If you use data_file_url(), you must first call init_progfile_dir().

And if you call init_progfile_dir(), you must call
init_process_policies() before that.

And even if you *don't* use data_file_url(), you might use it in the
future, or you might use other calls to get data file paths, so make
*all* the extcap programs make those calls.

(Yes, this is important on macOS, for example; it may also be important
on Windows.  On other UN*Xes we may just compile in the data file path,
but that's not true on *all* our platforms.)

Change-Id: I99265ed69ec24096884ec067feddd7d7f3855436
Reviewed-on: https://code.wireshark.org/review/32775
Reviewed-by: Guy Harris <guy@alum.mit.edu>

extcap/androiddump.c

@@ -20,6 +20,7 @@
 #include <time.h>
 #include <wsutil/strtoi.h>
 #include <wsutil/filesystem.h>
+#include <wsutil/privileges.h>
 #include <ui/cmdarg_err.h>
 #include <wsutil/inet_addr.h>
 
@@ -2481,6 +2482,7 @@ static int capture_android_tcpdump(char *interface, char *fifo,
 }
 
 int main(int argc, char *argv[]) {
+    char            *init_progfile_dir_error;
     int              ret = EXIT_CODE_GENERIC;
     int              option_idx = 0;
     int              result;
@@ -2511,6 +2513,22 @@ int main(int argc, char *argv[]) {
 
     cmdarg_err_init(failure_warning_message, failure_warning_message);
 
+    /*
+     * Get credential information for later use.
+     */
+    init_process_policies();
+
+    /*
+     * Attempt to get the pathname of the directory containing the
+     * executable file.
+     */
+    init_progfile_dir_error = init_progfile_dir(argv[0]);
+    if (init_progfile_dir_error != NULL) {
+        g_warning("Can't get pathname of directory containing the captype program: %s.",
+                  init_progfile_dir_error);
+        g_free(init_progfile_dir_error);
+    }
+
     extcap_conf = g_new0(extcap_parameters, 1);
 
     help_url = data_file_url("androiddump.html");

extcap/ciscodump.c

@@ -16,6 +16,7 @@
 #include <wsutil/interface.h>
 #include <wsutil/strtoi.h>
 #include <wsutil/filesystem.h>
+#include <wsutil/privileges.h>
 #include <extcap/ssh-base.h>
 #include <writecap/pcapio.h>
 
@@ -517,6 +518,7 @@ static int list_config(char *interface, unsigned int remote_port)
 
 int main(int argc, char *argv[])
 {
+	char* init_progfile_dir_error;
 	int result;
 	int option_idx = 0;
 	ssh_params_t* ssh_params = ssh_params_new();
@@ -532,6 +534,22 @@ int main(int argc, char *argv[])
 	WSADATA wsaData;
 #endif  /* _WIN32 */
 
+	/*
+	 * Get credential information for later use.
+	 */
+	init_process_policies();
+
+	/*
+	 * Attempt to get the pathname of the directory containing the
+	 * executable file.
+	 */
+	init_progfile_dir_error = init_progfile_dir(argv[0]);
+	if (init_progfile_dir_error != NULL) {
+		g_warning("Can't get pathname of directory containing the captype program: %s.",
+			init_progfile_dir_error);
+		g_free(init_progfile_dir_error);
+	}
+
 	help_url = data_file_url("ciscodump.html");
 	extcap_base_set_util_info(extcap_conf, argv[0], CISCODUMP_VERSION_MAJOR, CISCODUMP_VERSION_MINOR,
 		CISCODUMP_VERSION_RELEASE, help_url);

extcap/dpauxmon.c

@@ -17,6 +17,7 @@
 #include <wsutil/strtoi.h>
 #include <wsutil/filesystem.h>
 #include <wsutil/netlink.h>
+#include <wsutil/privileges.h>
 #include <writecap/pcapio.h>
 
 #include <netlink/netlink.h>
@@ -478,6 +479,7 @@ close_out:
 
 int main(int argc, char *argv[])
 {
+	char* init_progfile_dir_error;
 	int option_idx = 0;
 	int result;
 	unsigned int interface_id = 0;
@@ -485,6 +487,22 @@ int main(int argc, char *argv[])
 	extcap_parameters* extcap_conf = g_new0(extcap_parameters, 1);
 	char* help_header = NULL;
 
+	/*
+	 * Get credential information for later use.
+	 */
+	init_process_policies();
+
+	/*
+	 * Attempt to get the pathname of the directory containing the
+	 * executable file.
+	 */
+	init_progfile_dir_error = init_progfile_dir(argv[0]);
+	if (init_progfile_dir_error != NULL) {
+		g_warning("Can't get pathname of directory containing the captype program: %s.",
+			init_progfile_dir_error);
+		g_free(init_progfile_dir_error);
+	}
+
 	extcap_base_set_util_info(extcap_conf, argv[0], DPAUXMON_VERSION_MAJOR, DPAUXMON_VERSION_MINOR, DPAUXMON_VERSION_RELEASE,
 		NULL);
 	extcap_base_register_interface(extcap_conf, DPAUXMON_EXTCAP_INTERFACE, "DisplayPort AUX channel monitor capture", 275, "DisplayPort AUX channel monitor");

extcap/randpktdump.c

@@ -17,6 +17,7 @@
 #include "randpkt_core/randpkt_core.h"
 #include <wsutil/strtoi.h>
 #include <wsutil/filesystem.h>
+#include <wsutil/privileges.h>
 
 #include <cli_main.h>
 
@@ -123,6 +124,7 @@ static int list_config(char *interface)
 
 int main(int argc, char *argv[])
 {
+	char* init_progfile_dir_error;
 	int option_idx = 0;
 	int result;
 	guint16 maxbytes = 5000;
@@ -144,6 +146,22 @@ int main(int argc, char *argv[])
 	char* help_url;
 	char* help_header = NULL;
 
+	/*
+	 * Get credential information for later use.
+	 */
+	init_process_policies();
+
+	/*
+	 * Attempt to get the pathname of the directory containing the
+	 * executable file.
+	 */
+	init_progfile_dir_error = init_progfile_dir(argv[0]);
+	if (init_progfile_dir_error != NULL) {
+		g_warning("Can't get pathname of directory containing the captype program: %s.",
+			init_progfile_dir_error);
+		g_free(init_progfile_dir_error);
+	}
+
 	help_url = data_file_url("randpktdump.html");
 	extcap_base_set_util_info(extcap_conf, argv[0], RANDPKTDUMP_VERSION_MAJOR, RANDPKTDUMP_VERSION_MINOR,
 		RANDPKTDUMP_VERSION_RELEASE, help_url);

extcap/sdjournal.c

@@ -23,6 +23,7 @@
 #include <wsutil/interface.h>
 #include <wsutil/file_util.h>
 #include <wsutil/filesystem.h>
+#include <wsutil/privileges.h>
 #include <writecap/pcapio.h>
 #include <wiretap/wtap.h>
 
@@ -328,6 +329,7 @@ static int list_config(char *interface)
 
 int main(int argc, char **argv)
 {
+	char* init_progfile_dir_error;
 	int result;
 	int option_idx = 0;
 	int start_from_entries = 10;
@@ -337,6 +339,22 @@ int main(int argc, char **argv)
 	char* help_url;
 	char* help_header = NULL;
 
+	/*
+	 * Get credential information for later use.
+	 */
+	init_process_policies();
+
+	/*
+	 * Attempt to get the pathname of the directory containing the
+	 * executable file.
+	 */
+	init_progfile_dir_error = init_progfile_dir(argv[0]);
+	if (init_progfile_dir_error != NULL) {
+		g_warning("Can't get pathname of directory containing the captype program: %s.",
+			init_progfile_dir_error);
+		g_free(init_progfile_dir_error);
+	}
+
 	help_url = data_file_url("sdjournal.html");
 	extcap_base_set_util_info(extcap_conf, argv[0], SDJOURNAL_VERSION_MAJOR, SDJOURNAL_VERSION_MINOR,
 			SDJOURNAL_VERSION_RELEASE, help_url);

extcap/sshdump.c

@@ -18,6 +18,7 @@
 #include <wsutil/file_util.h>
 #include <wsutil/strtoi.h>
 #include <wsutil/filesystem.h>
+#include <wsutil/privileges.h>
 
 #include <errno.h>
 #include <string.h>
@@ -336,6 +337,7 @@ static char* concat_filters(const char* extcap_filter, const char* remote_filter
 
 int main(int argc, char *argv[])
 {
+	char* init_progfile_dir_error;
 	int result;
 	int option_idx = 0;
 	ssh_params_t* ssh_params = ssh_params_new();
@@ -354,6 +356,22 @@ int main(int argc, char *argv[])
 	WSADATA wsaData;
 #endif  /* _WIN32 */
 
+	/*
+	 * Get credential information for later use.
+	 */
+	init_process_policies();
+
+	/*
+	 * Attempt to get the pathname of the directory containing the
+	 * executable file.
+	 */
+	init_progfile_dir_error = init_progfile_dir(argv[0]);
+	if (init_progfile_dir_error != NULL) {
+		g_warning("Can't get pathname of directory containing the captype program: %s.",
+			init_progfile_dir_error);
+		g_free(init_progfile_dir_error);
+	}
+
 	help_url = data_file_url("sshdump.html");
 	extcap_base_set_util_info(extcap_conf, argv[0], SSHDUMP_VERSION_MAJOR, SSHDUMP_VERSION_MINOR,
 		SSHDUMP_VERSION_RELEASE, help_url);

extcap/udpdump.c

@@ -47,6 +47,7 @@
 #include <wsutil/strtoi.h>
 #include <wsutil/inet_addr.h>
 #include <wsutil/filesystem.h>
+#include <wsutil/privileges.h>
 
 #include <cli_main.h>
 
@@ -358,6 +359,7 @@ static void run_listener(const char* fifo, const guint16 port, const char* proto
 
 int main(int argc, char *argv[])
 {
+	char* init_progfile_dir_error;
 	int option_idx = 0;
 	int result;
 	guint16 port = 0;
@@ -371,6 +373,22 @@ int main(int argc, char *argv[])
 	WSADATA wsaData;
 #endif  /* _WIN32 */
 
+	/*
+	 * Get credential information for later use.
+	 */
+	init_process_policies();
+
+	/*
+	 * Attempt to get the pathname of the directory containing the
+	 * executable file.
+	 */
+	init_progfile_dir_error = init_progfile_dir(argv[0]);
+	if (init_progfile_dir_error != NULL) {
+		g_warning("Can't get pathname of directory containing the captype program: %s.",
+			init_progfile_dir_error);
+		g_free(init_progfile_dir_error);
+	}
+
 	help_url = data_file_url("udpdump.html");
 	extcap_base_set_util_info(extcap_conf, argv[0], UDPDUMP_VERSION_MAJOR, UDPDUMP_VERSION_MINOR, UDPDUMP_VERSION_RELEASE,
 		help_url);