[PATCH 22/33] Dump the task

Janani Venkataraman
2014-03-20T09:42:13Z

Now we have the PID and the absolute or relative path of the core. We now call
the do_coredump function with the appropriate parameters.

Signed-off-by: Janani Venkataraman <jananive@linux.vnet.ibm.com>
---
src/coredump.c | 60 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 60 insertions(+)

diff --git a/src/coredump.c b/src/coredump.c
index 599a912..72ba8d8 100755
--- a/src/coredump.c
+++ b/src/coredump.c
@@ -446,6 +446,61 @@ int get_client_pid(struct ucred *client_info)
return 0;
}

+/* Dumps the client process */
+int dump_task(struct ucred *client_info, char *core_file)
+{
+
+ char filename[40], cwd[CORE_FILE_NAME_SZ], corefile[CORE_FILE_NAME_SZ];
+ memset(filename, 0, 40);
+ memset(cwd, 0, CORE_FILE_NAME_SZ);
+ memset(corefile, 0, CORE_FILE_NAME_SZ);
+
+ if (setgid(client_info->gid)) {
+ send_reply(errno);
+ gencore_log("[%d]: Could not change GID:%s\n",
+ pid_log, strerror(errno));
+ return -1;
+ }
+
+ if (setuid(client_info->uid)) {
+ send_reply(errno);
+ gencore_log("[%d]: Could not change UID:%s\n",
+ pid_log, strerror(errno));
+ return -1;
+ }
+
+ /* Checking if UID was changed */
+ if (geteuid() != client_info->uid) {
+ send_reply(errno);
+ gencore_log("[%d]: Could not change UID:%s\n",
+ pid_log, strerror(errno));
+ return -1;
+ }
+
+ /* Converting the path to absolute path */
+ if (core_file[0] != '/') {
+ snprintf(filename, 40, "/proc/%d/cwd", client_info->pid);
+ readlink(filename, cwd, CORE_FILE_NAME_SZ);
+ snprintf(corefile, CORE_FILE_NAME_SZ, "%s/%s", cwd, core_file);
+ } else
+ strcpy(corefile, core_file);
+
+ if (do_coredump(client_info->pid, (char *)corefile)) {
+ send_reply(errno);
+ gencore_log("[%d]: Could not create core file %s.\n",
+ pid_log, corefile);
+ fflush(fp_log);
+ return -1;
+ }
+
+ gencore_log("[%d]: Core file %s created.\n", pid_log,
+ corefile);
+
+ send_reply(0);
+
+ return 0;
+}
+
/* Services requests */
int service_request(void)
{
@@ -463,6 +518,11 @@ int service_request(void)
if (ret)
goto cleanup;

+ /* Dump process */
+ ret = dump_task(&client_info, core_file);
+ if (ret)
+ goto cleanup;
+
cleanup:
close(new_sock);
if (ret == -1)