/util-linux/getopt.c b/util-linux/getopt.c new file mode 100644 index 000000000..fb75790d9 --- /dev/null +++ b/util-linux/getopt.c @@ -0,0 +1,416 @@ +/* + * 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 errorMsg() 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 "internal.h" + +/* NON_OPT is the code that is returned when a non-option is found in '+' + mode */ +#define NON_OPT 1 +/* LONG_OPT is the code that is returned when a long option is found. */ +#define LONG_OPT 2 + +/* The shells recognized. */ +typedef enum {BASH,TCSH} shell_t; + + +/* Some global variables that tells us how to parse. */ +shell_t shell=BASH; /* The shell we generate output for. */ +int quiet_errors=0; /* 0 is not quiet. */ +int quiet_output=0; /* 0 is not quiet. */ +int quote=1; /* 1 is do quote. */ +int alternative=0; /* 0 is getopt_long, 1 is getopt_long_only */ + +/* Function prototypes */ +const char *normalize(const char *arg); +int generate_output(char * argv[],int argc,const char *optstr, + const struct option *longopts); +void add_long_options(char *options); +void add_longopt(const char *name,int has_arg); +void set_shell(const char *new_shell); +void set_initial_shell(void); + + +/* + * 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=xmalloc(strlen(arg)+1); + + strcpy(BUFFER,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 */ +#define 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) +{ + char *tmp; + 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; + tmp = xmalloc(strlen(name)+1); + strcpy(tmp,name); + long_options[long_options_nr-1].name=tmp; + } + 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; + char *tokptr=strtok(options,", \t\n"); + while (tokptr) { + arg_opt=no_argument; + if (strlen(tokptr) > 0) { + if (tokptr[strlen(tokptr)-1] == ':') { + if (tokptr[strlen(tokptr)-2] == ':') { + tokptr[strlen(tokptr)-2]='\0'; + arg_opt=optional_argument; + } else { + tokptr[strlen(tokptr)-1]='\0'; + arg_opt=required_argument; + } + if (strlen(tokptr) == 0) + errorMsg("empty long option after -l or --long argument\n"); + } + 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 + errorMsg("unknown shell after -s or --shell argument\n"); +} + + +/* 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"; + +static const char getopt_usage[] = +"getopt [OPTIONS]...\n" +#ifndef BB_FEATURE_TRIVIAL_HELP +"Parse command options\n" +" -a, --alternative Allow long options starting with single -\n" +" -l, --longoptions=longopts Long options to be recognized\n" +" -n, --name=progname The name under which errors are reported\n" +" -o, --options=optstring Short options to be recognized\n" +" -q, --quiet Disable error reporting by getopt(3)\n" +" -Q, --quiet-output No normal output\n" +" -s, --shell=shell Set shell quoting conventions\n" +" -T, --test Test for getopt(1) version\n" +" -u, --unqote Do not quote the output\n" +#endif +; + + +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"); + exit(0); + } else + fatalError("missing optstring argument\n"); + } + + if (argv[1][0] != '-' || compatible) { + quote=0; + optstr=xmalloc(strlen(argv[1])+1); + strcpy(optstr,argv[1]+strspn(argv[1],"-+")); + argv[1]=argv[0]; + exit(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=xmalloc(strlen(optarg)+1); + strcpy(optstr,optarg); + break; + case 'l': + add_long_options(optarg); + break; + case 'n': + if (name) + free(name); + name=xmalloc(strlen(optarg)+1); + strcpy(name,optarg); + break; + case 'q': + quiet_errors=1; + break; + case 'Q': + quiet_output=1; + break; + case 's': + set_shell(optarg); + break; + case 'T': + exit(4); + case 'u': + quote=0; + break; + default: + usage(getopt_usage); + } + + if (!optstr) { + if (optind >= argc) + fatalError("missing optstring argument\n"); + else { + optstr=xmalloc(strlen(argv[optind])+1); + strcpy(optstr,argv[optind]); + optind++; + } + } + if (name) + argv[optind-1]=name; + else + argv[optind-1]=argv[0]; + exit(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: +*/ |