[Libguestfs] [nbdkit PATCH v2 0/3] more consistent stdin/out handling

In v2: - use int instead of bool in the public header - split the tests from the code - don't overload test-layers; instead, add new tests - add a missing fflush exposed by the new tests - other minor cleanups Eric Blake (3): server: Add nbdkit_stdio_safe server: Sanitize stdin/out before running plugin code server: More tests of stdin/out handling docs/nbdkit-plugin.pod | 23 ++++- plugins/sh/nbdkit-sh-plugin.pod | 4 +- include/nbdkit-common.h | 1 + tests/Makefile.am | 23 +++++ server/internal.h | 2 + server/background.c | 14 +-- server/captive.c | 10 +- server/connections.c | 12 --- server/main.c | 38 ++++++- server/nbdkit.syms | 1 + server/public.c | 18 +++- server/test-public.c | 23 ++++- plugins/sh/sh.c | 7 +- tests/test-single-sh.sh | 78 +++++++++++++++ tests/test-stdio.sh | 95 ++++++++++++++++++ tests/test-stdio-plugin.c | 170 ++++++++++++++++++++++++++++++++ 16 files changed, 489 insertions(+), 30 deletions(-) create mode 100755 tests/test-single-sh.sh create mode 100755 tests/test-stdio.sh create mode 100644 tests/test-stdio-plugin.c -- 2.26.0