#include <babeltrace/values.h>
#include <popt.h>
#include <glib.h>
+#include <sys/types.h>
+#include <pwd.h>
#include "babeltrace-cfg.h"
+#define SYSTEM_PLUGIN_PATH INSTALL_LIBDIR "/babeltrace/plugins"
#define DEFAULT_SOURCE_COMPONENT_NAME "ctf.fs"
+#define HOME_ENV_VAR "HOME"
+#define HOME_SUBPATH "/.babeltrace/plugins"
/*
* Error printf() macro which prepends "Error: " the first time it's
LEGACY_OUTPUT_FORMAT_DUMMY,
};
+static bool omit_system_plugin_path;
+static bool omit_home_plugin_path;
+
/*
* Prints the "out of memory" error.
*/
fprintf(fp, " --begin Start time: [YYYY-MM-DD [hh:mm:]]ss[.nnnnnnnnn]\n");
fprintf(fp, " --end End time: [YYYY-MM-DD [hh:mm:]]ss[.nnnnnnnnn]\n");
fprintf(fp, " --timerange Time range: begin,end or [begin,end] (where [] are actual brackets)\n");
+ fprintf(fp, " --omit-system-plugin-path Omit system plugins from plugin search path\n");
+ fprintf(fp, " --omit-home-plugin-path Omit home plugins from plugin search path\n");
fprintf(fp, " -h --help Show this help\n");
fprintf(fp, " --help-legacy Show Babeltrace 1.x legacy options\n");
fprintf(fp, " -v, --verbose Enable verbose output\n");
return;
}
+static
+bool is_setuid_setgid(void)
+{
+ return (geteuid() != getuid() || getegid() != getgid());
+}
+
/*
* Extracts the various paths from the string arg, delimited by ':',
* and converts them to an array value object.
* Return value is owned by the caller.
*/
static
-struct bt_value *plugin_paths_from_arg(const char *arg)
+enum bt_value_status plugin_paths_from_arg(struct bt_value *plugin_paths,
+ const char *arg)
{
- struct bt_value *plugin_paths;
const char *at = arg;
const char *end = arg + strlen(arg);
- plugin_paths = bt_value_array_create();
- if (!plugin_paths) {
- print_err_oom();
- goto error;
- }
-
while (at < end) {
int ret;
GString *path;
}
}
- goto end;
-
+ return BT_VALUE_STATUS_OK;
error:
- BT_PUT(plugin_paths);
-
-end:
- return plugin_paths;
+ return BT_VALUE_STATUS_ERROR;
}
/*
OPT_TIMERANGE,
OPT_VERBOSE,
OPT_VERSION,
+ OPT_OMIT_SYSTEM_PLUGIN_PATH,
+ OPT_OMIT_HOME_PLUGIN_PATH,
};
/* popt long option descriptions */
{ "timerange", '\0', POPT_ARG_STRING, NULL, OPT_TIMERANGE, NULL, NULL },
{ "verbose", 'v', POPT_ARG_NONE, NULL, OPT_VERBOSE, NULL, NULL },
{ "version", 'V', POPT_ARG_NONE, NULL, OPT_VERSION, NULL, NULL },
+ { "omit-system-plugin-path", '\0', POPT_ARG_NONE, NULL, OPT_OMIT_SYSTEM_PLUGIN_PATH, NULL, NULL },
+ { "omit-home-plugin-path", '\0', POPT_ARG_NONE, NULL, OPT_OMIT_HOME_PLUGIN_PATH, NULL, NULL },
{ NULL, 0, 0, NULL, 0, NULL, NULL },
};
return -1;
}
+static char *bt_secure_getenv(const char *name)
+{
+ if (is_setuid_setgid()) {
+ printf_err("Disregarding %s environment variable for setuid/setgid binary", name);
+ return NULL;
+ }
+ return getenv(name);
+}
+
+static const char *get_home_dir(void)
+{
+ char *val = NULL;
+ struct passwd *pwd;
+
+ val = bt_secure_getenv(HOME_ENV_VAR);
+ if (val) {
+ goto end;
+ }
+ /* Fallback on password file. */
+ pwd = getpwuid(getuid());
+ if (!pwd) {
+ goto end;
+ }
+ val = pwd->pw_dir;
+end:
+ return val;
+}
+
+static int add_internal_plugin_paths(struct bt_config *cfg)
+{
+ if (!omit_home_plugin_path) {
+ char path[PATH_MAX];
+ const char *home_dir;
+
+ if (is_setuid_setgid()) {
+ printf_debug("Skipping non-system plugin paths for setuid/setgid binary.");
+ } else {
+ home_dir = get_home_dir();
+ if (home_dir) {
+ if (strlen(home_dir) + strlen(HOME_SUBPATH) + 1
+ >= PATH_MAX) {
+ printf_err("Home directory path too long\n");
+ goto error;
+ }
+ strcpy(path, home_dir);
+ strcat(path, HOME_SUBPATH);
+ if (plugin_paths_from_arg(cfg->plugin_paths, path)) {
+ printf_err("Invalid home plugin path\n");
+ goto error;
+ }
+ }
+ }
+ }
+
+ if (!omit_system_plugin_path) {
+ if (plugin_paths_from_arg(cfg->plugin_paths,
+ SYSTEM_PLUGIN_PATH)) {
+ printf_err("Invalid system plugin path\n");
+ goto error;
+ }
+ }
+ return 0;
+error:
+ return -1;
+}
+
/*
* Returns a Babeltrace configuration, out of command-line arguments,
* containing everything that is needed to instanciate specific
DEFAULT_SOURCE_COMPONENT_NAME);
}
+ cfg->plugin_paths = bt_value_array_create();
+ if (!cfg->plugin_paths) {
+ print_err_oom();
+ goto error;
+ }
+
/* Parse options */
pc = poptGetContext(NULL, argc, (const char **) argv, long_options, 0);
if (!pc) {
switch (opt) {
case OPT_PLUGIN_PATH:
- if (cfg->plugin_paths) {
- printf_err("Duplicate --plugin-path option\n");
- goto error;
- }
-
- cfg->plugin_paths = plugin_paths_from_arg(arg);
- if (!cfg->plugin_paths) {
- printf_err("Invalid --plugin-path option's argument\n");
- goto error;
+ if (is_setuid_setgid()) {
+ printf_debug("Skipping non-system plugin paths for setuid/setgid binary.");
+ } else {
+ if (plugin_paths_from_arg(cfg->plugin_paths, arg)) {
+ printf_err("Invalid --plugin-path option's argument\n");
+ goto error;
+ }
}
break;
+ case OPT_OMIT_SYSTEM_PLUGIN_PATH:
+ omit_system_plugin_path = true;
+ break;
+ case OPT_OMIT_HOME_PLUGIN_PATH:
+ omit_home_plugin_path = true;
+ break;
case OPT_OUTPUT_PATH:
if (text_legacy_opts.output->len > 0) {
printf_err("Duplicate --output option\n");
arg = NULL;
}
+ if (add_internal_plugin_paths(cfg)) {
+ goto error;
+ }
+
/* Append current component configuration, if any */
if (cur_cfg_comp && !cur_is_implicit_source) {
add_cfg_comp(cfg, cur_cfg_comp, cur_cfg_comp_dest);
projects / babeltrace.git / blobdiff