aboutsummaryrefslogtreecommitdiff
path: root/qemu-io.c
diff options
context:
space:
mode:
authorStefan Hajnoczi <stefanha@redhat.com>2013-11-14 11:54:17 +0100
committerKevin Wolf <kwolf@redhat.com>2014-01-22 12:07:17 +0100
commit0cf17e181798063c3824c8200ba46f25f54faa1a (patch)
tree173ae70f1d25c7d3b5ac3cc09c6e94e48cd96d8b /qemu-io.c
parent13401ba0b982024b62a99388032bbb889dc98b43 (diff)
qemu-io: use readline.c
Use readline.c for command-line history. There was support for GNU Readline and BSD Editline but it was never compiled in. Since QEMU has its own readline.c, just use that when qemu-io runs with stdin attached to a terminal. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'qemu-io.c')
-rw-r--r--qemu-io.c103
1 files changed, 58 insertions, 45 deletions
diff --git a/qemu-io.c b/qemu-io.c
index 3b3340ab1b..d7c26d3ed0 100644
--- a/qemu-io.c
+++ b/qemu-io.c
@@ -18,6 +18,7 @@
#include "qemu/main-loop.h"
#include "qemu/option.h"
#include "qemu/config-file.h"
+#include "qemu/readline.h"
#include "block/block_int.h"
#include "trace/control.h"
@@ -32,6 +33,8 @@ extern int qemuio_misalign;
static int ncmdline;
static char **cmdline;
+static ReadLineState *readline_state;
+
static int close_f(BlockDriverState *bs, int argc, char **argv)
{
bdrv_unref(bs);
@@ -203,14 +206,6 @@ static void usage(const char *name)
name);
}
-
-#if defined(ENABLE_READLINE)
-# include <readline/history.h>
-# include <readline/readline.h>
-#elif defined(ENABLE_EDITLINE)
-# include <histedit.h>
-#endif
-
static char *get_prompt(void)
{
static char prompt[FILENAME_MAX + 2 /*"> "*/ + 1 /*"\0"*/ ];
@@ -222,52 +217,47 @@ static char *get_prompt(void)
return prompt;
}
-#if defined(ENABLE_READLINE)
-static char *fetchline(void)
+static void readline_printf_func(void *opaque, const char *fmt, ...)
{
- char *line = readline(get_prompt());
- if (line && *line) {
- add_history(line);
- }
- return line;
+ va_list ap;
+ va_start(ap, fmt);
+ vprintf(fmt, ap);
+ va_end(ap);
}
-#elif defined(ENABLE_EDITLINE)
-static char *el_get_prompt(EditLine *e)
+
+static void readline_flush_func(void *opaque)
{
- return get_prompt();
+ fflush(stdout);
}
-static char *fetchline(void)
+static void readline_func(void *opaque, const char *str, void *readline_opaque)
{
- static EditLine *el;
- static History *hist;
- HistEvent hevent;
- char *line;
- int count;
-
- if (!el) {
- hist = history_init();
- history(hist, &hevent, H_SETSIZE, 100);
- el = el_init(progname, stdin, stdout, stderr);
- el_source(el, NULL);
- el_set(el, EL_SIGNAL, 1);
- el_set(el, EL_PROMPT, el_get_prompt);
- el_set(el, EL_HIST, history, (const char *)hist);
- }
- line = strdup(el_gets(el, &count));
- if (line) {
- if (count > 0) {
- line[count-1] = '\0';
- }
- if (*line) {
- history(hist, &hevent, H_ENTER, line);
+ char **line = readline_opaque;
+ *line = g_strdup(str);
+}
+
+static void readline_completion_func(void *opaque, const char *str)
+{
+ /* No command or argument completion implemented yet */
+}
+
+static char *fetchline_readline(void)
+{
+ char *line = NULL;
+
+ readline_start(readline_state, get_prompt(), 0, readline_func, &line);
+ while (!line) {
+ int ch = getchar();
+ if (ch == EOF) {
+ break;
}
+ readline_handle_byte(readline_state, ch);
}
return line;
}
-#else
-# define MAXREADLINESZ 1024
-static char *fetchline(void)
+
+#define MAXREADLINESZ 1024
+static char *fetchline_fgets(void)
{
char *p, *line = g_malloc(MAXREADLINESZ);
@@ -283,7 +273,15 @@ static char *fetchline(void)
return line;
}
-#endif
+
+static char *fetchline(void)
+{
+ if (readline_state) {
+ return fetchline_readline();
+ } else {
+ return fetchline_fgets();
+ }
+}
static void prep_fetchline(void *opaque)
{
@@ -339,6 +337,11 @@ static void add_user_command(char *optarg)
cmdline[ncmdline-1] = optarg;
}
+static void reenable_tty_echo(void)
+{
+ qemu_set_tty_echo(STDIN_FILENO, true);
+}
+
int main(int argc, char **argv)
{
int readonly = 0;
@@ -435,6 +438,15 @@ int main(int argc, char **argv)
qemuio_add_command(&open_cmd);
qemuio_add_command(&close_cmd);
+ if (isatty(STDIN_FILENO)) {
+ readline_state = readline_init(readline_printf_func,
+ readline_flush_func,
+ NULL,
+ readline_completion_func);
+ qemu_set_tty_echo(STDIN_FILENO, false);
+ atexit(reenable_tty_echo);
+ }
+
/* open the device */
if (!readonly) {
flags |= BDRV_O_RDWR;
@@ -453,5 +465,6 @@ int main(int argc, char **argv)
if (qemuio_bs) {
bdrv_unref(qemuio_bs);
}
+ g_free(readline_state);
return 0;
}