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pkg.c
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pkg.c
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/*
* Copyright (C) 2001, 2002 Red Hat Inc.
*
* 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., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "pkg.h"
#include "parse.h"
#ifdef HAVE_MALLOC_H
# include <malloc.h>
#endif
#include <sys/types.h>
#include <dirent.h>
#include <string.h>
#include <errno.h>
#include <stdio.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <stdlib.h>
#include <ctype.h>
static void verify_package (Package *pkg);
static GHashTable *packages = NULL;
static GHashTable *locations = NULL;
static GHashTable *path_positions = NULL;
static GHashTable *globals = NULL;
static GSList *search_dirs = NULL;
static int scanned_dir_count = 0;
gboolean disable_uninstalled = FALSE;
gboolean ignore_requires = FALSE;
gboolean ignore_requires_private = TRUE;
gboolean ignore_private_libs = TRUE;
void
add_search_dir (const char *path)
{
search_dirs = g_slist_append (search_dirs, g_strdup (path));
}
void
add_search_dirs (const char *path, const char *separator)
{
char **search_dirs;
char **iter;
search_dirs = g_strsplit (path, separator, -1);
iter = search_dirs;
while (*iter)
{
debug_spew ("Adding directory '%s' from PKG_CONFIG_PATH\n",
*iter);
add_search_dir (*iter);
++iter;
}
g_strfreev (search_dirs);
}
#ifdef G_OS_WIN32
/* Guard against .pc file being installed with UPPER CASE name */
# define FOLD(x) tolower(x)
# define FOLDCMP(a, b) g_ascii_strcasecmp (a, b)
#else
# define FOLD(x) (x)
# define FOLDCMP(a, b) strcmp (a, b)
#endif
#define EXT_LEN 3
static gboolean
ends_in_dotpc (const char *str)
{
int len = strlen (str);
if (len > EXT_LEN &&
str[len - 3] == '.' &&
FOLD (str[len - 2]) == 'p' &&
FOLD (str[len - 1]) == 'c')
return TRUE;
else
return FALSE;
}
/* strlen ("uninstalled") */
#define UNINSTALLED_LEN 11
gboolean
name_ends_in_uninstalled (const char *str)
{
int len = strlen (str);
if (len > UNINSTALLED_LEN &&
FOLDCMP ((str + len - UNINSTALLED_LEN), "uninstalled") == 0)
return TRUE;
else
return FALSE;
}
/* Look for .pc files in the given directory and add them into
* locations, ignoring duplicates
*/
static void
scan_dir (const char *dirname)
{
DIR *dir;
struct dirent *dent;
int dirnamelen = strlen (dirname);
/* Use a copy of dirname cause Win32 opendir doesn't like
* superfluous trailing (back)slashes in the directory name.
*/
char *dirname_copy = g_strdup (dirname);
if (dirnamelen > 1 && dirname[dirnamelen-1] == G_DIR_SEPARATOR)
{
dirnamelen--;
dirname_copy[dirnamelen] = '\0';
}
#ifdef G_OS_WIN32
{
gchar *p;
/* Turn backslashes into slashes or
* g_shell_parse_argv() will eat them when ${prefix}
* has been expanded in parse_libs().
*/
p = dirname;
while (*p)
{
if (*p == '\\')
*p = '/';
p++;
}
}
#endif
dir = opendir (dirname_copy);
g_free (dirname_copy);
if (!dir)
{
debug_spew ("Cannot open directory '%s' in package search path: %s\n",
dirname, g_strerror (errno));
return;
}
debug_spew ("Scanning directory '%s'\n", dirname);
scanned_dir_count += 1;
while ((dent = readdir (dir)))
{
int len = strlen (dent->d_name);
if (ends_in_dotpc (dent->d_name))
{
char *pkgname = g_malloc (len - 2);
debug_spew ("File '%s' appears to be a .pc file\n", dent->d_name);
strncpy (pkgname, dent->d_name, len - EXT_LEN);
pkgname[len-EXT_LEN] = '\0';
if (g_hash_table_lookup (locations, pkgname))
{
debug_spew ("File '%s' ignored, we already know about package '%s'\n", dent->d_name, pkgname);
g_free (pkgname);
}
else
{
char *filename = g_malloc (dirnamelen + 1 + len + 1);
strncpy (filename, dirname, dirnamelen);
filename[dirnamelen] = G_DIR_SEPARATOR;
strcpy (filename + dirnamelen + 1, dent->d_name);
if (g_file_test(filename, G_FILE_TEST_IS_REGULAR) == TRUE) {
g_hash_table_insert (locations, pkgname, filename);
g_hash_table_insert (path_positions, pkgname,
GINT_TO_POINTER (scanned_dir_count));
debug_spew ("Will find package '%s' in file '%s'\n",
pkgname, filename);
} else {
debug_spew ("Ignoring '%s' while looking for '%s'; not a "
"regular file.\n", pkgname, filename);
}
}
}
else
{
debug_spew ("Ignoring file '%s' in search directory; not a .pc file\n",
dent->d_name);
}
}
closedir(dir);
}
static Package *
add_virtual_pkgconfig_package (void)
{
Package *pkg = NULL;
pkg = g_new0 (Package, 1);
pkg->key = g_strdup ("pkg-config");
pkg->version = g_strdup (VERSION);
pkg->name = g_strdup ("pkg-config");
pkg->description = g_strdup ("pkg-config is a system for managing "
"compile/link flags for libraries");
pkg->url = g_strdup ("http://pkg-config.freedesktop.org/");
if (pkg->vars == NULL)
pkg->vars = g_hash_table_new (g_str_hash, g_str_equal);
g_hash_table_insert (pkg->vars, "pc_path", pkg_config_pc_path);
debug_spew ("Adding virtual 'pkg-config' package to list of known packages\n");
g_hash_table_insert (packages, pkg->key, pkg);
return pkg;
}
void
package_init ()
{
static gboolean initted = FALSE;
if (!initted)
{
initted = TRUE;
packages = g_hash_table_new (g_str_hash, g_str_equal);
locations = g_hash_table_new (g_str_hash, g_str_equal);
path_positions = g_hash_table_new (g_str_hash, g_str_equal);
add_virtual_pkgconfig_package ();
g_slist_foreach (search_dirs, (GFunc)scan_dir, NULL);
}
}
static Package *
internal_get_package (const char *name, gboolean warn)
{
Package *pkg = NULL;
const char *location;
pkg = g_hash_table_lookup (packages, name);
if (pkg)
return pkg;
debug_spew ("Looking for package '%s'\n", name);
/* treat "name" as a filename if it ends in .pc and exists */
if ( ends_in_dotpc (name) )
{
debug_spew ("Considering '%s' to be a filename rather than a package name\n", name);
location = name;
}
else
{
/* See if we should auto-prefer the uninstalled version */
if (!disable_uninstalled &&
!name_ends_in_uninstalled (name))
{
char *un;
un = g_strconcat (name, "-uninstalled", NULL);
pkg = internal_get_package (un, FALSE);
g_free (un);
if (pkg)
{
debug_spew ("Preferring uninstalled version of package '%s'\n", name);
return pkg;
}
}
location = g_hash_table_lookup (locations, name);
}
if (location == NULL)
{
if (warn)
verbose_error ("Package %s was not found in the pkg-config search path.\n"
"Perhaps you should add the directory containing `%s.pc'\n"
"to the PKG_CONFIG_PATH environment variable\n",
name, name);
return NULL;
}
debug_spew ("Reading '%s' from file '%s'\n", name, location);
pkg = parse_package_file (location, ignore_requires, ignore_private_libs,
ignore_requires_private);
if (pkg == NULL)
{
debug_spew ("Failed to parse '%s'\n", location);
return NULL;
}
if (strstr (location, "uninstalled.pc"))
pkg->uninstalled = TRUE;
if (location != name)
pkg->key = g_strdup (name);
else
{
/* need to strip package name out of the filename */
int len = strlen (name);
const char *end = name + (len - EXT_LEN);
const char *start = end;
while (start != name && *start != G_DIR_SEPARATOR)
--start;
g_assert (end >= start);
pkg->key = g_strndup (start, end - start);
}
pkg->path_position =
GPOINTER_TO_INT (g_hash_table_lookup (path_positions, pkg->key));
debug_spew ("Path position of '%s' is %d\n",
pkg->name, pkg->path_position);
verify_package (pkg);
debug_spew ("Adding '%s' to list of known packages, returning as package '%s'\n",
pkg->key, name);
g_hash_table_insert (packages, pkg->key, pkg);
return pkg;
}
Package *
get_package (const char *name)
{
return internal_get_package (name, TRUE);
}
Package *
get_package_quiet (const char *name)
{
return internal_get_package (name, FALSE);
}
static GSList*
string_list_strip_duplicates (GSList *list)
{
GHashTable *table;
GSList *tmp;
GSList *nodups = NULL;
table = g_hash_table_new (g_str_hash, g_str_equal);
tmp = list;
while (tmp != NULL)
{
if (g_hash_table_lookup (table, tmp->data) == NULL)
{
nodups = g_slist_prepend (nodups, tmp->data);
g_hash_table_insert (table, tmp->data, tmp->data);
}
else
{
debug_spew (" removing duplicate \"%s\"\n", tmp->data);
}
tmp = g_slist_next (tmp);
}
nodups = g_slist_reverse (nodups);
g_hash_table_destroy (table);
return nodups;
}
static GSList*
string_list_strip_duplicates_from_back (GSList *list)
{
GHashTable *table;
GSList *tmp;
GSList *nodups = NULL;
GSList *reversed;
table = g_hash_table_new (g_str_hash, g_str_equal);
reversed = g_slist_reverse (g_slist_copy (list));
tmp = reversed;
while (tmp != NULL)
{
if (g_hash_table_lookup (table, tmp->data) == NULL)
{
/* This unreverses the reversed list */
nodups = g_slist_prepend (nodups, tmp->data);
g_hash_table_insert (table, tmp->data, tmp->data);
}
else
{
debug_spew (" removing duplicate (from back) \"%s\"\n", tmp->data);
}
tmp = g_slist_next (tmp);
}
g_slist_free (reversed);
g_hash_table_destroy (table);
return nodups;
}
static char *
string_list_to_string (GSList *list)
{
GSList *tmp;
GString *str = g_string_new ("");
char *retval;
tmp = list;
while (tmp != NULL) {
char *tmpstr = (char*) tmp->data;
if (pcsysrootdir != NULL &&
tmpstr[0] == '-' &&
(tmpstr[1] == 'I' ||
tmpstr[1] == 'L')) {
g_string_append_c (str, '-');
g_string_append_c (str, tmpstr[1]);
g_string_append (str, pcsysrootdir);
g_string_append (str, tmpstr+2);
} else {
g_string_append (str, tmpstr);
}
g_string_append_c (str, ' ');
tmp = g_slist_next (tmp);
}
retval = str->str;
g_string_free (str, FALSE);
return retval;
}
typedef GSList *(* GetListFunc) (Package *pkg);
static GSList *
get_l_libs (Package *pkg)
{
return pkg->l_libs;
}
static GSList *
get_L_libs (Package *pkg)
{
return pkg->L_libs;
}
static GSList*
get_other_libs (Package *pkg)
{
return pkg->other_libs;
}
static GSList *
get_I_cflags (Package *pkg)
{
return pkg->I_cflags;
}
static GSList *
get_other_cflags (Package *pkg)
{
return pkg->other_cflags;
}
static GSList *
get_conflicts (Package *pkg)
{
return pkg->conflicts;
}
static GSList *
get_requires (Package *pkg)
{
return pkg->requires;
}
static GSList *
get_requires_private (Package *pkg)
{
return pkg->requires_private;
}
static int
pathposcmp (gconstpointer a, gconstpointer b)
{
const Package *pa = a;
const Package *pb = b;
if (pa->path_position < pb->path_position)
return -1;
else if (pa->path_position > pb->path_position)
return 1;
else
return 0;
}
static void
spew_package_list (const char *name,
GSList *list)
{
GSList *tmp;
debug_spew (" %s: ", name);
tmp = list;
while (tmp != NULL)
{
Package *pkg = tmp->data;
debug_spew (" %s ", pkg->name);
tmp = tmp->next;
}
debug_spew ("\n");
}
static GSList*
packages_sort_by_path_position (GSList *list)
{
return g_slist_sort (list, pathposcmp);
}
static void
fill_one_level (Package *pkg, GetListFunc func, GSList **listp)
{
GSList *copy;
copy = g_slist_copy ((*func)(pkg));
*listp = g_slist_concat (*listp, copy);
}
static void
recursive_fill_list (Package *pkg, GetListFunc func, GSList **listp)
{
GSList *tmp;
fill_one_level (pkg, func, listp);
tmp = (*func) (pkg);
while (tmp != NULL)
{
recursive_fill_list (tmp->data, func, listp);
tmp = g_slist_next (tmp);
}
}
static void
fill_list_single_package (Package *pkg, GetListFunc func,
GSList **listp, gboolean in_path_order,
gboolean include_private)
{
/* First we get the list in natural/recursive order, then
* stable sort by path position
*/
GSList *packages;
GSList *tmp;
/* Get list of packages */
packages = NULL;
packages = g_slist_append (packages, pkg);
recursive_fill_list (pkg,
include_private ? get_requires_private : get_requires,
&packages);
if (in_path_order)
{
spew_package_list ("original", packages);
packages = packages_sort_by_path_position (packages);
spew_package_list ("sorted", packages);
}
/* Convert package list to string list */
tmp = packages;
while (tmp != NULL)
{
fill_one_level (tmp->data, func, listp);
tmp = tmp->next;
}
g_slist_free (packages);
}
static void
fill_list (GSList *packages, GetListFunc func,
GSList **listp, gboolean in_path_order, gboolean include_private)
{
GSList *tmp;
GSList *expanded;
expanded = NULL;
tmp = packages;
while (tmp != NULL)
{
expanded = g_slist_append (expanded, tmp->data);
recursive_fill_list (tmp->data,
include_private ? get_requires_private : get_requires,
&expanded);
tmp = tmp->next;
}
if (in_path_order)
{
spew_package_list ("original", expanded);
expanded = packages_sort_by_path_position (expanded);
spew_package_list ("sorted", expanded);
}
tmp = expanded;
while (tmp != NULL)
{
fill_one_level (tmp->data, func, listp);
tmp = tmp->next;
}
g_slist_free (expanded);
}
static GSList *
add_env_variable_to_list (GSList *list, const gchar *env)
{
gchar **values;
gint i;
values = g_strsplit (env, G_SEARCHPATH_SEPARATOR_S, 0);
for (i = 0; values[i] != NULL; i++)
{
list = g_slist_append (list, g_strdup (values[i]));
}
g_strfreev (values);
return list;
}
static void
verify_package (Package *pkg)
{
GSList *requires = NULL;
GSList *conflicts = NULL;
GSList *system_directories = NULL;
GSList *iter;
GSList *requires_iter;
GSList *conflicts_iter;
GSList *system_dir_iter = NULL;
int count;
const gchar *search_path;
/* Be sure we have the required fields */
if (pkg->key == NULL)
{
fprintf (stderr,
"Internal pkg-config error, package with no key, please file a bug report\n");
exit (1);
}
if (pkg->name == NULL)
{
verbose_error ("Package '%s' has no Name: field\n",
pkg->key);
exit (1);
}
if (pkg->version == NULL)
{
verbose_error ("Package '%s' has no Version: field\n",
pkg->key);
exit (1);
}
if (pkg->description == NULL)
{
verbose_error ("Package '%s' has no Description: field\n",
pkg->key);
exit (1);
}
/* Make sure we have the right version for all requirements */
iter = pkg->requires_private;
while (iter != NULL)
{
Package *req = iter->data;
RequiredVersion *ver = NULL;
if (pkg->required_versions)
ver = g_hash_table_lookup (pkg->required_versions,
req->key);
if (ver)
{
if (!version_test (ver->comparison, req->version, ver->version))
{
verbose_error ("Package '%s' requires '%s %s %s' but version of %s is %s\n",
pkg->name, req->key,
comparison_to_str (ver->comparison),
ver->version,
req->name,
req->version);
if (req->url)
verbose_error ("You may find new versions of %s at %s\n",
req->name, req->url);
exit (1);
}
}
iter = g_slist_next (iter);
}
/* Make sure we didn't drag in any conflicts via Requires
* (inefficient algorithm, who cares)
*/
recursive_fill_list (pkg, get_requires_private, &requires);
conflicts = get_conflicts (pkg);
requires_iter = requires;
while (requires_iter != NULL)
{
Package *req = requires_iter->data;
conflicts_iter = conflicts;
while (conflicts_iter != NULL)
{
RequiredVersion *ver = conflicts_iter->data;
if (strcmp (ver->name, req->key) == 0 &&
version_test (ver->comparison,
req->version,
ver->version))
{
verbose_error ("Version %s of %s creates a conflict.\n"
"(%s %s %s conflicts with %s %s)\n",
req->version, req->name,
ver->name,
comparison_to_str (ver->comparison),
ver->version ? ver->version : "(any)",
ver->owner->name,
ver->owner->version);
exit (1);
}
conflicts_iter = g_slist_next (conflicts_iter);
}
requires_iter = g_slist_next (requires_iter);
}
g_slist_free (requires);
/* We make a list of system directories that gcc expects so we can remove
* them.
*/
search_path = g_getenv ("PKG_CONFIG_SYSTEM_INCLUDE_PATH");
if (search_path == NULL)
{
search_path = PKG_CONFIG_SYSTEM_INCLUDE_PATH;
}
system_directories = add_env_variable_to_list (system_directories, search_path);
search_path = g_getenv ("C_INCLUDE_PATH");
if (search_path != NULL)
{
system_directories = add_env_variable_to_list (system_directories, search_path);
}
search_path = g_getenv ("CPLUS_INCLUDE_PATH");
if (search_path != NULL)
{
system_directories = add_env_variable_to_list (system_directories, search_path);
}
count = 0;
iter = pkg->I_cflags;
while (iter != NULL)
{
gint offset = 0;
/* we put things in canonical -I/usr/include (vs. -I /usr/include) format,
* but if someone changes it later we may as well be robust
*/
if (((strncmp (iter->data, "-I", 2) == 0) && (offset = 2))||
((strncmp (iter->data, "-I ", 3) == 0) && (offset = 3)))
{
if (offset == 0)
{
iter = iter->next;
continue;
}
system_dir_iter = system_directories;
while (system_dir_iter != NULL)
{
if (strcmp (system_dir_iter->data,
((char*)iter->data) + offset) == 0)
{
debug_spew ("Package %s has %s in Cflags\n",
pkg->name, (gchar *)iter->data);
if (g_getenv ("PKG_CONFIG_ALLOW_SYSTEM_CFLAGS") == NULL)
{
debug_spew ("Removing %s from cflags for %s\n", iter->data, pkg->key);
++count;
iter->data = NULL;
break;
}
}
system_dir_iter = system_dir_iter->next;
}
}
iter = iter->next;
}
while (count)
{
pkg->I_cflags = g_slist_remove (pkg->I_cflags, NULL);
--count;
}
g_slist_foreach (system_directories, (GFunc) g_free, NULL);
g_slist_free (system_directories);
system_directories = NULL;
search_path = g_getenv ("PKG_CONFIG_SYSTEM_LIBRARY_PATH");
if (search_path == NULL)
{
search_path = PKG_CONFIG_SYSTEM_LIBRARY_PATH;
}
system_directories = add_env_variable_to_list (system_directories, search_path);
count = 0;
iter = pkg->L_libs;
while (iter != NULL)
{
GSList *system_dir_iter = system_directories;
while (system_dir_iter != NULL)
{
gboolean is_system = FALSE;
const char *linker_arg = iter->data;
const char *system_libpath = system_dir_iter->data;
if (strncmp (linker_arg, "-L ", 3) == 0 &&
strcmp (linker_arg + 3, system_libpath) == 0)
is_system = TRUE;
else if (strncmp (linker_arg, "-L", 2) == 0 &&
strcmp (linker_arg + 2, system_libpath) == 0)
is_system = TRUE;
if (is_system)
{
debug_spew ("Package %s has -L %s in Libs\n",
pkg->name, system_libpath);
if (g_getenv ("PKG_CONFIG_ALLOW_SYSTEM_LIBS") == NULL)
{
iter->data = NULL;
++count;
debug_spew ("Removing -L %s from libs for %s\n", system_libpath, pkg->key);
break;
}
}
system_dir_iter = system_dir_iter->next;
}
iter = iter->next;
}
g_slist_free (system_directories);
while (count)
{
pkg->L_libs = g_slist_remove (pkg->L_libs, NULL);
--count;
}
}
static char*
get_merged (Package *pkg, GetListFunc func, gboolean in_path_order,
gboolean include_private)
{
GSList *list;
GSList *dups_list = NULL;
char *retval;
fill_list_single_package (pkg, func, &dups_list, in_path_order,
include_private);
list = string_list_strip_duplicates (dups_list);
g_slist_free (dups_list);
retval = string_list_to_string (list);
g_slist_free (list);
return retval;
}
static char*
get_merged_from_back (Package *pkg, GetListFunc func, gboolean in_path_order,
gboolean include_private)
{
GSList *list;
GSList *dups_list = NULL;
char *retval;
fill_list_single_package (pkg, func, &dups_list, in_path_order,
include_private);
list = string_list_strip_duplicates_from_back (dups_list);
g_slist_free (dups_list);
retval = string_list_to_string (list);
g_slist_free (list);
return retval;
}
static char*
get_multi_merged (GSList *pkgs, GetListFunc func, gboolean in_path_order,
gboolean include_private)
{
GSList *dups_list = NULL;
GSList *list;
char *retval;
fill_list (pkgs, func, &dups_list, in_path_order, include_private);
list = string_list_strip_duplicates (dups_list);
g_slist_free (dups_list);
retval = string_list_to_string (list);
g_slist_free (list);
return retval;
}
static char*
get_multi_merged_from_back (GSList *pkgs, GetListFunc func,
gboolean in_path_order, gboolean include_private)
{