Do a fstatvfs() call to figure out if the filesystem used for the cache

is large enough for the cache. People like to build VM images with way
too small filesystems and so warning about this situation should help.
With deraadt@ and job@

1 files changed, 30 insertions, 2 deletions

diff --git a/usr.sbin/rpki-client/main.c b/usr.sbin/rpki-client/main.c
index 41c04695a58..b5adfa586b9 100644
--- a/usr.sbin/rpki-client/main.c
+++ b/usr.sbin/rpki-client/main.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: main.c,v 1.142 2021/06/03 15:10:05 claudio Exp $ */
+/*	$OpenBSD: main.c,v 1.143 2021/06/14 09:54:15 claudio Exp $ */
 /*
  * Copyright (c) 2019 Kristaps Dzonsons <kristaps@bsd.lv>
  *
@@ -15,11 +15,12 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
+#include <sys/types.h>
 #include <sys/queue.h>
 #include <sys/socket.h>
 #include <sys/resource.h>
+#include <sys/statvfs.h>
 #include <sys/tree.h>
-#include <sys/types.h>
 #include <sys/wait.h>
 
 #include <assert.h>
@@ -579,6 +580,31 @@ tal_load_default(const char *tals[], size_t max)
 	return s;
 }
 
+static void
+check_fs_size(int fd, const char *cachedir)
+{
+	struct statvfs	fs;
+	const long long minsize = 500 * 1024 * 1024;
+	const long long minnode = 300 * 1000;
+
+	if (fstatvfs(fd, &fs) == -1)
+		err(1, "statfs %s", cachedir);
+
+	if (fs.f_bavail < minsize / fs.f_frsize || fs.f_favail < minnode) {
+		fprintf(stderr, "WARNING: rpki-client may need more than "
+		    "the availabe disk space\n"
+		    "on the file-system holding %s.\n", cachedir);
+		fprintf(stderr, "available space: %lldkB, "
+		    "suggested minimum %lldkB\n",
+		    (long long)fs.f_bavail * fs.f_frsize / 1024,
+		    minsize / 1024);
+		fprintf(stderr, "available inodes %lld, "
+		    "suggested minimum %lld\n\n",
+		    (long long)fs.f_favail, minnode);
+		fflush(stderr);
+	}
+}
+
 void
 suicide(int sig __attribute__((unused)))
 {
@@ -706,6 +732,8 @@ main(int argc, char *argv[])
 	if ((outdirfd = open(outputdir, O_RDONLY | O_DIRECTORY, 0)) == -1)
 		err(1, "output directory %s", outputdir);
 
+	check_fs_size(cachefd, cachedir);
+
 	if (outformats == 0)
 		outformats = FORMAT_OPENBGPD;