1 files changed, 95 insertions, 0 deletions
diff --git a/src/libsystem/proc.c b/src/libsystem/proc.c
new file mode 100644
index 0000000..acac082
--- /dev/null
+++ b/src/libsystem/proc.c
@@ -0,0 +1,95 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/*
+ * libsystem
+ *
+ * Copyright (c) 2016 Samsung Electronics Co., Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the License);
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <assert.h>
+
+#include "libsystem.h"
+
+/* In old kernel, this symbol maybe NOT */
+#ifndef TASK_COMM_LEN
+#define TASK_COMM_LEN 16
+#endif
+
+ssize_t cmdline_get_str(char **buf, const char *op) {
+        _cleanup_free_ char *cmdline = NULL;
+        char *s, *w, *state;
+        size_t l, ll;
+        int r;
+
+        assert(buf);
+        assert(op);
+
+        r = read_one_line_from_path("/proc/cmdline", &cmdline);
+        if (r < 0)
+                return r;
+
+        ll = strlen(op);
+        FOREACH_WORD(w, l, cmdline, state)
+                if (strneq(op, w, ll)) {
+                        s = new0(char, l - ll + 1);
+                        if (!s)
+                                return -ENOMEM;
+
+                        strncpy(s, w + ll, l - ll + 1);
+
+                        *buf = s;
+
+                        return l - ll + 1;
+                }
+
+        return -ENOENT;
+}
+
+int pid_of(const char *pname) {
+        _cleanup_closedir_ DIR *dir = NULL;
+        struct dirent *de;
+        int r;
+
+        dir = opendir("/proc");
+        if (!dir)
+                return -errno;
+
+        FOREACH_DIRENT(de, dir, return -errno) {
+                _cleanup_free_ char *path = NULL;
+                _cleanup_free_ char *comm = NULL;
+
+                if (de->d_type != DT_DIR)
+                        continue;
+
+                if (!is_number(de->d_name, strlen(de->d_name)))
+                        continue;
+
+                r = asprintf(&path, "/proc/%s/comm", de->d_name);
+                if (r < 0)
+                        return -ENOMEM;
+
+                r = read_one_line_from_path(path, &comm);
+                if (r < 0)
+                        continue;
+
+                if (strneq(pname, comm, TASK_COMM_LEN-1))
+                        return atoi(de->d_name);
+        }
+
+        return 0;
+}