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perf newt: Properly restore the screen when error exiting

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Show an OK message box with the last message sent via pr_err,
etc.

Reported-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1269274229-20442-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Arnaldo Carvalho de Melo 2010-03-22 13:10:25 -03:00 committed by Ingo Molnar
parent 301fde27c7
commit f3a1f0ea94
3 changed files with 17 additions and 10 deletions
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4
tools/perf/perf.c
View File

@ -264,11 +264,11 @@ static int run_builtin(struct cmd_struct *p, int argc, const char **argv)
set_debugfs_path();
status = p->fn(argc, argv, prefix);
exit_browser(status);
if (status)
return status & 0xff;
exit_browser();
/* Somebody closed stdout? */
if (fstat(fileno(stdout), &st))
return 0;

4
tools/perf/util/cache.h
View File

@ -77,10 +77,10 @@ static inline void setup_browser(void)
{
setup_pager();
}
static inline void exit_browser(void) {}
static inline void exit_browser(bool wait_for_ok __used) {}
#else
void setup_browser(void);
void exit_browser(void);
void exit_browser(bool wait_for_ok);
#endif
extern const char *editor_program;

19
tools/perf/util/newt.c
View File

@ -170,18 +170,20 @@ void perf_session__browse_hists(struct rb_root *hists, u64 session_total,
newtFormDestroy(form);
}
static char browser__last_msg[1024];
int browser__show_help(const char *format, va_list ap)
{
int ret;
static int backlog;
static char msg[1024];
ret = vsnprintf(msg + backlog, sizeof(msg) - backlog, format, ap);
ret = vsnprintf(browser__last_msg + backlog,
sizeof(browser__last_msg) - backlog, format, ap);
backlog += ret;
if (msg[backlog - 1] == '\n') {
if (browser__last_msg[backlog - 1] == '\n') {
newtPopHelpLine();
newtPushHelpLine(msg);
newtPushHelpLine(browser__last_msg);
newtRefresh();
backlog = 0;
}
@ -200,8 +202,13 @@ void setup_browser(void)
newtPushHelpLine(" ");
}
void exit_browser(void)
void exit_browser(bool wait_for_ok)
{
if (use_browser)
if (use_browser) {
if (wait_for_ok) {
char title[] = "Fatal Error", ok[] = "Ok";
newtWinMessage(title, ok, browser__last_msg);
}
newtFinished();
}
}