[process] Improve error message for inaccessible process (#4354)

[mono.git] / mono / metadata / w32process-unix-osx.c

diff --git a/mono/metadata/w32process-unix-osx.c b/mono/metadata/w32process-unix-osx.c
index eb3d5b70b082e8f447a0dfe252f98d5b06665c86..d6696cab584277ab946a3ba8f37f837807c431e5 100644 (file)
--- a/mono/metadata/w32process-unix-osx.c
+++ b/mono/metadata/w32process-unix-osx.c
@@ -54,10 +54,15 @@ mono_w32process_get_name (pid_t pid)
        g_free (pi);
 #else
        gchar buf[256];
+       gint res;
 
        /* No proc name on OSX < 10.5 nor ppc nor iOS */
        memset (buf, '\0', sizeof(buf));
-       proc_name (pid, buf, sizeof(buf));
+       res = proc_name (pid, buf, sizeof(buf));
+       if (res == 0) {
+               mono_trace (G_LOG_LEVEL_DEBUG, MONO_TRACE_IO_LAYER, "%s: proc_name failed, error (%d) \"%s\"", __func__, errno, g_strerror (errno));
+               return NULL;
+       }
 
        // Fixes proc_name triming values to 15 characters #32539
        if (strlen (buf) >= MAXCOMLEN - 1) {