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browser-system: Use execv() directly instead of os_exec()

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This allows the URL to be passed as a single argument to the program
instead of getting split into multiple by os_exec(). This makes the
operation more robust for cases where the URL could have been received
from an external source and could potentially add extra arguments to the
command line.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
This commit is contained in:
Jouni Malinen 2014-10-21 12:59:47 +03:00 committed by Jouni Malinen
parent 4181c3964d
commit 22444bb246
1 changed files with 19 additions and 12 deletions
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31
src/utils/browser-system.c
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@ -64,22 +64,15 @@ static void http_req(void *ctx, struct http_request *req)
int hs20_web_browser(const char *url) int hs20_web_browser(const char *url)
{ {
char cmd[2000];
int ret;
struct http_server *http; struct http_server *http;
struct in_addr addr; struct in_addr addr;
struct browser_data data; struct browser_data data;
pid_t pid;
wpa_printf(MSG_INFO, "Launching Android browser to %s", url); wpa_printf(MSG_INFO, "Launching system browser to %s", url);
os_memset(&data, 0, sizeof(data)); os_memset(&data, 0, sizeof(data));
ret = os_snprintf(cmd, sizeof(cmd), "x-www-browser '%s' &", url);
if (ret < 0 || (size_t) ret >= sizeof(cmd)) {
wpa_printf(MSG_ERROR, "Too long URL");
return -1;
}
if (eloop_init() < 0) { if (eloop_init() < 0) {
wpa_printf(MSG_ERROR, "eloop_init failed"); wpa_printf(MSG_ERROR, "eloop_init failed");
return -1; return -1;
@ -92,14 +85,28 @@ int hs20_web_browser(const char *url)
return -1; return -1;
} }
if (os_exec("/usr/bin/x-www-browser", url, 0) != 0) { pid = fork();
wpa_printf(MSG_INFO, "Failed to launch browser"); if (pid < 0) {
eloop_cancel_timeout(browser_timeout, NULL, NULL); perror("fork");
http_server_deinit(http); http_server_deinit(http);
eloop_destroy(); eloop_destroy();
return -1; return -1;
} }
if (pid == 0) {
/* run the external command in the child process */
char *argv[3];
argv[0] = "browser-system";
argv[1] = (void *) url;
argv[2] = NULL;
execv("/usr/bin/x-www-browser", argv);
perror("execv");
exit(0);
return -1;
}
eloop_register_timeout(120, 0, browser_timeout, &data, NULL); eloop_register_timeout(120, 0, browser_timeout, &data, NULL);
eloop_run(); eloop_run();
eloop_cancel_timeout(browser_timeout, &data, NULL); eloop_cancel_timeout(browser_timeout, &data, NULL);