1 files changed, 112 insertions, 0 deletions
diff --git a/debian/patches/upstream/0006-lib-procfs-add-function-to-parse-proc-stat.patch b/debian/patches/upstream/0006-lib-procfs-add-function-to-parse-proc-stat.patch
new file mode 100644
index 0000000..54ca955
--- /dev/null
+++ b/debian/patches/upstream/0006-lib-procfs-add-function-to-parse-proc-stat.patch
@@ -0,0 +1,112 @@
+From: Karel Zak <kzak@redhat.com>
+Date: Thu, 11 Aug 2022 10:56:02 +0200
+Subject: [PATCH 06/24] lib/procfs: add function to parse /proc/#/stat
+
+Signed-off-by: Karel Zak <kzak@redhat.com>
+---
+ include/procfs.h |  1 +
+ lib/procfs.c     | 58 +++++++++++++++++++++++++++++++++++++++++++++++++++++++-
+ 2 files changed, 58 insertions(+), 1 deletion(-)
+
+diff --git a/include/procfs.h b/include/procfs.h
+index 5a730c9..825689b 100644
+--- a/include/procfs.h
++++ b/include/procfs.h
+@@ -30,6 +30,7 @@ extern ssize_t procfs_process_get_cmdline(struct path_cxt *pc, char *buf, size_t
+ extern ssize_t procfs_process_get_cmdname(struct path_cxt *pc, char *buf, size_t bufsz);
+ extern ssize_t procfs_process_get_stat(struct path_cxt *pc, char *buf, size_t bufsz);
+ 
++extern int procfs_process_get_stat_nth(struct path_cxt *pc, int n, uintmax_t *re);
+ 
+ static inline ssize_t procfs_process_get_exe(struct path_cxt *pc, char *buf, size_t bufsz)
+ {
+diff --git a/lib/procfs.c b/lib/procfs.c
+index 4d6d25b..16a8c04 100644
+--- a/lib/procfs.c
++++ b/lib/procfs.c
+@@ -166,6 +166,35 @@ ssize_t procfs_process_get_stat(struct path_cxt *pc, char *buf, size_t bufsz)
+ 	return procfs_process_get_line_for(pc, buf, bufsz, "stat");
+ }
+ 
++int procfs_process_get_stat_nth(struct path_cxt *pc, int n, uintmax_t *re)
++{
++	ssize_t rc;
++	char *key = NULL, *tok, *p;
++	char buf[BUFSIZ];
++	int i;
++
++	if (n == 2 || n == 3)		/* process name and status (strings) */
++		return -EINVAL;
++
++	rc = procfs_process_get_line_for(pc, buf, sizeof(buf), "stat");
++	if (rc < 0)
++		return rc;
++
++	for (i = 0, tok = strtok_r(buf, " ", &key); tok;
++	     tok = strtok_r(NULL, " ", &key)) {
++
++		i++;
++		if (i == n)
++			return ul_strtou64(tok, re, 10);
++
++		/* skip rest of the process name */
++		if (i == 2 && (p = strchr(key, ')')))
++			key = p + 2;
++	}
++
++	return -EINVAL;
++}
++
+ int procfs_process_get_uid(struct path_cxt *pc, uid_t *uid)
+ {
+ 	struct stat sb;
+@@ -536,6 +565,30 @@ static int test_isprocfs(int argc, char *argv[])
+ 	return is ? EXIT_SUCCESS : EXIT_FAILURE;
+ }
+ 
++static int test_process_stat_nth(int argc, char *argv[])
++{
++	pid_t pid;
++	struct path_cxt *pc;
++	uintmax_t num = 0;
++	int n;
++
++	if (argc != 3)
++		return EXIT_FAILURE;
++	pid = strtol(argv[1], (char **) NULL, 10);
++	n = strtol(argv[2], (char **) NULL, 10);
++
++	pc = ul_new_procfs_path(pid, NULL);
++	if (!pc)
++		err(EXIT_FAILURE, "cannot alloc procfs handler");
++
++	if (procfs_process_get_stat_nth(pc, n, &num) != 0)
++		err(EXIT_FAILURE, "read %dth number failed", n);
++
++	printf("%d: %dth %ju\n", (int) pid, n, num);
++	ul_unref_path(pc);
++	return EXIT_SUCCESS;
++}
++
+ int main(int argc, char *argv[])
+ {
+ 	if (argc < 2) {
+@@ -543,7 +596,8 @@ int main(int argc, char *argv[])
+ 				"       %1$s --fds <pid>\n"
+ 				"       %1$s --is-procfs [<dir>]\n"
+ 				"       %1$s --processes [---name <name>] [--uid <uid>]\n"
+-				"       %1$s --one <pid>\n",
++				"       %1$s --one <pid>\n"
++				"       %1$s --stat-nth <pid> <n>\n",
+ 				program_invocation_short_name);
+ 		return EXIT_FAILURE;
+ 	}
+@@ -558,6 +612,8 @@ int main(int argc, char *argv[])
+ 		return test_isprocfs(argc - 1, argv + 1);
+ 	if (strcmp(argv[1], "--one") == 0)
+ 		return test_one_process(argc - 1, argv + 1);
++	if (strcmp(argv[1], "--stat-nth") == 0)
++		return test_process_stat_nth(argc - 1, argv + 1);
+ 
+ 	return EXIT_FAILURE;
+ }