dc: fix "dc does_not_exist" SEGVing

[oweals/busybox.git] / miscutils / man.c

diff --git a/miscutils/man.c b/miscutils/man.c
index 01382c4d7197ab4b9db84f793c3991a3b33e925f..ba6bb4c01f6df7a2570a37fbab53594cd3e63921 100644 (file)
--- a/miscutils/man.c
+++ b/miscutils/man.c
@@ -2,6 +2,15 @@
  * Copyright (C) 2008 Denys Vlasenko <vda.linux@googlemail.com>
  * Licensed under GPLv2, see file LICENSE in this source tree.
  */
+//config:config MAN
+//config:      bool "man (27 kb)"
+//config:      default y
+//config:      help
+//config:      Format and display manual pages.
+
+//applet:IF_MAN(APPLET(man, BB_DIR_USR_BIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_MAN) += man.o
 
 //usage:#define man_trivial_usage
 //usage:       "[-aw] [MANPAGE]..."
@@ -9,6 +18,8 @@
 //usage:       "Format and display manual page\n"
 //usage:     "\n       -a      Display all pages"
 //usage:     "\n       -w      Show page locations"
+//usage:     "\n"
+//usage:     "\n$COLUMNS overrides output width"
 
 #include "libbb.h"
 #include "common_bufsiz.h"
@@ -28,6 +39,8 @@ echo ".\\\""
 echo ".pl \n(nlu+10"
 ) | gtbl | nroff -Tlatin1 -mandoc | less
 
+Some systems use -Tascii.
+
 On another system I see this:
 
 ... | tbl | nroff -mandoc -rLL=<NNN>n -rLT=<NNN>n -Tutf8 | less
@@ -53,8 +66,8 @@ struct globals {
        setup_common_bufsiz(); \
        G.col = "col"; \
        G.tbl = "tbl"; \
-       /* replaced -Tlatin1 with -Tascii for non-UTF8 displays */; \
-       G.nroff = "nroff -mandoc -Tascii"; \
+       /* Removed -Tlatin1. Assuming system nroff has suitable default */ \
+       G.nroff = "nroff -mandoc"; \
        G.pager = ENABLE_LESS ? "less" : "more"; \
 } while (0)
 
@@ -132,15 +145,12 @@ static int run_pipe(char *man_filename, int man, int level)
        close(STDIN_FILENO);
        open_zipped(man_filename, /*fail_if_not_compressed:*/ 0); /* guaranteed to use fd 0 (STDIN_FILENO) */
        if (man) {
-               /* "man man" formats to screen width.
-                * "man man >file" formats to default 80 columns.
-                * "man man | cat" formats to default 80 columns.
-                */
-               int w = get_terminal_width(STDOUT_FILENO);
+               int w = get_terminal_width(-1);
                if (w > 10)
                        w -= 2;
                /* "2>&1" is added so that nroff errors are shown in pager too.
-                * Otherwise it may show just empty screen */
+                * Otherwise it may show just empty screen.
+                */
                cmd = xasprintf("%s | %s -rLL=%un -rLT=%un 2>&1 | %s",
                                G.tbl, G.nroff, w, w,
                                G.pager);
@@ -243,8 +253,7 @@ int man_main(int argc UNUSED_PARAM, char **argv)
 
        INIT_G();
 
-       opt_complementary = "-1"; /* at least one argument */
-       opt = getopt32(argv, "+aw");
+       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");