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man: teach it to use .lzma if requested by .config

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man: fix a case when a full pathname to manpage is given
This commit is contained in:
Denis Vlasenko 2008-08-05 15:28:05 +00:00
parent e2a09de415
commit 0e7f28d674
1 changed files with 46 additions and 24 deletions
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70
miscutils/man.c
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@ -23,16 +23,19 @@ echo ".pl \n(nlu+10"
*/
/* Trick gcc to reuse "cat" string. */
#define STR_catNULmanNUL "cat\0man"
#define STR_cat "cat\0man"
//TODO: make gz/bz2 support conditional on FEATURE_SEAMLESS_GZ/BZ2,
// add SEAMLESS_LZMA support
#if ENABLE_FEATURE_SEAMLESS_LZMA
#define Z_SUFFIX ".lzma"
#elif ENABLE_FEATURE_SEAMLESS_BZ2
#define Z_SUFFIX ".bz2"
#elif ENABLE_FEATURE_SEAMLESS_GZ
#define Z_SUFFIX ".gz"
#else
#define Z_SUFFIX ""
#endif
static int show_manpage(const char *pager, char *man_filename, int man, int level);
static int run_pipe(const char *unpacker, const char *pager, char *man_filename, int man, int level)
static int run_pipe(const char *pager, char *man_filename, int man, int level)
{
char *cmd;
@ -92,7 +95,7 @@ static int run_pipe(const char *unpacker, const char *pager, char *man_filename,
/* Links do not have .gz extensions, even if manpage
* is compressed */
man_filename = xasprintf("%s/%s" ".bz2", man_filename, linkname);
man_filename = xasprintf("%s/%s" Z_SUFFIX, man_filename, linkname);
free(line);
/* Note: we leak "new" man_filename string as well... */
if (show_manpage(pager, man_filename, man, level + 1))
@ -101,34 +104,47 @@ static int run_pipe(const char *unpacker, const char *pager, char *man_filename,
}
ordinary_manpage:
close(STDIN_FILENO);
open_zipped(man_filename); /* guaranteed to use fd 0 (STDIN_FILENO) */
/* "2>&1" is added so that nroff errors are shown in pager too.
* Otherwise it may show just empty screen */
cmd = xasprintf(
man ? "%s '%s' 2>&1 | gtbl | nroff -Tlatin1 -mandoc 2>&1 | %s"
: "%s '%s' 2>&1 | %s",
unpacker, man_filename, pager);
man ? "gtbl | nroff -Tlatin1 -mandoc 2>&1 | %s"
: "%s",
pager);
system(cmd);
free(cmd);
return 1;
}
/* man_filename is of the form "/dir/dir/dir/name.s.bz2" */
/* man_filename is of the form "/dir/dir/dir/name.s" Z_SUFFIX */
static int show_manpage(const char *pager, char *man_filename, int man, int level)
{
int len;
if (run_pipe("bunzip2 -c", pager, man_filename, man, level))
#if ENABLE_FEATURE_SEAMLESS_LZMA
if (run_pipe(pager, man_filename, man, level))
return 1;
#endif
len = strlen(man_filename) - 1;
man_filename[len] = '\0'; /* ".bz2" -> ".gz" */
man_filename[len - 2] = 'g';
if (run_pipe("gunzip -c", pager, man_filename, man, level))
#if ENABLE_FEATURE_SEAMLESS_BZ2
#if ENABLE_FEATURE_SEAMLESS_LZMA
strcpy(strrchr(man_filename, '.') + 1, "bz2");
#endif
if (run_pipe(pager, man_filename, man, level))
return 1;
#endif
man_filename[len - 3] = '\0'; /* ".gz" -> "" */
if (run_pipe(STR_cat, pager, man_filename, man, level))
#if ENABLE_FEATURE_SEAMLESS_GZ
#if ENABLE_FEATURE_SEAMLESS_LZMA || ENABLE_FEATURE_SEAMLESS_BZ2
strcpy(strrchr(man_filename, '.') + 1, "gz");
#endif
if (run_pipe(pager, man_filename, man, level))
return 1;
#endif
#if ENABLE_FEATURE_SEAMLESS_LZMA || ENABLE_FEATURE_SEAMLESS_BZ2 || ENABLE_FEATURE_SEAMLESS_GZ
*strrchr(man_filename, '.') = '\0';
#endif
if (run_pipe(pager, man_filename, man, level))
return 1;
return 0;
@ -187,6 +203,11 @@ int man_main(int argc UNUSED_PARAM, char **argv)
do { /* for each argv[] */
int found = 0;
cur_mp = 0;
if (strchr(*argv, '/')) {
found = show_manpage(pager, *argv, /*man:*/ 1, 0);
goto check_found;
}
while ((cur_path = man_path_list[cur_mp++]) != NULL) {
/* for each MANPATH */
do { /* for each MANPATH item */
@ -202,9 +223,9 @@ int man_main(int argc UNUSED_PARAM, char **argv)
/* Search for cat, then man page */
while (cat0man1 < 2) {
int found_here;
man_filename = xasprintf("%.*s/%s%.*s/%s.%.*s" ".bz2",
man_filename = xasprintf("%.*s/%s%.*s/%s.%.*s" Z_SUFFIX,
path_len, cur_path,
STR_catNULmanNUL + cat0man1 * 4,
"cat\0man" + (cat0man1 * 4),
sect_len, cur_sect,
*argv,
sect_len, cur_sect);
@ -225,6 +246,7 @@ int man_main(int argc UNUSED_PARAM, char **argv)
cur_path++;
} while (*cur_path);
}
check_found:
if (!found) {
bb_error_msg("no manual entry for '%s'", *argv);
not_found = 1;