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Similarly for MSG_COMMAND - allow full imsg limit not arbitrary 2048.

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This commit is contained in:
Nicholas Marriott
2013-10-06 00:48:24 +01:00
parent f141e9b37a
commit fa1375c09f
4 changed files with 85 additions and 46 deletions
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66
client.c
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@ -54,7 +54,8 @@ int client_get_lock(char *);
int client_connect(char *, int);
void client_send_identify(int);
void client_send_environ(void);
void client_write_server(enum msgtype, void *, size_t);
int client_write_one(enum msgtype, int, const void *, size_t);
int client_write_server(enum msgtype, const void *, size_t);
void client_update_event(void);
void client_signal(int, short, void *);
void client_stdin_callback(int, short, void *);
@ -165,12 +166,13 @@ client_main(int argc, char **argv, int flags)
{
struct cmd *cmd;
struct cmd_list *cmdlist;
struct msg_command_data cmddata;
int cmdflags, fd;
struct msg_command_data *data;
int cmdflags, fd, i;
pid_t ppid;
enum msgtype msg;
char *cause;
struct termios tio, saved_tio;
size_t size;
/* Set up the initial command. */
cmdflags = 0;
@ -265,19 +267,32 @@ client_main(int argc, char **argv, int flags)
/* Send first command. */
if (msg == MSG_COMMAND) {
/* How big is the command? */
size = 0;
for (i = 0; i < argc; i++)
size += strlen(argv[i]) + 1;
data = xmalloc((sizeof *data) + size);
/* Fill in command line arguments. */
cmddata.pid = environ_pid;
cmddata.session_id = environ_session_id;
data->pid = environ_pid;
data->session_id = environ_session_id;
/* Prepare command for server. */
cmddata.argc = argc;
if (cmd_pack_argv(
argc, argv, cmddata.argv, sizeof cmddata.argv) != 0) {
data->argc = argc;
if (cmd_pack_argv(argc, argv, (char*)(data + 1), size) != 0) {
fprintf(stderr, "command too long\n");
free(data);
return (1);
}
size += sizeof *data;
client_write_server(msg, &cmddata, sizeof cmddata);
/* Send the command. */
if (client_write_server(msg, data, size) != 0) {
fprintf(stderr, "failed to send command\n");
free(data);
return (1);
}
free(data);
} else if (msg == MSG_SHELL)
client_write_server(msg, NULL, 0);
@ -349,12 +364,29 @@ client_send_environ(void)
}
}
/* Write a message to the server without a file descriptor. */
void
client_write_server(enum msgtype type, void *buf, size_t len)
/* Helper to send one message. */
int
client_write_one(enum msgtype type, int fd, const void *buf, size_t len)
{
imsg_compose(&client_ibuf, type, PROTOCOL_VERSION, -1, -1, buf, len);
client_update_event();
int retval;
retval = imsg_compose(&client_ibuf, type, PROTOCOL_VERSION, -1, fd,
(void*)buf, len);
if (retval != 1)
return (-1);
return (0);
}
/* Write a message to the server without a file descriptor. */
int
client_write_server(enum msgtype type, const void *buf, size_t len)
{
int retval;
retval = client_write_one(type, -1, buf, len);
if (retval == 0)
client_update_event();
return (retval);
}
/* Update client event based on whether it needs to read or read and write. */
@ -537,14 +569,16 @@ client_dispatch_wait(void *data0)
fatalx("bad MSG_STDOUT size");
memcpy(&stdoutdata, data, sizeof stdoutdata);
client_write(STDOUT_FILENO, stdoutdata.data, stdoutdata.size);
client_write(STDOUT_FILENO, stdoutdata.data,
stdoutdata.size);
break;
case MSG_STDERR:
if (datalen != sizeof stderrdata)
fatalx("bad MSG_STDERR size");
memcpy(&stderrdata, data, sizeof stderrdata);
client_write(STDERR_FILENO, stderrdata.data, stderrdata.size);
client_write(STDERR_FILENO, stderrdata.data,
stderrdata.size);
break;
case MSG_VERSION:
if (datalen != 0)