X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fbin%2Flttng%2Fconf.c;fp=src%2Fbin%2Flttng%2Fconf.c;h=0000000000000000000000000000000000000000;hp=4079d6ed9421273680d102d4bc9cf9353534dfb6;hb=48a4000561343808724f7cb5fa8c131877489ccd;hpb=81663f073dbfb4b61c06a0ceb8ca33c4fc41b1c5 diff --git a/src/bin/lttng/conf.c b/src/bin/lttng/conf.c deleted file mode 100644 index 4079d6ed9..000000000 --- a/src/bin/lttng/conf.c +++ /dev/null @@ -1,318 +0,0 @@ -/* - * Copyright (C) 2011 David Goulet - * - * SPDX-License-Identifier: GPL-2.0-only - * - */ - -#define _LGPL_SOURCE -#include -#include -#include -#include -#include -#include -#include - -#include -#include -#include - -#include "conf.h" - -/* - * Returns the path with '/CONFIG_FILENAME' added to it; - * path will be NULL if an error occurs. - */ -char *config_get_file_path(const char *path) -{ - int ret; - char *file_path; - - ret = asprintf(&file_path, "%s/%s", path, CONFIG_FILENAME); - if (ret < 0) { - ERR("Fail allocating config file path"); - file_path = NULL; - } - - return file_path; -} - -/* - * Returns an open FILE pointer to the config file; - * on error, NULL is returned. - */ -static FILE *open_config(const char *path, const char *mode) -{ - FILE *fp = NULL; - char *file_path; - - file_path = config_get_file_path(path); - if (file_path == NULL) { - goto error; - } - - fp = fopen(file_path, mode); - if (fp == NULL) { - goto error; - } - -error: - free(file_path); - return fp; -} - -/* - * Creates the empty config file at the path. - * On success, returns 0; - * on error, returns -1. - */ -static int create_config_file(const char *path) -{ - int ret; - FILE *fp; - - fp = open_config(path, "w+"); - if (fp == NULL) { - ERR("Unable to create config file"); - ret = -1; - goto error; - } - - ret = fclose(fp); - -error: - return ret; -} - -/* - * Append data to the config file in file_path - * On success, returns 0; - * on error, returns -1. - */ -static int write_config(const char *file_path, size_t size, char *data) -{ - FILE *fp; - size_t len; - int ret = 0; - - fp = open_config(file_path, "a"); - if (fp == NULL) { - ret = -1; - goto end; - } - - /* Write session name into config file */ - len = fwrite(data, size, 1, fp); - if (len != 1) { - ret = -1; - } - if (fclose(fp)) { - PERROR("close write_config"); - } -end: - return ret; -} - -/* - * Destroys directory config and file config. - */ -void config_destroy(const char *path) -{ - int ret; - char *config_path; - - config_path = config_get_file_path(path); - if (config_path == NULL) { - return; - } - - if (!config_exists(config_path)) { - goto end; - } - - DBG("Removing %s\n", config_path); - ret = remove(config_path); - if (ret < 0) { - PERROR("remove config file"); - } -end: - free(config_path); -} - -/* - * Destroys the default config - */ -void config_destroy_default(void) -{ - const char *path = utils_get_home_dir(); - if (path == NULL) { - return; - } - config_destroy(path); -} - -/* - * Returns 1 if config exists, 0 otherwise - */ -int config_exists(const char *path) -{ - int ret; - struct stat info; - - ret = stat(path, &info); - if (ret < 0) { - return 0; - } - return S_ISREG(info.st_mode) || S_ISDIR(info.st_mode); -} - -static -int _config_read_session_name(const char *path, char **name) -{ - int ret = 0; - FILE *fp; - char var[NAME_MAX], *session_name; - -#if (NAME_MAX == 255) -#define NAME_MAX_SCANF_IS_A_BROKEN_API "254" -#endif - - session_name = zmalloc(NAME_MAX); - if (session_name == NULL) { - ret = -ENOMEM; - ERR("Out of memory"); - goto error; - } - - fp = open_config(path, "r"); - if (fp == NULL) { - ret = -ENOENT; - goto error; - } - - while (!feof(fp)) { - if ((ret = fscanf(fp, "%" NAME_MAX_SCANF_IS_A_BROKEN_API - "[^'=']=%" NAME_MAX_SCANF_IS_A_BROKEN_API "s\n", - var, session_name)) != 2) { - if (ret == -1) { - ERR("Missing session=NAME in config file."); - goto error_close; - } - continue; - } - - if (strcmp(var, "session") == 0) { - goto found; - } - } - -error_close: - if (fclose(fp) < 0) { - PERROR("close config read session name"); - } -error: - free(session_name); - return ret; -found: - *name = session_name; - if (fclose(fp) < 0) { - PERROR("close config read session name found"); - } - return ret; -} - -/* - * Returns the session name from the config file. - * - * The caller is responsible for freeing the returned string. - * On error, NULL is returned. - */ -char *config_read_session_name(const char *path) -{ - int ret; - char *name = NULL; - - ret = _config_read_session_name(path, &name); - if (ret == -ENOENT) { - const char *home_dir = utils_get_home_dir(); - - ERR("Can't find valid lttng config %s/.lttngrc", home_dir); - MSG("Did you create a session? (lttng create )"); - } - - return name; -} - -/* - * Returns the session name from the config file. (no warnings/errors emitted) - * - * The caller is responsible for freeing the returned string. - * On error, NULL is returned. - */ -char *config_read_session_name_quiet(const char *path) -{ - char *name = NULL; - - (void) _config_read_session_name(path, &name); - return name; -} - -/* - * Write session name option to the config file. - * On success, returns 0; - * on error, returns -1. - */ -int config_add_session_name(const char *path, const char *name) -{ - int ret; - const char *attr = "session="; - /* Max name len accepted plus attribute's len and the NULL byte. */ - char session_name[NAME_MAX + strlen(attr) + 1]; - - /* - * With GNU C < 2.1, snprintf returns -1 if the target buffer is too small; - * With GNU C >= 2.1, snprintf returns the required size (excluding closing null) - */ - ret = snprintf(session_name, sizeof(session_name), "%s%s\n", attr, name); - if (ret < 0) { - ret = -1; - goto error; - } - ret = write_config(path, ret, session_name); -error: - return ret; -} - -/* - * Init configuration directory and file. - * On success, returns 0; - * on error, returns -1. - */ -int config_init(const char *session_name) -{ - int ret; - const char *path; - - path = utils_get_home_dir(); - if (path == NULL) { - ret = -1; - goto error; - } - - /* Create default config file */ - ret = create_config_file(path); - if (ret < 0) { - goto error; - } - - ret = config_add_session_name(path, session_name); - if (ret < 0) { - goto error; - } - - DBG("Init config session in %s", path); - -error: - return ret; -}