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man-db-2.7.1-zio.dif
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File man-db-2.7.1-zio.dif of Package man
--- config.h.in | 3 + configure.ac | 52 +++++++++++++++++++++++++++++++++ src/decompress.c | 86 +++++++++++++++++++++++++++++++++++++++++++++++++++++-- 3 files changed, 138 insertions(+), 3 deletions(-) --- config.h.in +++ config.h.in 2024-11-11 10:43:01.369880933 +0000 @@ -1148,6 +1148,9 @@ /* 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 the bcrypt library is guaranteed to be present. */ #undef HAVE_LIB_BCRYPT --- configure.ac +++ configure.ac 2024-11-11 10:43:01.369880933 +0000 @@ -35,6 +35,18 @@ MAN_ARG_DEVICE MAN_ARG_DB MAN_ARG_CONFIG_FILE MAN_ARG_SECTIONS +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], + [: ${zio=no}]) MAN_ARG_AUTOMATIC_CREATE MAN_ARG_AUTOMATIC_UPDATE MAN_ARG_CATS @@ -374,6 +386,46 @@ AC_DEFINE_UNQUOTED([PROG_UNXZ], ["$unxz" AC_DEFINE_UNQUOTED([PROG_UNLZIP], ["$unlzip"], [Program to use as unlzip.]) AC_DEFINE_UNQUOTED([PROG_UNZSTD], ["$unzstd"], [Program to use as unzstd.]) 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 $LIBS"; am_cv_libzio=yes]) + done + ]) + if test "$am_cv_libzio" = yes; then + 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]) + 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 + ]) + AC_CHECK_HEADER(lzmadec.h, [ + for lib in lzma lzmadec + do + AC_CHECK_LIB($lib, lzmadec_open, [LIBS="$LIBS -Wl,--no-as-needed -l$lib"; break]) + done + ]) + AC_CHECK_HEADER(lzma.h, [ + for lib in lzma + do + AC_CHECK_LIB($lib, lzma_easy_encoder, [LIBS="$LIBS -Wl,--no-as-needed -l$lib"; break]) + done + ]) + fi +fi dnl To add more decompressors just follow the scheme above. # Check for various header files and associated libraries. --- src/decompress.c +++ src/decompress.c 2024-11-11 10:44:24.036386441 +0000 @@ -40,12 +40,17 @@ #include "pipeline.h" +#include "appendstr.h" #include "attribute.h" #include "minmax.h" #include "xalloc.h" #include "xstrndup.h" #include "xvasprintf.h" +#ifdef HAVE_ZIO +# include "zio.h" +#endif /* HAVE_ZIO */ + #include "manconfig.h" #include "compression.h" @@ -146,7 +151,11 @@ static void decompress_zlib (void *data static decompress *decompress_try_zlib (const char *filename) { +#ifdef HAVE_ZIO + FILE *file; +#else gzFile zlibfile; +#endif /* We only ever call this from the parent process (and don't * currently use threads), and this lets us skip per-file memory * allocation. @@ -154,18 +163,32 @@ static decompress *decompress_try_zlib ( static char buffer[MAX_INPROCESS]; int len = 0; +#ifdef HAVE_ZIO + file = fzopen(filename, "r"); + if (!file) + return NULL; +#else zlibfile = gzopen (filename, "r"); if (!zlibfile) return NULL; +#endif while (len < MAX_INPROCESS) { /* Read one more byte than we're prepared to return, in * order to detect EOF at the right position. The "len >= * MAX_INPROCESS" check below catches the boundary case. */ +#ifdef HAVE_ZIO + int r = fread(buffer + len, sizeof(char), MAX_INPROCESS - len, file); +#else int r = gzread (zlibfile, buffer + len, MAX_INPROCESS - len); +#endif if (r < 0) { +#ifdef HAVE_ZIO + fclose(file); +#else gzclose (zlibfile); +#endif return NULL; } else if (r == 0) break; @@ -173,7 +196,11 @@ static decompress *decompress_try_zlib ( len += r; } +#ifdef HAVE_ZIO + fclose(file); +#else gzclose (zlibfile); +#endif if (len >= MAX_INPROCESS) return NULL; /* Copy input data so that we don't have potential data corruption @@ -189,33 +216,86 @@ static decompress *decompress_try_zlib ( # define OPEN_FLAGS_UNUSED MAYBE_UNUSED #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 */ + decompress *decompress_open (const char *filename, int flags OPEN_FLAGS_UNUSED) { pipecmd *cmd; pipeline *p; struct stat st; #ifdef HAVE_LIBZ +# ifdef HAVE_ZIO + char *ext; +# else size_t filename_len; +# endif #endif /* HAVE_LIBZ */ - char *ext; struct compression *comp; if (stat (filename, &st) < 0 || S_ISDIR (st.st_mode)) return NULL; #ifdef HAVE_LIBZ +# ifdef HAVE_ZIO + ext = strrchr (filename, '.'); + if (ext && ( + STREQ (ext, ".gz") || + STREQ (ext, ".z") || + STREQ (ext, ".bz2") || + STREQ (ext, ".xz") || + STREQ (ext, ".lzma") || + STREQ (ext, ".Z") + )) { +# else filename_len = strlen (filename); if (filename_len > 3 && STREQ (filename + filename_len - 3, ".gz")) { +# endif if (flags & DECOMPRESS_ALLOW_INPROCESS) { decompress *d = decompress_try_zlib (filename); if (d) return d; } - +# ifdef HAVE_ZIO + static char opt[2] = {'\0','\0'}; + char *name = NULL; + + opt[0] = ext[1]; + + /* informational only; no shell quoting concerns */ + name = appendstr (NULL, "libzio < ", filename, (void *) 0); + cmd = pipecmd_new_function (name, &decompress_zio, NULL, + (void *)opt); +# else cmd = pipecmd_new_function ("zcat", &decompress_zlib, NULL, NULL); +# endif pipecmd_pre_exec (cmd, sandbox_load, sandbox_free, sandbox); p = pipeline_new_commands (cmd, nullptr); +# ifdef HAVE_ZIO + free (name); +# endif goto got_pipeline; } #endif /* HAVE_LIBZ */ @@ -313,7 +393,7 @@ void decompress_inprocess_replace (decom void decompress_start (decompress *d) { - if (d->tag == DECOMPRESS_PIPELINE) + if (d && d->tag == DECOMPRESS_PIPELINE) pipeline_start (d->u.p); }
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