summaryrefslogtreecommitdiff
path: root/util-linux/getopt.c
diff options
context:
space:
mode:
Diffstat (limited to 'util-linux/getopt.c')
-rw-r--r--util-linux/getopt.c416
1 files changed, 416 insertions, 0 deletions
diff --git a/util-linux/getopt.c b/util-linux/getopt.c
new file mode 100644
index 0000000..fb75790
--- /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:
+*/
generated by cgit v1.1 at 2024-11-15 10:44:12 +0000