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-rw-r--r--segfault.c94
1 files changed, 67 insertions, 27 deletions
diff --git a/segfault.c b/segfault.c
index 3feca57..7005bfc 100644
--- a/segfault.c
+++ b/segfault.c
@@ -17,6 +17,7 @@
#include <syslog.h>
#include <grp.h> //setgroups
#include <dlfcn.h>
+#include <setjmp.h>
//epoch's libraries.
#include <idc.h>
@@ -106,6 +107,7 @@ struct tail {
unsigned short opt;
unsigned int inode;
int lines;
+ struct shit *me;
} *tailf;
char *shitlist[] = { 0 };
@@ -387,13 +389,18 @@ void eofp(FILE *fp) {
clearerr(fp);
}
-void tail_line_handler(int fd,char *line,int tailfd);
+void tail_line_handler(int fd,char *line,int tailfd,struct shit *me);
void tail_handler(struct shit *me,char *line) {//how how call this with line of NULL to signal EOF
// fprintf(stderr,"tail_handler: fd %d->%d got line: %s\n",me->fd,tailf[me->fd].srcfd,line);
if(line) {
// fprintf(stderr,"about to tail_line_handler");
- tail_line_handler(tailf[me->fd].srcfd,line,me->fd);//HACK. SHOULD NOT HAVE 3 HERE. //what /should/ it have?
+ if(strlen(line)) {
+ tail_line_handler(tailf[me->fd].srcfd,line,me->fd,me);//HACK. SHOULD NOT HAVE 3 HERE. //what /should/ it have?
+ } //else {
+ //privmsg(tailf[me->fd].srcfd,"epoch","hack");
+ //how about we mark this tail as EOF
+ //}
// fprintf(stderr,"back from tail_line_handler");
}
else tailf[me->fd].fp=0;
@@ -401,7 +408,7 @@ void tail_handler(struct shit *me,char *line) {//how how call this with line of
void c_raw(int fd,char *from,char *msg,struct user *user);//don't want to shuffle functions around, so just putting this here.
-void tail_line_handler(int fd,char *line,int tailfd) {//the fd passed to this needs to be the server fd
+void tail_line_handler(int fd,char *line,int tailfd,struct shit *me) {//the fd passed to this needs to be the server fd
char *tmp=strdup(line);
char *tmp2;
// char *tmp3;
@@ -415,7 +422,7 @@ void tail_line_handler(int fd,char *line,int tailfd) {//the fd passed to this ne
//if(i == currentmaxtails) return;//failed to find this tail.
i=tailfd;//see hack about "durr I forgot I did this" in file_tail
//tail_line_handler cn be used in both tail_handler and extra_handler now.
- //tailf[i].lines++;
+ tailf[i].lines++;
if(tailf[i].opt & TAILO_EVAL) {//eval
if(tailf[i].opt & TAILO_FORMAT) {
tmp2=format_magic(fd,tailf[i].to,tailf[i].user,tmp,tailf[i].args);//the line read is the format string.
@@ -458,10 +465,11 @@ void tail_line_handler(int fd,char *line,int tailfd) {//the fd passed to this ne
privmsg(fd,tailf[i].to,tmp);
}
}
- //if(tailf[i].lines >= line_limit && (tailf[i].opt & TAILO_SPAM)) {
- // tailf[i].lines=-1; //lock it.
- // privmsg(fd,tailf[i].to,"--more--");
- //}
+ /*if(tailf[i].lines >= line_limit && (tailf[i].opt & TAILO_SPAM)) {
+ tailf[i].lines=-1;//lock it.
+ me->read_lines_for_us=0;//we do NOT want libidc to read lines for us while we're locked.
+ privmsg(fd,tailf[i].to,"--more--");
+ }*/
free(tmp);
}
@@ -633,6 +641,7 @@ void file_tail(int fd,char *from,char *file,char *args,int opt,struct user *user
tailf[i].lines=0;
tailf[i].srcfd=fd;//this is like tailf[i].to //maybe combine somehow?
i=add_fd(fdd,tail_handler);//returns the index.
+ tailf[i].me=&(idc.fds[i]);
idc.fds[i].keep_open=!(opt & TAILO_CLOSE);
// idc.fds[i].extra_info=tailf[fdd];//we need this somehow.
}
@@ -656,8 +665,9 @@ void c_dlopen(int fd,char *from,char *line,...) {
}
void c_dlclose(int fd,char *from,char *line,...) {
- void *handle=(void *)atoi(line);
- dlclose(handle);
+ void *handle=(void *)strtoul(line?line:"",0,0);
+ if(handle) dlclose(handle);
+ else privmsg(fd,from,"usage: !dlclose handle");
}
void c_dlsym(int fd,char *from,char *line,...) {
@@ -674,7 +684,7 @@ void c_dlsym(int fd,char *from,char *line,...) {
}
*symbol=0;
symbol++;
- handle=(void *)atoi(line);
+ handle=(void *)strtoul(line,0,0);
snprintf(tmp,sizeof(tmp)-1,"address of %s in %p: %p",symbol,handle,dlsym(handle,symbol));
privmsg(fd,from,tmp);
}
@@ -731,7 +741,7 @@ void prestartup_stuff(int fd) {
void c_addserver(int fd,char *from,char *line,...) {
int fdd;
if(!line) {
- privmsg(fd,from,"wat");
+ privmsg(fd,from,"usage: !addserver host [default-port-6667]");
return;
}
char *port=strchr(line,' ');
@@ -763,6 +773,12 @@ void c_putenv(int fd,char *from,char *line,...) {
putenv(strdup(line));//OH MY GOD. WHAT THE FUCK? MEMORY LEAK AND NO CHECKS AT ALL!?!?
}
+jmp_buf ex_buf__;
+
+void segvhandler(int sig,siginfo_t *siginfo,void *context) {
+ longjmp(ex_buf__,1);
+}
+
void c_mem(int fd,char *from,char *line,...) {
char tmp[512];
// char *function=line;
@@ -777,17 +793,33 @@ void c_mem(int fd,char *from,char *line,...) {
privmsg(fd,from,"sscanf didn't get an address.");
return;
}
- if((v=strchr(line,' '))) {
- *v=0;
- v++;
- sscanf(v,"%02hhx",&value);
- *((unsigned char *)address)=value;
- snprintf(tmp,sizeof(tmp)-1,"address %08x now containes the value %02x",address,value);
- privmsg(fd,from,tmp);
+// privmsg(fd,from,"setting segfault handler so we don't crash if you fat fingered an address.");
+ struct sigaction act;
+ memset(&act,0,sizeof(struct sigaction));
+ sigemptyset(&act.sa_mask);
+ act.sa_sigaction = &segvhandler;
+ act.sa_flags = SA_SIGINFO | SA_NODEFER;
+ sigaction(SIGSEGV,&act,0);
+ if(!setjmp(ex_buf__)) {
+ if((v=strchr(line,' '))) {
+ *v=0;
+ v++;
+ sscanf(v,"%02hhx",&value);
+ *((unsigned char *)address)=value;
+ snprintf(tmp,sizeof(tmp)-1,"address %08x now containes the value %02x (%c)",address,value,isprint(value)?value:'?');
+ privmsg(fd,from,tmp);
+ } else {
+ value=*((unsigned char *)address);
+ snprintf(tmp,sizeof(tmp)-1,"address %08x contains %02x (%c)",address,value,isprint(value)?value:'?');
+ privmsg(fd,from,tmp);
+ }
} else {
- snprintf(tmp,sizeof(tmp)-1,"address %08x contains %02x",address,*((unsigned char *)address));
- privmsg(fd,from,tmp);
+ privmsg(fd,from,"Segmentation Fault");
}
+// privmsg(fd,from,"setting segfault handler back to default.");
+ act.sa_handler = SIG_DFL;
+ sigaction(SIGSEGV,&act,0);
+ //signal(SIGSEGV,SIG_DFL);
return;
}
@@ -1099,6 +1131,8 @@ void c_tailunlock(int fd,char *from,char *file,...) {
if(tailf[i].fp) {
if(!strcmp(file,tailf[i].file)) {
tailf[i].lines=0;
+ tailf[i].me->read_lines_for_us=1;
+ tailf[i].me->eof=0;
return;
}
}
@@ -1124,8 +1158,8 @@ char append_file(int fd,char *from,char *file,char *line,unsigned short nl) {
snprintf(tmp,sizeof(tmp)-1,"append_file opened file '%s' with fd: %d / %d / %d\n",file,fdd,currentmaxtails,maxtails);
privmsg(fd,"#cmd",tmp);
}
- mywrite(fdd,line);
- mywrite(fdd,(char *)&nl);//HACK. might want to fix this. opposite-endian will break.
+ snprintf(tmp,sizeof(tmp)-1,"%s%c",line,nl);
+ mywrite(fdd,tmp);
// dprintf(fdd,"%s\n",line);
// fcntl(fdd,F_SETFL,O_WRONLY|O_APPEND|O_CREAT);
close(fdd);
@@ -1149,6 +1183,7 @@ char append_file(int fd,char *from,char *file,char *line,unsigned short nl) {
void c_leetappend(int fd,char *from,char *msg,...) {
unsigned short nl;
+ char tmp[256];
if(!msg) {
privmsg(fd,from,"usage: !leetappend file EOL-char-dec line-to-put");
return;
@@ -1171,6 +1206,10 @@ void c_leetappend(int fd,char *from,char *msg,...) {
return;
}
nl=((snl[0]-'0')*10)+((snl[1]-'0'));
+ if(debug) {
+ snprintf(tmp,sizeof(tmp)-1,"file: %s eol: %d line: %s\n",file,nl,line);
+ privmsg(fd,from,tmp);
+ }
append_file(fd,from,file,line,nl);
}
@@ -1378,7 +1417,7 @@ int message_handler(int fd,char *from,struct user *user,char *msg,int redones) {
char to_me;
int len;
// int sz;
- if(*msg == ' ' || *msg == 0) return 1;//
+ if(*msg == 0) return 1;//
printf("message_handler: fd: %d redones: %d msg: '%s'\n",fd,redones,msg);
if(redones && message_handler_trace) {
snprintf(tmp,sizeof(tmp)-1,"trace: n: %s u: %s h: %s message '%s' redones: '%d'",user->nick,user->user,user->host,msg,redones);
@@ -1471,6 +1510,7 @@ int message_handler(int fd,char *from,struct user *user,char *msg,int redones) {
}
if(redones >= RECURSE_LIMIT) {
privmsg(fd,from,"I don't know if I'll ever get out of this alias hole you're telling me to dig. Fuck this.");
+ privmsg(fd,from,command);
}
free(oldcommand);
return 0;//I guess we didn't find anyway. let it fall back to generic handlers.
@@ -1528,7 +1568,7 @@ void line_handler(int fd,char *line) {//this should be built into the libary?
}
}
}
- if(a[0] && user->nick && a[1]) {
+ if(a[0] && user->nick && a[1]) {//
strcpy(tmp,";");
strcat(tmp,a[0]);
if((ht_getnode(&alias,tmp)) != NULL) {
@@ -1649,8 +1689,8 @@ int main(int argc,char *argv[]) {
BUILDIN("dlsym",c_dlsym);
BUILDIN("dlclose",c_dlclose);
BUILDIN("addserver",c_addserver);
-// BUILDIN("peek",c_mem);
-// BUILDIN("poke",c_mem);
+ BUILDIN("peek",c_mem);
+ BUILDIN("poke",c_mem);
mode_magic=1;
snooty=0;
message_handler_trace=0;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 08:40:33 +0000