Use `const char *` instead of `char *` for line parameter for process callbacks.

This patch changes the type definition of the process callbacks to use
`const char *` instead of `char *`.

See: https://bugs.torproject.org/28179

2 files changed, 8 insertions, 4 deletions

diff --git a/src/feature/client/transports.c b/src/feature/client/transports.c
index df7991846c..0f456ba1e6 100644
--- a/src/feature/client/transports.c
+++ b/src/feature/client/transports.c
@@ -1711,7 +1711,9 @@ tor_escape_str_for_pt_args(const char *string, const char *chars_to_escape)
  * stdout. Our process can be found in <b>process</b>, the data can be found in
  * <b>line</b> and the length of our line is given in <b>size</b>. */
 STATIC void
-managed_proxy_stdout_callback(process_t *process, char *line, size_t size)
+managed_proxy_stdout_callback(process_t *process,
+                              const char *line,
+                              size_t size)
 {
   tor_assert(process);
   tor_assert(line);
@@ -1732,7 +1734,9 @@ managed_proxy_stdout_callback(process_t *process, char *line, size_t size)
  * stderr. Our process can be found in <b>process</b>, the data can be found in
  * <b>line</b> and the length of our line is given in <b>size</b>. */
 STATIC void
-managed_proxy_stderr_callback(process_t *process, char *line, size_t size)
+managed_proxy_stderr_callback(process_t *process,
+                              const char *line,
+                              size_t size)
 {
   tor_assert(process);
   tor_assert(line);
diff --git a/src/feature/client/transports.h b/src/feature/client/transports.h
index 88735a7211..a3994a0099 100644
--- a/src/feature/client/transports.h
+++ b/src/feature/client/transports.h
@@ -143,8 +143,8 @@ STATIC char* get_pt_proxy_uri(void);
 
 STATIC void free_execve_args(char **arg);
 
-STATIC void managed_proxy_stdout_callback(process_t *, char *, size_t);
-STATIC void managed_proxy_stderr_callback(process_t *, char *, size_t);
+STATIC void managed_proxy_stdout_callback(process_t *, const char *, size_t);
+STATIC void managed_proxy_stderr_callback(process_t *, const char *, size_t);
 STATIC bool managed_proxy_exit_callback(process_t *, process_exit_code_t);
 
 #endif /* defined(PT_PRIVATE) */