use ustream for process message logging

diff --git a/main.c b/main.c
index 2fef776..5bfd87a 100644 (file)
--- a/main.c
+++ b/main.c
@@ -57,12 +57,8 @@ netifd_delete_process(struct netifd_process *proc)
        if (proc->uloop.pending)
                uloop_process_delete(&proc->uloop);
        list_del(&proc->list);
-       uloop_fd_delete(&proc->log_uloop);
-       close(proc->log_uloop.fd);
-       if (proc->log_buf) {
-               free(proc->log_buf);
-               proc->log_buf = NULL;
-       }
+       ustream_free(&proc->log.stream);
+       close(proc->log.fd.fd);
 }
 
 void
@@ -82,76 +78,48 @@ netifd_log_message(int priority, const char *format, ...)
 }
 
 static void
-netifd_process_log_cb(struct uloop_fd *fd, unsigned int events)
+netifd_process_log_read_cb(struct ustream *s, int bytes)
 {
        struct netifd_process *proc;
        const char *log_prefix;
-       char *buf, *cur;
-       int maxlen, len, read_len;
-
-       proc = container_of(fd, struct netifd_process, log_uloop);
-
-       if (!proc->log_buf)
-               proc->log_buf = malloc(LOG_BUF_SIZE + 1);
+       char *data;
+       int len = 0;
 
+       proc = container_of(s, struct netifd_process, log);
        log_prefix = proc->log_prefix;
        if (!log_prefix)
                log_prefix = "process";
 
-retry:
-       buf = proc->log_buf + proc->log_buf_ofs;
-       maxlen = LOG_BUF_SIZE - proc->log_buf_ofs;
-       read_len = len = read(fd->fd, buf, maxlen);
-       if (len < 0) {
-               if (errno == EINTR)
-                       goto retry;
-
-               goto out;
-       } else if (len == 0)
-               goto out;
-
-       proc->log_buf_ofs += len;
-
-       len = proc->log_buf_ofs;
-       buf = proc->log_buf;
-       while (len > 0) {
-               cur = memchr(buf, '\n', len);
-               if (!cur)
+       do {
+               char *newline;
+
+               data = ustream_get_read_buf(s, &len);
+               if (!len)
                        break;
 
-               *cur = 0;
+               newline = strchr(data, '\n');
 
-               if (!proc->log_overflow)
+               if (proc->log_overflow) {
+                       if (newline) {
+                               len = newline + 1 - data;
+                               proc->log_overflow = false;
+                       }
+               } else if (newline) {
+                       *newline = 0;
+                       len = newline + 1 - data;
                        netifd_log_message(L_NOTICE, "%s (%d): %s\n",
-                               log_prefix, proc->uloop.pid, buf);
-               else
-                       proc->log_overflow = false;
-
-               cur++;
-               len -= cur - buf;
-               buf = cur;
-       }
-
-       if (buf > proc->log_buf && len > 0)
-               memmove(proc->log_buf, buf, len);
-
-       if (len == LOG_BUF_SIZE) {
-               if (!proc->log_overflow) {
-                       proc->log_buf[LOG_BUF_SIZE] = 0;
+                               log_prefix, proc->uloop.pid, data);
+               } else if (len == s->r.buffer_len) {
                        netifd_log_message(L_NOTICE, "%s (%d): %s [...]\n",
-                               log_prefix, proc->uloop.pid, proc->log_buf);
+                               log_prefix, proc->uloop.pid, data);
                        proc->log_overflow = true;
                }
-               len = 0;
-       }
-       proc->log_buf_ofs = len;
-
-       if (read_len > 0)
-               goto retry;
+               ustream_consume(s, len);
+       } while (1);
+}
 
-out:
-       if (fd->eof)
-               uloop_fd_delete(fd);
+static void netifd_process_log_state_cb(struct ustream *s)
+{
 }
 
 static void
@@ -159,7 +127,8 @@ netifd_process_cb(struct uloop_process *proc, int ret)
 {
        struct netifd_process *np;
        np = container_of(proc, struct netifd_process, uloop);
-       netifd_process_log_cb(&np->log_uloop, 0);
+
+       while (ustream_poll(&np->log.stream));
        netifd_delete_process(np);
        return np->cb(np, ret);
 }
@@ -209,10 +178,10 @@ netifd_start_process(const char **argv, char **env, struct netifd_process *proc)
        list_add_tail(&proc->list, &process_list);
 
        system_fd_set_cloexec(pfds[0]);
-       proc->log_buf_ofs = 0;
-       proc->log_uloop.fd = pfds[0];
-       proc->log_uloop.cb = netifd_process_log_cb;
-       uloop_fd_add(&proc->log_uloop, ULOOP_EDGE_TRIGGER | ULOOP_READ);
+       proc->log.stream.string_data = true;
+       proc->log.stream.notify_read = netifd_process_log_read_cb;
+       proc->log.stream.notify_state = netifd_process_log_state_cb;
+       ustream_fd_init(&proc->log, pfds[0]);
 
        return 0;
 

diff --git a/netifd.h b/netifd.h
index ac0c0f2..aa955ef 100644 (file)
--- a/netifd.h
+++ b/netifd.h
@@ -21,6 +21,7 @@
 #include <stdio.h>
 
 #include <libubox/uloop.h>
+#include <libubox/ustream.h>
 
 #include <libubus.h>
 
@@ -77,10 +78,8 @@ struct netifd_process {
        void (*cb)(struct netifd_process *, int ret);
        int dir_fd;
 
-       struct uloop_fd log_uloop;
+       struct ustream_fd log;
        const char *log_prefix;
-       char *log_buf;
-       int log_buf_ofs;
        bool log_overflow;
 };