afb-hook & afb-trace: Fix usage of readlink

[src/app-framework-binder.git] / src / afb-trace.c

diff --git a/src/afb-trace.c b/src/afb-trace.c
index dd6e863..e7ae9fc 100644 (file)
--- a/src/afb-trace.c
+++ b/src/afb-trace.c
@@ -687,10 +687,12 @@ static void hook_api_rootdir_get_fd(void *closure, const struct afb_hookid *hook
 {
        char path[PATH_MAX], proc[100];
        const char *key, *val;
+       ssize_t s;
 
        if (result >= 0) {
                snprintf(proc, sizeof proc, "/proc/self/fd/%d", result);
-               readlink(proc, path, sizeof path);
+               s = readlink(proc, path, sizeof path);
+               path[s < 0 ? 0 : s >= sizeof path ? sizeof path - 1 : s] = 0;
                key = "path";
                val = path;
        } else {
@@ -705,10 +707,12 @@ static void hook_api_rootdir_open_locale(void *closure, const struct afb_hookid
 {
        char path[PATH_MAX], proc[100];
        const char *key, *val;
+       ssize_t s;
 
        if (result >= 0) {
                snprintf(proc, sizeof proc, "/proc/self/fd/%d", result);
-               readlink(proc, path, sizeof path);
+               s = readlink(proc, path, sizeof path);
+               path[s < 0 ? 0 : s >= sizeof path ? sizeof path - 1 : s] = 0;
                key = "path";
                val = path;
        } else {