kc3-lang/pkgconf/main.c

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• Show log

  Commit

• Author : William Pitcock
  Date : 2012-08-08 10:19:39
  Hash : 56ba08b6
  Message : main: add --simulate (related to issue #33)

• main.c

• /*
   * main.c
   * main() routine, printer functions
   *
   * Copyright (c) 2011 pkgconf authors (see AUTHORS).
   *
   * Permission to use, copy, modify, and/or distribute this software for any
   * purpose with or without fee is hereby granted, provided that the above
   * copyright notice and this permission notice appear in all copies.
   *
   * This software is provided 'as is' and without any warranty, express or
   * implied.  In no event shall the authors be liable for any damages arising
   * from the use of this software.
   */
  
  #include "config.h"
  #include "pkg.h"
  #include "bsdstubs.h"
  
  #define PKG_CFLAGS			(1<<1)
  #define PKG_CFLAGS_ONLY_I		(1<<2)
  #define PKG_CFLAGS_ONLY_OTHER		(1<<3)
  #define PKG_LIBS			(1<<4)
  #define PKG_LIBS_ONLY_LDPATH		(1<<5)
  #define PKG_LIBS_ONLY_LIBNAME		(1<<6)
  #define PKG_LIBS_ONLY_OTHER		(1<<7)
  #define PKG_MODVERSION			(1<<8)
  #define PKG_REQUIRES			(1<<9)
  #define PKG_REQUIRES_PRIVATE		(1<<10)
  #define PKG_VARIABLES			(1<<11)
  #define PKG_DIGRAPH			(1<<12)
  #define PKG_KEEP_SYSTEM_CFLAGS		(1<<13)
  #define PKG_KEEP_SYSTEM_LIBS		(1<<14)
  #define PKG_VERSION			(1<<15)
  #define PKG_ABOUT			(1<<16)
  #define PKG_ENV_ONLY			(1<<17)
  #define PKG_ERRORS_ON_STDOUT		(1<<18)
  #define PKG_SILENCE_ERRORS		(1<<19)
  #define PKG_IGNORE_CONFLICTS		(1<<20)
  #define PKG_STATIC			(1<<21)
  #define PKG_NO_UNINSTALLED		(1<<22)
  #define PKG_UNINSTALLED			(1<<23)
  #define PKG_LIST			(1<<24)
  #define PKG_HELP			(1<<25)
  #define PKG_PRINT_ERRORS		(1<<26)
  #define PKG_SIMULATE			(1<<27)
  
  static unsigned int global_traverse_flags = PKGF_NONE;
  
  static int want_flags;
  static int maximum_traverse_depth = -1;
  
  static char *want_variable = NULL;
  static char *sysroot_dir = NULL;
  
  FILE *error_msgout = NULL;
  
  static bool
  fragment_has_system_dir(pkg_fragment_t *frag)
  {
  	switch (frag->type)
  	{
  	case 'L':
  		if ((want_flags & PKG_KEEP_SYSTEM_CFLAGS) == 0 && !strcasecmp(SYSTEM_LIBDIR, frag->data))
  			return true;
  	case 'I':
  		if ((want_flags & PKG_KEEP_SYSTEM_LIBS) == 0 && !strcasecmp(SYSTEM_INCLUDEDIR, frag->data))
  			return true;
  	default:
  		break;
  	}
  
  	return false;
  }
  
  static inline const char *
  print_sysroot_dir(pkg_fragment_t *frag)
  {
  	if (sysroot_dir == NULL)
  		return "";
  	else switch (frag->type)
  	{
  	case 'L':
  	case 'I':
  		return sysroot_dir;
  	default:
  		break;
  	}
  
  	return "";
  }
  
  static void
  print_fragment(pkg_fragment_t *frag)
  {
  	if (fragment_has_system_dir(frag))
  		return;
  
  	if (frag->type)
  		printf("-%c%s%s ", frag->type, print_sysroot_dir(frag), frag->data);
  	else
  		printf("%s ", frag->data);
  }
  
  static void
  print_list_entry(const pkg_t *entry)
  {
  	if (entry->uninstalled)
  		return;
  
  	printf("%-30s %s - %s\n", entry->id, entry->realname, entry->description);
  }
  
  static void
  print_cflags(pkg_fragment_t *list)
  {
  	pkg_fragment_t *frag;
  
  	PKG_FOREACH_LIST_ENTRY(list, frag)
  	{
  		if ((want_flags & PKG_CFLAGS_ONLY_I) == PKG_CFLAGS_ONLY_I && frag->type != 'I')
  			continue;
  		else if ((want_flags & PKG_CFLAGS_ONLY_OTHER) == PKG_CFLAGS_ONLY_OTHER && frag->type == 'I')
  			continue;
  
  		print_fragment(frag);
  	}
  }
  
  static void
  print_libs(pkg_fragment_t *list)
  {
  	pkg_fragment_t *frag;
  
  	PKG_FOREACH_LIST_ENTRY(list, frag)
  	{
  		if ((want_flags & PKG_LIBS_ONLY_LDPATH) == PKG_LIBS_ONLY_LDPATH && frag->type != 'L')
  			continue;
  		else if ((want_flags & PKG_LIBS_ONLY_LIBNAME) == PKG_LIBS_ONLY_LIBNAME && frag->type != 'l')
  			continue;
  		else if ((want_flags & PKG_LIBS_ONLY_OTHER) == PKG_LIBS_ONLY_OTHER && (frag->type == 'l' || frag->type == 'L'))
  			continue;
  
  		print_fragment(frag);
  	}
  }
  
  static void
  print_modversion(pkg_t *pkg, void *unused, unsigned int flags)
  {
  	(void) unused;
  	(void) flags;
  
  	if (pkg->version != NULL)
  		printf("%s\n", pkg->version);
  }
  
  static void
  print_variables(pkg_t *pkg, void *unused, unsigned int flags)
  {
  	pkg_tuple_t *node;
  	(void) unused;
  	(void) flags;
  
  	PKG_FOREACH_LIST_ENTRY(pkg->vars, node)
  		printf("%s\n", node->key);
  }
  
  static void
  print_requires(pkg_t *pkg)
  {
  	pkg_dependency_t *node;
  
  	PKG_FOREACH_LIST_ENTRY(pkg->requires, node)
  	{
  		printf("%s", node->package);
  
  		if (node->version != NULL)
  			printf(" %s %s", pkg_get_comparator(node), node->version);
  
  		printf("\n");
  	}
  }
  
  static void
  print_requires_private(pkg_t *pkg)
  {
  	pkg_dependency_t *node;
  
  	PKG_FOREACH_LIST_ENTRY(pkg->requires_private, node)
  	{
  		printf("%s", node->package);
  
  		if (node->version != NULL)
  			printf(" %s %s", pkg_get_comparator(node), node->version);
  
  		printf("\n");
  	}
  }
  
  static void
  print_digraph_node(pkg_t *pkg, void *unused, unsigned int flags)
  {
  	pkg_dependency_t *node;
  	(void) unused;
  	(void) flags;
  
  	printf("\"%s\" [fontname=Sans fontsize=8]\n", pkg->id);
  
  	PKG_FOREACH_LIST_ENTRY(pkg->requires, node)
  	{
  		printf("\"%s\" -- \"%s\" [fontname=Sans fontsize=8]\n", node->package, pkg->id);
  	}
  }
  
  static void
  apply_digraph(pkg_t *world, void *unused, int maxdepth, unsigned int flags)
  {
  	printf("graph deptree {\n");
  	printf("edge [color=blue len=7.5 fontname=Sans fontsize=8]\n");
  	printf("node [fontname=Sans fontsize=8]\n");
  
  	pkg_traverse(world, print_digraph_node, unused, maxdepth, flags);
  
  	printf("}\n");
  }
  
  static void
  apply_modversion(pkg_t *world, void *unused, int maxdepth, unsigned int flags)
  {
  	pkg_traverse(world, print_modversion, unused, maxdepth, flags);
  }
  
  static void
  apply_variables(pkg_t *world, void *unused, int maxdepth, unsigned int flags)
  {
  	pkg_traverse(world, print_variables, unused, maxdepth, flags);
  }
  
  typedef struct {
  	const char *variable;
  	char buf[PKG_BUFSIZE];
  } var_request_t;
  
  static void
  print_variable(pkg_t *pkg, void *data, unsigned int flags)
  {
  	var_request_t *req = data;
  	const char *var;
  	(void) flags;
  
  	var = pkg_tuple_find(pkg->vars, req->variable);
  	if (var != NULL)
  	{
  		if (*(req->buf) == '\0')
  		{
  			strlcpy(req->buf, var, sizeof(req->buf));
  			return;
  		}
  
  		strlcat(req->buf, " ", sizeof(req->buf));
  		strlcat(req->buf, var, sizeof(req->buf));
  	}
  }
  
  static void
  apply_variable(pkg_t *world, void *variable, int maxdepth, unsigned int flags)
  {
  	var_request_t req = {
  		.variable = variable,
  	};
  
  	*req.buf = '\0';
  
  	pkg_traverse(world, print_variable, &req, maxdepth, flags);
  	printf("%s\n", req.buf);
  }
  
  static void
  apply_cflags(pkg_t *world, void *unused, int maxdepth, unsigned int flags)
  {
  	pkg_fragment_t *list;
  	(void) unused;
  
  	list = pkg_cflags(world, maxdepth, flags | PKGF_SEARCH_PRIVATE);
  	print_cflags(list);
  
  	pkg_fragment_free(list);
  }
  
  static void
  apply_libs(pkg_t *world, void *unused, int maxdepth, unsigned int flags)
  {
  	pkg_fragment_t *list;
  	(void) unused;
  
  	list = pkg_libs(world, maxdepth, flags);
  	print_libs(list);
  
  	pkg_fragment_free(list);
  }
  
  static void
  apply_requires(pkg_t *world, void *unused, int maxdepth, unsigned int flags)
  {
  	pkg_dependency_t *iter;
  	(void) unused;
  	(void) maxdepth;
  
  	PKG_FOREACH_LIST_ENTRY(world->requires, iter)
  	{
  		pkg_t *pkg;
  
  		pkg = pkg_verify_dependency(iter, flags, NULL);
  		print_requires(pkg);
  
  		pkg_free(pkg);
  	}
  }
  
  static void
  apply_requires_private(pkg_t *world, void *unused, int maxdepth, unsigned int flags)
  {
  	pkg_dependency_t *iter;
  	(void) unused;
  	(void) maxdepth;
  
  	PKG_FOREACH_LIST_ENTRY(world->requires, iter)
  	{
  		pkg_t *pkg;
  
  		pkg = pkg_verify_dependency(iter, flags | PKGF_SEARCH_PRIVATE, NULL);
  		print_requires_private(pkg);
  
  		pkg_free(pkg);
  	}
  }
  
  static void
  check_uninstalled(pkg_t *pkg, void *data, unsigned int flags)
  {
  	int *retval = data;
  	(void) flags;
  
  	if (pkg->uninstalled)
  		*retval = EXIT_SUCCESS;
  }
  
  static void
  apply_uninstalled(pkg_t *world, void *data, int maxdepth, unsigned int flags)
  {
  	pkg_traverse(world, check_uninstalled, data, maxdepth, flags);
  }
  
  static void
  print_graph_node(pkg_t *pkg, void *data, unsigned int flags)
  {
  	(void) data;
  	(void) flags;
  
  	printf("Considering graph node '%s' (%p)\n", pkg->id, pkg);
  }
  
  static void
  apply_simulate(pkg_t *world, void *data, int maxdepth, unsigned int flags)
  {
  	pkg_traverse(world, print_graph_node, data, maxdepth, flags);
  }
  
  static void
  version(void)
  {
  	printf("%s\n", PKG_PKGCONFIG_VERSION_EQUIV);
  }
  
  static void
  about(void)
  {
  	printf("%s %s%s\n", PACKAGE_NAME, PACKAGE_VERSION, HAVE_STRICT_MODE ? " [strict]" : " [pkg-config compatible]");
  	printf("Copyright (c) 2011 - 2012 pkgconf authors (see AUTHORS in documentation directory).\n\n");
  	printf("Permission to use, copy, modify, and/or distribute this software for any\n");
  	printf("purpose with or without fee is hereby granted, provided that the above\n");
  	printf("copyright notice and this permission notice appear in all copies.\n\n");
  	printf("This software is provided 'as is' and without any warranty, express or\n");
  	printf("implied.  In no event shall the authors be liable for any damages arising\n");
  	printf("from the use of this software.\n\n");
  	printf("Report bugs at <%s>.\n", PACKAGE_BUGREPORT);
  }
  
  static void
  usage(void)
  {
  	printf("usage: %s [OPTIONS] [LIBRARIES]\n", PACKAGE_NAME);
  
  	printf("\nbasic options:\n\n");
  
  	printf("  --help                            this message\n");
  	printf("  --about                           print pkgconf version and license to stdout\n");
  	printf("  --version                         print supported pkg-config version to stdout\n");
  	printf("  --atleast-pkgconfig-version       check whether or not pkgconf is compatible\n");
  	printf("                                    with a specified pkg-config version\n");
  	printf("  --errors-to-stdout                print all errors on stdout instead of stderr\n");
  	printf("  --silence-errors                  explicitly be silent about errors\n");
  	printf("  --list-all                        list all known packages\n");
  	printf("  --simulate                        simulate walking the calculated dependency graph\n");
  
  	printf("\nchecking specific pkg-config database entries:\n\n");
  
  	printf("  --atleast-version                 require a specific version of a module\n");
  	printf("  --exact-version                   require an exact version of a module\n");
  	printf("  --max-version                     require a maximum version of a module\n");
  	printf("  --exists                          check whether or not a module exists\n");
  	printf("  --uninstalled                     check whether or not an uninstalled module will be used\n");
  	printf("  --no-uninstalled                  never use uninstalled modules when satisfying dependencies\n");
  	printf("  --maximum-traverse-depth          maximum allowed depth for dependency graph\n");
  	printf("  --static                          be more aggressive when computing dependency graph\n");
  	printf("                                    (for static linking)\n");
  	printf("  --env-only                        look only for package entries in PKG_CONFIG_PATH\n");
  	printf("  --ignore-conflicts                ignore 'conflicts' rules in modules\n");
  
  	printf("\nquerying specific pkg-config database fields:\n\n");
  
  	printf("  --define-variable=varname=value   define variable 'varname' as 'value'\n");
  	printf("  --variable=varname                print specified variable entry to stdout\n");
  	printf("  --cflags                          print required CFLAGS to stdout\n");
  	printf("  --cflags-only-I                   print required include-dir CFLAGS to stdout\n");
  	printf("  --cflags-only-other               print required non-include-dir CFLAGS to stdout\n");
  	printf("  --libs                            print required linker flags to stdout\n");
  	printf("  --libs-only-L                     print required LDPATH linker flags to stdout\n");
  	printf("  --libs-only-l                     print required LIBNAME linker flags to stdout\n");
  	printf("  --libs-only-other                 print required other linker flags to stdout\n");
  	printf("  --print-requires                  print required dependency frameworks to stdout\n");
  	printf("  --print-requires-private          print required dependency frameworks for static\n");
  	printf("                                    linking to stdout\n");
  	printf("  --print-variables                 print all known variables in module to stdout\n");
  	printf("  --digraph                         print entire dependency graph in graphviz 'dot' format\n");
  	printf("  --keep-system-cflags              keep -I%s entries in cflags output\n", SYSTEM_INCLUDEDIR);
  	printf("  --keep-system-libs                keep -L%s entries in libs output\n", SYSTEM_LIBDIR);
  
  	printf("\nreport bugs to <%s>.\n", PACKAGE_BUGREPORT);
  }
  
  int
  main(int argc, char *argv[])
  {
  	int ret;
  	pkg_queue_t *pkgq = NULL;
  	pkg_queue_t *pkgq_head = NULL;
  	char *builddir;
  	char *required_pkgconfig_version = NULL;
  	char *required_exact_module_version = NULL;
  	char *required_max_module_version = NULL;
  	char *required_module_version = NULL;
  
  	want_flags = 0;
  
  	struct pkg_option options[] = {
  		{ "version", no_argument, &want_flags, PKG_VERSION|PKG_PRINT_ERRORS, },
  		{ "about", no_argument, &want_flags, PKG_ABOUT|PKG_PRINT_ERRORS, },
  		{ "atleast-version", required_argument, NULL, 2, },
  		{ "atleast-pkgconfig-version", required_argument, NULL, 3, },
  		{ "libs", no_argument, &want_flags, PKG_LIBS|PKG_PRINT_ERRORS, },
  		{ "cflags", no_argument, &want_flags, PKG_CFLAGS|PKG_PRINT_ERRORS, },
  		{ "modversion", no_argument, &want_flags, PKG_MODVERSION|PKG_PRINT_ERRORS, },
  		{ "variable", required_argument, NULL, 7, },
  		{ "exists", no_argument, NULL, 8, },
  		{ "print-errors", no_argument, &want_flags, PKG_PRINT_ERRORS, },
  		{ "short-errors", no_argument, NULL, 10, },
  		{ "maximum-traverse-depth", required_argument, NULL, 11, },
  		{ "static", no_argument, &want_flags, PKG_STATIC, },
  		{ "print-requires", no_argument, &want_flags, PKG_REQUIRES, },
  		{ "print-variables", no_argument, &want_flags, PKG_VARIABLES|PKG_PRINT_ERRORS, },
  		{ "digraph", no_argument, &want_flags, PKG_DIGRAPH, },
  		{ "help", no_argument, &want_flags, PKG_HELP, },
  		{ "env-only", no_argument, &want_flags, PKG_ENV_ONLY, },
  		{ "print-requires-private", no_argument, &want_flags, PKG_REQUIRES_PRIVATE, },
  		{ "cflags-only-I", no_argument, &want_flags, PKG_CFLAGS|PKG_CFLAGS_ONLY_I|PKG_PRINT_ERRORS, },
  		{ "cflags-only-other", no_argument, &want_flags, PKG_CFLAGS|PKG_CFLAGS_ONLY_OTHER|PKG_PRINT_ERRORS, },
  		{ "libs-only-L", no_argument, &want_flags, PKG_LIBS|PKG_LIBS_ONLY_LDPATH|PKG_PRINT_ERRORS, },
  		{ "libs-only-l", no_argument, &want_flags, PKG_LIBS|PKG_LIBS_ONLY_LIBNAME|PKG_PRINT_ERRORS, },
  		{ "libs-only-other", no_argument, &want_flags, PKG_LIBS|PKG_LIBS_ONLY_OTHER|PKG_PRINT_ERRORS, },
  		{ "uninstalled", no_argument, &want_flags, PKG_UNINSTALLED, },
  		{ "no-uninstalled", no_argument, &want_flags, PKG_NO_UNINSTALLED, },
  		{ "keep-system-cflags", no_argument, &want_flags, PKG_KEEP_SYSTEM_CFLAGS, },
  		{ "keep-system-libs", no_argument, &want_flags, PKG_KEEP_SYSTEM_LIBS, },
  		{ "define-variable", required_argument, NULL, 27, },
  		{ "exact-version", required_argument, NULL, 28, },
  		{ "max-version", required_argument, NULL, 29, },
  		{ "ignore-conflicts", no_argument, &want_flags, PKG_IGNORE_CONFLICTS, },
  		{ "errors-to-stdout", no_argument, &want_flags, PKG_ERRORS_ON_STDOUT, },
  		{ "silence-errors", no_argument, &want_flags, PKG_SILENCE_ERRORS, },
  		{ "list-all", no_argument, &want_flags, PKG_LIST|PKG_PRINT_ERRORS, },
  		{ "simulate", no_argument, &want_flags, PKG_SIMULATE, },
  		{ NULL, 0, NULL, 0 }
  	};
  
  	while ((ret = pkg_getopt_long_only(argc, argv, "", options, NULL)) != -1)
  	{
  		switch (ret)
  		{
  		case 2:
  			required_module_version = pkg_optarg;
  			break;
  		case 3:
  			required_pkgconfig_version = pkg_optarg;
  			break;
  		case 7:
  			want_variable = pkg_optarg;
  			break;
  		case 11:
  			maximum_traverse_depth = atoi(pkg_optarg);
  			break;
  		case 27:
  			pkg_tuple_define_global(pkg_optarg);
  			break;
  		case 28:
  			required_exact_module_version = pkg_optarg;
  			break;
  		case 29:
  			required_max_module_version = pkg_optarg;
  			break;
  		case '?':
  		case ':':
  			return EXIT_FAILURE;
  			break;
  		default:
  			break;
  		}
  	}
  
  	if ((want_flags & PKG_PRINT_ERRORS) != PKG_PRINT_ERRORS)
  		want_flags |= (PKG_SILENCE_ERRORS);
  
  	if ((want_flags & PKG_SILENCE_ERRORS) == PKG_SILENCE_ERRORS && !getenv("PKG_CONFIG_DEBUG_SPEW"))
  		want_flags |= (PKG_SILENCE_ERRORS);
  	else
  		want_flags &= ~(PKG_SILENCE_ERRORS);
  
  	if ((want_flags & PKG_LIBS_ONLY_LIBNAME) == PKG_LIBS_ONLY_LIBNAME)
  		want_flags &= ~(PKG_LIBS_ONLY_OTHER|PKG_LIBS_ONLY_LDPATH);
  	else if ((want_flags & PKG_LIBS_ONLY_LDPATH) == PKG_LIBS_ONLY_LDPATH)
  		want_flags &= ~(PKG_LIBS_ONLY_OTHER);
  
  	if ((want_flags & PKG_CFLAGS_ONLY_I) == PKG_CFLAGS_ONLY_I)
  		want_flags &= ~(PKG_CFLAGS_ONLY_OTHER);
  
  	if ((want_flags & PKG_ABOUT) == PKG_ABOUT)
  	{
  		about();
  		return EXIT_SUCCESS;
  	}
  
  	if ((want_flags & PKG_VERSION) == PKG_VERSION)
  	{
  		version();
  		return EXIT_SUCCESS;
  	}
  
  	if ((want_flags & PKG_HELP) == PKG_HELP)
  	{
  		usage();
  		return EXIT_SUCCESS;
  	}
  
  	error_msgout = stderr;
  	if ((want_flags & PKG_ERRORS_ON_STDOUT) == PKG_ERRORS_ON_STDOUT)
  		error_msgout = stdout;
  	if ((want_flags & PKG_SILENCE_ERRORS) == PKG_SILENCE_ERRORS)
  		error_msgout = fopen(PATH_DEV_NULL, "w");
  
  	if ((want_flags & PKG_IGNORE_CONFLICTS) == PKG_IGNORE_CONFLICTS || getenv("PKG_CONFIG_IGNORE_CONFLICTS") != NULL)
  		global_traverse_flags |= PKGF_SKIP_CONFLICTS;
  
  	if ((want_flags & PKG_STATIC) == PKG_STATIC)
  		global_traverse_flags |= (PKGF_SEARCH_PRIVATE | PKGF_MERGE_PRIVATE_FRAGMENTS);
  
  	if ((want_flags & PKG_ENV_ONLY) == PKG_ENV_ONLY)
  		global_traverse_flags |= PKGF_ENV_ONLY;
  
  	if ((want_flags & PKG_NO_UNINSTALLED) == PKG_NO_UNINSTALLED || getenv("PKG_CONFIG_DISABLE_UNINSTALLED") != NULL)
  		global_traverse_flags |= PKGF_NO_UNINSTALLED;
  
  	if (getenv("PKG_CONFIG_ALLOW_SYSTEM_CFLAGS") != NULL)
  		want_flags |= PKG_KEEP_SYSTEM_CFLAGS;
  
  	if (getenv("PKG_CONFIG_ALLOW_SYSTEM_LIBS") != NULL)
  		want_flags |= PKG_KEEP_SYSTEM_LIBS;
  
  	if ((builddir = getenv("PKG_CONFIG_TOP_BUILD_DIR")) != NULL)
  		pkg_tuple_add_global("pc_top_builddir", builddir);
  	else
  		pkg_tuple_add_global("pc_top_builddir", "$(top_builddir)");
  
  	if ((sysroot_dir = getenv("PKG_CONFIG_SYSROOT_DIR")) != NULL)
  		pkg_tuple_add_global("pc_sysrootdir", sysroot_dir);
  	else
  		pkg_tuple_add_global("pc_sysrootdir", "/");
  
  	if (required_pkgconfig_version != NULL)
  	{
  		if (pkg_compare_version(PKG_PKGCONFIG_VERSION_EQUIV, required_pkgconfig_version) >= 0)
  			return EXIT_SUCCESS;
  
  		return EXIT_FAILURE;
  	}
  
  	if ((want_flags & PKG_LIST) == PKG_LIST)
  	{
  		pkg_scan_all(print_list_entry);
  		return EXIT_SUCCESS;
  	}
  
  	if (required_module_version != NULL)
  	{
  		pkg_t *pkg;
  		pkg_dependency_t *pkghead = NULL, *pkgiter = NULL;
  
  		while (argv[pkg_optind])
  		{
  			pkghead = pkg_dependency_parse_str(pkghead, argv[pkg_optind]);
  			pkg_optind++;
  		}
  
  		PKG_FOREACH_LIST_ENTRY(pkghead, pkgiter)
  		{
  			pkg = pkg_find(pkgiter->package, global_traverse_flags);
  			if (pkg == NULL)
  				return EXIT_FAILURE;
  
  			if (pkg_compare_version(pkg->version, required_module_version) >= 0)
  				return EXIT_SUCCESS;
  		}
  
  		return EXIT_FAILURE;
  	}
  
  	if (required_exact_module_version != NULL)
  	{
  		pkg_t *pkg;
  		pkg_dependency_t *pkghead = NULL, *pkgiter = NULL;
  
  		while (argv[pkg_optind])
  		{
  			pkghead = pkg_dependency_parse_str(pkghead, argv[pkg_optind]);
  			pkg_optind++;
  		}
  
  		PKG_FOREACH_LIST_ENTRY(pkghead, pkgiter)
  		{
  			pkg = pkg_find(pkgiter->package, global_traverse_flags);
  			if (pkg == NULL)
  				return EXIT_FAILURE;
  
  			if (pkg_compare_version(pkg->version, required_exact_module_version) == 0)
  				return EXIT_SUCCESS;
  		}
  
  		return EXIT_FAILURE;
  	}
  
  	if (required_max_module_version != NULL)
  	{
  		pkg_t *pkg;
  		pkg_dependency_t *pkghead = NULL, *pkgiter = NULL;
  
  		while (argv[pkg_optind])
  		{
  			pkghead = pkg_dependency_parse_str(pkghead, argv[pkg_optind]);
  			pkg_optind++;
  		}
  
  		PKG_FOREACH_LIST_ENTRY(pkghead, pkgiter)
  		{
  			pkg = pkg_find(pkgiter->package, global_traverse_flags);
  			if (pkg == NULL)
  				return EXIT_FAILURE;
  
  			if (pkg_compare_version(pkg->version, required_max_module_version) <= 0)
  				return EXIT_SUCCESS;
  		}
  
  		return EXIT_FAILURE;
  	}
  
  	while (1)
  	{
  		const char *package = argv[pkg_optind];
  
  		if (package == NULL)
  			break;
  
  		while (isspace(package[0]))
  			package++;
  
  		/* skip empty packages */
  		if (package[0] == '\0') {
  			pkg_optind++;
  			continue;
  		}
  
  		if (argv[pkg_optind + 1] == NULL || !PKG_OPERATOR_CHAR(*(argv[pkg_optind + 1])))
  		{
  			pkgq = pkg_queue_push(pkgq, package);
  
  			if (pkgq_head == NULL)
  				pkgq_head = pkgq;
  
  			pkg_optind++;
  		}
  		else
  		{
  			char packagebuf[PKG_BUFSIZE];
  
  			snprintf(packagebuf, sizeof packagebuf, "%s %s %s", package, argv[pkg_optind + 1], argv[pkg_optind + 2]);
  			pkg_optind += 3;
  
  			pkgq = pkg_queue_push(pkgq, packagebuf);
  
  			if (pkgq_head == NULL)
  				pkgq_head = pkgq;
  		}
  	}
  
  	if (pkgq_head == NULL)
  	{
  		fprintf(error_msgout, "Please specify at least one package name on the command line.\n");
  		return EXIT_FAILURE;
  	}
  
  	ret = EXIT_SUCCESS;
  
  	if (!pkg_queue_validate(pkgq_head, maximum_traverse_depth, global_traverse_flags))
  	{
  		ret = EXIT_FAILURE;
  		goto out;
  	}
  
  	if ((want_flags & PKG_UNINSTALLED) == PKG_UNINSTALLED)
  	{
  		ret = EXIT_FAILURE;
  		pkg_queue_apply(pkgq_head, apply_uninstalled, maximum_traverse_depth, global_traverse_flags, &ret);
  		goto out;
  	}
  
  	if ((want_flags & PKG_DIGRAPH) == PKG_DIGRAPH)
  	{
  		want_flags &= ~(PKG_CFLAGS|PKG_LIBS);
  
  		if (!pkg_queue_apply(pkgq_head, apply_digraph, maximum_traverse_depth, global_traverse_flags, NULL))
  		{
  			ret = EXIT_FAILURE;
  			goto out;
  		}
  	}
  
  	if ((want_flags & PKG_SIMULATE) == PKG_SIMULATE)
  	{
  		want_flags &= ~(PKG_CFLAGS|PKG_LIBS);
  
  		if (!pkg_queue_apply(pkgq_head, apply_simulate, maximum_traverse_depth, global_traverse_flags, NULL))
  		{
  			ret = EXIT_FAILURE;
  			goto out;
  		}
  	}
  
  	if ((want_flags & PKG_MODVERSION) == PKG_MODVERSION)
  	{
  		want_flags &= ~(PKG_CFLAGS|PKG_LIBS);
  
  		if (!pkg_queue_apply(pkgq_head, apply_modversion, 2, global_traverse_flags, NULL))
  		{
  			ret = EXIT_FAILURE;
  			goto out;
  		}
  	}
  
  	if ((want_flags & PKG_VARIABLES) == PKG_VARIABLES)
  	{
  		want_flags &= ~(PKG_CFLAGS|PKG_LIBS);
  
  		if (!pkg_queue_apply(pkgq_head, apply_variables, 2, global_traverse_flags, NULL))
  		{
  			ret = EXIT_FAILURE;
  			goto out;
  		}
  	}
  
  	if (want_variable)
  	{
  		want_flags &= ~(PKG_CFLAGS|PKG_LIBS);
  
  		if (!pkg_queue_apply(pkgq_head, apply_variable, 2, global_traverse_flags | PKGF_SKIP_ROOT_VIRTUAL, want_variable))
  		{
  			ret = EXIT_FAILURE;
  			goto out;
  		}
  	}
  
  	if ((want_flags & PKG_REQUIRES) == PKG_REQUIRES)
  	{
  		want_flags &= ~(PKG_CFLAGS|PKG_LIBS);
  
  		if (!pkg_queue_apply(pkgq_head, apply_requires, maximum_traverse_depth, global_traverse_flags, NULL))
  		{
  			ret = EXIT_FAILURE;
  			goto out;
  		}
  	}
  
  	if ((want_flags & PKG_REQUIRES_PRIVATE) == PKG_REQUIRES_PRIVATE)
  	{
  		want_flags &= ~(PKG_CFLAGS|PKG_LIBS);
  
  		if (!pkg_queue_apply(pkgq_head, apply_requires_private, maximum_traverse_depth, global_traverse_flags, NULL))
  		{
  			ret = EXIT_FAILURE;
  			goto out;
  		}
  	}
  
  	if ((want_flags & PKG_CFLAGS) == PKG_CFLAGS)
  	{
  		if (!pkg_queue_apply(pkgq_head, apply_cflags, maximum_traverse_depth, global_traverse_flags, NULL))
  		{
  			ret = EXIT_FAILURE;
  			goto out;
  		}
  	}
  
  	if ((want_flags & PKG_LIBS) == PKG_LIBS)
  	{
  		if (!pkg_queue_apply(pkgq_head, apply_libs, maximum_traverse_depth, global_traverse_flags, NULL))
  		{
  			ret = EXIT_FAILURE;
  			goto out;
  		}
  	}
  
  	if (want_flags & (PKG_CFLAGS|PKG_LIBS))
  		printf("\n");
  
  	pkg_queue_free(pkgq_head);
  
  out:
  	pkg_tuple_free_global();
  	return ret;
  }