Add option --name for naming the process

[src/app-framework-binder.git] / src / process-name.c

diff --git a/src/process-name.c b/src/process-name.c
new file mode 100644 (file)
index 0000000..e8e19ee
--- /dev/null
+++ b/src/process-name.c
@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2015, 2016, 2017 "IoT.bzh"
+ *
+ * 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 <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <sys/prctl.h>
+
+#include "process-name.h"
+
+int process_name_set_name(const char *name)
+{
+       return prctl(PR_SET_NAME, name);
+}
+
+int process_name_replace_cmdline(char **argv, const char *name)
+{
+       char *beg, *end, **av, c;
+       size_t length;
+
+       /* update the command line */
+       av = argv;
+       if (!av) {
+               errno = EINVAL;
+               return -1; /* no command line update required */
+       }
+
+       /* longest prefix */
+       end = beg = *av;
+       while (*av)
+               if (*av++ == end)
+                       while(*end++)
+                               ;
+       if (end == beg) {
+               errno = EINVAL;
+               return -1; /* nothing to change */
+       }
+
+       /* patch the command line */
+       av = &argv[1];
+       end--;
+       while (beg != end && (c = *name++)) {
+               if (c != ' ' || !*av)
+                       *beg++ = c;
+               else {
+                       *beg++ = 0;
+                       *av++ = beg;
+               }
+       }
+       /* terminate last arg */
+       if (beg != end)
+               *beg++ = 0;
+       /* update remaining args (for keeping initial length correct) */
+       while (*av)
+               *av++ = beg;
+       /* fulfill last arg with spaces */
+       while (beg != end)
+               *beg++ = ' ';
+       *beg = 0;
+
+       return 0;
+}
+