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ed: add support for -s command-line option as mandated by POSIX

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Apart from the -p option, POSIX also mandates an -s option which
suppresses the output of byte counts for the e, E, r, and w command.
From these commands, Busybox ed presently only implements the r and w
commands. This commit ensures that these two command do not output any
bytes counts when the -s option is passed. The shell escape command,
also effected by the -s option, is not implemented by Busybox at the
moment.

function                                             old     new   delta
packed_usage                                       34096   34115     +19
doCommands                                          1887    1900     +13
readLines                                            388     397      +9
.rodata                                           104196  104200      +4
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 4/0 up/down: 45/0)               Total: 45 bytes

Signed-off-by: Sören Tempel <soeren+git@soeren-tempel.net>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Sören Tempel
2021-12-29 16:15:50 +01:00
committed by Denys Vlasenko
parent 0e2cb6d1e2
commit 9173c9cce4
1 changed files with 11 additions and 4 deletions
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15
editors/ed.c
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@@ -18,7 +18,7 @@
//applet:IF_ED(APPLET(ed, BB_DIR_BIN, BB_SUID_DROP))
//usage:#define ed_trivial_usage "[-p PROMPT] [FILE]"
//usage:#define ed_trivial_usage "[-p PROMPT] [-s] [FILE]"
//usage:#define ed_full_usage ""
#include "libbb.h"
@@ -71,6 +71,11 @@ struct globals {
SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
} while (0)
#define OPTION_STR "sp:"
enum {
OPT_s = (1 << 0),
};
static int bad_nums(int num1, int num2, const char *for_what)
{
if ((num1 < 1) || (num2 > lastNum) || (num1 > num2)) {
@@ -458,7 +463,8 @@ static int readLines(const char *file, int num)
* in the following format:
* "%d\n", <number of bytes read>
*/
printf("%u\n", charCount);
if (!(option_mask32 & OPT_s))
printf("%u\n", charCount);
return TRUE;
}
@@ -510,7 +516,8 @@ static int writeLines(const char *file, int num1, int num2)
* unless the -s option was specified, in the following format:
* "%d\n", <number of bytes written>
*/
printf("%u\n", charCount);
if (!(option_mask32 & OPT_s))
printf("%u\n", charCount);
return TRUE;
}
@@ -1005,7 +1012,7 @@ int ed_main(int argc UNUSED_PARAM, char **argv)
lines.prev = &lines;
prompt = ""; /* no prompt by default */
getopt32(argv, "p:", &prompt);
getopt32(argv, OPTION_STR, &prompt);
argv += optind;
if (argv[0]) {