[PATCH] top: provide cmdline argument '-H' to enable thread scanning by default

Thomas De Schampheleire patrickdepinguin at gmail.com
Tue Mar 26 12:10:21 UTC 2019


From: Thomas De Schampheleire <thomas.de_schampheleire at nokia.com>

In particular useful when you want to evaluate the threads in batch mode:
    top -Hbn1

Signed-off-by: Philippe Belet <philippe.belet at nokia.com>
Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire at nokia.com>
---
 procps/top.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/procps/top.c b/procps/top.c
index 625409755..59b0adf04 100644
--- a/procps/top.c
+++ b/procps/top.c
@@ -223,7 +223,8 @@ enum {
 	OPT_n = (1 << 1),
 	OPT_b = (1 << 2),
 	OPT_m = (1 << 3),
-	OPT_EOF = (1 << 4), /* pseudo: "we saw EOF in stdin" */
+	OPT_H = (1 << 4),
+	OPT_EOF = (1 << 5), /* pseudo: "we saw EOF in stdin" */
 };
 #define OPT_BATCH_MODE (option_mask32 & OPT_b)
 
@@ -1076,6 +1077,9 @@ static unsigned handle_input(unsigned scan_mask, duration_t interval)
 //usage:	IF_FEATURE_TOPMEM(
 //usage:   "\n""	-m	Same as 's' key"
 //usage:	)
+//usage:	IF_FEATURE_SHOW_THREADS(
+//usage:   "\n""	-H	Show threads"
+//usage:	)
 
 /* Interactive testing:
  * echo sss | ./busybox top
@@ -1110,7 +1114,7 @@ int top_main(int argc UNUSED_PARAM, char **argv)
 
 	/* all args are options; -n NUM */
 	make_all_argv_opts(argv); /* options can be specified w/o dash */
-	col = getopt32(argv, "d:n:b"IF_FEATURE_TOPMEM("m"), &str_interval, &str_iterations);
+	col = getopt32(argv, "d:n:b"IF_FEATURE_TOPMEM("m")"H", &str_interval, &str_iterations);
 #if ENABLE_FEATURE_TOPMEM
 	if (col & OPT_m) /* -m (busybox specific) */
 		scan_mask = TOPMEM_MASK;
@@ -1129,6 +1133,11 @@ int top_main(int argc UNUSED_PARAM, char **argv)
 			str_iterations++;
 		iterations = xatou(str_iterations);
 	}
+#if ENABLE_FEATURE_SHOW_THREADS
+	if (col & OPT_H) {
+		scan_mask |= PSSCAN_TASKS;
+	}
+#endif
 
 	/* change to /proc */
 	xchdir("/proc");
-- 
2.19.2



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