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...;'EOF' + case "$1" in + get_size) echo 1M ;; + pread) dd if=/dev/zero count=$3 iflag=count_bytes ;; + *) exit 2 ;; + esac + EOF + =head1 WRITING AN NBDKIT SH PLUGIN For an example plugin written in Bash, see: diff --git a/plugins/sh/sh.c b/plugins/sh/sh.c index 368f1eb..fcd839b 100644 --- a/plugins/sh/sh.c +++ b/plugins/sh/sh.c @@ -39,6 +39,7 @@ #include <string.h> #include <unistd.h> #include <errno.h> +#include <sys/stat.h> #include <nbdkit-plugin.h> @@ -115,6 +116,50 @@ sh_dump_plugin (void) } } +/* This implements t...

v1 was here: https://www.redhat.com/archives/libguestfs/2018-December/thread.html#00123 v2: - Document "-" instead of "script=-" and use it in the test; and verify this also works on FreeBSD; and verify that it doesn't depend on the particular behaviour of our wrapper script and should work with installed nbdkit too. - Fix handling of zero flags parameter. -

Some feature additions to the shell script plugin allow us to test the export flags field reasonably easily. Rich.