10:17 a.m.
This is an extended version of:
https://www.redhat.com/archives/libguestfs/2019-September/msg00288.html
Apparently I forgot it on my tree, so I'm posting that series again,
adding an extra cleanup more due to the v2v/common splits.
Pino Toscano (6):
tests: switch away from xgetcwd
daemon: move read_whole_file to common utils
daemon: switch from read_file to read_whole_file
daemon: remove unused include
build: remove unused gnulib modules
build: ignore unused submodules
Makefile.am | 4 ---
bootstrap | 17 ---------
configure.ac | 2 --
daemon/9p.c | 58 +-----------------------------
daemon/Makefile.am | 4 ---
daemon/cpio.c | 2 --
daemon/daemon.h | 1 +
daemon/ntfsclone.c | 4 +--
daemon/tar.c | 4 +--
daemon/utils.c | 58 ++++++++++++++++++++++++++++++
lib/Makefile.am | 5 ---
m4/.gitignore | 52 ---------------------------
tests/c-api/test-add-libvirt-dom.c | 10 +++---
13 files changed, 66 insertions(+), 155 deletions(-)
--
2.21.0
10:17 a.m.
New subject: [PATCH v3 1/6] tests: switch away from xgetcwd
xgetcwd is used only in a test, so there is no need to pull a gnulib
module just for it.
Switch to use getcwd directly with a fixed buffer: the tests would have
failed with paths longer than 992 characters, as the libvirt_uri would
have been truncated. Since there were no reports of issues, we can
assume that the current working directory will fit in 1024 characters;
adapt the size of libvirt_uri accordingly.
---
tests/c-api/test-add-libvirt-dom.c | 10 ++++------
1 file changed, 4 insertions(+), 6 deletions(-)
diff --git a/tests/c-api/test-add-libvirt-dom.c b/tests/c-api/test-add-libvirt-dom.c
index 10224d102..7c7c1bd26 100644
--- a/tests/c-api/test-add-libvirt-dom.c
+++ b/tests/c-api/test-add-libvirt-dom.c
@@ -28,8 +28,6 @@
#include <libvirt/libvirt.h>
#include <libvirt/virterror.h>
-#include "xgetcwd.h"
-
#include "guestfs.h"
#include "guestfs-utils.h"
@@ -76,11 +74,12 @@ main (int argc, char *argv[])
virErrorPtr err;
int r;
char *backend;
- char *cwd;
+ char cwd[1024];
FILE *fp;
- char libvirt_uri[1024];
+ char libvirt_uri[sizeof cwd + 64];
- cwd = xgetcwd ();
+ if (getcwd (cwd, sizeof cwd) == NULL)
+ error (EXIT_FAILURE, errno, "getcwd");
/* Create the guestfs handle. */
g = guestfs_create ();
@@ -147,7 +146,6 @@ main (int argc, char *argv[])
virDomainFree (dom);
virConnectClose (conn);
- free (cwd);
unlink ("test-add-libvirt-dom.xml");
unlink ("test-add-libvirt-dom-1.img");
--
2.21.0
10:17 a.m.
New subject: [PATCH v3 2/6] daemon: move read_whole_file to common utils
Move the read_whole_file function to the common utilities of the daemon,
so other parts can use it. For this purpose, add an out parameter to
get the amount of bytes read.
Except from the parameter addition, this should be just refactoring.
---
daemon/9p.c | 58 +------------------------------------------------
daemon/daemon.h | 1 +
daemon/utils.c | 58 +++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 60 insertions(+), 57 deletions(-)
diff --git a/daemon/9p.c b/daemon/9p.c
index 55644249d..ce73e2ba0 100644
--- a/daemon/9p.c
+++ b/daemon/9p.c
@@ -34,8 +34,6 @@
#define BUS_PATH "/sys/bus/virtio/drivers/9pnet_virtio"
-static char *read_whole_file (const char *filename);
-
/* https://bugzilla.redhat.com/show_bug.cgi?id=714981#c1 */
char **
do_list_9p (void)
@@ -82,7 +80,7 @@ do_list_9p (void)
* the mount tag length to be unlimited (or up to 65536 bytes).
* See: linux/include/linux/virtio_9p.h
*/
- CLEANUP_FREE char *mount_tag = read_whole_file (mount_tag_path);
+ CLEANUP_FREE char *mount_tag = read_whole_file (mount_tag_path, NULL);
if (mount_tag == 0)
continue;
@@ -117,60 +115,6 @@ do_list_9p (void)
return take_stringsbuf (&r);
}
-/* Read whole file into dynamically allocated array. If there is an
- * error, DON'T call reply_with_perror, just return NULL. Returns a
- * \0-terminated string.
- */
-static char *
-read_whole_file (const char *filename)
-{
- char *r = NULL;
- size_t alloc = 0, size = 0;
- int fd;
-
- fd = open (filename, O_RDONLY|O_CLOEXEC);
- if (fd == -1) {
- perror (filename);
- return NULL;
- }
-
- while (1) {
- alloc += 256;
- char *r2 = realloc (r, alloc);
- if (r2 == NULL) {
- perror ("realloc");
- free (r);
- close (fd);
- return NULL;
- }
- r = r2;
-
- /* The '- 1' in the size calculation ensures there is space below
- * to add \0 to the end of the input.
- */
- ssize_t n = read (fd, r + size, alloc - size - 1);
- if (n == -1) {
- fprintf (stderr, "read: %s: %m\n", filename);
- free (r);
- close (fd);
- return NULL;
- }
- if (n == 0)
- break;
- size += n;
- }
-
- if (close (fd) == -1) {
- fprintf (stderr, "close: %s: %m\n", filename);
- free (r);
- return NULL;
- }
-
- r[size] = '\0';
-
- return r;
-}
-
/* Takes optional arguments, consult optargs_bitmask. */
int
do_mount_9p (const char *mount_tag, const char *mountpoint, const char *options)
diff --git a/daemon/daemon.h b/daemon/daemon.h
index 66bfdc49e..170fb2537 100644
--- a/daemon/daemon.h
+++ b/daemon/daemon.h
@@ -84,6 +84,7 @@ extern int random_name (char *template);
extern char *get_random_uuid (void);
extern char *make_exclude_from_file (const char *function, char *const *excludes);
extern int asprintf_nowarn (char **strp, const char *fmt, ...);
+extern char *read_whole_file (const char *filename, size_t *size_r);
/* mountable functions (in utils.c) */
extern char *mountable_to_string (const mountable_t *mountable);
diff --git a/daemon/utils.c b/daemon/utils.c
index c3f88bcab..118965225 100644
--- a/daemon/utils.c
+++ b/daemon/utils.c
@@ -827,3 +827,61 @@ cleanup_free_mountable (mountable_t *mountable)
free (mountable->volume);
}
}
+
+/**
+ * Read whole file into dynamically allocated array. If there is an
+ * error, DON'T call reply_with_perror, just return NULL. Returns a
+ * C<\0>-terminated string. C<size_r> can be specified to get the
+ * size of the returned data.
+ */
+char *
+read_whole_file (const char *filename, size_t *size_r)
+{
+ char *r = NULL;
+ size_t alloc = 0, size = 0;
+ int fd;
+
+ fd = open (filename, O_RDONLY|O_CLOEXEC);
+ if (fd == -1) {
+ perror (filename);
+ return NULL;
+ }
+
+ while (1) {
+ alloc += 256;
+ char *r2 = realloc (r, alloc);
+ if (r2 == NULL) {
+ perror ("realloc");
+ free (r);
+ close (fd);
+ return NULL;
+ }
+ r = r2;
+
+ /* The '- 1' in the size calculation ensures there is space below
+ * to add \0 to the end of the input.
+ */
+ ssize_t n = read (fd, r + size, alloc - size - 1);
+ if (n == -1) {
+ fprintf (stderr, "read: %s: %m\n", filename);
+ free (r);
+ close (fd);
+ return NULL;
+ }
+ if (n == 0)
+ break;
+ size += n;
+ }
+
+ if (close (fd) == -1) {
+ fprintf (stderr, "close: %s: %m\n", filename);
+ free (r);
+ return NULL;
+ }
+
+ r[size] = '\0';
+ if (size_r != NULL)
+ *size_r = size;
+
+ return r;
+}
--
2.21.0
10:17 a.m.
New subject: [PATCH v3 3/6] daemon: switch from read_file to read_whole_file
Since we have already an helper to read a file, use it instead of the
gnulib function.
---
daemon/ntfsclone.c | 4 +---
daemon/tar.c | 4 +---
2 files changed, 2 insertions(+), 6 deletions(-)
diff --git a/daemon/ntfsclone.c b/daemon/ntfsclone.c
index 2e481eb94..3c0d10fc5 100644
--- a/daemon/ntfsclone.c
+++ b/daemon/ntfsclone.c
@@ -26,8 +26,6 @@
#include <errno.h>
#include <error.h>
-#include "read-file.h"
-
#include "daemon.h"
#include "actions.h"
#include "optgroups.h"
@@ -39,7 +37,7 @@ read_error_file (char *error_file)
size_t len;
char *str;
- str = read_file (error_file, &len);
+ str = read_whole_file (error_file, &len);
if (str == NULL) {
str = strdup ("(no error)");
if (str == NULL)
diff --git a/daemon/tar.c b/daemon/tar.c
index 300e99448..daad75a47 100644
--- a/daemon/tar.c
+++ b/daemon/tar.c
@@ -28,8 +28,6 @@
#include <sys/types.h>
#include <sys/stat.h>
-#include "read-file.h"
-
#include "guestfs_protocol.h"
#include "daemon.h"
#include "actions.h"
@@ -107,7 +105,7 @@ read_error_file (char *error_file)
size_t len;
char *str;
- str = read_file (error_file, &len);
+ str = read_whole_file (error_file, &len);
if (str == NULL) {
str = strdup ("(no error)");
if (str == NULL)
--
2.21.0
10:17 a.m.
New subject: [PATCH v3 4/6] daemon: remove unused include
---
daemon/cpio.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/daemon/cpio.c b/daemon/cpio.c
index 09491ac9c..c8456af2a 100644
--- a/daemon/cpio.c
+++ b/daemon/cpio.c
@@ -26,8 +26,6 @@
#include <sys/types.h>
#include <sys/stat.h>
-#include "read-file.h"
-
#include "guestfs_protocol.h"
#include "daemon.h"
#include "actions.h"
--
2.21.0
10:17 a.m.
New subject: [PATCH v3 5/6] build: remove unused gnulib modules
Remove gnulib modules that provide stuff clearly not used within
libguestfs (library, daemon, and C tools). Among directly and
indirectly modules used previous (and now no more), they are:
cycle-check
d-ino
dev-ino
dup3
dup3-tests
fcntl-safer
fcntl-safer-tests
fdopendir
fdopendir-tests
filevercmp
filevercmp-tests
ftell
ftell-tests
ftello
ftello-tests
fts
getaddrinfo
getaddrinfo-tests
getcwd
getcwd-tests
gnu-make
hostent
i-ring
i-ring-tests
iconv
iconv-tests
inet_ntop
inet_ntop-tests
isatty
isatty-tests
openat-safer
openat-safer-tests
opendirat
ptsname_r
ptsname_r-tests
read-file
read-file-tests
rewinddir
servent
ttyname_r
ttyname_r-tests
xgetcwd
Some of the removed modules are still used pulled indirectly as
dependency of other modules. There should be no behaviour change on
recent Linux distros, although older distros were not tested (adding
a module back is easy, anyway).
Remove accordingly unused automake variables, and ignored files.
---
bootstrap | 17 ---------------
daemon/Makefile.am | 4 ----
lib/Makefile.am | 5 -----
m4/.gitignore | 52 ----------------------------------------------
4 files changed, 78 deletions(-)
diff --git a/bootstrap b/bootstrap
index aaf038d98..9e5a8b72d 100755
--- a/bootstrap
+++ b/bootstrap
@@ -104,34 +104,26 @@ gnulib_tool=$GNULIB_SRCDIR/gnulib-tool
modules='
accept4
-areadlink
areadlinkat
-arpa_inet
base64
byteswap
c-ctype
cloexec
closeout
connect
-dup3
error
-filevercmp
fstatat
-fts
full-read
full-write
futimens
-getaddrinfo
getline
getprogname
gitlog-to-changelog
glob
-gnu-make
gnumakefile
hash
hash-pjw
human
-iconv
ignore-value
intprops
lock
@@ -141,24 +133,18 @@ memmem
mkdtemp
mkstemps
netdb
-netinet_in
nonblocking
-openat
perror
pipe2
pread
-ptsname_r
-read-file
readlink
select
setenv
sleep
socket
-stat-time
strchrnul
strerror
strndup
-symlinkat
sys_select
sys_types
sys_wait
@@ -166,9 +152,6 @@ tls
vasprintf
vc-list-files
warnings
-xalloc
-xalloc-die
-xgetcwd
xstrtol
xstrtoll
xvasprintf
diff --git a/daemon/Makefile.am b/daemon/Makefile.am
index 49dbf1998..7c71920c4 100644
--- a/daemon/Makefile.am
+++ b/daemon/Makefile.am
@@ -225,13 +225,9 @@ guestfsd_LDADD = \
$(HIVEX_LIBS) \
$(SD_JOURNAL_LIBS) \
$(top_builddir)/gnulib/lib/.libs/libgnu.a \
- $(GETADDRINFO_LIB) \
- $(HOSTENT_LIB) \
- $(INET_NTOP_LIB) \
$(LIBSOCKET) \
$(LIB_CLOCK_GETTIME) \
$(LIBINTL) \
- $(SERVENT_LIB) \
$(PCRE_LIBS) \
$(TSK_LIBS) \
$(RPC_LIBS) \
diff --git a/lib/Makefile.am b/lib/Makefile.am
index 95b5edb4e..e5df96fe2 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -154,15 +154,10 @@ libguestfs_la_LIBADD = \
$(SELINUX_LIBS) \
$(JANSSON_LIBS) \
../gnulib/lib/libgnu.la \
- $(GETADDRINFO_LIB) \
- $(HOSTENT_LIB) \
- $(INET_NTOP_LIB) \
$(LIBSOCKET) \
$(LIB_CLOCK_GETTIME) \
$(LTLIBINTL) \
$(LTLIBTHREAD) \
- $(LTLIBICONV) \
- $(SERVENT_LIB) \
$(RPC_LIBS)
# Force libtool to name the library 'libguestfs.so.0.$(MAX_PROC_NR).0'.
diff --git a/m4/.gitignore b/m4/.gitignore
index 16ae9c415..c41044f84 100644
--- a/m4/.gitignore
+++ b/m4/.gitignore
@@ -2,51 +2,38 @@
/absolute-header.m4
/accept4.m4
/alloca.m4
-/argmatch.m4
/arpa_inet_h.m4
/asm-underscore.m4
/base64.m4
/btowc.m4
/builtin-expect.m4
/byteswap.m4
-/canonicalize-lgpl.m4
/chdir-long.m4
-/chown.m4
/clock_time.m4
-/cloexec.m4
/closedir.m4
/close.m4
/codeset.m4
/ctype.m4
-/cycle-check.m4
-/d-ino.m4
/dirent_h.m4
/dirfd.m4
/dirname.m4
-/dos.m4
/double-slash-root.m4
/d-type.m4
/dup2.m4
-/dup3.m4
/dup.m4
/eealloc.m4
/environ.m4
/errno_h.m4
/error.m4
-/exitfail.m4
/exponentd.m4
/extensions.m4
/extern-inline.m4
/fatal-signal.m4
/fchdir.m4
-/fclose.m4
/fcntl_h.m4
/fcntl.m4
/fcntl-o.m4
-/fcntl-safer.m4
-/fdopendir.m4
/fdopen.m4
-/fflush.m4
/filenamecat.m4
/flexmember.m4
/float_h.m4
@@ -54,23 +41,13 @@
/fnmatch.m4
/fpending.m4
/fpieee.m4
-/fpurge.m4
-/freading.m4
-/fseeko.m4
/fstatat.m4
/fstat.m4
-/ftell.m4
-/ftello.m4
/ftruncate.m4
-/fts.m4
/futimens.m4
-/getaddrinfo.m4
-/getcwd-abort-bug.m4
/getcwd.m4
-/getcwd-path-max.m4
/getdelim.m4
/getdtablesize.m4
-/getgroups.m4
/getline.m4
/getlogin.m4
/getlogin_r.m4
@@ -79,20 +56,14 @@
/getprogname.m4
/gettime.m4
/gettimeofday.m4
-/getugroups.m4
/glob_h.m4
/glob.m4
/gnulib-common.m4
/gnulib-comp.m4
/gnulib-tool.m4
-/gnu-make.m4
-/hash.m4
/host-cpu-c-abi.m4
-/hostent.m4
/human.m4
-/iconv.m4
/include_next.m4
-/inet_ntop.m4
/inet_pton.m4
/__inline.m4
/intlmacosx.m4
@@ -103,13 +74,9 @@
/inttypes.m4
/inttypes-pri.m4
/ioctl.m4
-/i-ring.m4
-/isatty.m4
/isblank.m4
-/isc-posix.m4
/langinfo_h.m4
/largefile.m4
-/lchown.m4
/lcmessage.m4
/lib-ld.m4
/lib-link.m4
@@ -125,7 +92,6 @@
/locale-zh.m4
/localtime-buffer.m4
/lock.m4
-/longdouble.m4
/longlong.m4
/lseek.m4
/lstat.m4
@@ -143,7 +109,6 @@
/memmem.m4
/mempcpy.m4
/memrchr.m4
-/mgetgroups.m4
/minmax.m4
/mkdir.m4
/mkdtemp.m4
@@ -175,26 +140,22 @@
/pthread_rwlock_rdlock.m4
/pthread_sigmask.m4
/pthread-thread.m4
-/ptsname_r.m4
/putenv.m4
/quotearg.m4
/quote.m4
/raise.m4
/rawmemchr.m4
/readdir.m4
-/read-file.m4
/readlinkat.m4
/readlink.m4
/read.m4
/realloc.m4
-/rewinddir.m4
/rmdir.m4
/safe-read.m4
/safe-write.m4
/save-cwd.m4
/sched_h.m4
/select.m4
-/servent.m4
/setenv.m4
/setlocale.m4
/sh-filename.m4
@@ -202,7 +163,6 @@
/sig_atomic_t.m4
/signalblocking.m4
/signal_h.m4
-/signed.m4
/size_max.m4
/sleep.m4
/snprintf.m4
@@ -230,11 +190,8 @@
/string_h.m4
/strndup.m4
/strnlen.m4
-/strtoimax.m4
/strtoll.m4
-/strtol.m4
/strtoull.m4
-/strtoul.m4
/strtoumax.m4
/symlinkat.m4
/symlink.m4
@@ -252,16 +209,12 @@
/time_h.m4
/timespec.m4
/tls.m4
-/ttyname_r.m4
-/ulonglong.m4
-/ungetc.m4
/unistd_h.m4
/unistd-safer.m4
/unlinkat.m4
/unlinkdir.m4
/unlink.m4
/usleep.m4
-/utimbuf.m4
/utimecmp.m4
/utime_h.m4
/utime.m4
@@ -276,20 +229,15 @@
/warnings.m4
/warn-on-use.m4
/wchar_h.m4
-/wchar.m4
/wchar_t.m4
/wcrtomb.m4
/wctob.m4
/wctomb.m4
/wctype_h.m4
-/wctype.m4
/wint_t.m4
/write.m4
/xalloc.m4
-/xgetcwd.m4
/xsize.m4
-/xstrndup.m4
-/xstrtol.m4
/xstrtol.m4
/xvasprintf.m4
/yield.m4
--
2.21.0
10:17 a.m.
New subject: [PATCH v3 6/6] build: ignore unused submodules
Do not build the mlv2v, and mllibvirt submodules, as they are not used.
---
Makefile.am | 4 ----
configure.ac | 2 --
2 files changed, 6 deletions(-)
diff --git a/Makefile.am b/Makefile.am
index 28f542765..b1e88a42b 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -164,10 +164,6 @@ SUBDIRS += common/mlvisit
SUBDIRS += common/mlxml
SUBDIRS += common/mltools
SUBDIRS += common/mlcustomize
-SUBDIRS += common/mlv2v
-if HAVE_LIBVIRT
-SUBDIRS += common/mllibvirt
-endif
SUBDIRS += customize
SUBDIRS += builder builder/templates
SUBDIRS += get-kernel
diff --git a/configure.ac b/configure.ac
index 7ec2c9b46..4d043dd02 100644
--- a/configure.ac
+++ b/configure.ac
@@ -235,14 +235,12 @@ AC_CONFIG_FILES([Makefile
common/mlaugeas/Makefile
common/mlcustomize/Makefile
common/mlgettext/Makefile
- common/mllibvirt/Makefile
common/mlpcre/Makefile
common/mlprogress/Makefile
common/mlstdutils/Makefile
common/mlstdutils/guestfs_config.ml
common/mltools/Makefile
common/mlutils/Makefile
- common/mlv2v/Makefile
common/mlvisit/Makefile
common/mlxml/Makefile
common/options/Makefile
--
2.21.0
1:06 p.m.
New subject: [PATCH v3 6/6] build: ignore unused submodules
On Wed, Nov 27, 2019 at 05:17:31PM +0100, Pino Toscano wrote:
Do not build the mlv2v, and mllibvirt submodules, as they are not
used.
---
Makefile.am | 4 ----
configure.ac | 2 --
2 files changed, 6 deletions(-)
diff --git a/Makefile.am b/Makefile.am
index 28f542765..b1e88a42b 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -164,10 +164,6 @@ SUBDIRS += common/mlvisit
SUBDIRS += common/mlxml
SUBDIRS += common/mltools
SUBDIRS += common/mlcustomize
-SUBDIRS += common/mlv2v
-if HAVE_LIBVIRT
-SUBDIRS += common/mllibvirt
-endif
SUBDIRS += customize
SUBDIRS += builder builder/templates
SUBDIRS += get-kernel
diff --git a/configure.ac b/configure.ac
index 7ec2c9b46..4d043dd02 100644
--- a/configure.ac
+++ b/configure.ac
@@ -235,14 +235,12 @@ AC_CONFIG_FILES([Makefile
common/mlaugeas/Makefile
common/mlcustomize/Makefile
common/mlgettext/Makefile
- common/mllibvirt/Makefile
common/mlpcre/Makefile
common/mlprogress/Makefile
common/mlstdutils/Makefile
common/mlstdutils/guestfs_config.ml
common/mltools/Makefile
common/mlutils/Makefile
- common/mlv2v/Makefile
common/mlvisit/Makefile
common/mlxml/Makefile
common/options/Makefile
ACK series
Rich.
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
virt-top is 'top' for virtual machines. Tiny program with many
powerful monitoring features, net stats, disk stats, logging, etc.
http://people.redhat.com/~rjones/virt-top
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