ossp-pkg/getopt/getopt_main.c
1.2
/*
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@pld.org.pl>)
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <ctype.h>
#include "getopt.h"
#define WITHOUT_GETTEXT 1
#define _(x) x
/* 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 */
void *our_malloc(size_t size);
void *our_realloc(void *ptr, size_t size);
const char *normalize(const char *arg);
int generate_output(char * argv[],int argc,const char *optstr,
const struct option *longopts);
int main(int argc, char *argv[]);
void parse_error(const char *message);
void add_long_options(char *options);
void add_longopt(const char *name,int has_arg);
void print_help(void);
void set_shell(const char *new_shell);
void set_initial_shell(void);
void *our_malloc(size_t size)
{
void *ret=malloc(size);
if (! ret) {
fprintf(stderr,_("%s: Out of memory!\n"),"getopt");
exit(3);
}
return(ret);
}
void *our_realloc(void *ptr, size_t size)
{
void *ret=realloc(ptr,size);
if (! ret && size) {
fprintf(stderr,_("%s: Out of memory!\n"),"getopt");
exit(3);
}
return(ret);
}
/*
* 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=our_malloc(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=our_malloc(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;
}
/*
* Report an error when parsing getopt's own arguments.
* If message is NULL, we already sent a message, we just exit with a helpful
* hint.
*/
void parse_error(const char *message)
{
if (message)
fprintf(stderr,"getopt: %s\n",message);
fputs(_("Try `getopt --help' for more information.\n"),stderr);
exit(2);
}
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=our_realloc(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 = our_malloc(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)
parse_error(_("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
parse_error(_("unknown shell after -s or --shell argument"));
}
void print_help(void)
{
fputs(_("Usage: getopt optstring parameters\n"),stderr);
fputs(_(" getopt [options] [--] optstring parameters\n"),stderr);
fputs(_(" getopt [options] -o|--options optstring [options] [--]\n"),stderr);
fputs(_(" parameters\n"),stderr);
fputs(_(" -a, --alternative Allow long options starting with single -\n"),stderr);
fputs(_(" -h, --help This small usage guide\n"),stderr);
fputs(_(" -l, --longoptions=longopts Long options to be recognized\n"),stderr);
fputs(_(" -n, --name=progname The name under which errors are reported\n"),stderr);
fputs(_(" -o, --options=optstring Short options to be recognized\n"),stderr);
fputs(_(" -q, --quiet Disable error reporting by getopt(3)\n"),stderr);
fputs(_(" -Q, --quiet-output No normal output\n"),stderr);
fputs(_(" -s, --shell=shell Set shell quoting conventions\n"),stderr);
fputs(_(" -T, --test Test for getopt(1) version\n"),stderr);
fputs(_(" -u, --unqote Do not quote the output\n"),stderr);
fputs(_(" -V, --version Output version information\n"),stderr);
exit(2);
}
/* 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'},
{"help",no_argument,NULL,'h'},
{"alternative",no_argument,NULL,'a'},
{"name",required_argument,NULL,'n'},
{"version",no_argument,NULL,'V'},
{NULL,0,NULL,0}
};
/* Stop scanning as soon as a non-option argument is found! */
static const char *shortopts="+ao:l:n:qQs:TuhV";
int main(int argc, char *argv[])
{
char *optstr=NULL;
char *name=NULL;
int opt;
int compatible=0;
#if WITHOUT_GETTEXT
#else
setlocale(LC_ALL,"");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
#endif
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
parse_error(_("missing optstring argument"));
}
if (argv[1][0] != '-' || compatible) {
quote=0;
optstr=our_malloc(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 'h':
print_help();
exit(0);
case 'o':
if (optstr)
free(optstr);
optstr=our_malloc(strlen(optarg)+1);
strcpy(optstr,optarg);
break;
case 'l':
add_long_options(optarg);
break;
case 'n':
if (name)
free(name);
name=our_malloc(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;
case 'V':
printf(_("getopt (enhanced) 1.1.3\n"));
exit(0);
case '?':
case ':':
parse_error(NULL);
default:
parse_error(_("internal error, contact the author."));
}
if (!optstr)
{
if (optind >= argc)
parse_error(_("missing optstring argument"));
else {
optstr=our_malloc(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));
}
