diff options
Diffstat (limited to 'notmuch-config.c')
| -rw-r--r-- | notmuch-config.c | 374 |
1 files changed, 374 insertions, 0 deletions
diff --git a/notmuch-config.c b/notmuch-config.c new file mode 100644 index 0000000..0dc2b13 --- /dev/null +++ b/notmuch-config.c @@ -0,0 +1,374 @@ +/* notmuch - Not much of an email program, (just index and search) + * + * Copyright © 2009 Carl Worth + * + * 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 3 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, see http://www.gnu.org/licenses/ . + * + * Author: Carl Worth <cworth@cworth.org> + */ + +#include "notmuch-client.h" + +#include <pwd.h> +#include <netdb.h> + +struct _notmuch_config { + char *filename; + GKeyFile *key_file; + + char *database_path; + char *user_name; + char *user_primary_email; + char **user_other_email; + size_t user_other_email_length; +}; + +static int +notmuch_config_destructor (notmuch_config_t *config) +{ + if (config->key_file) + g_key_file_free (config->key_file); + + return 0; +} + +static char * +get_name_from_passwd_file (void *ctx) +{ + long pw_buf_size = sysconf(_SC_GETPW_R_SIZE_MAX); + char *pw_buf = talloc_zero_size (ctx, pw_buf_size); + struct passwd passwd, *ignored; + char *name; + + if (getpwuid_r (getuid (), &passwd, pw_buf, pw_buf_size, &ignored) == 0) { + char *comma = strchr (passwd.pw_gecos, ','); + if (comma) + name = talloc_strndup (ctx, passwd.pw_gecos, + comma - passwd.pw_gecos); + else + name = talloc_strdup (ctx, passwd.pw_gecos); + } else { + name = talloc_strdup (ctx, ""); + } + + talloc_free (pw_buf); + + return name; +} + +static char * +get_username_from_passwd_file (void *ctx) +{ + long pw_buf_size = sysconf(_SC_GETPW_R_SIZE_MAX); + char *pw_buf = talloc_zero_size (ctx, pw_buf_size); + struct passwd passwd, *ignored; + char *name; + + if (getpwuid_r (getuid (), &passwd, pw_buf, pw_buf_size, &ignored) == 0) + name = talloc_strdup (ctx, passwd.pw_name); + else + name = talloc_strdup (ctx, ""); + + talloc_free (pw_buf); + + return name; +} + +/* Open the named notmuch configuration file. A filename of NULL will + * be interpreted as the default configuration file + * ($HOME/.notmuch-config). + * + * If any error occurs, (out of memory, or a permission-denied error, + * etc.), this function will print a message to stderr and return + * NULL. + * + * Note: It is *not* an error if the specified configuration file does + * not exist. In this case, a default configuration will be created + * and returned. Subsequently calling notmuch_config_save will cause + * the configuration to be written to the filename specified at the + * time of notmuch_config_open. + * + * The default configuration settings are determined as follows: + * + * database_path: $HOME/mail + * + * user_name: From /etc/passwd + * + * user_primary_mail: $EMAIL variable if set, otherwise + * constructed from the username and + * hostname of the current machine. + * + * user_other_email: Not set. + * + * The default configuration also contains comments to guide the user + * in editing the file directly. + */ +notmuch_config_t * +notmuch_config_open (void *ctx, const char *filename) +{ + GError *error = NULL; + + notmuch_config_t *config = talloc (ctx, notmuch_config_t); + if (config == NULL) { + fprintf (stderr, "Out of memory.\n"); + return NULL; + } + + talloc_set_destructor (config, notmuch_config_destructor); + + if (filename) + config->filename = talloc_strdup (config, filename); + else + config->filename = talloc_asprintf (config, "%s/.notmuch-config", + getenv ("HOME")); + + config->key_file = g_key_file_new (); + + config->database_path = NULL; + config->user_name = NULL; + config->user_primary_email = NULL; + config->user_other_email = NULL; + config->user_other_email_length = 0; + + if (! g_key_file_load_from_file (config->key_file, + config->filename, + G_KEY_FILE_KEEP_COMMENTS, + &error)) + { + /* We are capable of dealing with a non-existent configuration + * file, so be silent about that. */ + if (!(error->domain == G_FILE_ERROR && + error->code == G_FILE_ERROR_NOENT)) + { + fprintf (stderr, "Error reading configuration file %s: %s\n", + config->filename, error->message); + talloc_free (config); + return NULL; + } + } + + if (notmuch_config_get_database_path (config) == NULL) { + char *path = talloc_asprintf (config, "%s/mail", + getenv ("HOME")); + notmuch_config_set_database_path (config, path); + talloc_free (path); + } + + if (notmuch_config_get_user_name (config) == NULL) { + char *name = get_name_from_passwd_file (config); + notmuch_config_set_user_name (config, name); + talloc_free (name); + } + + if (notmuch_config_get_user_primary_email (config) == NULL) { + char *email = getenv ("EMAIL"); + if (email) { + notmuch_config_set_user_primary_email (config, email); + } else { + char hostname[256]; + struct hostent *hostent; + const char *domainname; + + char *username = get_username_from_passwd_file (config); + + gethostname (hostname, 256); + hostname[255] = '\0'; + + hostent = gethostbyname (hostname); + if (hostent && (domainname = strchr (hostent->h_name, '.'))) + domainname += 1; + else + domainname = "(none)"; + + email = talloc_asprintf (config, "%s@%s.%s", + username, hostname, domainname); + + notmuch_config_set_user_primary_email (config, email); + + talloc_free (username); + talloc_free (email); + } + } + + return config; +} + +/* Close the given notmuch_config_t object, freeing all resources. + * + * Note: Any changes made to the configuration are *not* saved by this + * function. To save changes, call notmuch_config_save before + * notmuch_config_close. +*/ +void +notmuch_config_close (notmuch_config_t *config) +{ + talloc_free (config); +} + +/* Save any changes made to the notmuch configuration. + * + * Any comments originally in the file will be preserved. + * + * Returns 0 if successful, and 1 in case of any error, (after + * printing a description of the error to stderr). + */ +int +notmuch_config_save (notmuch_config_t *config) +{ + size_t length; + char *data; + GError *error = NULL; + + data = g_key_file_to_data (config->key_file, &length, NULL); + if (data == NULL) { + fprintf (stderr, "Out of memory.\n"); + return 1; + } + + if (! g_file_set_contents (config->filename, data, length, &error)) { + fprintf (stderr, "Error saving configuration to %s: %s\n", + config->filename, error->message); + return 1; + } + + return 0; +} + +const char * +notmuch_config_get_database_path (notmuch_config_t *config) +{ + char *path; + + if (config->database_path == NULL) { + path = g_key_file_get_string (config->key_file, + "database", "path", NULL); + if (path) { + config->database_path = talloc_strdup (config, path); + free (path); + } + } + + return config->database_path; +} + +void +notmuch_config_set_database_path (notmuch_config_t *config, + const char *database_path) +{ + g_key_file_set_string (config->key_file, + "database", "path", database_path); + + talloc_free (config->database_path); + config->database_path = NULL; +} + +const char * +notmuch_config_get_user_name (notmuch_config_t *config) +{ + char *name; + + if (config->user_name == NULL) { + name = g_key_file_get_string (config->key_file, + "user", "name", NULL); + if (name) { + config->user_name = talloc_strdup (config, name); + free (name); + } + } + + return config->user_name; +} + +void +notmuch_config_set_user_name (notmuch_config_t *config, + const char *user_name) +{ + g_key_file_set_string (config->key_file, + "user", "name", user_name); + + talloc_free (config->user_name); + config->user_name = NULL; +} + +const char * +notmuch_config_get_user_primary_email (notmuch_config_t *config) +{ + char *email; + + if (config->user_primary_email == NULL) { + email = g_key_file_get_string (config->key_file, + "user", "primary_email", NULL); + if (email) { + config->user_primary_email = talloc_strdup (config, email); + free (email); + } + } + + return config->user_primary_email; +} + +void +notmuch_config_set_user_primary_email (notmuch_config_t *config, + const char *primary_email) +{ + g_key_file_set_string (config->key_file, + "user", "primary_email", primary_email); + + talloc_free (config->user_primary_email); + config->user_primary_email = NULL; +} + +char ** +notmuch_config_get_user_other_email (notmuch_config_t *config, + size_t *length) +{ + char **emails; + size_t emails_length; + unsigned int i; + + if (config->user_other_email == NULL) { + emails = g_key_file_get_string_list (config->key_file, + "user", "other_email", + &emails_length, NULL); + if (emails) { + config->user_other_email = talloc_size (config, + sizeof (char *) * + (emails_length + 1)); + for (i = 0; i < emails_length; i++) + config->user_other_email[i] = talloc_strdup (config->user_other_email, + emails[i]); + config->user_other_email[i] = NULL; + + g_strfreev (emails); + + config->user_other_email_length = emails_length; + } + } + + *length = config->user_other_email_length; + return config->user_other_email; +} + +void +notmuch_config_set_user_other_email (notmuch_config_t *config, + const char *other_email[], + size_t length) +{ + g_key_file_set_string_list (config->key_file, + "user", "other_email", + other_email, length); + + talloc_free (config->user_other_email); + config->user_other_email = NULL; +} |