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| -rw-r--r-- | .gitignore | 24 | ||||
| -rw-r--r-- | COPYING | 674 | ||||
| -rw-r--r-- | Makefile.am | 6 | ||||
| -rw-r--r-- | README | 42 | ||||
| -rwxr-xr-x | autogen.sh | 8 | ||||
| -rw-r--r-- | configure.ac | 40 | ||||
| -rw-r--r-- | example.sql | 1 | ||||
| -rw-r--r-- | example.xml | 12 | ||||
| -rw-r--r-- | src/Makefile.am | 14 | ||||
| -rw-r--r-- | src/db-manager.c | 698 |
10 files changed, 1519 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..fc56372 --- /dev/null +++ b/.gitignore @@ -0,0 +1,24 @@ +*~ +DEADJOE +core.* +db-manager +*.o +*.gz +Makefile +Makefile.in +aclocal.m4 +autom4te.cache/ +compile +config.h +config.h.in +config.log +config.status +configure +depcomp +install-sh +missing +src/.deps/ +src/Makefile +src/Makefile.in +stamp-h1 +test-db
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If not, see <http://www.gnu.org/licenses/>. + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + <program> Copyright (C) <year> <name of author> + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +<http://www.gnu.org/licenses/>. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +<http://www.gnu.org/philosophy/why-not-lgpl.html>. diff --git a/Makefile.am b/Makefile.am new file mode 100644 index 0000000..2273f4a --- /dev/null +++ b/Makefile.am @@ -0,0 +1,6 @@ +SUBDIRS = \ + src + +EXTRA_DIST = \ + COPYING \ + README @@ -0,0 +1,42 @@ + README for db-manager + + +db-manager is a tool for creating, updating and removing databases by the +package manager through a distributions packaging mechanism (currently +tested on RPM packages). + +Currently supports creation of the following database types: + sqlite + +To build and run, use the standard autotools workflow like: + ./configure + make + sudo make install + + +=========================================================================== + + +The tool takes an xml file of the following format: + +<database> + <dbtype>sqlite3</dbtype> + <name>.libaccounts-svc</name> + <path>/opt/dbspace</path> + <options> + <uid>5000</uid> + <gid>5000</gid> + <permissions>600</permissions> + <smacklabel>libaccounts-svc</smacklabel> + <queryfile>/fullpath/to/db-command-file</queryfile> + </options> +</database> + +And it will create, update or remove the database depending on the +options given to the tool. + +Note that the queryfile should be a file containing sql (or whatever +your database uses) commands to create or modify the database as intended. + +The example.xml and example.sql files are intended to work as is (aside +from the example.sql file needs to be copied to /tmp/example.sql). diff --git a/autogen.sh b/autogen.sh new file mode 100755 index 0000000..5018e80 --- /dev/null +++ b/autogen.sh @@ -0,0 +1,8 @@ +#!/bin/bash + +autoreconf --install + +args="--prefix=/usr" + +echo ./configure $args $@ +./configure $args $@ diff --git a/configure.ac b/configure.ac new file mode 100644 index 0000000..28e5158 --- /dev/null +++ b/configure.ac @@ -0,0 +1,40 @@ +AC_PREREQ([2.68]) +AC_INIT([db-manager],[0.0.1],[william.douglas@intel.com]) +AM_INIT_AUTOMAKE([foreign -Wall -Werror]) +AC_CONFIG_FILES([Makefile src/Makefile]) +AC_CONFIG_SRCDIR([src/db-manager.c]) +AC_CONFIG_HEADERS([config.h]) + +# Checks for programs. +AC_PROG_CC +AM_PROG_CC_C_O +AC_PROG_INSTALL + +# PkgConfig tests +PKG_CHECK_MODULES([libxml2], [libxml-2.0]) +PKG_CHECK_MODULES([sqlite3], [sqlite3]) + +# Checks for header files. +AC_CHECK_HEADERS([stdio.h assert.h sys/types.h sys/stat.h dirent.h signal.h errno.h sched.h fcntl.h stdlib.h string.h sys/time.h syslog.h unistd.h asm/unistd.h attr/xattr.h], , [AC_MSG_ERROR([UNABLE TO FIND HEADER])]) + +# Checks for typedefs, structures, and compiler characteristics. +AC_TYPE_SIZE_T +AC_TYPE_SSIZE_T + +# Checks for library functions. +AC_FUNC_MALLOC + +AC_OUTPUT + +AC_MSG_RESULT([ + db-manager $VERSION + ======== + + prefix: ${prefix} + exec_prefix: ${exec_prefix} + bindir: ${bindir} + + compiler: ${CC} + cflags: ${CFLAGS} + ldflags: ${LDFLAGS} +]) diff --git a/example.sql b/example.sql new file mode 100644 index 0000000..98ac982 --- /dev/null +++ b/example.sql @@ -0,0 +1 @@ +create table t1 (t1key INTEGER PRIMARY KEY, data TEXT); diff --git a/example.xml b/example.xml new file mode 100644 index 0000000..e2106e9 --- /dev/null +++ b/example.xml @@ -0,0 +1,12 @@ +<database> + <dbtype>sqlite3</dbtype> + <name>test-db</name> + <path>/tmp/path</path> + <options> + <uid>0</uid> + <gid>0</gid> + <permissions>666</permissions> + <label>test-db-label</label> + <queryfile>/tmp/example.sql</queryfile> + </options> +</database> diff --git a/src/Makefile.am b/src/Makefile.am new file mode 100644 index 0000000..0f52f9d --- /dev/null +++ b/src/Makefile.am @@ -0,0 +1,14 @@ +AM_CFLAGS = -std=gnu99 -fstack-protector -D_FORTIFY_SOURCE=2 \ + -Wall -pedantic -W -Wstrict-prototypes -Wundef -fno-common \ + -Werror-implicit-function-declaration \ + -Wdeclaration-after-statement -Wformat \ + -Wformat-security -Werror=format-security + +bin_PROGRAMS = \ + db-manager + +db_manager_SOURCES = \ + db-manager.c + +AM_CPPFLAGS = $(AM_CFLAGS) $(libxml2_CFLAGS) $(sqlite3_CFLAGS) +db_manager_LDADD = $(libxml2_LIBS) $(sqlite3_LIBS) -lattr diff --git a/src/db-manager.c b/src/db-manager.c new file mode 100644 index 0000000..4cb7497 --- /dev/null +++ b/src/db-manager.c @@ -0,0 +1,698 @@ +#define _GNU_SOURCE +/* + * Copyright 2013, Intel Corporation + * + * This file is part of db-manager + * + * This program file 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; version 3 of the License. + * + * 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 in a file named COPYING; if not, write to the + * Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, + * Boston, MA 02110-1301 USA + * + * Authors: + * William Douglas <william.douglas@intel.com> + */ + +#include <stdio.h> +#include <getopt.h> +#include <stdlib.h> +#include <string.h> +#include <errno.h> +#include <unistd.h> +#include <fcntl.h> +#include <limits.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <libxml/xmlreader.h> +#include <attr/xattr.h> +#include <sqlite3.h> + +//#define log(format, ...) fprintf(stderr, format, __VA_ARGS__) +#define log(format, ...) + +/* + * Structure to hold node values from the db xml file. + */ +static struct db { + char *filename; + char *type; + char *path; + char *smack_label; + char *cmd_filename; + unsigned long uid; + unsigned long gid; + unsigned long perm; +} db_conf = { 0, 0, 0, 0, 0, 0, 0, 0644 }; + +/* + * Enum for the action to be performed by the db manager. + */ +static enum action { + CREATE, + DELETE, + UPDATE +} action_arg; + +/* + * Print commandline options for db-manager. + * + * Take a char * as the program's name. + */ +static void usage(const char *name) +{ + fprintf(stderr, "Usage: %s [OPTION]\n", name); + fprintf(stderr, " -c, --create=db-xml Create the db using the db-xml file\n"); + fprintf(stderr, " -d, --delete=db-xml Delete the db using the db-xml file\n"); + fprintf(stderr, " -u, --upgrade=db-xml Update the db using the db-xml file\n"); + fprintf(stderr, " -h, --help Display this help message\n"); +} + +/* + * Check if the a given name is valid and if so associate + * the value with the global db struct. If the value + * already exists (xml parsing should throw an error but + * if it does not) free the previous value and add the + * new one to the struct. + * + * Takes two char *'s as a name and value (neither can + * be NULL as checked in the calling function). + */ +static void add_value_to_db(char *name, char *value) +{ + log("entered %s\n", __func__); + + if (strncmp(name, "dbtype", 6) == 0) { + if (db_conf.type) + free(db_conf.type); + db_conf.type = strdup(value); + if (!db_conf.type) + exit(EXIT_FAILURE); + } else if (strncmp(name, "name", 4) == 0) { + if (db_conf.filename) + free(db_conf.filename); + db_conf.filename = strdup(value); + if (!db_conf.filename) + exit(EXIT_FAILURE); + } else if (strncmp(name, "path", 4) == 0) { + if (db_conf.path) + free(db_conf.path); + db_conf.path = strdup(value); + if (!db_conf.path) + exit(EXIT_FAILURE); + if (db_conf.path[0] != '/') { + fprintf(stderr, "path is not absolute\n"); + exit(EXIT_FAILURE); + } + } else if (strncmp(name, "smacklabel", 5) == 0) { + if (db_conf.smack_label) + free(db_conf.smack_label); + db_conf.smack_label = strdup(value); + if (!db_conf.smack_label) + exit(EXIT_FAILURE); + } else if (strncmp(name, "queryfile", 9) == 0) { + if (db_conf.cmd_filename) + free(db_conf.cmd_filename); + db_conf.cmd_filename = strdup(value); + if (!db_conf.cmd_filename) + exit(EXIT_FAILURE); + if (db_conf.cmd_filename[0] != '/') { + fprintf(stderr, + "queryfile's filename not absolute\n"); + exit(EXIT_FAILURE); + } + } else if (strncmp(name, "uid", 3) == 0) { + errno = 0; + db_conf.uid = strtoul(value, NULL, 10); + if (errno) + exit(EXIT_FAILURE); + } else if (strncmp(name, "gid", 3) == 0) { + errno = 0; + db_conf.gid = strtoul(value, NULL, 10); + if (errno) + exit(EXIT_FAILURE); + } else if (strncmp(name, "permissions", 11) == 0) { + errno = 0; + db_conf.perm = strtoul(value, NULL, 8); + if (errno) + exit(EXIT_FAILURE); + } +} + +/* + * Read a value from an xml node and add that value + * to the database if it is not NULL. + * + * Takes a valid xmlTextReaderPtr after calling the + * xmlTextReaderRead function. + */ +static void process_node(xmlTextReaderPtr reader) +{ + xmlChar *name = NULL, *value = NULL; + int r; + + log("entered %s\n", __func__); + + name = xmlTextReaderName(reader); + if (!name) + exit(EXIT_FAILURE); + + log("%d %d %s %d ", + xmlTextReaderDepth(reader), + xmlTextReaderNodeType(reader), + name, + xmlTextReaderIsEmptyElement(reader)); + + if ((strncmp((char *)name, "database", 8) == 0) || + (strncmp((char *)name, "options", 7) == 0)) { + goto out; + } + + r = xmlTextReaderRead(reader); + if (r != 1) + goto out; + value = xmlTextReaderValue(reader); + if (!value) + goto out; + + log("%s\n", value); + + add_value_to_db((char *)name, (char *)value); + +out: + log("%s", "\n"); + xmlFree(name); + xmlFree(value); + return; +} + +/* + * Delete a db file. + * + * Takes a char * as a absolute path to the db file. + * Return an int, -1 for failure, 0 for success. + */ +static int delete_db(char *fullpath) +{ + log("entered %s\n", __func__); + + return unlink(fullpath); +} + +/* + * Change file permissions and ownership information + * as well as applying a smack label if specified. + * + * Takes a char * as an absolute path to the file. + */ +static void mod_db_file(char *fullpath) +{ + int r; + + log("entered %s\n", __func__); + + r = chmod(fullpath, (mode_t)db_conf.perm); + if (r) + perror("chmod: "); + r = chown(fullpath, (uid_t)db_conf.uid, (gid_t)db_conf.gid); + if (r) + perror("chown: "); + + if (db_conf.smack_label) { + r = setxattr(fullpath, "security.SMACK64", db_conf.smack_label, strlen(db_conf.smack_label), 0); + if (r) + perror("setxattr: "); + } +} + +/* + * Get db command from file specified in the xml + * configuration. + * + * Take a char ** to store the db command in. + * Return an int, -1 for failure, 0 for success. + */ +static int get_db_cmd(char **db_cmd) +{ + FILE *cmd_file = NULL; + long flen; + int r = 0; + + log("entered %s\n", __func__); + + cmd_file = fopen(db_conf.cmd_filename, "r"); + if (!cmd_file) { + perror("query file error: "); + fprintf(stderr, "couldn't open query file: %s\n", + db_conf.cmd_filename); + goto get_db_cmd_out; + } + + r = fseek(cmd_file, 0L, SEEK_END); + if (r == -1) { + perror("query file error: "); + goto get_db_cmd_out; + } + + flen = ftell(cmd_file); + rewind(cmd_file); + + *db_cmd = calloc(flen + 1, 1); + if (!(*db_cmd)) { + r = -1; + goto get_db_cmd_out; + } + + r = fread(*db_cmd, 1, flen, cmd_file); + if (ferror(cmd_file)) { + r = -1; + free(*db_cmd); + fprintf(stderr, "query file read error\n"); + goto get_db_cmd_out; + } + + log("db command: %s\n", *db_cmd); + r = 0; + +get_db_cmd_out: + if (cmd_file) + (void)fclose(cmd_file); + + return r; +} + +/* + * Create sqlite3 db, called via create_db function + * pointer. + * + * Takes a char * as an absolute path to the file. + * Return an int, -1 failure, 0 success. + */ +static int sqlite3_create_db(char *fullpath) +{ + char *db_cmd = NULL, *err_msg = NULL; + sqlite3 *db_handle = NULL; + int r = 0; + + log("entered %s\n", __func__); + + r = sqlite3_open(fullpath, &db_handle); + if (r != SQLITE_OK) { + r = -1; + db_handle = NULL; + fprintf(stderr, "error opening db file\n"); + goto sqlite3_out; + } + + if (db_conf.cmd_filename) { + r = get_db_cmd(&db_cmd); + + if (!r) { + r = sqlite3_exec(db_handle, db_cmd, NULL, NULL, &err_msg); + if (r) { + fprintf(stderr, "error in sql execution: %s\n", err_msg); + sqlite3_free(err_msg); + goto sqlite3_out; + } + } else { + db_cmd = NULL; + } + } + +sqlite3_out: + free(db_cmd); + (void)sqlite3_close(db_handle); + return r; +} + +/* + * Check if a file exists. + * + * Takes a char * as an absolute path to the file + * Return an int with values signifying the following: + * -1 - other open error + * 0 - does not exist + * 1 - does exist + */ +static int test_file_exists(char *fullpath) +{ + int r; + int f; + + log("entered %s\n", __func__); + + f = open(fullpath, O_CREAT | O_EXCL, O_RDONLY); + if (f == -1 && errno == EEXIST) + r = 1; + else if (f == -1) { + r = -1; + perror("error opening db file: "); + } else { + close(f); + (void)unlink(fullpath); + r = 0; + } + + return r; +} + +/* + * Create journal filename for sqlite3 and test if the + * file exists, if it does call mod_db_file to do the + * permissions update, called via mod_journal_db + * function pointer. + * + * Takes a char * as an absolute path to the file. + */ +static void sqlite3_mod_journal_db(char *fullpath) +{ + int r; + char *journal_fullpath; + + log("entered %s\n", __func__); + + r = asprintf(&journal_fullpath, "%s%s", fullpath, "-journal"); + if (r == -1) + return; + + r = test_file_exists(journal_fullpath); + if (r == 1) + mod_db_file(journal_fullpath); + + free(journal_fullpath); +} + +/* + * Pointer to create_db function for appropriate db type. + */ +static int (*create_db)(char *fullpath); + +/* + * Pointer to mod_journal_db function for appropriate db type. + */ +static void (*mod_journal_db)(char *fullpath); + +/* + * Pointer to update_db function for appropriate db type. + */ +static int (*update_db)(char *fullpath); + +/* + * Test if a directory exists. + * + * Takes a char * as an absolute path to the file. + * Return an int with values signifying the following: + * -1 - error or part of the path is a file not a directory + * 0 - directory exists (not file) + * 1 - directory does not exist + */ +static int test_dir_exist(char *dir) +{ + struct stat st; + int r; + + log("entered %s\n", __func__); + + r = stat(dir, &st); + + if (r == -1 && errno == ENOENT) + return 1; + + if (r != -1) { + if (st.st_mode & S_IFDIR) + return 0; + else + fprintf(stderr, + "Expected directory and got a file: %s\n", + dir); + } + + return -1; +} + +/* + * Emulate mkdir -p. + * + * Return an int, -1 for failure, 0 for success. + */ +static int make_path_to_db(void) +{ + char *dirfullpath; + char partialpath[PATH_MAX]; + size_t psize; + char *d; + int r = 0; + + log("entered %s\n", __func__); + + memset(partialpath, 0, PATH_MAX); + dirfullpath = strdup(db_conf.path); + if (!dirfullpath) + return -1; + + if (strlen(dirfullpath) >= PATH_MAX) { + fprintf(stderr, "path too long: %s\n", dirfullpath); + free(dirfullpath); + return -1; + } + partialpath[0] = '/'; + psize = 1; + + d = strtok(dirfullpath, "/"); + while (d) { + memcpy(partialpath+psize, d, strlen(d)); + psize += strlen(d); + partialpath[psize] = '/'; + psize++; + r = test_dir_exist(partialpath); + if (r == -1) + break; + if (r == 1) { + r = mkdir(partialpath, S_IRWXU | S_IRGRP | + S_IXGRP | S_IROTH | S_IXOTH); + if (r) { + perror("mkdir error: "); + break; + } + } + d = strtok(NULL, "/"); + } + + free(dirfullpath); + + return r; +} + +/* + * Create db and set its permissions. + * + * Takes a char * as an absolute path to the file. + * Return an int, -1 for failure, 0 for success. + */ +static int create(char *fullpath) +{ + int r; + + log("entered %s\n", __func__); + + r = make_path_to_db(); + if (r) + return r; + + r = test_file_exists(fullpath); + if (!r) { + if (create_db) + r = (*create_db)(fullpath); + else + r = -1; + } + + if (r != -1) { + mod_db_file(fullpath); + if (mod_journal_db) + (*mod_journal_db)(fullpath); + } + + return r; +} + +/* + * Update sqlite3 db, called via update_db + * function pointer. + * + * Takes a char * as an absolute path to the file. + * Return an int, -1 for failure, 0 for success. + */ +static int sqlite3_update_db(char *fullpath) +{ + log("entered %s\n", __func__); + + /* for now update and create have the same process */ + if (create_db) + return (*create_db)(fullpath); + return -1; +} + +/* + * update db and (re)set its permissions. + * + * Takes a char * as an absolute path to the file. + * Return an int, -1 for failure, 0 for success. + */ +static int update(char *fullpath) +{ + int r; + + log("entered %s\n", __func__); + + r = test_file_exists(fullpath); + if (r == 1) { + if (update_db) + r = (*update_db)(fullpath); + else + r = -1; + } + + if (r != -1) { + mod_db_file(fullpath); + if (mod_journal_db) + (*mod_journal_db)(fullpath); + } + + return r; +} + +/* + * Read an xml file with a format like: + * <database> + * <dbtype>sqlite3</dbtype> + * <name>test-db</name> + * <path>/tmp/long/path</path> + * <options> + * <uid>0</uid> + * <gid>0</gid> + * <permissions>666</permissions> + * <smacklabel>test-db-label</smacklabel> + * <queryfile>/tmp/example.sql</queryfile> + * </options> + * </database> + * + * Takes a char * as an absolute path to the file. + */ +static void process_xml(char *filename) +{ + xmlTextReaderPtr reader; + int r; + + log("entered %s\n", __func__); + + r = test_file_exists(filename); + if (r == 1) + reader = xmlNewTextReaderFilename(filename); + else + exit(EXIT_FAILURE); + + if (!reader) + exit(EXIT_FAILURE); + + r = xmlTextReaderRead(reader); + while (r == 1) { + if ((xmlTextReaderNodeType(reader) != 15) && + (xmlTextReaderNodeType(reader) != 14)) + process_node(reader); + + r = xmlTextReaderRead(reader); + } + if (!db_conf.type || + !db_conf.filename || + !db_conf.path) + exit(EXIT_FAILURE); + + xmlFreeTextReader(reader); +} + +/* + * Run the function is specified on the commandline. + * + * Return an int, -1 for failure, 0 for success. + */ +static int run(void) +{ + char *fullpath; + int r; + + log("entered %s\n", __func__); + + r = asprintf(&fullpath, "%s/%s", db_conf.path, db_conf.filename); + if (r == -1) + exit(EXIT_FAILURE); + + if (strncmp(db_conf.type, "sqlite3", 7) == 0) { + create_db = &sqlite3_create_db; + mod_journal_db = &sqlite3_mod_journal_db; + update_db = &sqlite3_update_db; + } else { + exit(EXIT_FAILURE); + } + + if (action_arg == DELETE) + r = delete_db(fullpath); + else if (action_arg == CREATE) + r = create(fullpath); + else + r = update(fullpath); + + free(fullpath); + + return r; +} + +int main(int argc, char **argv) +{ + int c; + int option_index = 0; + struct option long_options[] = { + { "create", required_argument, NULL, 'c' }, + { "update", required_argument, NULL, 'u' }, + { "delete", required_argument, NULL, 'd' }, + { "help", no_argument, NULL, 'h' }, + { 0, 0, 0, 0 } + }; + + c = getopt_long(argc, argv, "c:u:d:h",long_options, &option_index); + if (c == -1) { + usage(argv[0]); + exit(EXIT_FAILURE); + } + + switch (c) { + case 'c': + action_arg = CREATE; + break; + case 'd': + action_arg = DELETE; + break; + case 'u': + action_arg = UPDATE; + break; + case 'h': + usage(argv[0]); + exit(EXIT_SUCCESS); + default: + usage(argv[0]); + exit(EXIT_FAILURE); + } + + process_xml(optarg); + + return run(); +} |