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logger,initctl: port to daemon reference implementation

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This commit is contained in:
Lennart Poettering
2010-05-16 01:45:52 +02:00
parent abbbea81a8
commit 8bfcc8ea65
3 changed files with 43 additions and 107 deletions
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Makefile.am
+6 -2
View File
@@ -207,11 +207,15 @@ test_loopback_LDADD = $(systemd_LDADD)
systemd_logger_SOURCES = \
$(BASIC_SOURCES) \
logger.c
logger.c \
sd-daemon.c \
sd-daemon.h
systemd_initctl_SOURCES = \
$(BASIC_SOURCES) \
initctl.c
initctl.c \
sd-daemon.c \
sd-daemon.h
systemd_initctl_CPPFLAGS = \
$(AM_CPPFLAGS) \
initctl.c
+16 -50
View File
@@ -40,8 +40,8 @@
#include "list.h"
#include "initreq.h"
#include "manager.h"
#include "sd-daemon.h"
#define SERVER_FD_START 3
#define SERVER_FD_MAX 16
#define TIMEOUT ((int) (10*MSEC_PER_SEC))
@@ -246,49 +246,6 @@ static void fifo_free(Fifo *f) {
free(f);
}
static int verify_environment(unsigned *n_sockets) {
unsigned long long pid;
const char *e;
int r;
unsigned ns;
assert_se(n_sockets);
if (!(e = getenv("LISTEN_PID"))) {
log_error("Missing $LISTEN_PID environment variable.");
return -ENOENT;
}
if ((r = safe_atollu(e, &pid)) < 0) {
log_error("Failed to parse $LISTEN_PID: %s", strerror(-r));
return r;
}
if (pid != (unsigned long long) getpid()) {
log_error("Socket nor for me.");
return -ENOENT;
}
if (!(e = getenv("LISTEN_FDS"))) {
log_error("Missing $LISTEN_FDS environment variable.");
return -ENOENT;
}
if ((r = safe_atou(e, &ns)) < 0) {
log_error("Failed to parse $LISTEN_FDS: %s", strerror(-r));
return -E2BIG;
}
if (ns <= 0 || ns > SERVER_FD_MAX) {
log_error("Wrong number of file descriptors passed: %s", e);
return -E2BIG;
}
*n_sockets = ns;
return 0;
}
static void server_done(Server *s) {
assert(s);
@@ -335,14 +292,14 @@ static int server_init(Server *s, unsigned n_sockets) {
zero(ev);
ev.events = EPOLLIN;
ev.data.ptr = f;
if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, SERVER_FD_START+i, &ev) < 0) {
if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, SD_LISTEN_FDS_START+i, &ev) < 0) {
r = -errno;
fifo_free(f);
log_error("Failed to add fifo fd to epoll object: %s", strerror(errno));
goto fail;
}
f->fd = SERVER_FD_START+i;
f->fd = SD_LISTEN_FDS_START+i;
LIST_PREPEND(Fifo, fifo, s->fifos, f);
f->server = s;
s->n_fifos ++;
@@ -386,15 +343,24 @@ static int process_event(Server *s, struct epoll_event *ev) {
int main(int argc, char *argv[]) {
Server server;
int r = 3;
unsigned n;
int r = 3, n;
log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
log_parse_environment();
log_info("systemd-initctl running as pid %llu", (unsigned long long) getpid());
if (verify_environment(&n) < 0)
if ((n = sd_listen_fds(true)) < 0) {
log_error("Failed to read listening file descriptors from environment: %s", strerror(-r));
return 1;
}
if (server_init(&server, n) < 0)
if (n <= 0 || n > SERVER_FD_MAX) {
log_error("No or too many file descriptors passed.");
return 2;
}
if (server_init(&server, (unsigned) n) < 0)
return 2;
for (;;) {
logger.c
+21 -55
View File
@@ -35,10 +35,10 @@
#include "util.h"
#include "log.h"
#include "list.h"
#include "sd-daemon.h"
#define STREAM_BUFFER 2048
#define STREAMS_MAX 256
#define SERVER_FD_START 3
#define SERVER_FD_MAX 16
#define TIMEOUT ((int) (10*MSEC_PER_SEC))
@@ -348,49 +348,6 @@ fail:
return r;
}
static int verify_environment(unsigned *n_sockets) {
unsigned long long pid;
const char *e;
int r;
unsigned ns;
assert_se(n_sockets);
if (!(e = getenv("LISTEN_PID"))) {
log_error("Missing $LISTEN_PID environment variable.");
return -ENOENT;
}
if ((r = safe_atollu(e, &pid)) < 0) {
log_error("Failed to parse $LISTEN_PID: %s", strerror(-r));
return r;
}
if (pid != (unsigned long long) getpid()) {
log_error("Socket nor for me.");
return -ENOENT;
}
if (!(e = getenv("LISTEN_FDS"))) {
log_error("Missing $LISTEN_FDS environment variable.");
return -ENOENT;
}
if ((r = safe_atou(e, &ns)) < 0) {
log_error("Failed to parse $LISTEN_FDS: %s", strerror(-r));
return -E2BIG;
}
if (ns <= 0 || ns > SERVER_FD_MAX) {
log_error("Wrong number of file descriptors passed: %s", e);
return -E2BIG;
}
*n_sockets = ns;
return 0;
}
static void server_done(Server *s) {
unsigned i;
assert(s);
@@ -399,7 +356,7 @@ static void server_done(Server *s) {
stream_free(s->streams);
for (i = 0; i < s->n_server_fd; i++)
close_nointr_nofail(SERVER_FD_START+i);
close_nointr_nofail(SD_LISTEN_FDS_START+i);
if (s->syslog_fd >= 0)
close_nointr_nofail(s->syslog_fd);
@@ -439,8 +396,8 @@ static int server_init(Server *s, unsigned n_sockets) {
zero(ev);
ev.events = EPOLLIN;
ev.data.ptr = UINT_TO_PTR(SERVER_FD_START+i);
if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, SERVER_FD_START+i, &ev) < 0) {
ev.data.ptr = UINT_TO_PTR(SD_LISTEN_FDS_START+i);
if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, SD_LISTEN_FDS_START+i, &ev) < 0) {
r = -errno;
log_error("Failed to add server fd to epoll object: %s", strerror(errno));
goto fail;
@@ -480,13 +437,13 @@ static int process_event(Server *s, struct epoll_event *ev) {
assert(s);
/* Yes, this is a bit ugly, we assume that that valid pointers
* are > SERVER_FD_START+SERVER_FD_MAX. Which is certainly
* are > SD_LISTEN_FDS_START+SERVER_FD_MAX. Which is certainly
* true on Linux (and probably most other OSes, too, since the
* first 4k usually are part of a seperate null pointer
* dereference page. */
if (PTR_TO_UINT(ev->data.ptr) >= SERVER_FD_START &&
PTR_TO_UINT(ev->data.ptr) < SERVER_FD_START+s->n_server_fd) {
if (PTR_TO_UINT(ev->data.ptr) >= SD_LISTEN_FDS_START &&
PTR_TO_UINT(ev->data.ptr) < SD_LISTEN_FDS_START+s->n_server_fd) {
if (ev->events != EPOLLIN) {
log_info("Got invalid event from epoll. (1)");
@@ -505,7 +462,7 @@ static int process_event(Server *s, struct epoll_event *ev) {
timestamp = now(CLOCK_REALTIME);
if (!(ev->events & EPOLLIN)) {
log_info("Got invalid event from epoll. (3)");
log_info("Got invalid event from epoll. (2)");
stream_free(stream);
return 0;
}
@@ -525,16 +482,25 @@ static int process_event(Server *s, struct epoll_event *ev) {
int main(int argc, char *argv[]) {
Server server;
int r = 3;
unsigned n;
int r = 3, n;
log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
log_parse_environment();
log_info("systemd-logger running as pid %llu", (unsigned long long) getpid());
if (verify_environment(&n) < 0)
if ((n = sd_listen_fds(true)) < 0) {
log_error("Failed to read listening file descriptors from environment: %s", strerror(-r));
return 1;
}
if (server_init(&server, n) < 0)
if (n <= 0 || n > SERVER_FD_MAX) {
log_error("No or too many file descriptors passed.");
return 2;
}
if (server_init(&server, (unsigned) n) < 0)
return 3;
for (;;) {
struct epoll_event event;