term_columns() checks for terminal width via ioctl(2). After
redirecting, stdin is no longer terminal to get terminal width.
Check terminal width and save it before redirect stdin in
setup_pager() and let term_columns() reuse the value.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>
---
Makefile | 1 +
column.h | 6 ++++++
help.c | 23 +----------------------
pager.c | 35 +++++++++++++++++++++++++++++++++++
4 files changed, 43 insertions(+), 22 deletions(-)
create mode 100644 column.h
diff --git a/Makefile b/Makefile
index c457c34..cbbc699 100644
--- a/Makefile
+++ b/Makefile
@@ -2114,6 +2114,7 @@ builtin/prune.o builtin/reflog.o reachable.o: reachable.h
builtin/commit.o builtin/revert.o wt-status.o: wt-status.h
builtin/tar-tree.o archive-tar.o: tar.h
connect.o transport.o url.o http-backend.o: url.h
+help.o pager.o: column.h
http-fetch.o http-walker.o remote-curl.o transport.o walker.o: walker.h
http.o http-walker.o http-push.o http-fetch.o remote-curl.o: http.h url.h
diff --git a/column.h b/column.h
new file mode 100644
index 0000000..55d8067
--- /dev/null
+++ b/column.h
@@ -0,0 +1,6 @@
+#ifndef COLUMN_H
+#define COLUMN_H
+
+extern int term_columns(void);
+
+#endif
diff --git a/help.c b/help.c
index cbbe966..672561b 100644
--- a/help.c
+++ b/help.c
@@ -4,28 +4,7 @@
#include "levenshtein.h"
#include "help.h"
#include "common-cmds.h"
-
-/* most GUI terminals set COLUMNS (although some don't export it) */
-static int term_columns(void)
-{
- char *col_string = getenv("COLUMNS");
- int n_cols;
-
- if (col_string && (n_cols = atoi(col_string)) > 0)
- return n_cols;
-
-#ifdef TIOCGWINSZ
- {
- struct winsize ws;
- if (!ioctl(1, TIOCGWINSZ, &ws)) {
- if (ws.ws_col)
- return ws.ws_col;
- }
- }
-#endif
-
- return 80;
-}
+#include "column.h"
void add_cmdname(struct cmdnames *cmds, const char *name, int len)
{
diff --git a/pager.c b/pager.c
index 975955b..772a5a6 100644
--- a/pager.c
+++ b/pager.c
@@ -6,6 +6,21 @@
#define DEFAULT_PAGER "less"
#endif
+static int spawned_pager;
+static int max_columns;
+
+static int retrieve_terminal_width(void)
+{
+#ifdef TIOCGWINSZ
+ struct winsize ws;
+ if (ioctl(1, TIOCGWINSZ, &ws)) /* e.g., ENOSYS */
+ return 0;
+ return ws.ws_col;
+#else
+ return 0;
+#endif
+}
+
/*
* This is split up from the rest of git so that we can do
* something different on Windows.
@@ -72,12 +87,17 @@ const char *git_pager(int stdout_is_tty)
void setup_pager(void)
{
const char *pager = git_pager(isatty(1));
+ int width;
if (!pager)
return;
setenv("GIT_PAGER_IN_USE", "true", 1);
+ width = retrieve_terminal_width();
+ if (width)
+ max_columns = width;
+
/* spawn the pager */
pager_argv[0] = pager;
pager_process.use_shell = 1;
@@ -110,3 +130,18 @@ int pager_in_use(void)
env = getenv("GIT_PAGER_IN_USE");
return env ? git_config_bool("GIT_PAGER_IN_USE", env) : 0;
}
+
+int term_columns()
+{
+ char *col_string = getenv("COLUMNS");
+ int n_cols;
+
+ if (col_string && (n_cols = atoi(col_string)) > 0)
+ return n_cols;
+
+ if (spawned_pager && max_columns)
+ return max_columns;
+
+ n_cols = retrieve_terminal_width();
+ return n_cols ? n_cols : 80;
+}
--
1.7.8.36.g69ee2
--
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