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man: implement SECTION parameters

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function                                             old     new   delta
man_main                                             807     942    +135
is_section_name                                        -      52     +52
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(add/remove: 1/0 grow/shrink: 1/0 up/down: 187/0)             Total: 187 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2020-12-27 16:02:37 +01:00
parent cad20ced86
commit 1462673dde
1 changed files with 35 additions and 6 deletions
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41
miscutils/man.c
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@ -13,7 +13,7 @@
//kbuild:lib-$(CONFIG_MAN) += man.o
//usage:#define man_trivial_usage
//usage: "[-aw] MANPAGE..."
//usage: "[-aw] [SECTION] MANPAGE[.SECTION]..."
//usage:#define man_full_usage "\n\n"
//usage: "Display manual page\n"
//usage: "\n -a Display all pages"
@ -240,10 +240,21 @@ static const char *if_redefined(const char *var, const char *key, const char *li
return xstrdup(skip_whitespace(line));
}
static int is_section_name(const char *sections, const char *str)
{
const char *s = strstr(sections, str);
if (s) {
int l = strlen(str);
return (s[l] == ':' || s[l] == '\0');
}
return 0;
}
int man_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int man_main(int argc UNUSED_PARAM, char **argv)
{
parser_t *parser;
char *conf_sec_list;
char *sec_list;
char **man_path_list;
int count_mp;
@ -255,7 +266,7 @@ int man_main(int argc UNUSED_PARAM, char **argv)
opt = getopt32(argv, "^+" "aw" "\0" "-1"/*at least one arg*/);
argv += optind;
sec_list = xstrdup("0p:1:1p:2:3:3p:4:5:6:7:8:9");
conf_sec_list = xstrdup("0p:1:1p:2:3:3p:4:5:6:7:8:9");
count_mp = 0;
man_path_list = add_MANPATH(NULL, &count_mp,
@ -285,8 +296,8 @@ int man_main(int argc UNUSED_PARAM, char **argv)
man_path_list = add_MANPATH(man_path_list, &count_mp, token[1]);
}
if (strcmp("MANSECT", token[0]) == 0) {
free(sec_list);
sec_list = xstrdup(token[1]);
free(conf_sec_list);
conf_sec_list = xstrdup(token[1]);
}
}
config_close(parser);
@ -311,6 +322,13 @@ int man_main(int argc UNUSED_PARAM, char **argv)
G.pager = xasprintf("%s -b -p -x", G.col);
}
/* is 1st ARG a SECTION? */
sec_list = conf_sec_list;
if (is_section_name(conf_sec_list, *argv)) {
/* yes */
sec_list = *argv++;
}
not_found = 0;
do { /* for each argv[] */
const char *cur_path;
@ -321,11 +339,20 @@ int man_main(int argc UNUSED_PARAM, char **argv)
found = show_manpage(*argv, /*man:*/ 1, 0);
goto check_found;
}
/* for each MANPATH */
cur_mp = 0;
while ((cur_path = man_path_list[cur_mp++]) != NULL) {
/* for each MANPATH */
const char *cur_sect = sec_list;
do { /* for each section */
/* is MANPAGE of the form NAME.SECTION? */
char *sect_ext = strrchr(*argv, '.');
if (sect_ext && is_section_name(conf_sec_list, sect_ext + 1)) {
*sect_ext = '\0';
cur_sect = sect_ext + 1;
}
do { /* for each SECTION in cur_sect */
char *next_sect = strchrnul(cur_sect, ':');
int sect_len = next_sect - cur_sect;
char *man_filename;
@ -352,6 +379,8 @@ int man_main(int argc UNUSED_PARAM, char **argv)
while (*cur_sect == ':')
cur_sect++;
} while (*cur_sect);
if (sect_ext) *sect_ext = '.';
}
check_found:
if (!found) {