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@

diff --git a/usr.sbin/rpki-client/main.c b/usr.sbin/rpki-client/main.c
index 41c0469..b5adfa5 100644 (file)
--- 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;