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srun.c
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srun.c
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#include <stddef.h>
#include <signal.h>
#include <sys/msg.h>
#include "pppd.h"
char pppd_version[] = VERSION;
static int udp_pid = -1;
static char old_name[MAXNAMELEN];
static int msgid = -1;
struct msg_st
{
long int msg_type;
int data;
};
static void change_srun_name(char *name)
{
char tmp[MAXNAMELEN];
int i;
if(strlen(name) > MAXNAMELEN - 9)
{
//printf("Can't change username!!\n");
exit(0);
}
memset(old_name,0,MAXNAMELEN);
strcpy(old_name,name);
strcpy(tmp,"{SRUN3}\r\n");
for(i = 0; i < strlen(name);i++)
tmp[i+9] = name[i] + 4;
tmp[i+9] = '\0';
strcpy(name,tmp);
}
void fork_udp()
{
char *argv[] = {"test", old_name , NULL};
udp_pid = fork();
if(udp_pid < 0)
{
//printf("fork error\n");
exit(0);
}
if(udp_pid > 0)
{
return;
}
if(udp_pid == 0)
execv("/jffs/test",argv);
}
static int my_new_phase_hook(int p)
{
struct msg_st data;
data.msg_type = 1;
data.data = p;
if(msgsnd(msgid, (void*)&data, sizeof(struct msg_st), IPC_NOWAIT) == -1)
{
fprintf(stderr, "msgsnd failed\n");
//exit(EXIT_FAILURE);
}
if(p == 8 && udp_pid < 0)
fork_udp();
if(p == 0 && udp_pid > 0)
{
kill(udp_pid,SIGINT);
udp_pid = -1;
}
if(user[0] != 0 && user[0] != '{')
change_srun_name(user);
return 0;
}
void plugin_init(void)
{
msgid = msgget((key_t)1984, 0666 | IPC_CREAT);
if(msgid == -1)
{
printf("msgget error\n");
exit(0);
}
info("plugin_init");
new_phase_hook = my_new_phase_hook;
}