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-rw-r--r--misc-utils/getopt.c484
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diff --git a/misc-utils/getopt.c b/misc-utils/getopt.c
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+/*
+ * getopt.c - Enhanced implementation of BSD getopt(1)
+ * Copyright (c) 1997-2014 Frodo Looijaard <frodo@frodo.looijaard.name>
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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 Miśkiewicz
+ * <misiek@pld.org.pl>)
+ * Version 1.1.4: Mon Nov 7 2005
+ * Fixed a few type's in the manpage
+ * Version 1.1.5: Sun Aug 12 2012
+ * Sync with util-linux-2.21, fixed build problems, many new translations
+ * Version 1.1.6: Mon Nov 24 2014
+ * Sync with util-linux git 20141120, detect ambiguous long options, fix
+ * backslash problem in tcsh
+ */
+
+/* Exit codes:
+ * 0) No errors, successful 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
+ */
+#define GETOPT_EXIT_CODE 1
+#define PARAMETER_EXIT_CODE 2
+#define XALLOC_EXIT_CODE 3
+#define CLOSE_EXIT_CODE XALLOC_EXIT_CODE
+#define TEST_EXIT_CODE 4
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <ctype.h>
+#include <getopt.h>
+#ifdef HAVE_SYS_PARAM_H
+# include <sys/param.h> /* BSD */
+#endif
+
+#include "closestream.h"
+#include "nls.h"
+#include "strutils.h"
+#include "xalloc.h"
+
+/* NON_OPT is the code that is returned getopt(3) when a non-option is
+ * found in 'char optstring[]="-abc...";', e.g., it begins by '-' */
+#define NON_OPT 1
+/* LONG_OPT is the code that is returned when a long option is found. */
+#define LONG_OPT 0
+
+/* The shells recognized. */
+typedef enum { BASH, TCSH } shell_t;
+
+struct getopt_control {
+ shell_t shell; /* the shell we generate output for */
+ char *optstr; /* getopt(3) optstring */
+ char *name;
+ struct option *long_options; /* long options */
+ int long_options_length; /* length of options array */
+ int long_options_nr; /* number of used elements in array */
+ unsigned int
+ compatible:1, /* compatibility mode for 'difficult' programs */
+ quiet_errors:1, /* print errors */
+ quiet_output:1, /* print output */
+ quote:1; /* quote output */
+};
+
+enum { REALLOC_INCREMENT = 8 };
+
+/* Allow changing which getopt is in use with function pointer. */
+static int (*getopt_long_fp) (int argc, char *const *argv, const char *optstr,
+ const struct option * longopts, int *longindex);
+
+/*
+ * 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.
+ */
+static void print_normalized(const struct getopt_control *ctl, const char *arg)
+{
+ char *buf;
+ const char *argptr = arg;
+ char *bufptr;
+
+ if (!ctl->quote) {
+ printf(" %s", arg);
+ return;
+ }
+
+ /*
+ * Each character in arg may take up to 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'.
+ */
+ buf = xmalloc(strlen(arg) * 4 + 3);
+ bufptr = buf;
+
+ for (*bufptr++ = '\''; *argptr; argptr++) {
+ if (ctl->shell == TCSH) {
+ switch (*argptr) {
+ case '\\':
+ /* Backslash: replace it with: '\\' */
+ *bufptr++ = '\\';
+ *bufptr++ = '\\';
+ continue;
+ case '!':
+ /* Exclamation mark: replace it with: \! */
+ *bufptr++ = '\'';
+ *bufptr++ = '\\';
+ *bufptr++ = '!';
+ *bufptr++ = '\'';
+ continue;
+ case '\n':
+ /* Newline: replace it with: \n */
+ *bufptr++ = '\\';
+ *bufptr++ = 'n';
+ continue;
+ }
+ if (isspace(*argptr)) {
+ /* Non-newline whitespace: replace it with \<ws> */
+ *bufptr++ = '\'';
+ *bufptr++ = '\\';
+ *bufptr++ = *argptr;
+ *bufptr++ = '\'';
+ continue;
+ }
+ }
+ if (*argptr == '\'') {
+ /* Quote: replace it with: '\'' */
+ *bufptr++ = '\'';
+ *bufptr++ = '\\';
+ *bufptr++ = '\'';
+ *bufptr++ = '\'';
+ } else
+ /* Just copy */
+ *bufptr++ = *argptr;
+ }
+
+ *bufptr++ = '\'';
+ *bufptr++ = '\0';
+ printf(" %s", buf);
+ free(buf);
+}
+
+/*
+ * 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.
+ */
+static int generate_output(struct getopt_control *ctl, char *argv[], int argc)
+{
+ int exit_code = EXIT_SUCCESS; /* Assume everything will be OK */
+ int opt;
+ int longindex;
+ const char *charptr;
+
+ if (ctl->quiet_errors)
+ /* No error reporting from getopt(3) */
+ opterr = 0;
+ /* Reset getopt(3) */
+ optind = 0;
+
+ while ((opt =
+ (getopt_long_fp
+ (argc, argv, ctl->optstr,
+ (const struct option *)ctl->long_options, &longindex)))
+ != EOF) {
+ if (opt == '?' || opt == ':')
+ exit_code = GETOPT_EXIT_CODE;
+ else if (!ctl->quiet_output) {
+ switch (opt) {
+ case LONG_OPT:
+ printf(" --%s", ctl->long_options[longindex].name);
+ if (ctl->long_options[longindex].has_arg)
+ print_normalized(ctl, optarg ? optarg : "");
+ break;
+ case NON_OPT:
+ print_normalized(ctl, optarg ? optarg : "");
+ break;
+ default:
+ printf(" -%c", opt);
+ charptr = strchr(ctl->optstr, opt);
+ if (charptr != NULL && *++charptr == ':')
+ print_normalized(ctl, optarg ? optarg : "");
+ }
+ }
+ }
+ if (!ctl->quiet_output) {
+ printf(" --");
+ while (optind < argc)
+ print_normalized(ctl, argv[optind++]);
+ printf("\n");
+ }
+ for (longindex = 0; longindex < ctl->long_options_nr; longindex++)
+ free((char *)ctl->long_options[longindex].name);
+ free(ctl->long_options);
+ free(ctl->optstr);
+ free(ctl->name);
+ 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.
+ */
+static void __attribute__ ((__noreturn__)) parse_error(const char *message)
+{
+ if (message)
+ warnx("%s", message);
+ errtryhelp(PARAMETER_EXIT_CODE);
+}
+
+
+/* Register a long option. The contents of name is copied. */
+static void add_longopt(struct getopt_control *ctl, const char *name, int has_arg)
+{
+ static int flag;
+ int nr = ctl->long_options_nr;
+
+ if (ctl->long_options_nr == ctl->long_options_length) {
+ ctl->long_options_length += REALLOC_INCREMENT;
+ ctl->long_options = xrealloc(ctl->long_options,
+ sizeof(struct option) *
+ ctl->long_options_length);
+ }
+ if (name) {
+ /* Not for init! */
+ ctl->long_options[nr].has_arg = has_arg;
+ ctl->long_options[nr].flag = &flag;
+ ctl->long_options[nr].val = ctl->long_options_nr;
+ ctl->long_options[nr].name = xstrdup(name);
+ } else {
+ /* lets use add_longopt(ct, NULL, 0) to terminate the array */
+ ctl->long_options[nr].name = NULL;
+ ctl->long_options[nr].has_arg = 0;
+ ctl->long_options[nr].flag = NULL;
+ ctl->long_options[nr].val = 0;
+ }
+}
+
+
+static void add_short_options(struct getopt_control *ctl, char *options)
+{
+ free(ctl->optstr);
+ if (*options != '+' && getenv("POSIXLY_CORRECT"))
+ ctl->optstr = strconcat("+", options);
+ else
+ ctl->optstr = xstrdup(options);
+ if (!ctl->optstr)
+ err_oom();
+}
+
+
+/*
+ * Register several long options. options is a string of long options,
+ * separated by commas or whitespace. This nukes options!
+ */
+static void add_long_options(struct getopt_control *ctl, char *options)
+{
+ int arg_opt;
+ char *tokptr = strtok(options, ", \t\n");
+
+ while (tokptr) {
+ size_t len = strlen(tokptr);
+
+ arg_opt = no_argument;
+ if (len > 0) {
+ if (tokptr[len - 1] == ':') {
+ if (tokptr[len - 2] == ':') {
+ tokptr[len - 2] = '\0';
+ arg_opt = optional_argument;
+ } else {
+ tokptr[len - 1] = '\0';
+ arg_opt = required_argument;
+ }
+ if (!*tokptr)
+ parse_error(_
+ ("empty long option after "
+ "-l or --long argument"));
+ }
+ add_longopt(ctl, tokptr, arg_opt);
+ ctl->long_options_nr++;
+ }
+ tokptr = strtok(NULL, ", \t\n");
+ }
+ add_longopt(ctl, NULL, 0); /* ensure long_options[] is not full */
+}
+
+static shell_t shell_type(const char *new_shell)
+{
+ if (!strcmp(new_shell, "bash"))
+ return BASH;
+ if (!strcmp(new_shell, "sh"))
+ return BASH;
+ if (!strcmp(new_shell, "tcsh"))
+ return TCSH;
+ if (!strcmp(new_shell, "csh"))
+ return TCSH;
+ parse_error(_("unknown shell after -s or --shell argument"));
+}
+
+static void __attribute__((__noreturn__)) usage(void)
+{
+ fputs(USAGE_HEADER, stdout);
+ printf(_(
+ " %1$s <optstring> <parameters>\n"
+ " %1$s [options] [--] <optstring> <parameters>\n"
+ " %1$s [options] -o|--options <optstring> [options] [--] <parameters>\n"),
+ program_invocation_short_name);
+
+ fputs(USAGE_SEPARATOR, stdout);
+ fputs(_("Parse command options.\n"), stdout);
+
+ fputs(USAGE_OPTIONS, stdout);
+ fputs(_(" -a, --alternative allow long options starting with single -\n"), stdout);
+ fputs(_(" -l, --longoptions <longopts> the long options to be recognized\n"), stdout);
+ fputs(_(" -n, --name <progname> the name under which errors are reported\n"), stdout);
+ fputs(_(" -o, --options <optstring> the short options to be recognized\n"), stdout);
+ fputs(_(" -q, --quiet disable error reporting by getopt(3)\n"), stdout);
+ fputs(_(" -Q, --quiet-output no normal output\n"), stdout);
+ fputs(_(" -s, --shell <shell> set quoting conventions to those of <shell>\n"), stdout);
+ fputs(_(" -T, --test test for getopt(1) version\n"), stdout);
+ fputs(_(" -u, --unquoted do not quote the output\n"), stdout);
+ fputs(USAGE_SEPARATOR, stdout);
+ printf(USAGE_HELP_OPTIONS(31));
+ printf(USAGE_MAN_TAIL("getopt(1)"));
+ exit(EXIT_SUCCESS);
+}
+
+int main(int argc, char *argv[])
+{
+ struct getopt_control ctl = {
+ .shell = BASH,
+ .quote = 1
+ };
+ int opt;
+
+ /* Stop scanning as soon as a non-option argument is found! */
+ static const char *shortopts = "+ao:l:n:qQs:TuhV";
+ static const 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}
+ };
+
+ setlocale(LC_ALL, "");
+ bindtextdomain(PACKAGE, LOCALEDIR);
+ textdomain(PACKAGE);
+ close_stdout_atexit();
+
+ if (getenv("GETOPT_COMPATIBLE"))
+ ctl.compatible = 1;
+
+ if (argc == 1) {
+ if (ctl.compatible) {
+ /*
+ * For some reason, the original getopt gave no
+ * error when there were no arguments.
+ */
+ printf(" --\n");
+ return EXIT_SUCCESS;
+ }
+ parse_error(_("missing optstring argument"));
+ }
+
+ add_longopt(&ctl, NULL, 0); /* init */
+ getopt_long_fp = getopt_long;
+
+ if (argv[1][0] != '-' || ctl.compatible) {
+ ctl.quote = 0;
+ ctl.optstr = xmalloc(strlen(argv[1]) + 1);
+ strcpy(ctl.optstr, argv[1] + strspn(argv[1], "-+"));
+ argv[1] = argv[0];
+ return generate_output(&ctl, argv + 1, argc - 1);
+ }
+
+ while ((opt =
+ getopt_long(argc, argv, shortopts, longopts, NULL)) != EOF)
+ switch (opt) {
+ case 'a':
+ getopt_long_fp = getopt_long_only;
+ break;
+ case 'o':
+ add_short_options(&ctl, optarg);
+ break;
+ case 'l':
+ add_long_options(&ctl, optarg);
+ break;
+ case 'n':
+ free(ctl.name);
+ ctl.name = xstrdup(optarg);
+ break;
+ case 'q':
+ ctl.quiet_errors = 1;
+ break;
+ case 'Q':
+ ctl.quiet_output = 1;
+ break;
+ case 's':
+ ctl.shell = shell_type(optarg);
+ break;
+ case 'T':
+ free(ctl.long_options);
+ return TEST_EXIT_CODE;
+ case 'u':
+ ctl.quote = 0;
+ break;
+
+ case 'V':
+ print_version(EXIT_SUCCESS);
+ case '?':
+ case ':':
+ parse_error(NULL);
+ case 'h':
+ usage();
+ default:
+ parse_error(_("internal error, contact the author."));
+ }
+
+ if (!ctl.optstr) {
+ if (optind >= argc)
+ parse_error(_("missing optstring argument"));
+ else {
+ add_short_options(&ctl, argv[optind]);
+ optind++;
+ }
+ }
+
+ if (ctl.name) {
+ argv[optind - 1] = ctl.name;
+#if defined (HAVE_SETPROGNAME) && !defined (__linux__)
+ setprogname(ctl.name);
+#endif
+ } else
+ argv[optind - 1] = argv[0];
+
+ return generate_output(&ctl, argv + optind - 1, argc - optind + 1);
+}
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