ed: add support for -p command-line option as mandated by POSIX
The POSIX.1-2008 specification of ed(1) mandates two command-line
options: -p (for specifying a prompt string) and -s (to suppress writing
of byte counts). This commit adds support for the former. Furthermore,
it also changes the default prompt string to an empty string (instead
of ": ") since this is also mandated by POSIX:
-p string Use string as the prompt string when in command mode.
By default, there shall be no prompt string.
function old new delta
ed_main 112 144 +32
packed_usage 34074 34097 +23
doCommands 1889 1887 -2
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/1 up/down: 55/-2) Total: 53 bytes
Signed-off-by: Sören Tempel <soeren+git@soeren-tempel.net>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/editors/ed.c b/editors/ed.c
index 14540e5..18faba5 100644
--- a/editors/ed.c
+++ b/editors/ed.c
@@ -18,7 +18,7 @@
//applet:IF_ED(APPLET(ed, BB_DIR_BIN, BB_SUID_DROP))
-//usage:#define ed_trivial_usage "[FILE]"
+//usage:#define ed_trivial_usage "[-p PROMPT] [FILE]"
//usage:#define ed_full_usage ""
#include "libbb.h"
@@ -48,6 +48,7 @@
char *bufBase;
char *bufPtr;
char *fileName;
+ const char *prompt;
LINE lines;
smallint dirty;
int marks[26];
@@ -57,6 +58,7 @@
#define bufBase (G.bufBase )
#define bufPtr (G.bufPtr )
#define fileName (G.fileName )
+#define prompt (G.prompt )
#define curNum (G.curNum )
#define lastNum (G.lastNum )
#define bufUsed (G.bufUsed )
@@ -793,7 +795,7 @@
* 0 on ctrl-C,
* >0 length of input string, including terminating '\n'
*/
- len = read_line_input(NULL, ": ", buf, sizeof(buf));
+ len = read_line_input(NULL, prompt, buf, sizeof(buf));
if (len <= 0)
return;
while (len && isspace(buf[--len]))
@@ -1005,8 +1007,12 @@
lines.next = &lines;
lines.prev = &lines;
- if (argv[1]) {
- fileName = xstrdup(argv[1]);
+ prompt = ""; /* no prompt by default */
+ getopt32(argv, "p:", &prompt);
+ argv += optind;
+
+ if (argv[0]) {
+ fileName = xstrdup(argv[0]);
if (!readLines(fileName, 1)) {
return EXIT_SUCCESS;
}