[systemd-devel] [PATCH 2/4] util: add functions getting proc status, maps, limits, cgroup

[Jakub Filak]

---
 src/shared/util.c    | 13 +++++++++++++
 src/shared/util.h    |  4 ++++
 src/test/test-util.c | 17 +++++++++++++++++
 3 files changed, 34 insertions(+)

diff --git a/src/shared/util.c b/src/shared/util.c
index 0166052..d62d90c 100644
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -892,6 +892,19 @@ int get_process_root(pid_t pid, char **root) {
         return get_process_link_contents(p, root);
 }
 
+#define DEFINE_FN_GET_PROCESS_FULL_FILE(name) \
+int get_process_##name(pid_t pid, char **name) { \
+        const char *p; \
+        assert(pid >= 0); \
+        p = procfs_file_alloca(pid, #name); \
+        return read_full_file(p, name, /*size*/NULL); \
+}
+
+DEFINE_FN_GET_PROCESS_FULL_FILE(status)
+DEFINE_FN_GET_PROCESS_FULL_FILE(maps)
+DEFINE_FN_GET_PROCESS_FULL_FILE(limits)
+DEFINE_FN_GET_PROCESS_FULL_FILE(cgroup)
+
 char *strnappend(const char *s, const char *suffix, size_t b) {
         size_t a;
         char *r;
diff --git a/src/shared/util.h b/src/shared/util.h
index fc59481..2c9e4fe 100644
--- a/src/shared/util.h
+++ b/src/shared/util.h
@@ -297,6 +297,10 @@ int get_process_gid(pid_t pid, gid_t *gid);
 int get_process_capeff(pid_t pid, char **capeff);
 int get_process_cwd(pid_t pid, char **cwd);
 int get_process_root(pid_t pid, char **root);
+int get_process_status(pid_t pid, char **status);
+int get_process_maps(pid_t pid, char **maps);
+int get_process_limits(pid_t pid, char **limits);
+int get_process_cgroup(pid_t pid, char **cgroup);
 
 char hexchar(int x) _const_;
 int unhexchar(char c) _const_;
diff --git a/src/test/test-util.c b/src/test/test-util.c
index 7bf8ff6..f7c0210 100644
--- a/src/test/test-util.c
+++ b/src/test/test-util.c
@@ -491,6 +491,7 @@ static void test_u64log2(void) {
 static void test_get_process_comm(void) {
         struct stat st;
         _cleanup_free_ char *a = NULL, *c = NULL, *d = NULL, *f = NULL, *i = NULL, *cwd = NULL, *root = NULL;
+        _cleanup_free_ char *s = NULL, *l = NULL, *m = NULL, *cg = NULL;
         unsigned long long b;
         pid_t e;
         uid_t u;
@@ -543,6 +544,22 @@ static void test_get_process_comm(void) {
         assert_se(r >= 0 || r == -EACCES);
         log_info("pid1 root: '%s'", root);
 
+        r = get_process_status(me, &s);
+        assert_se(r >= 0 || r == -EACCES);
+        log_info("pid1 strlen(status): '%zd'", strlen(s));
+
+        r = get_process_maps(me, &m);
+        assert_se(r >= 0 || r == -EACCES);
+        log_info("pid1 strlen(maps): '%zd'", strlen(m));
+
+        r = get_process_limits(me, &l);
+        assert_se(r >= 0 || r == -EACCES);
+        log_info("pid1 strlen(limits): '%zd'", strlen(l));
+
+        r = get_process_cgroup(me, &cg);
+        assert_se(r >= 0 || r == -EACCES);
+        log_info("pid1 strlen(cgroup): '%zd'", strlen(cg));
+
         assert_se(get_ctty_devnr(1, &h) == -ENOENT);
 
         getenv_for_pid(1, "PATH", &i);
-- 
1.8.3.1