common: use /proc only on Linux

Non-Linux systems do not have /proc, so do not attempt to open it and
eliminate an unnecessary access() syscall on those systems.

diff --git a/common/compat.c b/common/compat.c
index f0e31eb0653baed4f70b80032cbb0d7e0f91da7f..5a9702d5c64a1eee78fe52c344cd6b6da82263bc 100644 (file)
--- a/common/compat.c
+++ b/common/compat.c
@@ -912,6 +912,7 @@ fdwalk (int (* cb) (void *data, int fd),
        struct rlimit rl;
 #endif
 
+#ifdef __linux__
        dir = opendir ("/proc/self/fd");
        if (dir != NULL) {
                while ((de = readdir (dir)) != NULL) {
@@ -934,6 +935,7 @@ fdwalk (int (* cb) (void *data, int fd),
                closedir (dir);
                return res;
        }
+#endif
 
        /* No /proc, brute force */
 #ifdef HAVE_SYS_RESOURCE_H