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cat: allow compiling out -n and -b

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When these options were introduced in d88f94a5df
it provides no config options to compile them out. Now provide one.

Introduce config FEATURE_CATN.

Signed-off-by: Kang-Che Sung <explorer09@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Kang-Che Sung 2017-07-14 09:56:13 +02:00 committed by Denys Vlasenko
parent 38d966943f
commit a2bdc5c554
1 changed files with 38 additions and 21 deletions
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59
coreutils/cat.c
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@ -13,6 +13,13 @@
//config: cat is used to concatenate files and print them to the standard
//config: output. Enable this option if you wish to enable the 'cat' utility.
//config:
//config:config FEATURE_CATN
//config: bool "Enable -n and -b options"
//config: default y
//config: depends on CAT
//config: help
//config: -n numbers all output lines while -b numbers nonempty output lines.
//config:
//config:config FEATURE_CATV
//config: bool "cat -v[etA]"
//config: default y
@ -27,12 +34,19 @@
/* BB_AUDIT SUSv3 compliant */
/* http://www.opengroup.org/onlinepubs/007904975/utilities/cat.html */
//usage:#if ENABLE_FEATURE_CATN || ENABLE_FEATURE_CATV
//usage:#define cat_trivial_usage
//usage: "[-nb"IF_FEATURE_CATV("vteA")"] [FILE]..."
//usage: "[-" IF_FEATURE_CATN("nb") IF_FEATURE_CATV("vteA") "] [FILE]..."
//usage:#else
//usage:#define cat_trivial_usage
//usage: "[FILE]..."
//usage:#endif
//usage:#define cat_full_usage "\n\n"
//usage: "Print FILEs to stdout\n"
//usage: IF_FEATURE_CATN(
//usage: "\n -n Number output lines"
//usage: "\n -b Number nonempty lines"
//usage: )
//usage: IF_FEATURE_CATV(
//usage: "\n -v Show nonprinting characters as ^x or M-x"
//usage: "\n -t ...and tabs as ^I"
@ -84,7 +98,7 @@
* I agree with the argument. Unfortunately, this ship has sailed (1983...).
* There are dozens of Linux distros and each of them has "cat" which supports -v.
* It's unrealistic for us to "reeducate" them to use our, incompatible way
* to achieve "cat -v" effect. The actuall effect would be "users pissed off
* to achieve "cat -v" effect. The actual effect would be "users pissed off
* by gratuitous incompatibility".
*/
#define CATV_OPT_e (1<<0)
@ -147,7 +161,7 @@ int cat_main(int argc UNUSED_PARAM, char **argv)
IF_FEATURE_CATV(opt_complementary = "Aetv"; /* -A == -vet */)
/* -u is ignored ("unbuffered") */
opts = getopt32(argv, IF_FEATURE_CATV("etvA")"nbu");
opts = getopt32(argv, IF_FEATURE_CATV("etvA") IF_FEATURE_CATN("nb") "u");
argv += optind;
#if ENABLE_FEATURE_CATV
@ -157,23 +171,26 @@ int cat_main(int argc UNUSED_PARAM, char **argv)
opts >>= 4;
#endif
#define CAT_OPT_n (1<<0)
#define CAT_OPT_b (1<<1)
#define CAT_OPT_u (1<<2)
if (!(opts & (CAT_OPT_n|CAT_OPT_b))) /* no -n or -b */
return bb_cat(argv);
#if ENABLE_FEATURE_CATN
# define CAT_OPT_n (1<<0)
# define CAT_OPT_b (1<<1)
if (opts & (CAT_OPT_n|CAT_OPT_b)) { /* -n or -b */
if (!*argv)
*--argv = (char*)"-";
ns.width = 6;
ns.start = 1;
ns.inc = 1;
ns.sep = "\t";
ns.empty_str = "\n";
ns.all = !(opts & CAT_OPT_b); /* -n without -b */
ns.nonempty = (opts & CAT_OPT_b); /* -b (with or without -n) */
do {
print_numbered_lines(&ns, *argv);
} while (*++argv);
fflush_stdout_and_exit(EXIT_SUCCESS);
}
/*opts >>= 2;*/
#endif
if (!*argv)
*--argv = (char*)"-";
ns.width = 6;
ns.start = 1;
ns.inc = 1;
ns.sep = "\t";
ns.empty_str = "\n";
ns.all = !(opts & CAT_OPT_b); /* -n without -b */
ns.nonempty = (opts & CAT_OPT_b); /* -b (with or without -n) */
do {
print_numbered_lines(&ns, *argv);
} while (*++argv);
fflush_stdout_and_exit(EXIT_SUCCESS);
return bb_cat(argv);
}