diff options
Diffstat (limited to 'miscutils')
| -rw-r--r-- | miscutils/Config.in | 6 | ||||
| -rw-r--r-- | miscutils/Kbuild | 1 | ||||
| -rw-r--r-- | miscutils/man.c | 151 |
3 files changed, 158 insertions, 0 deletions
diff --git a/miscutils/Config.in b/miscutils/Config.in index c6c1490df..06cac14ab 100644 --- a/miscutils/Config.in +++ b/miscutils/Config.in @@ -372,6 +372,12 @@ config FEATURE_MAKEDEVS_TABLE endchoice +config MAN + bool "man" + default n + help + Format and display manual pages. + config MICROCOM bool "microcom" default n diff --git a/miscutils/Kbuild b/miscutils/Kbuild index 513c03882..ba2a0dc14 100644 --- a/miscutils/Kbuild +++ b/miscutils/Kbuild @@ -19,6 +19,7 @@ lib-$(CONFIG_HDPARM) += hdparm.o lib-$(CONFIG_LAST) += last.o lib-$(CONFIG_LESS) += less.o lib-$(CONFIG_MAKEDEVS) += makedevs.o +lib-$(CONFIG_MAN) += man.o lib-$(CONFIG_MICROCOM) += microcom.o lib-$(CONFIG_MOUNTPOINT) += mountpoint.o lib-$(CONFIG_MT) += mt.o diff --git a/miscutils/man.c b/miscutils/man.c new file mode 100644 index 000000000..ed31b66c7 --- /dev/null +++ b/miscutils/man.c @@ -0,0 +1,151 @@ +/* mini man implementation for busybox + * Copyright (C) 2008 Denys Vlasenko <vda.linux@googlemail.com> + * Licensed under GPLv2, see file LICENSE in this tarball for details. + */ + +#include "libbb.h" + +enum { + OPT_a = 1, /* all */ + OPT_w = 2, /* print path */ +}; + +/* This is what I see on my desktop system deing executed: + +( +echo ".ll 12.4i" +echo ".nr LL 12.4i" +echo ".pl 1100i" +gunzip -c '/usr/man/man1/bzip2.1.gz' +echo ".\\\"" +echo ".pl \n(nlu+10" +) | gtbl | nroff -Tlatin1 -mandoc | less + +*/ + +static int run_pipe(const char *unpacker, const char *pager, char *man_filename) +{ + char *cmd; + + if (access(man_filename, R_OK) != 0) + return 0; + + if (option_mask32 & OPT_w) { + puts(man_filename); + return 1; + } + + cmd = xasprintf("%s '%s' | gtbl | nroff -Tlatin1 -mandoc | %s", + unpacker, man_filename, pager); + system(cmd); + free(cmd); + return 1; +} + +/* man_filename is of the form "/dir/dir/dir/name.s.bz2" */ +static int show_manpage(const char *pager, char *man_filename) +{ + int len; + + if (run_pipe("bunzip2 -c", pager, man_filename)) + return 1; + + len = strlen(man_filename) - 1; + + man_filename[len] = '\0'; /* ".bz2" -> ".gz" */ + man_filename[len - 2] = 'g'; + if (run_pipe("gunzip -c", pager, man_filename)) + return 1; + + man_filename[len - 3] = '\0'; /* ".gz" -> "" */ + if (run_pipe("cat", pager, man_filename)) + return 1; + + return 0; +} + +int man_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +int man_main(int argc ATTRIBUTE_UNUSED, char **argv) +{ + FILE *cf; + const char *pager; + char *man_path, *sec_list; + char *cur_path, *cur_sect; + char *line, *value; + int opt; + + opt_complementary = "-1"; /* at least one argument */ + opt = getopt32(argv, "+aw"); + argv += optind; + + sec_list = xstrdup("1:2:3:4:5:6:7:8:9"); + man_path = xstrdup(getenv("MANPATH")); + pager = getenv("MANPAGER"); + if (!pager) { + pager = getenv("PAGER"); + if (!pager) + pager = "more"; + } + + /* Parse man.conf */ + cf = fopen_or_warn("/etc/man.conf", "r"); + if (cf) { + /* go through man configuration file and search relevant paths, sections */ + while ((line = xmalloc_fgetline(cf)) != NULL) { + trim(line); /* remove whitespace at the beginning/end */ + if (isspace(line[7])) { + line[7] = '\0'; + value = skip_whitespace(&line[8]); + *skip_non_whitespace(value) = '\0'; + if (strcmp("MANPATH", line) == 0) { + free(man_path); + man_path = xstrdup(value); + } + if (strcmp("MANSECT", line) == 0) { + free(sec_list); + sec_list = xstrdup(value); + } + } + free(line); + } + fclose(cf); + } + + do { /* for each argv[] */ + cur_path = man_path; + do { /* for each MANPATH item */ + char *next_path = strchrnul(cur_path, ':'); + int path_len = next_path - cur_path; + + cur_sect = sec_list; + do { /* for each section */ + char *next_sect = strchrnul(cur_sect, ':'); + int sect_len = next_sect - cur_sect; + + char *man_filename = xasprintf("%.*s/man%.*s/%s.%.*s" ".bz2", + path_len, cur_path, + sect_len, cur_sect, + *argv, + sect_len, cur_sect); + if (show_manpage(pager, man_filename)) { + if (!(opt & OPT_a)) { + goto next_arg; + } + } + free(man_filename); + + cur_sect = next_sect; + while (*cur_sect == ':') + cur_sect++; + } while (*cur_sect); + + cur_path = next_path; + while (*cur_path == ':') + cur_path++; + } while (*cur_path); + next_arg: + argv++; + } while (*argv); + + return EXIT_SUCCESS; +} |