shaba/lvm2
1
0
Fork 0
mirror of git://sourceware.org/git/lvm2.git synced 2024-12-22 17:35:59 +03:00
Code Releases Activity

Improve error handling & reporting in common daemon code.

Browse Source
This commit is contained in:
Petr Rockai 2012-02-26 08:46:28 +00:00
parent 7ce18df26b
commit 50730ddd96
3 changed files with 15 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
daemons/common/daemon-client.c
View File

@ -9,22 +9,18 @@
#include <errno.h> // ENOMEM
daemon_handle daemon_open(daemon_info i) {
daemon_handle h = { .protocol_version = 0 };
daemon_handle h = { .protocol_version = 0, .error = 0 };
daemon_reply r = { .cft = NULL };
struct sockaddr_un sockaddr;
if ((h.socket_fd = socket(PF_UNIX, SOCK_STREAM /* | SOCK_NONBLOCK */, 0)) < 0) {
perror("socket");
if ((h.socket_fd = socket(PF_UNIX, SOCK_STREAM /* | SOCK_NONBLOCK */, 0)) < 0)
goto error;
}
memset(&sockaddr, 0, sizeof(sockaddr));
fprintf(stderr, "[C] connecting to %s\n", i.socket);
strcpy(sockaddr.sun_path, i.socket);
sockaddr.sun_family = AF_UNIX;
if (connect(h.socket_fd,(struct sockaddr *) &sockaddr, sizeof(sockaddr))) {
perror("connect");
if (connect(h.socket_fd,(struct sockaddr *) &sockaddr, sizeof(sockaddr)))
goto error;
}
r = daemon_send_simple(h, "hello", NULL);
if (r.error || strcmp(daemon_reply_str(r, "response", "unknown"), "OK"))
@ -42,7 +38,9 @@ daemon_handle daemon_open(daemon_info i) {
daemon_reply_destroy(r);
return h;
error:
h.error = errno;
if (h.socket_fd >= 0)
close(h.socket_fd);
if (r.cft)
@ -61,13 +59,15 @@ daemon_reply daemon_send(daemon_handle h, daemon_request rq)
}
assert(rq.buffer);
write_buffer(h.socket_fd, rq.buffer, strlen(rq.buffer));
if (!write_buffer(h.socket_fd, rq.buffer, strlen(rq.buffer)))
reply.error = errno;
dm_free(rq.buffer);
if (read_buffer(h.socket_fd, &reply.buffer)) {
reply.cft = dm_config_from_string(reply.buffer);
} else
reply.error = 1;
reply.error = errno;
return reply;
}

1
daemons/common/daemon-client.h
View File

@ -21,6 +21,7 @@ typedef struct {
int socket_fd; /* the fd we use to talk to the daemon */
const char *protocol;
int protocol_version; /* version of the protocol the daemon uses */
int error;
} daemon_handle;
typedef struct {

6
daemons/common/daemon-shared.c
View File

@ -24,12 +24,14 @@ int read_buffer(int fd, char **buffer) {
int result = read(fd, (*buffer) + bytes, buffersize - bytes);
if (result > 0)
bytes += result;
if (result == 0)
if (result == 0) {
errno = ECONNRESET;
goto fail; /* we should never encounter EOF here */
}
if (result < 0 && errno != EAGAIN && errno != EWOULDBLOCK)
goto fail;
if ((!strncmp((*buffer) + bytes - 4, "\n##\n", 4))) {
if (!strncmp((*buffer) + bytes - 4, "\n##\n", 4)) {
*(*buffer + bytes - 4) = 0;
break; /* success, we have the full message now */
}