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man/man-db-2.5.1-zio.dif

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--- config.h.in
+++ config.h.in 2007-12-07 15:50:23.000000000 +0100
@@ -454,6 +454,9 @@
/* Define to 1 if you have the `z' library (-lz). */
#undef HAVE_LIBZ
+/* Define to 1 if you have libzio for opening compressed manuals */
+#undef HAVE_ZIO
+
/* Define to 1 if you have the <limits.h> header file. */
#undef HAVE_LIMITS_H
--- configure.ac
+++ configure.ac 2008-04-21 13:18:38.854059561 +0200
@@ -94,7 +94,18 @@ AC_ARG_WITH(sections,
sections="$withval"
fi],
[: ${sections=1 n l 8 3 2 5 4 9 6 7}])
-
+AC_ARG_WITH(zio,
+[AS_HELP_STRING([--with-zio=LIBRARY], [use zlib/libbz2 wrapper library LIBRARY (libzio)])],
+ [if test -z "$withval" -o "$withval" = "yes"
+ then
+ zio=libzio
+ elif test "$withval" = "no"
+ then
+ AC_MSG_ERROR(--with-zio requires an argument)
+ else
+ zio=$withval
+ fi],
+ : ${zio=no})
# Finish the argument parsing.
AC_SUBST(man_owner)dnl
AC_SUBST(man_mode)dnl
@@ -294,6 +305,29 @@ AC_SUBST(gunzip)
AC_SUBST(uncompress)
AC_SUBST(bunzip2)
MAN_COMPRESS_LIB([z], [gzopen])
+dnl Check for zlib and libbz2 libraries to use this together
+dnl with SuSE's libzio to open compressed info files.
+dnl
+if test "$zio" = "no" || test -n "$zio"
+then
+ AC_CHECK_HEADER(zio.h,[
+ for lib in ${zio#lib} zio
+ do
+ AC_CHECK_LIB($lib, fzopen, [LIBS="-l$lib $LIBS"
+ AC_DEFINE([COMP_SRC],[],[Define if you have compressors and want to support compressed cat files.])
+ AC_DEFINE([HAVE_ZIO],[],[Define to 1 if you have libzio for opening compressed manuals])])
+ done])
+ AC_CHECK_HEADER(zlib.h,[
+ for lib in z gz
+ do
+ AC_CHECK_LIB($lib, gzopen, [LIBS="$LIBS -Wl,--no-as-needed -l$lib" ; break])
+ done])
+ AC_CHECK_HEADER(bzlib.h,[
+ for lib in bz2 bzip2
+ do
+ AC_CHECK_LIB($lib, BZ2_bzopen, [LIBS="$LIBS -Wl,--no-as-needed -l$lib" ; break])
+ done])
+fi
dnl To add more decompressors just follow the scheme above.
# Work out which manual page hierarchy scheme might be in use.
--- lib/decompress.c
+++ lib/decompress.c 2008-04-23 10:48:04.431353342 +0000
@@ -36,6 +36,10 @@
# include "zlib.h"
#endif /* HAVE_LIBZ */
+#ifdef HAVE_ZIO
+# include "zio.h"
+#endif /* HAVE_ZIO */
+
#include "manconfig.h"
#include "comp_src.h"
#include "pipeline.h"
@@ -66,6 +70,32 @@ static void decompress_zlib (void *data
#endif /* HAVE_LIBZ */
+#ifdef HAVE_ZIO
+
+static void decompress_zio (void *data)
+{
+ const char *what = (const char*)data;
+ FILE *file;
+
+ file = fdzopen(dup (fileno (stdin)), "r", what);
+ if (!file)
+ return;
+
+ for (;;) {
+ char buffer[4096];
+ int r = fread(buffer, sizeof(char), sizeof(buffer), file);
+ if (r <= 0)
+ break;
+ if (fwrite (buffer, 1, (size_t) r, stdout) < (size_t) r)
+ break;
+ }
+
+ fclose(file);
+ return;
+}
+
+#endif /* HAVE_ZIO */
+
pipeline *decompress_open (const char *filename)
{
command *cmd;
@@ -77,9 +107,53 @@ pipeline *decompress_open (const char *f
char *ext;
struct compression *comp;
- if (stat (filename, &st) < 0 && !S_ISDIR (st.st_mode))
+ if (stat (filename, &st) < 0 || S_ISDIR (st.st_mode))
return NULL;
+#ifdef HAVE_ZIO
+ ext = strrchr(filename, '.');
+ if (ext && STREQ (ext, ".gz")) {
+ /* informational only; no shell quoting concerns */
+ char *name = appendstr (NULL, "zcat < ", filename, NULL);
+ cmd = command_new_function (name, &decompress_zio, "g");
+ free (name);
+ p = pipeline_new_commands (cmd, NULL);
+ if (strcmp(program_name, "mandb") == 0)
+ p->libzio = 1;
+ goto got_pipeline;
+ }
+ if (ext && STREQ (ext, ".z")) {
+ /* informational only; no shell quoting concerns */
+ char *name = appendstr (NULL, "zcat < ", filename, NULL);
+ cmd = command_new_function (name, &decompress_zio, "z");
+ free (name);
+ p = pipeline_new_commands (cmd, NULL);
+ if (strcmp(program_name, "mandb") == 0)
+ p->libzio = 1;
+ goto got_pipeline;
+ }
+ if (ext && STREQ (ext, ".bz2")) {
+ /* informational only; no shell quoting concerns */
+ char *name = appendstr (NULL, "bzcat < ", filename, NULL);
+ cmd = command_new_function (name, &decompress_zio, "b");
+ free (name);
+ p = pipeline_new_commands (cmd, NULL);
+ if (strcmp(program_name, "mandb") == 0)
+ p->libzio = 1;
+ goto got_pipeline;
+ }
+ if (ext && STREQ (ext, ".Z")) {
+ /* informational only; no shell quoting concerns */
+ char *name = appendstr (NULL, "zcat < ", filename, NULL);
+ cmd = command_new_function (name, &decompress_zio, "Z");
+ free (name);
+ p = pipeline_new_commands (cmd, NULL);
+ if (strcmp(program_name, "mandb") == 0)
+ p->libzio = 1;
+ goto got_pipeline;
+ }
+#endif /* HAVE_ZIO */
+
#ifdef HAVE_LIBZ
filename_len = strlen (filename);
if (filename_len > 3 && STREQ (filename + filename_len - 3, ".gz")) {
--- lib/pipeline.c
+++ lib/pipeline.c 2008-04-23 10:52:16.655715088 +0000
@@ -50,6 +50,10 @@
#include "error.h"
#include "pipeline.h"
+#ifdef HAVE_ZIO
+# include "zio.h"
+#endif /* HAVE_ZIO */
+
/* ---------------------------------------------------------------------- */
/* Functions to build individual commands. */
@@ -441,6 +445,9 @@ pipeline *pipeline_new (void)
p->commands = xnmalloc (p->commands_max, sizeof *p->commands);
p->pids = NULL;
p->statuses = NULL;
+#ifdef HAVE_ZIO
+ p->libzio = 0;
+#endif
p->want_in = p->want_out = 0;
p->want_infile = p->want_outfile = NULL;
p->infd = p->outfd = -1;
@@ -479,6 +486,9 @@ pipeline *pipeline_join (pipeline *p1, p
pipeline *p = XMALLOC (pipeline);
int i;
+#ifdef HAVE_ZIO
+ assert (p->libzio);
+#endif
assert (!p1->pids);
assert (!p2->pids);
assert (!p1->statuses);
@@ -614,6 +624,9 @@ void pipeline_commands (pipeline *p, ...
FILE *pipeline_get_infile (pipeline *p)
{
+#ifdef HAVE_ZIO
+ assert (!p->libzio);
+#endif
assert (p->pids); /* pipeline started */
assert (p->statuses);
if (p->infile)
@@ -627,6 +640,12 @@ FILE *pipeline_get_infile (pipeline *p)
FILE *pipeline_get_outfile (pipeline *p)
{
+#ifdef HAVE_ZIO
+ if (p->libzio) {
+ assert (p->outfile != (FILE*)0);
+ return p->outfile;
+ }
+#endif
assert (p->pids); /* pipeline started */
assert (p->statuses);
if (p->outfile)
@@ -707,6 +726,24 @@ void pipeline_start (pipeline *p)
int infd[2];
sigset_t set, oset;
+#ifdef HAVE_ZIO
+ if (p->ncommands != 1) /* A pipe to the following commands required */
+ p->libzio = 0;
+
+ if (p->libzio) {
+ struct command_function *cmdf;
+
+ assert (p->ncommands == 1);
+ assert (p->commands[0]->tag == COMMAND_FUNCTION);
+ assert (p->want_infile != NULL);
+
+ cmdf = &p->commands[0]->u.function;
+
+ p->outfile = fzopen(p->want_infile, "r");
+
+ return;
+ }
+#endif
/* Flush all pending output so that subprocesses don't inherit it. */
fflush (NULL);
@@ -1009,6 +1046,19 @@ int pipeline_wait (pipeline *p)
pipeline_dump (p, stderr);
}
+#ifdef HAVE_ZIO
+ if (p->libzio) {
+ assert (p->outfile != (FILE*)0);
+ if (fclose (p->outfile)) {
+ error (0, errno, _("closing pipeline output stream failed"));
+ ret = 1;
+ }
+ p->outfile = (FILE*)0;
+ p->outfd = -1;
+ return ret;
+ }
+#endif
+
assert (p->pids); /* pipeline started */
assert (p->statuses);
@@ -1549,11 +1599,20 @@ static const char *get_block (pipeline *
if (!peek)
p->peek_offset = 0;
-
+#ifdef HAVE_ZIO
+ if (p->libzio) {
+ assert (p->outfile != (FILE*)0);
+ r = fread (p->buffer + readstart, sizeof(char), toread, p->outfile);
+ goto out;
+ }
+#endif
assert (p->outfd != -1);
r = read (p->outfd, p->buffer + readstart, toread);
if (r == -1)
return NULL;
+#ifdef HAVE_ZIO
+out:
+#endif
p->buflen = readstart + r;
if (peek)
p->peek_offset += r;
--- lib/pipeline.h
+++ lib/pipeline.h 2008-04-22 13:52:44.846881571 +0000
@@ -60,6 +60,14 @@ typedef struct pipeline {
pid_t *pids;
int *statuses; /* -1 until command exits */
+#ifdef HAVE_ZIO
+ /*
+ * Uses for e.g. simple decompression the help of libzio.
+ * Do not fork in this case but open the compressed files.
+ */
+ int libzio;
+#endif
+
/* To be set by the caller. If positive, these contain
* caller-supplied file descriptors for the input and output of the
* whole pipeline. If negative, pipeline_start() will create pipes
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