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-rw-r--r--src/util/configuration.c1287
1 files changed, 1287 insertions, 0 deletions
diff --git a/src/util/configuration.c b/src/util/configuration.c
new file mode 100644
index 0000000..f24b2c2
--- /dev/null
+++ b/src/util/configuration.c
@@ -0,0 +1,1287 @@
+/*
+ This file is part of GNUnet.
+ (C) 2006, 2007, 2008, 2009 Christian Grothoff (and other contributing authors)
+
+ GNUnet 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, or (at your
+ option) any later version.
+
+ GNUnet 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 GNUnet; see the file COPYING. If not, write to the
+ Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA.
+*/
+
+/**
+ * @file src/util/configuration.c
+ * @brief configuration management
+ *
+ * @author Christian Grothoff
+ */
+
+#include "platform.h"
+#include "gnunet_common.h"
+#include "gnunet_util_lib.h"
+#include "gnunet_crypto_lib.h"
+#include "gnunet_strings_lib.h"
+
+#define LOG(kind,...) GNUNET_log_from (kind, "util", __VA_ARGS__)
+
+#define LOG_STRERROR_FILE(kind,syscall,filename) GNUNET_log_from_strerror_file (kind, "util", syscall, filename)
+
+/**
+ * @brief configuration entry
+ */
+struct ConfigEntry
+{
+
+ /**
+ * This is a linked list.
+ */
+ struct ConfigEntry *next;
+
+ /**
+ * key for this entry
+ */
+ char *key;
+
+ /**
+ * current, commited value
+ */
+ char *val;
+};
+
+
+/**
+ * @brief configuration section
+ */
+struct ConfigSection
+{
+ /**
+ * This is a linked list.
+ */
+ struct ConfigSection *next;
+
+ /**
+ * entries in the section
+ */
+ struct ConfigEntry *entries;
+
+ /**
+ * name of the section
+ */
+ char *name;
+};
+
+
+/**
+ * @brief configuration data
+ */
+struct GNUNET_CONFIGURATION_Handle
+{
+ /**
+ * Configuration sections.
+ */
+ struct ConfigSection *sections;
+
+ /**
+ * Modification indication since last save
+ * GNUNET_NO if clean, GNUNET_YES if dirty,
+ * GNUNET_SYSERR on error (i.e. last save failed)
+ */
+ int dirty;
+
+};
+
+
+/**
+ * Used for diffing a configuration object against
+ * the default one
+ */
+struct DiffHandle
+{
+ const struct GNUNET_CONFIGURATION_Handle *cfgDefault;
+ struct GNUNET_CONFIGURATION_Handle *cfgDiff;
+};
+
+
+
+/**
+ * Create a GNUNET_CONFIGURATION_Handle.
+ *
+ * @return fresh configuration object
+ */
+struct GNUNET_CONFIGURATION_Handle *
+GNUNET_CONFIGURATION_create ()
+{
+ return GNUNET_malloc (sizeof (struct GNUNET_CONFIGURATION_Handle));
+}
+
+
+/**
+ * Destroy configuration object.
+ *
+ * @param cfg configuration to destroy
+ */
+void
+GNUNET_CONFIGURATION_destroy (struct GNUNET_CONFIGURATION_Handle *cfg)
+{
+ struct ConfigSection *sec;
+
+ while (NULL != (sec = cfg->sections))
+ GNUNET_CONFIGURATION_remove_section (cfg, sec->name);
+ GNUNET_free (cfg);
+}
+
+
+/**
+ * Parse a configuration file, add all of the options in the
+ * file to the configuration environment.
+ *
+ * @param cfg configuration to update
+ * @param filename name of the configuration file
+ * @return GNUNET_OK on success, GNUNET_SYSERR on error
+ */
+int
+GNUNET_CONFIGURATION_parse (struct GNUNET_CONFIGURATION_Handle *cfg,
+ const char *filename)
+{
+ int dirty;
+ char line[256];
+ char tag[64];
+ char value[192];
+ FILE *fp;
+ unsigned int nr;
+ int i;
+ int emptyline;
+ int ret;
+ char *section;
+ char *fn;
+
+ fn = GNUNET_STRINGS_filename_expand (filename);
+ if (fn == NULL)
+ return GNUNET_SYSERR;
+ dirty = cfg->dirty; /* back up value! */
+ if (NULL == (fp = FOPEN (fn, "r")))
+ {
+ LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_WARNING, "fopen", fn);
+ GNUNET_free (fn);
+ return GNUNET_SYSERR;
+ }
+ GNUNET_free (fn);
+ ret = GNUNET_OK;
+ section = GNUNET_strdup ("");
+ memset (line, 0, 256);
+ nr = 0;
+ while (NULL != fgets (line, 255, fp))
+ {
+ nr++;
+ for (i = 0; i < 255; i++)
+ if (line[i] == '\t')
+ line[i] = ' ';
+ if (line[0] == '\n' || line[0] == '#' || line[0] == '%' || line[0] == '\r')
+ continue;
+ emptyline = 1;
+ for (i = 0; (i < 255 && line[i] != 0); i++)
+ if (line[i] != ' ' && line[i] != '\n' && line[i] != '\r')
+ emptyline = 0;
+ if (emptyline == 1)
+ continue;
+ /* remove tailing whitespace */
+ for (i = strlen (line) - 1; (i >= 0) && (isspace ((unsigned char) line[i]));
+ i--)
+ line[i] = '\0';
+ if (1 == sscanf (line, "@INLINE@ %191[^\n]", value))
+ {
+ /* @INLINE@ value */
+ if (GNUNET_OK != GNUNET_CONFIGURATION_parse (cfg, value))
+ ret = GNUNET_SYSERR; /* failed to parse included config */
+ }
+ else if (1 == sscanf (line, "[%99[^]]]", value))
+ {
+ /* [value] */
+ GNUNET_free (section);
+ section = GNUNET_strdup (value);
+ }
+ else if (2 == sscanf (line, " %63[^= ] = %191[^\n]", tag, value))
+ {
+ /* tag = value */
+ /* Strip LF */
+ i = strlen (value) - 1;
+ while ((i >= 0) && (isspace ((unsigned char) value[i])))
+ value[i--] = '\0';
+ /* remove quotes */
+ i = 0;
+ if (value[0] == '"')
+ {
+ i = 1;
+ while ((value[i] != '\0') && (value[i] != '"'))
+ i++;
+ if (value[i] == '"')
+ {
+ value[i] = '\0';
+ i = 1;
+ }
+ else
+ i = 0;
+ }
+ GNUNET_CONFIGURATION_set_value_string (cfg, section, tag, &value[i]);
+ }
+ else if (1 == sscanf (line, " %63[^= ] =[^\n]", tag))
+ {
+ /* tag = */
+ GNUNET_CONFIGURATION_set_value_string (cfg, section, tag, "");
+ }
+ else
+ {
+ /* parse error */
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ _("Syntax error in configuration file `%s' at line %u.\n"), filename,
+ nr);
+ ret = GNUNET_SYSERR;
+ break;
+ }
+ }
+ GNUNET_assert (0 == FCLOSE (fp));
+ /* restore dirty flag - anything we set in the meantime
+ * came from disk */
+ cfg->dirty = dirty;
+ GNUNET_free (section);
+ return ret;
+}
+
+
+/**
+ * Test if there are configuration options that were
+ * changed since the last save.
+ *
+ * @param cfg configuration to inspect
+ * @return GNUNET_NO if clean, GNUNET_YES if dirty, GNUNET_SYSERR on error (i.e. last save failed)
+ */
+int
+GNUNET_CONFIGURATION_is_dirty (const struct GNUNET_CONFIGURATION_Handle *cfg)
+{
+ return cfg->dirty;
+}
+
+
+/**
+ * Write configuration file.
+ *
+ * @param cfg configuration to write
+ * @param filename where to write the configuration
+ * @return GNUNET_OK on success, GNUNET_SYSERR on error
+ */
+int
+GNUNET_CONFIGURATION_write (struct GNUNET_CONFIGURATION_Handle *cfg,
+ const char *filename)
+{
+ struct ConfigSection *sec;
+ struct ConfigEntry *ent;
+ FILE *fp;
+ int error;
+ char *fn;
+ char *val;
+ char *pos;
+
+ fn = GNUNET_STRINGS_filename_expand (filename);
+ if (fn == NULL)
+ return GNUNET_SYSERR;
+ if (GNUNET_OK != GNUNET_DISK_directory_create_for_file (fn))
+ {
+ GNUNET_free (fn);
+ return GNUNET_SYSERR;
+ }
+ if (NULL == (fp = FOPEN (fn, "w")))
+ {
+ LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_WARNING, "fopen", fn);
+ GNUNET_free (fn);
+ return GNUNET_SYSERR;
+ }
+ GNUNET_free (fn);
+ error = 0;
+ sec = cfg->sections;
+ while (sec != NULL)
+ {
+ if (0 > FPRINTF (fp, "[%s]\n", sec->name))
+ {
+ error = 1;
+ break;
+ }
+ ent = sec->entries;
+ while (ent != NULL)
+ {
+ if (ent->val != NULL)
+ {
+ val = GNUNET_malloc (strlen (ent->val) * 2 + 1);
+ strcpy (val, ent->val);
+ while (NULL != (pos = strstr (val, "\n")))
+ {
+ memmove (&pos[2], &pos[1], strlen (&pos[1]));
+ pos[0] = '\\';
+ pos[1] = 'n';
+ }
+ if (0 > FPRINTF (fp, "%s = %s\n", ent->key, val))
+ {
+ error = 1;
+ GNUNET_free (val);
+ break;
+ }
+ GNUNET_free (val);
+ }
+ ent = ent->next;
+ }
+ if (error != 0)
+ break;
+ if (0 > FPRINTF (fp, "%s\n", ""))
+ {
+ error = 1;
+ break;
+ }
+ sec = sec->next;
+ }
+ if (error != 0)
+ LOG_STRERROR_FILE (GNUNET_ERROR_TYPE_WARNING, "fprintf", filename);
+ GNUNET_assert (0 == FCLOSE (fp));
+ if (error != 0)
+ {
+ cfg->dirty = GNUNET_SYSERR; /* last write failed */
+ return GNUNET_SYSERR;
+ }
+ cfg->dirty = GNUNET_NO; /* last write succeeded */
+ return GNUNET_OK;
+}
+
+
+/**
+ * Iterate over all options in the configuration.
+ *
+ * @param cfg configuration to inspect
+ * @param iter function to call on each option
+ * @param iter_cls closure for iter
+ */
+void
+GNUNET_CONFIGURATION_iterate (const struct GNUNET_CONFIGURATION_Handle *cfg,
+ GNUNET_CONFIGURATION_Iterator iter,
+ void *iter_cls)
+{
+ struct ConfigSection *spos;
+ struct ConfigEntry *epos;
+
+ spos = cfg->sections;
+ while (spos != NULL)
+ {
+ epos = spos->entries;
+ while (epos != NULL)
+ {
+ iter (iter_cls, spos->name, epos->key, epos->val);
+ epos = epos->next;
+ }
+ spos = spos->next;
+ }
+}
+
+
+/**
+ * Iterate over values of a section in the configuration.
+ *
+ * @param cfg configuration to inspect
+ * @param section the section
+ * @param iter function to call on each option
+ * @param iter_cls closure for iter
+ */
+void
+GNUNET_CONFIGURATION_iterate_section_values (const struct
+ GNUNET_CONFIGURATION_Handle *cfg,
+ const char *section,
+ GNUNET_CONFIGURATION_Iterator iter,
+ void *iter_cls)
+{
+ struct ConfigSection *spos;
+ struct ConfigEntry *epos;
+
+ spos = cfg->sections;
+ while ((spos != NULL) && (0 != strcasecmp (spos->name, section)))
+ spos = spos->next;
+
+ if (spos == NULL)
+ return;
+
+ epos = spos->entries;
+ while (epos != NULL)
+ {
+ iter (iter_cls, spos->name, epos->key, epos->val);
+ epos = epos->next;
+ }
+}
+
+
+/**
+ * Iterate over all sections in the configuration.
+ *
+ * @param cfg configuration to inspect
+ * @param iter function to call on each section
+ * @param iter_cls closure for iter
+ */
+void
+GNUNET_CONFIGURATION_iterate_sections (const struct GNUNET_CONFIGURATION_Handle
+ *cfg,
+ GNUNET_CONFIGURATION_Section_Iterator
+ iter, void *iter_cls)
+{
+ struct ConfigSection *spos;
+ struct ConfigSection *next;
+
+ next = cfg->sections;
+ while (next != NULL)
+ {
+ spos = next;
+ next = spos->next;
+ iter (iter_cls, spos->name);
+ }
+}
+
+/**
+ * Remove the given section and all options in it.
+ *
+ * @param cfg configuration to inspect
+ * @param section name of the section to remove
+ */
+void
+GNUNET_CONFIGURATION_remove_section (struct GNUNET_CONFIGURATION_Handle *cfg,
+ const char *section)
+{
+ struct ConfigSection *spos;
+ struct ConfigSection *prev;
+ struct ConfigEntry *ent;
+
+ prev = NULL;
+ spos = cfg->sections;
+ while (spos != NULL)
+ {
+ if (0 == strcasecmp (section, spos->name))
+ {
+ if (prev == NULL)
+ cfg->sections = spos->next;
+ else
+ prev->next = spos->next;
+ while (NULL != (ent = spos->entries))
+ {
+ spos->entries = ent->next;
+ GNUNET_free (ent->key);
+ GNUNET_free_non_null (ent->val);
+ GNUNET_free (ent);
+ cfg->dirty = GNUNET_YES;
+ }
+ GNUNET_free (spos->name);
+ GNUNET_free (spos);
+ return;
+ }
+ prev = spos;
+ spos = spos->next;
+ }
+}
+
+
+/**
+ * Copy a configuration value to the given target configuration.
+ * Overwrites existing entries.
+ *
+ * @param cls the destination configuration (struct GNUNET_CONFIGURATION_Handle*)
+ * @param section section for the value
+ * @param option option name of the value
+ * @param value value to copy
+ */
+static void
+copy_entry (void *cls, const char *section, const char *option,
+ const char *value)
+{
+ struct GNUNET_CONFIGURATION_Handle *dst = cls;
+
+ GNUNET_CONFIGURATION_set_value_string (dst, section, option, value);
+}
+
+
+/**
+ * Duplicate an existing configuration object.
+ *
+ * @param cfg configuration to duplicate
+ * @return duplicate configuration
+ */
+struct GNUNET_CONFIGURATION_Handle *
+GNUNET_CONFIGURATION_dup (const struct GNUNET_CONFIGURATION_Handle *cfg)
+{
+ struct GNUNET_CONFIGURATION_Handle *ret;
+
+ ret = GNUNET_CONFIGURATION_create ();
+ GNUNET_CONFIGURATION_iterate (cfg, &copy_entry, ret);
+ return ret;
+}
+
+
+/**
+ * FIXME.
+ *
+ * @param cfg FIXME
+ * @param section FIXME
+ * @return matching entry, NULL if not found
+ */
+static struct ConfigSection *
+findSection (const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section)
+{
+ struct ConfigSection *pos;
+
+ pos = cfg->sections;
+ while ((pos != NULL) && (0 != strcasecmp (section, pos->name)))
+ pos = pos->next;
+ return pos;
+}
+
+
+/**
+ * Find an entry from a configuration.
+ *
+ * @param cfg handle to the configuration
+ * @param section section the option is in
+ * @param key the option
+ * @return matching entry, NULL if not found
+ */
+static struct ConfigEntry *
+findEntry (const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section,
+ const char *key)
+{
+ struct ConfigSection *sec;
+ struct ConfigEntry *pos;
+
+ sec = findSection (cfg, section);
+ if (sec == NULL)
+ return NULL;
+ pos = sec->entries;
+ while ((pos != NULL) && (0 != strcasecmp (key, pos->key)))
+ pos = pos->next;
+ return pos;
+}
+
+
+/**
+ * A callback function, compares entries from two configurations
+ * (default against a new configuration) and write the diffs in a
+ * diff-configuration object (the callback object).
+ *
+ * @param cls the diff configuration (struct DiffHandle*)
+ * @param section section for the value (of the default conf.)
+ * @param option option name of the value (of the default conf.)
+ * @param value value to copy (of the default conf.)
+ */
+static void
+compareEntries (void *cls, const char *section, const char *option,
+ const char *value)
+{
+ struct DiffHandle *dh = cls;
+ struct ConfigEntry *entNew;
+
+ entNew = findEntry (dh->cfgDefault, section, option);
+ if ((entNew != NULL) && (strcmp (entNew->val, value) == 0))
+ return;
+ GNUNET_CONFIGURATION_set_value_string (dh->cfgDiff, section, option, value);
+}
+
+
+/**
+ * Write only configuration entries that have been changed to configuration file
+ * @param cfgDefault default configuration
+ * @param cfgNew new configuration
+ * @param filename where to write the configuration diff between default and new
+ * @return GNUNET_OK on success, GNUNET_SYSERR on error
+ */
+int
+GNUNET_CONFIGURATION_write_diffs (const struct GNUNET_CONFIGURATION_Handle
+ *cfgDefault,
+ const struct GNUNET_CONFIGURATION_Handle
+ *cfgNew, const char *filename)
+{
+ int ret;
+ struct DiffHandle diffHandle;
+
+ diffHandle.cfgDiff = GNUNET_CONFIGURATION_create ();
+ diffHandle.cfgDefault = cfgDefault;
+ GNUNET_CONFIGURATION_iterate (cfgNew, compareEntries, &diffHandle);
+ ret = GNUNET_CONFIGURATION_write (diffHandle.cfgDiff, filename);
+ GNUNET_CONFIGURATION_destroy (diffHandle.cfgDiff);
+ return ret;
+}
+
+
+/**
+ * Set a configuration value that should be a string.
+ *
+ * @param cfg configuration to update
+ * @param section section of interest
+ * @param option option of interest
+ * @param value value to set
+ */
+void
+GNUNET_CONFIGURATION_set_value_string (struct GNUNET_CONFIGURATION_Handle *cfg,
+ const char *section, const char *option,
+ const char *value)
+{
+ struct ConfigSection *sec;
+ struct ConfigEntry *e;
+
+ e = findEntry (cfg, section, option);
+ if (e != NULL)
+ {
+ GNUNET_free_non_null (e->val);
+ e->val = GNUNET_strdup (value);
+ return;
+ }
+ sec = findSection (cfg, section);
+ if (sec == NULL)
+ {
+ sec = GNUNET_malloc (sizeof (struct ConfigSection));
+ sec->name = GNUNET_strdup (section);
+ sec->next = cfg->sections;
+ cfg->sections = sec;
+ }
+ e = GNUNET_malloc (sizeof (struct ConfigEntry));
+ e->key = GNUNET_strdup (option);
+ e->val = GNUNET_strdup (value);
+ e->next = sec->entries;
+ sec->entries = e;
+}
+
+
+/**
+ * Set a configuration value that should be a number.
+ *
+ * @param cfg configuration to update
+ * @param section section of interest
+ * @param option option of interest
+ * @param number value to set
+ */
+void
+GNUNET_CONFIGURATION_set_value_number (struct GNUNET_CONFIGURATION_Handle *cfg,
+ const char *section, const char *option,
+ unsigned long long number)
+{
+ char s[64];
+
+ GNUNET_snprintf (s, 64, "%llu", number);
+ GNUNET_CONFIGURATION_set_value_string (cfg, section, option, s);
+}
+
+
+/**
+ * Get a configuration value that should be a number.
+ *
+ * @param cfg configuration to inspect
+ * @param section section of interest
+ * @param option option of interest
+ * @param number where to store the numeric value of the option
+ * @return GNUNET_OK on success, GNUNET_SYSERR on error
+ */
+int
+GNUNET_CONFIGURATION_get_value_number (const struct GNUNET_CONFIGURATION_Handle
+ *cfg, const char *section,
+ const char *option,
+ unsigned long long *number)
+{
+ struct ConfigEntry *e;
+
+ e = findEntry (cfg, section, option);
+ if (e == NULL)
+ return GNUNET_SYSERR;
+ if (1 != SSCANF (e->val, "%llu", number))
+ return GNUNET_SYSERR;
+ return GNUNET_OK;
+}
+
+
+/**
+ * Get a configuration value that should be a relative time.
+ *
+ * @param cfg configuration to inspect
+ * @param section section of interest
+ * @param option option of interest
+ * @param time set to the time value stored in the configuration
+ * @return GNUNET_OK on success, GNUNET_SYSERR on error
+ */
+int
+GNUNET_CONFIGURATION_get_value_time (const struct GNUNET_CONFIGURATION_Handle
+ *cfg, const char *section,
+ const char *option,
+ struct GNUNET_TIME_Relative *time)
+{
+ struct ConfigEntry *e;
+
+ e = findEntry (cfg, section, option);
+ if (e == NULL)
+ return GNUNET_SYSERR;
+
+ return GNUNET_STRINGS_fancy_time_to_relative (e->val, time);
+}
+
+
+/**
+ * Get a configuration value that should be a size in bytes.
+ *
+ * @param cfg configuration to inspect
+ * @param section section of interest
+ * @param option option of interest
+ * @param size set to the size in bytes as stored in the configuration
+ * @return GNUNET_OK on success, GNUNET_SYSERR on error
+ */
+int
+GNUNET_CONFIGURATION_get_value_size (const struct GNUNET_CONFIGURATION_Handle
+ *cfg, const char *section,
+ const char *option,
+ unsigned long long *size)
+{
+ struct ConfigEntry *e;
+
+ e = findEntry (cfg, section, option);
+ if (e == NULL)
+ return GNUNET_SYSERR;
+ return GNUNET_STRINGS_fancy_size_to_bytes (e->val, size);
+}
+
+
+/**
+ * Get a configuration value that should be a string.
+ *
+ * @param cfg configuration to inspect
+ * @param section section of interest
+ * @param option option of interest
+ * @param value will be set to a freshly allocated configuration
+ * value, or NULL if option is not specified
+ * @return GNUNET_OK on success, GNUNET_SYSERR on error
+ */
+int
+GNUNET_CONFIGURATION_get_value_string (const struct GNUNET_CONFIGURATION_Handle
+ *cfg, const char *section,
+ const char *option, char **value)
+{
+ struct ConfigEntry *e;
+
+ e = findEntry (cfg, section, option);
+ if ((e == NULL) || (e->val == NULL))
+ {
+ *value = NULL;
+ return GNUNET_SYSERR;
+ }
+ *value = GNUNET_strdup (e->val);
+ return GNUNET_OK;
+}
+
+
+/**
+ * Get a configuration value that should be in a set of
+ * predefined strings
+ *
+ * @param cfg configuration to inspect
+ * @param section section of interest
+ * @param option option of interest
+ * @param choices NULL-terminated list of legal values
+ * @param value will be set to an entry in the legal list,
+ * or NULL if option is not specified and no default given
+ * @return GNUNET_OK on success, GNUNET_SYSERR on error
+ */
+int
+GNUNET_CONFIGURATION_get_value_choice (const struct GNUNET_CONFIGURATION_Handle
+ *cfg, const char *section,
+ const char *option, const char **choices,
+ const char **value)
+{
+ struct ConfigEntry *e;
+ int i;
+
+ e = findEntry (cfg, section, option);
+ if (e == NULL)
+ return GNUNET_SYSERR;
+ i = 0;
+ while (choices[i] != NULL)
+ {
+ if (0 == strcasecmp (choices[i], e->val))
+ break;
+ i++;
+ }
+ if (choices[i] == NULL)
+ {
+ LOG (GNUNET_ERROR_TYPE_ERROR,
+ _("Configuration value '%s' for '%s'"
+ " in section '%s' is not in set of legal choices\n"), e->val, option,
+ section);
+ return GNUNET_SYSERR;
+ }
+ *value = choices[i];
+ return GNUNET_OK;
+}
+
+
+/**
+ * Test if we have a value for a particular option
+ * @param cfg configuration to inspect
+ * @param section section of interest
+ * @param option option of interest
+ * @return GNUNET_YES if so, GNUNET_NO if not.
+ */
+int
+GNUNET_CONFIGURATION_have_value (const struct GNUNET_CONFIGURATION_Handle *cfg,
+ const char *section, const char *option)
+{
+ struct ConfigEntry *e;
+
+ if ((NULL == (e = findEntry (cfg, section, option))) || (e->val == NULL))
+ return GNUNET_NO;
+ return GNUNET_YES;
+}
+
+
+/**
+ * Expand an expression of the form "$FOO/BAR" to "DIRECTORY/BAR"
+ * where either in the "PATHS" section or the environtment
+ * "FOO" is set to "DIRECTORY".
+ *
+ * @param cfg configuration to use for path expansion
+ * @param orig string to $-expand (will be freed!)
+ * @return $-expanded string
+ */
+char *
+GNUNET_CONFIGURATION_expand_dollar (const struct GNUNET_CONFIGURATION_Handle
+ *cfg, char *orig)
+{
+ int i;
+ char *prefix;
+ char *result;
+ const char *post;
+ const char *env;
+
+ if (orig[0] != '$')
+ return orig;
+ i = 0;
+ while ((orig[i] != '/') && (orig[i] != '\\') && (orig[i] != '\0'))
+ i++;
+ if (orig[i] == '\0')
+ {
+ post = "";
+ }
+ else
+ {
+ orig[i] = '\0';
+ post = &orig[i + 1];
+ }
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_filename (cfg, "PATHS", &orig[1], &prefix))
+ {
+ if (NULL == (env = getenv (&orig[1])))
+ {
+ orig[i] = DIR_SEPARATOR;
+ return orig;
+ }
+ prefix = GNUNET_strdup (env);
+ }
+ result = GNUNET_malloc (strlen (prefix) + strlen (post) + 2);
+ strcpy (result, prefix);
+ if ((strlen (prefix) == 0) ||
+ ((prefix[strlen (prefix) - 1] != DIR_SEPARATOR) && (strlen (post) > 0)))
+ strcat (result, DIR_SEPARATOR_STR);
+ strcat (result, post);
+ GNUNET_free (prefix);
+ GNUNET_free (orig);
+ return result;
+}
+
+
+/**
+ * Get a configuration value that should be a string.
+ *
+ * @param cfg configuration to inspect
+ * @param section section of interest
+ * @param option option of interest
+ * @param value will be set to a freshly allocated configuration
+ * value, or NULL if option is not specified
+ * @return GNUNET_OK on success, GNUNET_SYSERR on error
+ */
+int
+GNUNET_CONFIGURATION_get_value_filename (const struct
+ GNUNET_CONFIGURATION_Handle *cfg,
+ const char *section,
+ const char *option, char **value)
+{
+ char *tmp;
+
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_string (cfg, section, option, &tmp))
+ {
+ *value = NULL;
+ return GNUNET_SYSERR;
+ }
+ tmp = GNUNET_CONFIGURATION_expand_dollar (cfg, tmp);
+ *value = GNUNET_STRINGS_filename_expand (tmp);
+ GNUNET_free (tmp);
+ if (*value == NULL)
+ return GNUNET_SYSERR;
+ return GNUNET_OK;
+}
+
+
+/**
+ * Get a configuration value that should be in a set of
+ * "GNUNET_YES" or "GNUNET_NO".
+ *
+ * @param cfg configuration to inspect
+ * @param section section of interest
+ * @param option option of interest
+ * @return GNUNET_YES, GNUNET_NO or GNUNET_SYSERR
+ */
+int
+GNUNET_CONFIGURATION_get_value_yesno (const struct GNUNET_CONFIGURATION_Handle
+ *cfg, const char *section,
+ const char *option)
+{
+ static const char *yesno[] = { "YES", "NO", NULL };
+ const char *val;
+ int ret;
+
+ ret =
+ GNUNET_CONFIGURATION_get_value_choice (cfg, section, option, yesno, &val);
+ if (ret == GNUNET_SYSERR)
+ return ret;
+ if (val == yesno[0])
+ return GNUNET_YES;
+ return GNUNET_NO;
+}
+
+
+/**
+ * Iterate over the set of filenames stored in a configuration value.
+ *
+ * @param cfg configuration to inspect
+ * @param section section of interest
+ * @param option option of interest
+ * @param cb function to call on each filename
+ * @param cb_cls closure for cb
+ * @return number of filenames iterated over, -1 on error
+ */
+int
+GNUNET_CONFIGURATION_iterate_value_filenames (const struct
+ GNUNET_CONFIGURATION_Handle *cfg,
+ const char *section,
+ const char *option,
+ GNUNET_FileNameCallback cb,
+ void *cb_cls)
+{
+ char *list;
+ char *pos;
+ char *end;
+ char old;
+ int ret;
+
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_string (cfg, section, option, &list))
+ return 0;
+ GNUNET_assert (list != NULL);
+ ret = 0;
+ pos = list;
+ while (1)
+ {
+ while (pos[0] == ' ')
+ pos++;
+ if (strlen (pos) == 0)
+ break;
+ end = pos + 1;
+ while ((end[0] != ' ') && (end[0] != '\0'))
+ {
+ if (end[0] == '\\')
+ {
+ switch (end[1])
+ {
+ case '\\':
+ case ' ':
+ memmove (end, &end[1], strlen (&end[1]) + 1);
+ case '\0':
+ /* illegal, but just keep it */
+ break;
+ default:
+ /* illegal, but just ignore that there was a '/' */
+ break;
+ }
+ }
+ end++;
+ }
+ old = end[0];
+ end[0] = '\0';
+ if (strlen (pos) > 0)
+ {
+ ret++;
+ if ((cb != NULL) && (GNUNET_OK != cb (cb_cls, pos)))
+ {
+ ret = GNUNET_SYSERR;
+ break;
+ }
+ }
+ if (old == '\0')
+ break;
+ pos = end + 1;
+ }
+ GNUNET_free (list);
+ return ret;
+}
+
+
+/**
+ * FIXME.
+ *
+ * @param value FIXME
+ * @return FIXME
+ */
+static char *
+escape_name (const char *value)
+{
+ char *escaped;
+ const char *rpos;
+ char *wpos;
+
+ escaped = GNUNET_malloc (strlen (value) * 2 + 1);
+ memset (escaped, 0, strlen (value) * 2 + 1);
+ rpos = value;
+ wpos = escaped;
+ while (rpos[0] != '\0')
+ {
+ switch (rpos[0])
+ {
+ case '\\':
+ case ' ':
+ wpos[0] = '\\';
+ wpos[1] = rpos[0];
+ wpos += 2;
+ break;
+ default:
+ wpos[0] = rpos[0];
+ wpos++;
+ }
+ rpos++;
+ }
+ return escaped;
+}
+
+
+/**
+ * FIXME.
+ *
+ * @param cls string we compare with (const char*)
+ * @param fn filename we are currently looking at
+ * @return GNUNET_OK if the names do not match, GNUNET_SYSERR if they do
+ */
+static int
+test_match (void *cls, const char *fn)
+{
+ const char *of = cls;
+
+ return (0 == strcmp (of, fn)) ? GNUNET_SYSERR : GNUNET_OK;
+}
+
+
+/**
+ * Append a filename to a configuration value that
+ * represents a list of filenames
+ *
+ * @param cfg configuration to update
+ * @param section section of interest
+ * @param option option of interest
+ * @param value filename to append
+ * @return GNUNET_OK on success,
+ * GNUNET_NO if the filename already in the list
+ * GNUNET_SYSERR on error
+ */
+int
+GNUNET_CONFIGURATION_append_value_filename (struct GNUNET_CONFIGURATION_Handle
+ *cfg, const char *section,
+ const char *option,
+ const char *value)
+{
+ char *escaped;
+ char *old;
+ char *nw;
+
+ if (GNUNET_SYSERR ==
+ GNUNET_CONFIGURATION_iterate_value_filenames (cfg, section, option,
+ &test_match,
+ (void *) value))
+ return GNUNET_NO; /* already exists */
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_string (cfg, section, option, &old))
+ old = GNUNET_strdup ("");
+ escaped = escape_name (value);
+ nw = GNUNET_malloc (strlen (old) + strlen (escaped) + 2);
+ strcpy (nw, old);
+ if (strlen (old) > 0)
+ strcat (nw, " ");
+ strcat (nw, escaped);
+ GNUNET_CONFIGURATION_set_value_string (cfg, section, option, nw);
+ GNUNET_free (old);
+ GNUNET_free (nw);
+ GNUNET_free (escaped);
+ return GNUNET_OK;
+}
+
+
+/**
+ * Remove a filename from a configuration value that
+ * represents a list of filenames
+ *
+ * @param cfg configuration to update
+ * @param section section of interest
+ * @param option option of interest
+ * @param value filename to remove
+ * @return GNUNET_OK on success,
+ * GNUNET_NO if the filename is not in the list,
+ * GNUNET_SYSERR on error
+ */
+int
+GNUNET_CONFIGURATION_remove_value_filename (struct GNUNET_CONFIGURATION_Handle
+ *cfg, const char *section,
+ const char *option,
+ const char *value)
+{
+ char *list;
+ char *pos;
+ char *end;
+ char *match;
+ char old;
+
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_string (cfg, section, option, &list))
+ return GNUNET_NO;
+ match = escape_name (value);
+ pos = list;
+ while (1)
+ {
+ while (pos[0] == ' ')
+ pos++;
+ if (strlen (pos) == 0)
+ break;
+ end = pos + 1;
+ while ((end[0] != ' ') && (end[0] != '\0'))
+ {
+ if (end[0] == '\\')
+ {
+ switch (end[1])
+ {
+ case '\\':
+ case ' ':
+ end++;
+ break;
+ case '\0':
+ /* illegal, but just keep it */
+ break;
+ default:
+ /* illegal, but just ignore that there was a '/' */
+ break;
+ }
+ }
+ end++;
+ }
+ old = end[0];
+ end[0] = '\0';
+ if (0 == strcmp (pos, match))
+ {
+ if (old != '\0')
+ memmove (pos, &end[1], strlen (&end[1]) + 1);
+ else
+ {
+ if (pos != list)
+ pos[-1] = '\0';
+ else
+ pos[0] = '\0';
+ }
+ GNUNET_CONFIGURATION_set_value_string (cfg, section, option, list);
+ GNUNET_free (list);
+ GNUNET_free (match);
+ return GNUNET_OK;
+ }
+ if (old == '\0')
+ break;
+ end[0] = old;
+ pos = end + 1;
+ }
+ GNUNET_free (list);
+ GNUNET_free (match);
+ return GNUNET_NO;
+}
+
+
+/**
+ * Wrapper around GNUNET_CONFIGURATION_parse.
+ *
+ * @param cls the cfg
+ * @param filename file to parse
+ * @return GNUNET_OK on success
+ */
+static int
+parse_configuration_file (void *cls, const char *filename)
+{
+ struct GNUNET_CONFIGURATION_Handle *cfg = cls;
+ int ret;
+
+ ret = GNUNET_CONFIGURATION_parse (cfg, filename);
+ return ret;
+}
+
+
+/**
+ * Load configuration (starts with defaults, then loads
+ * system-specific configuration).
+ *
+ * @param cfg configuration to update
+ * @param filename name of the configuration file, NULL to load defaults
+ * @return GNUNET_OK on success, GNUNET_SYSERR on error
+ */
+int
+GNUNET_CONFIGURATION_load (struct GNUNET_CONFIGURATION_Handle *cfg,
+ const char *filename)
+{
+ char *baseconfig;
+ char *ipath;
+
+ ipath = GNUNET_OS_installation_get_path (GNUNET_OS_IPK_DATADIR);
+ if (ipath == NULL)
+ return GNUNET_SYSERR;
+ baseconfig = NULL;
+ GNUNET_asprintf (&baseconfig, "%s%s", ipath, "config.d");
+ GNUNET_free (ipath);
+ if (GNUNET_SYSERR ==
+ GNUNET_DISK_directory_scan (baseconfig, &parse_configuration_file, cfg))
+ {
+ GNUNET_free (baseconfig);
+ return GNUNET_SYSERR; /* no configuration at all found */
+ }
+ GNUNET_free (baseconfig);
+ if ((filename != NULL) &&
+ (GNUNET_OK != GNUNET_CONFIGURATION_parse (cfg, filename)))
+ {
+ /* specified configuration not found */
+ return GNUNET_SYSERR;
+ }
+ if (((GNUNET_YES !=
+ GNUNET_CONFIGURATION_have_value (cfg, "PATHS", "DEFAULTCONFIG"))) &&
+ (filename != NULL))
+ GNUNET_CONFIGURATION_set_value_string (cfg, "PATHS", "DEFAULTCONFIG",
+ filename);
+ if ((GNUNET_YES ==
+ GNUNET_CONFIGURATION_have_value (cfg, "TESTING", "WEAKRANDOM")) &&
+ (GNUNET_YES ==
+ GNUNET_CONFIGURATION_get_value_yesno (cfg, "TESTING", "WEAKRANDOM")))
+ GNUNET_CRYPTO_random_disable_entropy_gathering ();
+ return GNUNET_OK;
+}
+
+
+
+/* end of configuration.c */
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-11-21 20:02:55 +0000