diff options
| -rw-r--r-- | libsandbox/libsandbox.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/libsandbox/libsandbox.c b/libsandbox/libsandbox.c index 6a7368c..9705db1 100644 --- a/libsandbox/libsandbox.c +++ b/libsandbox/libsandbox.c @@ -349,14 +349,14 @@ char *egetcwd(char *buf, size_t size) /* If tracing a child, our cwd may not be the same as the child's */ if (trace_pid) { - char proc[20]; - sprintf(proc, "/proc/%i/cwd", trace_pid); - ssize_t ret = readlink(proc, buf, size); - if (ret == -1) { + char proc[22]; + snprintf(proc, sizeof(proc), "/proc/%i/cwd", trace_pid); + ssize_t link_len = readlink(proc, buf, size - 1); + if (link_len == -1) { errno = ESRCH; return NULL; } - buf[ret] = '\0'; + buf[link_len] = '\0'; return buf; } |