/
lifl.c
1560 lines (1392 loc) · 43.5 KB
/
lifl.c
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/*******************************************************************************
*
* LIFL version 0.1 beta.
* Written by Frode Ulsund 2015.
* Based on work from Rémi Flament and Victor Itkin.
*
* Please submit bug reports, feature requests and feedback to fr@68k.no
*
* This library is free software; you can distribute it and/or modify it under
* the terms of the GNU General Public License (GPL), as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GPL in the file COPYING for more
* details.
*
*******************************************************************************/
#include "lifl.h"
#include "const.h"
long id;
int fd0;
MYSQL *conn;
void read_cfg(const char* file)
{
memset(&conf,0,sizeof(conf));
FILE *fp;
fp=fopen(file,"r");
if(!fp)
{
fprintf(stderr,"Can not read config file : %s\n",file);
exit(EXIT_FAILURE);
}
char *line=NULL;
size_t len=0;
char port[6];
char uid[10];
char size[10];
memset(port,0,6);
memset(uid,0,10);
memset(size,0,10);
while(getline(&line,&len,fp)!=-1)
{
get_cfg_str(line,conf.hostname, "hostname=",256);
get_cfg_str(line,conf.tagname, "tagname=",64);
get_cfg_str(line,conf.mountpoint, "mountpoint=",1024);
get_cfg_val(line,&conf.allow_other, "allow_other=on");
get_cfg_val(line,&conf.default_permissions, "default_permissions=on");
get_cfg_val(line,&conf.nonempty, "nonempty=on");
get_cfg_str(line,conf.db_host, "db_host=",256);
get_cfg_str(line,port, "db_port=",6);
get_cfg_str(line,conf.db_database, "db_database=",64);
get_cfg_str(line,conf.db_username, "db_username=",64);
get_cfg_str(line,conf.db_password, "db_password=",64);
get_cfg_str(line,conf.db_table, "db_table=",64);
get_cfg_str(line,conf.db_dump_table, "db_dump_table=",64);
get_cfg_str(line,conf.db_error_table, "db_error_table=",64);
get_cfg_val(line,&conf.enable_error_messages, "enable_error_messages=on");
get_cfg_val(line,&conf.enable_write_dump, "enable_write_dump=on");
get_cfg_str(line,uid, "write_dump_effective_uid=",10);
get_cfg_str(line,size, "write_dump_size_less_than=",10);
get_cfg_str(line,conf.dump_cmd, "write_dump_cmd=",1024);
get_cfg_val(line,&conf.syscall_getattr, "syscall_getattr=on");
get_cfg_val(line,&conf.syscall_access, "syscall_access=on");
get_cfg_val(line,&conf.syscall_readlink, "syscall_readlink=on");
get_cfg_val(line,&conf.syscall_readdir, "syscall_readdir=on");
get_cfg_val(line,&conf.syscall_mknod, "syscall_mknod=on");
get_cfg_val(line,&conf.syscall_mkdir, "syscall_mkdir=on");
get_cfg_val(line,&conf.syscall_unlink, "syscall_unlink=on");
get_cfg_val(line,&conf.syscall_rmdir, "syscall_rmdir=on");
get_cfg_val(line,&conf.syscall_symlink, "syscall_symlink=on");
get_cfg_val(line,&conf.syscall_rename, "syscall_rename=on");
get_cfg_val(line,&conf.syscall_link, "syscall_link=on");
get_cfg_val(line,&conf.syscall_chmod, "syscall_chmod=on");
get_cfg_val(line,&conf.syscall_chown, "syscall_chown=on");
get_cfg_val(line,&conf.syscall_truncate, "syscall_truncate=on");
#ifdef HAVE_UTIMENSAT
get_cfg_val(line,&conf.syscall_utimens, "syscall_utimens=on");
#endif
get_cfg_val(line,&conf.syscall_open, "syscall_open=on");
get_cfg_val(line,&conf.syscall_read, "syscall_read=on");
get_cfg_val(line,&conf.syscall_write, "syscall_write=on");
get_cfg_val(line,&conf.syscall_statfs, "syscall_statfs=on");
#ifdef HAVE_POSIX_FALLOCATE
get_cfg_val(line,&conf.syscall_fallocate, "syscall_fallocate=on");
#endif
#ifdef HAVE_SETXATTR
get_cfg_val(line,&conf.syscall_setxattr, "syscall_setxattr=on");
get_cfg_val(line,&conf.syscall_getxattr, "syscall_getxattr=on");
get_cfg_val(line,&conf.syscall_listxattr, "syscall_listxattr=on");
get_cfg_val(line,&conf.syscall_removexattr, "syscall_removexattr=on");
#endif
get_cfg_val(line,&conf.log_username, "log_username=on");
get_cfg_val(line,&conf.log_groupname, "log_groupname=on");
get_cfg_val(line,&conf.log_tty, "log_tty=on");
get_cfg_val(line,&conf.log_login_time, "log_login_time=on");
get_cfg_val(line,&conf.log_remote_host, "log_remote_host=on");
get_cfg_val(line,&conf.log_cmd, "log_cmd=on");
get_cfg_val(line,&conf.log_args, "log_args=on");
get_cfg_val(line,&conf.log_ppid, "log_ppid=on");
get_cfg_val(line,&conf.log_ppid_cmd, "log_ppid_cmd=on");
}
fclose(fp);
free(line);
if(!is_str(conf.hostname))
{
if(gethostname(conf.hostname,256)==-1) memset(conf.hostname,0,256);
}
if(sscanf(port,"%i",&conf.db_port)==0)
{
fprintf(stderr,"You must provide a port number.\n");
exit(EXIT_FAILURE);
}
if(conf.enable_write_dump)
{
if(is_str(uid))
{
if(sscanf(uid,"%i",&conf.dump_uid)==0)
{
fprintf(stderr,"User id must be an integer value.\n");
exit(EXIT_FAILURE);
}
}
if(is_str(size))
{
if(sscanf(size,"%i",&conf.dump_size)==0)
{
fprintf(stderr,"Size limit must be an integer value.\n");
exit(EXIT_FAILURE);
}
}
}
if(!is_full_path(conf.mountpoint))
{
fprintf(stderr,"Use full path for mountpoint.\n");
fprintf(stderr,"Mountpoint '%s' is not valid.\n",conf.mountpoint);
exit(EXIT_FAILURE);
}
}
void test_cfg(void)
{
fprintf(stdout,"\nConfiguration\n");
fprintf(stdout,"----------------------------------------------------\n");
fprintf(stdout,"hostname :\t\t%s\n",conf.hostname);
fprintf(stdout,"tagname :\t\t%s\n",conf.tagname);
fprintf(stdout,"mountpoint :\t\t%s\n",conf.mountpoint);
fprintf(stdout,"----------------------------------------------------\n");
fprintf(stdout,"allow_other :\t\t"); if(conf.allow_other) fprintf(stdout,"yes\n"); else fprintf(stdout,"no\n");
fprintf(stdout,"default_permissions:\t"); if(conf.default_permissions) fprintf(stdout,"yes\n"); else fprintf(stdout,"no\n");
fprintf(stdout,"nonempty:\t\t"); if(conf.nonempty) fprintf(stdout,"yes\n"); else fprintf(stdout,"no\n");
fprintf(stdout,"----------------------------------------------------\n");
fprintf(stdout,"db_host :\t\t%s\n",conf.db_host);
fprintf(stdout,"db_port :\t\t%i\n",conf.db_port);
fprintf(stdout,"db_database :\t\t%s\n",conf.db_database);
fprintf(stdout,"db_username :\t\t%s\n",conf.db_username);
fprintf(stdout,"db_password :\t\t******\n");
fprintf(stdout,"db_table :\t\t%s\n",conf.db_table);
fprintf(stdout,"----------------------------------------------------\n");
if(conf.enable_error_messages)
{
fprintf(stdout,"Error messages enabled.\n");
fprintf(stdout,"db_error_table:\t\t%s\n",conf.db_error_table);
}
if(conf.enable_write_dump)
{
fprintf(stdout,"Write dumps enabled.\n");
fprintf(stdout,"db_dump_table:\t\t%s\n",conf.db_dump_table);
if(conf.dump_uid) fprintf(stdout,"-- Effective user-id '%i'.\n",conf.dump_uid);
if(conf.dump_size) fprintf(stdout,"-- Limit writes to '%i' kilobytes.\n",conf.dump_size);
if(is_str(conf.dump_cmd)) fprintf(stdout,"-- Only monitoring the '%s' command.\n",conf.dump_cmd);
}
fprintf(stdout,"----------------------------------------------------\n");
fprintf(stdout,"Following system calls are monitored :\n");
if(conf.syscall_getattr) fprintf(stdout,"getattr\n");
if(conf.syscall_access) fprintf(stdout,"access\n");
if(conf.syscall_readlink) fprintf(stdout,"readlink\n");
if(conf.syscall_readdir) fprintf(stdout,"readdir\n");
if(conf.syscall_mknod) fprintf(stdout,"mknod\n");
if(conf.syscall_mkdir) fprintf(stdout,"mkdir\n");
if(conf.syscall_unlink) fprintf(stdout,"unlink\n");
if(conf.syscall_rmdir) fprintf(stdout,"rmdir\n");
if(conf.syscall_symlink) fprintf(stdout,"symlink\n");
if(conf.syscall_rename) fprintf(stdout,"rename\n");
if(conf.syscall_link) fprintf(stdout,"link\n");
if(conf.syscall_chmod) fprintf(stdout,"chmod\n");
if(conf.syscall_chown) fprintf(stdout,"chown\n");
if(conf.syscall_truncate) fprintf(stdout,"truncate\n");
if(conf.syscall_utimens) fprintf(stdout,"utimens\n");
if(conf.syscall_open) fprintf(stdout,"open\n");
if(conf.syscall_read) fprintf(stdout,"read\n");
if(conf.syscall_write) fprintf(stdout,"write\n");
if(conf.syscall_statfs) fprintf(stdout,"statfs\n");
if(conf.syscall_fallocate) fprintf(stdout,"fallocate\n");
if(conf.syscall_setxattr) fprintf(stdout,"setxattr\n");
if(conf.syscall_getxattr) fprintf(stdout,"getxattr\n");
if(conf.syscall_listxattr) fprintf(stdout,"listxattr\n");
if(conf.syscall_removexattr) fprintf(stdout,"removexattr\n");
fprintf(stdout,"----------------------------------------------------\n");
fprintf(stdout,"Additional logging enabled:\n");
if(conf.log_username) fprintf(stdout,"username\n");
if(conf.log_groupname) fprintf(stdout,"groupname\n");
if(conf.log_tty) fprintf(stdout,"tty\n");
if(conf.log_login_time) fprintf(stdout,"logintime\n");
if(conf.log_remote_host) fprintf(stdout,"remotehost\n");
if(conf.log_cmd) fprintf(stdout,"cmd\n");
if(conf.log_args) fprintf(stdout,"args\n");
if(conf.log_ppid) fprintf(stdout,"ppid\n");
if(conf.log_ppid_cmd) fprintf(stdout,"ppidcmd\n");
fprintf(stdout,"----------------------------------------------------\n");
conn=mysql_init(NULL);
if(!conn) sql_err(conn,NULL);
if(!mysql_real_connect(conn,conf.db_host,conf.db_username,conf.db_password,conf.db_database,conf.db_port,NULL,0)) sql_err(conn,NULL);
fprintf(stdout,"connectivity \t\t\t[ok]\n");
id=1;
logg.logg_id=id;
get_timestamp(0,logg.time);
strncpy(logg.host,conf.hostname,256);
strncpy(logg.tag,"test",64);
strncpy(logg.operation,"sql insert",32);
logg.uid=800;
logg.gid=800;
strncpy(logg.username,"test",256);
strncpy(logg.groupname,"test",256);
strncpy(logg.tty,"pts/0",16);
get_timestamp(0,logg.login_time);
strncpy(logg.remote_host,"localhost",256);
strncpy(logg.cmd,"lifl",1024);
strncpy(logg.args,"--test",1024);
logg.pid=200;
logg.ppid=100;
strncpy(logg.p_cmd,"system",1024);
strncpy(logg.file,"/path/to/folder",1024);
logg.protection=330;
strncpy(logg.owner,"admin",256);
strncpy(logg.group,"admin",256);
size_t size;
size=strlen(INS)
+strlen(conf.db_database)
+strlen(conf.db_table)
+20
+strlen(logg.time)
+strlen(logg.host)
+strlen(logg.tag)
+strlen(logg.operation)
+10
+10
+strlen(logg.username)
+strlen(logg.groupname)
+strlen(logg.tty)
+strlen(logg.login_time)
+strlen(logg.remote_host)
+strlen(logg.cmd)
+strlen(logg.args)
+10
+10
+strlen(logg.p_cmd)
+strlen(logg.file)
+10
+strlen(logg.owner)
+strlen(logg.group);
char *buf;
buf=malloc(size);
if(!buf) exit(EXIT_FAILURE);
if((size=snprintf(buf,size,
INS,
conf.db_database,
conf.db_table,
logg.logg_id,
logg.time,
logg.host,
logg.tag,
logg.operation,
logg.uid,
logg.gid,
logg.username,
logg.groupname,
logg.tty,
logg.login_time,
logg.remote_host,
logg.cmd,
logg.args,
logg.pid,
logg.ppid,
logg.p_cmd,
logg.file,
logg.protection,
logg.owner,
logg.group))) {
if(mysql_real_query(conn,buf,size)) sql_err(conn,buf);
} ;
free(buf);
fprintf(stdout,"%s \t\t\t[ok]\n",conf.db_table);
if(conf.enable_write_dump)
{
FILE *fp;
fp=fopen("/bin/bash","r");
if(fp)
{
buf=malloc(1024);
if(!buf) exit(EXIT_FAILURE);
size=fread(buf,1,1024,fp);
fclose(fp);
}
else
{
buf=NULL;
size=0;
}
data_dump.size=size;
data_dump.offset=0;
data_dump.write_data=buf;
sql_dump_write();
free(buf);
fprintf(stdout,"%s \t\t\t[ok]\n",conf.db_dump_table);
}
if(conf.enable_error_messages)
{
sql_write_err();
fprintf(stdout,"%s \t\t\t\t[ok]\n",conf.db_error_table);
}
mysql_close(conn);
}
void sql_write(const char* path,const char* op)
{
memset(&logg,0,sizeof(logg));
++id;
logg.logg_id=id;
get_timestamp(0,logg.time);
strncpy(logg.operation,op,32);
// REMEMBER: path my be non existing //
char *absolute_path;
char *relative_path;
absolute_path=get_abs_path(path);
relative_path=get_rel_path(path);
strncpy(logg.file,absolute_path,1024);
struct stat stbuf;
if(lstat(relative_path,&stbuf)==0)
{
logg.protection=(unsigned int)stbuf.st_mode;
uid_t uid;
uid=stbuf.st_uid;
size_t buflen;
buflen=sysconf(_SC_GETPW_R_SIZE_MAX);
if(buflen==-1) exit(EXIT_FAILURE);
char *buf;
buf=malloc(buflen);
if(!buf) exit(EXIT_FAILURE);
struct passwd pwd;
struct passwd *pwd_result;
if(getpwuid_r(uid,&pwd,buf,buflen,&pwd_result)==0)
{
if(pwd_result) strncpy(logg.owner,pwd.pw_name,256);
}
free(buf);
gid_t gid;
gid=stbuf.st_gid;
buflen=sysconf(_SC_GETGR_R_SIZE_MAX);
if(buflen==-1) exit(EXIT_FAILURE);
buf=malloc(buflen);
if(!buf) exit(EXIT_FAILURE);
struct group grp;
struct group *grp_result;
if(getgrgid_r(gid,&grp,buf,buflen,&grp_result)==0)
{
if(grp_result) strncpy(logg.group,grp.gr_name,256);
}
free(buf);
}
free(absolute_path);
free(relative_path);
strncpy(logg.host,conf.hostname,256);
strncpy(logg.tag,conf.tagname,64);
logg.uid=(unsigned int)fuse_get_context()->uid;
logg.gid=(unsigned int)fuse_get_context()->gid;
logg.pid=(unsigned int)fuse_get_context()->pid;
if(conf.log_username)
{
uid_t uid;
uid=fuse_get_context()->uid;
size_t buflen;
buflen=sysconf(_SC_GETPW_R_SIZE_MAX);
if(buflen==-1) exit(EXIT_FAILURE);
char *buf;
buf=malloc(buflen);
if(!buf) exit(EXIT_FAILURE);
struct passwd pwd;
struct passwd *result;
if(getpwuid_r(uid,&pwd,buf,buflen,&result)==0)
{
if(result) strncpy(logg.username,pwd.pw_name,256);
}
free(buf);
if(is_str(logg.username))
{
if(conf.log_tty||conf.log_remote_host||conf.log_login_time)
{
setutxent();
struct utmpx *utx;
while((utx=getutxent()))
{
if(!strcmp(logg.username,utx->ut_user))
{
if(conf.log_tty) strncpy(logg.tty,utx->ut_line,16);
if(conf.log_remote_host) strncpy(logg.remote_host,utx->ut_host,256);
if(conf.log_login_time) get_timestamp(utx->ut_tv.tv_sec,logg.login_time);
}
}
endutxent();
}
}
}
if(conf.log_groupname)
{
gid_t gid;
gid=fuse_get_context()->gid;
size_t buflen;
buflen=sysconf(_SC_GETGR_R_SIZE_MAX);
if(buflen==-1) exit(EXIT_FAILURE);
char *buf;
buf=malloc(buflen);
if(!buf) exit(EXIT_FAILURE);
struct group grp;
struct group *result;
if(getgrgid_r(gid,&grp,buf,buflen,&result)==0)
{
if(result) strncpy(logg.groupname,grp.gr_name,256);
}
free(buf);
}
if(conf.log_cmd)
{
size_t size;
size=strlen("/proc//cmdline")+10+1;
char *buf;
buf=malloc(size);
if(!buf) exit(EXIT_FAILURE);
if(snprintf(buf,size,"/proc/%i/cmdline",logg.pid))
{
FILE *fp;
fp=fopen(buf,"r");
free(buf);
if(!fp) return;
buf=malloc(1024);
if(!buf) exit(EXIT_FAILURE);
size_t bytes_r;
bytes_r=fread(buf,1,1024,fp);
fclose(fp);
if(bytes_r==0)
{
free(buf);
return;
}
strncpy(logg.cmd,buf,1024);
if(conf.log_args)
{
int i=0;
while(++i<bytes_r-1) if(buf[i]==0x00) buf[i]=0x20;
int str_off=strlen(logg.cmd);
strncpy(logg.args,&buf[str_off],1024);
free(buf);
}
}
}
if(conf.log_ppid)
{
size_t size;
size=strlen("/proc//status")+10+1;
char *buf;
buf=malloc(size);
if(!buf) exit(EXIT_FAILURE);
if(snprintf(buf,size,"/proc/%i/status",logg.pid))
{
FILE *fp;
fp=fopen(buf,"r");
free(buf);
if(!fp) return;
char *line=NULL;
size_t len=0;
while(getline(&line,&len,fp)!=-1)
{
if(!strncmp(line,"PPid:",5))
{
if((strlen(line)-6)<20) sscanf(line,"PPid:\t%i",&logg.ppid);
break;
}
}
fclose(fp);
free(line);
}
if(conf.log_ppid_cmd)
{
size_t size;
size=strlen("/proc//cmdline")+10+1;
char *buf;
buf=malloc(size);
if(!buf) exit(EXIT_FAILURE);
if(snprintf(buf,size,"/proc/%i/cmdline",logg.ppid))
{
FILE *fp;
fp=fopen(buf,"r");
free(buf);
if(!fp) return;
buf=malloc(1024);
if(!buf) exit(EXIT_FAILURE);
size_t bytes_r;
bytes_r=fread(buf,1,1024,fp);
fclose(fp);
if(bytes_r==0)
{
free(buf);
return;
}
strncpy(logg.p_cmd,buf,1024);
free(buf);
}
}
}
size_t size;
size=strlen(INS)
+strlen(conf.db_database)
+strlen(conf.db_table)
+20
+strlen(logg.time)
+strlen(logg.host)
+strlen(logg.tag)
+strlen(logg.operation)
+10
+10
+strlen(logg.username)
+strlen(logg.groupname)
+strlen(logg.tty)
+strlen(logg.login_time)
+strlen(logg.remote_host)
+strlen(logg.cmd)
+strlen(logg.args)
+10
+10
+strlen(logg.p_cmd)
+strlen(logg.file)
+10
+strlen(logg.owner)
+strlen(logg.group);
char *buf;
buf=malloc(size);
if(!buf) exit(EXIT_FAILURE);
if((size=snprintf(buf,size,
INS,
conf.db_database,
conf.db_table,
logg.logg_id,
logg.time,
logg.host,
logg.tag,
logg.operation,
logg.uid,
logg.gid,
logg.username,
logg.groupname,
logg.tty,
logg.login_time,
logg.remote_host,
logg.cmd,
logg.args,
logg.pid,
logg.ppid,
logg.p_cmd,
logg.file,
logg.protection,
logg.owner,
logg.group))) {
if(mysql_real_query(conn,buf,size)) sql_err(conn,buf);
}
free(buf);
}
void sql_write_err(void)
{
errors.logg_id=id;
char str[512];
memset(str,0,512);
int ret;
ret=strerror_r(errno,str,512);
if(ret!=0) snprintf(str,512,"Unknown error");
snprintf(errors.error_message,512,"ERROR (%s)",str);
size_t size;
size=strlen(ERR)
+strlen(conf.db_database)
+strlen(conf.db_error_table)
+20
+strlen(errors.error_message)
+1;
char *buf;
buf=malloc(size);
if(!buf) exit(EXIT_FAILURE);
if((size=snprintf(buf,size,
ERR,
conf.db_database,
conf.db_error_table,
errors.logg_id,
errors.error_message))) {
if(mysql_real_query(conn,buf,size)) sql_err(conn,buf);
}
free(buf);
}
void sql_dump_write(void)
{
data_dump.logg_id=id;
char *to;
to=malloc(data_dump.size*2+1);
if(!to) exit(EXIT_FAILURE);
unsigned long length;
length=mysql_real_escape_string(conn,to,data_dump.write_data,data_dump.size);
size_t size;
size=strlen(BWD)
+strlen(conf.db_database)
+strlen(conf.db_dump_table)
+20
+10
+10
+length
+1;
char *buf;
buf=malloc(size);
if(!buf) exit(EXIT_FAILURE);
if((size=snprintf(buf,size,
BWD,
conf.db_database,
conf.db_dump_table,
data_dump.logg_id,
data_dump.size,
data_dump.offset,
to))) {
if(mysql_real_query(conn,buf,size)) sql_err(conn,buf);
}
free(to);
free(buf);
}
void sql_get_last_id(void)
{
size_t size;
size=strlen(GET)
+strlen(conf.db_database)
+strlen(conf.db_table)
+1;
char *buf;
buf=malloc(size);
if(!buf) exit(EXIT_FAILURE);
if((size=snprintf(buf,size,
GET,
conf.db_database,
conf.db_table))) {
if(mysql_real_query(conn,buf,size)) sql_err(conn,buf);
MYSQL_RES *res;
res=mysql_store_result(conn);
if(!res) sql_err(conn,buf);
free(buf);
MYSQL_ROW row;
row=mysql_fetch_row(res);
if(!row) id=0;
else if(sscanf(row[0],"%li",&id)==0)
{
fprintf(stderr,"Failed to fetching row counter.\n");
fprintf(stderr,"Starting at 0.\n");
id=0;
}
mysql_free_result(res);
}
}
void sql_err(MYSQL* conn,char* query)
{
fprintf(stderr,"Error %u: %s\n",mysql_errno(conn),mysql_error(conn));
if(is_str(query)) fprintf(stderr,"\nQuery =\n\n%s\n\n",query);
exit(EXIT_FAILURE);
}
int is_str(const char* str)
{
if(!str) return(0);
int len;
len=strlen(str);
if(len<1) return(0); // len>=1 is considered a string.
while(--len>=0)
{
if(!isprint(str[len])) return(0);
}
return(1);
}
int is_full_path(const char* path)
{
if(is_str(path))
{
if(path[0]=='/') return(1);
}
return(0);
}
void get_timestamp(time_t t,char *ptr)
{
if(!ptr) exit(EXIT_FAILURE);
if(t==0)
{
t=time(NULL);
if(t==-1) exit(EXIT_FAILURE);
}
if(!strftime(ptr,20,"%Y-%m-%d %T",localtime(&t))) exit(EXIT_FAILURE);
}
char* get_rel_path(const char* path)
{
size_t size;
size=strlen(path)+2;
char *relative_path;
relative_path=malloc(size);
if(!relative_path) exit(EXIT_FAILURE);
strncpy(relative_path,".",size); // path should start with slash here.
strcat(relative_path,path);
return(relative_path);
}
char* get_abs_path(const char* path)
{
size_t size;
size=strlen(path)+strlen(conf.mountpoint)+1;
char *realpath;
realpath=malloc(size);
if(!realpath) exit(EXIT_FAILURE);
strcpy(realpath,conf.mountpoint);
if(realpath[strlen(realpath)-1]=='/') realpath[strlen(realpath)-1]='\0';
strcat(realpath,path);
return(realpath);
}
void get_cfg_str(char* in,char* out,const char* opt,const int out_size)
{
if(in)
{
int opt_len;
opt_len=strlen(opt);
if(!strncmp(in,opt,opt_len))
{
int in_len;
in_len=strlen(in);
if(in_len>opt_len)
{
if(out)
{
in=(char*)&in[opt_len];
in_len=strlen(in);
if(out_size>=in_len)
{
while(--in_len>=0)
{
if(in[in_len]=='\n') in[in_len]='\0';
}
strncpy(out,in,out_size);
}
}
}
}
}
}
void get_cfg_val(char* in,int* out,const char* opt)
{
if(in)
{
int opt_len;
opt_len=strlen(opt);
if(!strncmp(in,opt,opt_len))
{
*out=1;
}
}
}
void exit_gracefull(void)
{
if(errno)
{
char str[512];
memset(str,0,512);
int ret;
ret=strerror_r(errno,str,512);
if(ret!=0) sprintf(str,"Unknown error");
fprintf(stderr,"Sorry the program encountered a problem.\n");
fprintf(stderr,"Error : %s\n",str);
}
fprintf(stdout,"Exiting.\n");
}
/* The following code is copied directly from the fuse api example 'fusexmp.c'. */
/* Additional code is added. */
static int xmp_getattr(const char *path, struct stat *stbuf)
{
if(conf.syscall_getattr) sql_write(path,"status");
int res;
char *rpath;
rpath=get_rel_path(path);
res = lstat(rpath, stbuf);
free(rpath);
if (res == -1)
{
if(conf.syscall_getattr && conf.enable_error_messages) sql_write_err();
return -errno;
}
return 0;
}
static int xmp_access(const char *path, int mask)
{
if(conf.syscall_access) sql_write(path,"access");
int res;
char *rpath;
rpath=get_rel_path(path);
res = access(rpath, mask);
free(rpath);
if (res == -1)
{
if(conf.syscall_access && conf.enable_error_messages) sql_write_err();
return -errno;
}
return 0;
}
static int xmp_readlink(const char *path, char *buf, size_t size)
{
if(conf.syscall_readlink) sql_write(path,"readlink");
int res;
char *rpath;
rpath=get_rel_path(path);
res = readlink(rpath, buf, size - 1);
free(rpath);
if (res == -1)
{
if(conf.syscall_readlink && conf.enable_error_messages) sql_write_err();
return -errno;
}
buf[res] = '\0';
return 0;
}
static int xmp_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
off_t offset, struct fuse_file_info *fi)
{
if(conf.syscall_readdir) sql_write(path,"readdir");
DIR *dp;
struct dirent *de;
(void) offset;
(void) fi;
char *rpath;
rpath=get_rel_path(path);
dp = opendir(rpath);
free(rpath);
if (dp == NULL)
{
if(conf.syscall_readdir && conf.enable_error_messages) sql_write_err();
return -errno;
}
while ((de = readdir(dp)) != NULL) {
struct stat st;
memset(&st, 0, sizeof(st));
st.st_ino = de->d_ino;
st.st_mode = de->d_type << 12;
if (filler(buf, de->d_name, &st, 0))
break;
}
closedir(dp);
return 0;
}
static int xmp_mknod(const char *path, mode_t mode, dev_t rdev)
{
int res;
/* On Linux this could just be 'mknod(path, mode, rdev)' but this
is more portable */
char *rpath;
rpath=get_rel_path(path);
if (S_ISREG(mode))
{
res = open(rpath, O_CREAT | O_EXCL | O_WRONLY, mode);
if (res >= 0)
{
res = close(res);
}
}
else if (S_ISFIFO(mode))
{
res = mkfifo(rpath, mode);
}
else
{
res = mknod(rpath, mode, rdev);
}
if (res == -1)
{
if(conf.syscall_mknod && conf.enable_error_messages) sql_write(path,"mknod");
if(conf.syscall_mknod && conf.enable_error_messages) sql_write_err();
free(rpath);
return -errno;
}
lchown(rpath,fuse_get_context()->uid,fuse_get_context()->gid);
if(conf.syscall_mknod) sql_write(path,"mknod");
free(rpath);
return 0;
}
static int xmp_mkdir(const char *path, mode_t mode)
{
if(conf.syscall_mkdir) sql_write(path,"mkdir");
int res;
char *rpath;
rpath=get_rel_path(path);
res = mkdir(rpath, mode);
if (res == -1)
{
if(conf.syscall_mkdir && conf.enable_error_messages) sql_write_err();
free(rpath);
return -errno;
}
lchown(rpath,fuse_get_context()->uid,fuse_get_context()->gid);
free(rpath);
return 0;
}
static int xmp_unlink(const char *path)
{
if(conf.syscall_unlink) sql_write(path,"unlink");
int res;
char *rpath;
rpath=get_rel_path(path);
res = unlink(rpath);
free(rpath);
if (res == -1)
{
if(conf.syscall_unlink && conf.enable_error_messages) sql_write_err();
return -errno;