mirror of
https://github.com/topjohnwu/ndk-busybox.git
synced 2024-11-29 14:40:25 +00:00
400 lines
14 KiB
C
400 lines
14 KiB
C
/*
|
|
* 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=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 */
|
|
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)
|
|
{
|
|
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)
|
|
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");
|
|
exit(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];
|
|
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:
|
|
show_usage();
|
|
}
|
|
|
|
if (!optstr) {
|
|
if (optind >= argc)
|
|
error_msg_and_die("missing optstring argument");
|
|
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:
|
|
*/
|