file: use blob_buf_free()

[project/rpcd.git] / file.c

diff --git a/file.c b/file.c
index b1cfe99..9a3dfd8 100644 (file)
--- a/file.c
+++ b/file.c
@@ -1,7 +1,7 @@
 /*
  * rpcd - UBUS RPC server
  *
- *   Copyright (C) 2013 Jo-Philipp Wich <jow@openwrt.org>
+ *   Copyright (C) 2013-2014 Jo-Philipp Wich <jow@openwrt.org>
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -29,7 +29,7 @@
 #include <libubox/blobmsg.h>
 #include <libubox/ustream.h>
 
-#include "plugin.h"
+#include <rpcd/plugin.h>
 
 /* limit of sys & proc files */
 #define RPC_FILE_MIN_SIZE              (128)
@@ -69,14 +69,23 @@ struct rpc_file_exec_context {
 static struct blob_buf buf;
 
 enum {
-       RPC_F_PATH,
-       RPC_F_DATA,
-       __RPC_F_MAX,
+       RPC_F_R_PATH,
+       __RPC_F_R_MAX,
 };
 
-static const struct blobmsg_policy rpc_file_policy[__RPC_F_MAX] = {
-       [RPC_F_PATH] = { .name = "path", .type = BLOBMSG_TYPE_STRING },
-       [RPC_F_DATA] = { .name = "data", .type = BLOBMSG_TYPE_STRING },
+static const struct blobmsg_policy rpc_file_r_policy[__RPC_F_R_MAX] = {
+       [RPC_F_R_PATH] = { .name = "path", .type = BLOBMSG_TYPE_STRING },
+};
+
+enum {
+       RPC_F_RW_PATH,
+       RPC_F_RW_DATA,
+       __RPC_F_RW_MAX,
+};
+
+static const struct blobmsg_policy rpc_file_rw_policy[__RPC_F_RW_MAX] = {
+       [RPC_F_RW_PATH] = { .name = "path", .type = BLOBMSG_TYPE_STRING },
+       [RPC_F_RW_DATA] = { .name = "data", .type = BLOBMSG_TYPE_STRING },
 };
 
 enum {
@@ -87,7 +96,7 @@ enum {
 };
 
 static const struct blobmsg_policy rpc_exec_policy[__RPC_E_MAX] = {
-       [RPC_E_CMD] = { .name = "command", .type = BLOBMSG_TYPE_STRING },
+       [RPC_E_CMD]  = { .name = "command", .type = BLOBMSG_TYPE_STRING },
        [RPC_E_PARM] = { .name = "params",  .type = BLOBMSG_TYPE_ARRAY  },
        [RPC_E_ENV]  = { .name = "env",     .type = BLOBMSG_TYPE_TABLE  },
 };
@@ -129,17 +138,17 @@ rpc_errno_status(void)
 static struct blob_attr **
 rpc_check_path(struct blob_attr *msg, char **path, struct stat *s)
 {
-       static struct blob_attr *tb[__RPC_F_MAX];
+       static struct blob_attr *tb[__RPC_F_R_MAX];
 
-       blobmsg_parse(rpc_file_policy, __RPC_F_MAX, tb, blob_data(msg), blob_len(msg));
+       blobmsg_parse(rpc_file_r_policy, __RPC_F_R_MAX, tb, blob_data(msg), blob_len(msg));
 
-       if (!tb[RPC_F_PATH])
+       if (!tb[RPC_F_R_PATH])
        {
                errno = EINVAL;
                return NULL;
        }
 
-       *path = blobmsg_data(tb[RPC_F_PATH]);
+       *path = blobmsg_data(tb[RPC_F_R_PATH]);
 
        if (stat(*path, s))
                return NULL;
@@ -190,6 +199,7 @@ rpc_file_read(struct ubus_context *ctx, struct ubus_object *obj,
        blobmsg_add_string_buffer(&buf);
 
        ubus_send_reply(ctx, req, buf.head);
+       blob_buf_free(&buf);
        rv = UBUS_STATUS_OK;
 
 out:
@@ -203,21 +213,25 @@ rpc_file_write(struct ubus_context *ctx, struct ubus_object *obj,
                struct blob_attr *msg)
 {
        int fd;
-       char *path;
-       struct stat s;
-       struct blob_attr **tb;
+       struct blob_attr *tb[__RPC_F_RW_MAX];
 
-       if (!(tb = rpc_check_path(msg, &path, &s)))
-               return rpc_errno_status();
+       blobmsg_parse(rpc_file_rw_policy, __RPC_F_RW_MAX, tb,
+                     blob_data(msg), blob_len(msg));
 
-       if (!tb[RPC_F_DATA])
+       if (!tb[RPC_F_RW_PATH] || !tb[RPC_F_RW_DATA])
                return UBUS_STATUS_INVALID_ARGUMENT;
 
-       if ((fd = open(path, O_WRONLY)) < 0)
+       if ((fd = open(blobmsg_data(tb[RPC_F_RW_PATH]), O_CREAT | O_TRUNC | O_WRONLY)) < 0)
+               return rpc_errno_status();
+
+       if (write(fd, blobmsg_data(tb[RPC_F_RW_DATA]), blobmsg_data_len(tb[RPC_F_RW_DATA])) < 0)
+               return rpc_errno_status();
+
+       if (fsync(fd) < 0)
                return rpc_errno_status();
 
-       write(fd, blobmsg_data(tb[RPC_F_DATA]), blobmsg_data_len(tb[RPC_F_DATA]));
        close(fd);
+       sync();
 
        return 0;
 }
@@ -255,6 +269,7 @@ rpc_file_list(struct ubus_context *ctx, struct ubus_object *obj,
 
        blobmsg_close_array(&buf, c);
        ubus_send_reply(ctx, req, buf.head);
+       blob_buf_free(&buf);
 
        return 0;
 }
@@ -294,6 +309,7 @@ rpc_file_stat(struct ubus_context *ctx, struct ubus_object *obj,
        blobmsg_add_u32(&buf, "gid",   s.st_gid);
 
        ubus_send_reply(ctx, req, buf.head);
+       blob_buf_free(&buf);
 
        return 0;
 }
@@ -380,6 +396,7 @@ rpc_file_exec_reply(struct rpc_file_exec_context *c, int rv)
                rpc_ustream_to_blobmsg(&c->epipe.stream, "stderr");
 
                ubus_send_reply(c->context, &c->request, buf.head);
+               blob_buf_free(&buf);
        }
 
        ubus_complete_deferred_request(c->context, &c->request, rv);
@@ -457,7 +474,7 @@ rpc_file_exec_epipe_state_cb(struct ustream *s)
 
 static int
 rpc_file_exec_run(const char *cmd,
-                             const struct blob_attr *arg, const struct blob_attr *env,
+                  const struct blob_attr *arg, const struct blob_attr *env,
                   struct ubus_context *ctx, struct ubus_request_data *req)
 {
        pid_t pid;
@@ -580,7 +597,7 @@ rpc_file_exec(struct ubus_context *ctx, struct ubus_object *obj,
                return UBUS_STATUS_INVALID_ARGUMENT;
 
        return rpc_file_exec_run(blobmsg_data(tb[RPC_E_CMD]),
-                                                tb[RPC_E_PARM], tb[RPC_E_ENV], ctx, req);
+                                             tb[RPC_E_PARM], tb[RPC_E_ENV], ctx, req);
 }
 
 
@@ -588,10 +605,10 @@ static int
 rpc_file_api_init(const struct rpc_daemon_ops *o, struct ubus_context *ctx)
 {
        static const struct ubus_method file_methods[] = {
-               UBUS_METHOD("read",    rpc_file_read,  rpc_file_policy),
-               UBUS_METHOD("write",   rpc_file_write, rpc_file_policy),
-               UBUS_METHOD("list",    rpc_file_list,  rpc_file_policy),
-               UBUS_METHOD("stat",    rpc_file_stat,  rpc_file_policy),
+               UBUS_METHOD("read",    rpc_file_read,  rpc_file_r_policy),
+               UBUS_METHOD("write",   rpc_file_write, rpc_file_rw_policy),
+               UBUS_METHOD("list",    rpc_file_list,  rpc_file_r_policy),
+               UBUS_METHOD("stat",    rpc_file_stat,  rpc_file_r_policy),
                UBUS_METHOD("exec",    rpc_file_exec,  rpc_exec_policy),
        };
 
@@ -608,6 +625,6 @@ rpc_file_api_init(const struct rpc_daemon_ops *o, struct ubus_context *ctx)
        return ubus_add_object(ctx, &obj);
 }
 
-const struct rpc_plugin rpc_plugin = {
+struct rpc_plugin rpc_plugin = {
        .init = rpc_file_api_init
 };