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204 lines
6.9 KiB
C
204 lines
6.9 KiB
C
diff --git a/src/core/nginx.c b/src/core/nginx.c
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index 60f8fe7..4bd244b 100644
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--- a/src/core/nginx.c
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+++ b/src/core/nginx.c
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@@ -981,6 +981,7 @@ ngx_core_module_create_conf(ngx_cycle_t *cycle)
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ccf->daemon = NGX_CONF_UNSET;
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ccf->master = NGX_CONF_UNSET;
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+ ccf->privileged_agent = NGX_CONF_UNSET;
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ccf->timer_resolution = NGX_CONF_UNSET_MSEC;
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ccf->worker_processes = NGX_CONF_UNSET;
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@@ -1009,6 +1010,7 @@ ngx_core_module_init_conf(ngx_cycle_t *cycle, void *conf)
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ngx_conf_init_value(ccf->daemon, 1);
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ngx_conf_init_value(ccf->master, 1);
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+ ngx_conf_init_value(ccf->privileged_agent, 0);
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ngx_conf_init_msec_value(ccf->timer_resolution, 0);
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ngx_conf_init_value(ccf->worker_processes, 1);
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diff --git a/src/core/ngx_cycle.h b/src/core/ngx_cycle.h
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index c51b7ff..3261f90 100644
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--- a/src/core/ngx_cycle.h
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+++ b/src/core/ngx_cycle.h
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@@ -22,6 +22,9 @@
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#define NGX_DEBUG_POINTS_ABORT 2
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+#define HAVE_PRIVILEGED_PROCESS_PATCH 1
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+
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+
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typedef struct ngx_shm_zone_s ngx_shm_zone_t;
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typedef ngx_int_t (*ngx_shm_zone_init_pt) (ngx_shm_zone_t *zone, void *data);
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@@ -81,6 +84,7 @@ struct ngx_cycle_s {
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typedef struct {
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ngx_flag_t daemon;
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ngx_flag_t master;
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+ ngx_flag_t privileged_agent;
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ngx_msec_t timer_resolution;
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diff --git a/src/os/unix/ngx_process_cycle.c b/src/os/unix/ngx_process_cycle.c
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index 7cee1c5..c4f70d6 100644
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--- a/src/os/unix/ngx_process_cycle.c
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+++ b/src/os/unix/ngx_process_cycle.c
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@@ -15,6 +15,8 @@ static void ngx_start_worker_processes(ngx_cycle_t *cycle, ngx_int_t n,
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ngx_int_t type);
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static void ngx_start_cache_manager_processes(ngx_cycle_t *cycle,
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ngx_uint_t respawn);
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+static void ngx_start_privileged_agent_processes(ngx_cycle_t *cycle,
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+ ngx_uint_t respawn);
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static void ngx_pass_open_channel(ngx_cycle_t *cycle);
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static void ngx_signal_worker_processes(ngx_cycle_t *cycle, int signo);
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static ngx_uint_t ngx_reap_children(ngx_cycle_t *cycle);
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@@ -24,6 +26,7 @@ static void ngx_worker_process_init(ngx_cycle_t *cycle, ngx_int_t worker);
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static void ngx_worker_process_exit(ngx_cycle_t *cycle);
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static void ngx_channel_handler(ngx_event_t *ev);
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static void ngx_cache_manager_process_cycle(ngx_cycle_t *cycle, void *data);
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+static void ngx_privileged_agent_process_cycle(ngx_cycle_t *cycle, void *data);
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static void ngx_cache_manager_process_handler(ngx_event_t *ev);
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static void ngx_cache_loader_process_handler(ngx_event_t *ev);
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@@ -51,6 +54,8 @@ sig_atomic_t ngx_noaccept;
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ngx_uint_t ngx_noaccepting;
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ngx_uint_t ngx_restart;
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+ngx_uint_t ngx_is_privileged_agent;
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+
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static u_char master_process[] = "master process";
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@@ -130,6 +135,7 @@ ngx_master_process_cycle(ngx_cycle_t *cycle)
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ngx_start_worker_processes(cycle, ccf->worker_processes,
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NGX_PROCESS_RESPAWN);
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ngx_start_cache_manager_processes(cycle, 0);
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+ ngx_start_privileged_agent_processes(cycle, 0);
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ngx_new_binary = 0;
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delay = 0;
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@@ -215,6 +221,7 @@ ngx_master_process_cycle(ngx_cycle_t *cycle)
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ngx_start_worker_processes(cycle, ccf->worker_processes,
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NGX_PROCESS_RESPAWN);
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ngx_start_cache_manager_processes(cycle, 0);
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+ ngx_start_privileged_agent_processes(cycle, 0);
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ngx_noaccepting = 0;
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continue;
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@@ -234,6 +241,7 @@ ngx_master_process_cycle(ngx_cycle_t *cycle)
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ngx_start_worker_processes(cycle, ccf->worker_processes,
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NGX_PROCESS_JUST_RESPAWN);
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ngx_start_cache_manager_processes(cycle, 1);
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+ ngx_start_privileged_agent_processes(cycle, 1);
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/* allow new processes to start */
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ngx_msleep(100);
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@@ -248,6 +256,7 @@ ngx_master_process_cycle(ngx_cycle_t *cycle)
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ngx_start_worker_processes(cycle, ccf->worker_processes,
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NGX_PROCESS_RESPAWN);
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ngx_start_cache_manager_processes(cycle, 0);
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+ ngx_start_privileged_agent_processes(cycle, 0);
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live = 1;
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}
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@@ -393,6 +431,26 @@ ngx_start_cache_manager_processes(ngx_cycle_t *cycle, ngx_uint_t respawn)
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static void
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+ngx_start_privileged_agent_processes(ngx_cycle_t *cycle, ngx_uint_t respawn)
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+{
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+ ngx_core_conf_t *ccf;
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+
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+ ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx,
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+ ngx_core_module);
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+
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+ if (!ccf->privileged_agent) {
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+ return;
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+ }
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+
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+ ngx_spawn_process(cycle, ngx_privileged_agent_process_cycle,
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+ "privileged agent process", "privileged agent process",
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+ respawn ? NGX_PROCESS_JUST_RESPAWN : NGX_PROCESS_RESPAWN);
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+
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+ ngx_pass_open_channel(cycle);
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+}
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+
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+
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+static void
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ngx_pass_open_channel(ngx_cycle_t *cycle)
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{
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ngx_int_t i;
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@@ -794,7 +860,10 @@ ngx_worker_process_init(ngx_cycle_t *cycle, ngx_int_t worker)
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}
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}
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- if (geteuid() == 0) {
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+ /*
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+ * privileged agent process has the same permission as master process
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+ */
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+ if (!ngx_is_privileged_agent && geteuid() == 0) {
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if (setgid(ccf->group) == -1) {
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ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno,
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"setgid(%d) failed", ccf->group);
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@@ -1149,6 +1216,47 @@ ngx_cache_manager_process_cycle(ngx_cycle_t *cycle, void *data)
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static void
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+ngx_privileged_agent_process_cycle(ngx_cycle_t *cycle, void *data)
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+{
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+ char *name = data;
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+
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+ /*
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+ * Set correct process type since closing listening Unix domain socket
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+ * in a master process also removes the Unix domain socket file.
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+ */
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+ ngx_process = NGX_PROCESS_HELPER;
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+ ngx_is_privileged_agent = 1;
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+
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+ ngx_close_listening_sockets(cycle);
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+
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+ /* Set a moderate number of connections for a helper process. */
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+ cycle->connection_n = 512;
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+
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+ ngx_worker_process_init(cycle, -1);
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+
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+ ngx_use_accept_mutex = 0;
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+
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+ ngx_setproctitle(name);
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+
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+ for ( ;; ) {
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+
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+ if (ngx_terminate || ngx_quit) {
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+ ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "exiting");
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+ ngx_worker_process_exit(cycle);
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+ }
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+
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+ if (ngx_reopen) {
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+ ngx_reopen = 0;
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+ ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "reopening logs");
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+ ngx_reopen_files(cycle, -1);
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+ }
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+
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+ ngx_process_events_and_timers(cycle);
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+ }
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+}
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+
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+
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+static void
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ngx_cache_manager_process_handler(ngx_event_t *ev)
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{
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time_t next, n;
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diff --git a/src/os/unix/ngx_process_cycle.h b/src/os/unix/ngx_process_cycle.h
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index 69495d5..5149396 100644
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--- a/src/os/unix/ngx_process_cycle.h
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+++ b/src/os/unix/ngx_process_cycle.h
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@@ -45,6 +45,7 @@ extern ngx_pid_t ngx_new_binary;
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extern ngx_uint_t ngx_inherited;
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extern ngx_uint_t ngx_daemonized;
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extern ngx_uint_t ngx_exiting;
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+extern ngx_uint_t ngx_is_privileged_agent;
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extern sig_atomic_t ngx_reap;
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extern sig_atomic_t ngx_sigio;
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