plugins/freebsd/freebsd.c

#include <stdio.h>
#include "ukcprog.h"
#include <sys/param.h>
#include <sys/ucred.h>
#include <sys/mount.h>
#include <string.h>
#include <stdlib.h>
#include <sys/utsname.h>
#include <sys/types.h>
#include <utmp.h>
#include <sys/dkstat.h>
#include <kvm.h>
#include <unistd.h>
#include <sys/sysctl.h>
#include <fcntl.h>
#include <limits.h>

uid_t uid;
uid_t euid;
gid_t gid;
gid_t egid;

void die(){
  exit(1);
}

void diskStats(){
  struct statfs *mp;
  int nummnt;
  int counter=0;
  char *mntpnt;
  char *devicename;

  nummnt=getmntinfo(&mp , MNT_LOCAL);
  if (nummnt<=0){
    errf("Failed to get disk stats (%m)");
    die();
  }

  mntpnt=malloc(MNAMELEN);
  devicename=malloc(MNAMELEN);
  
  for(;counter<nummnt;counter++){
    strncpy(mntpnt, mp->f_mntonname ,MNAMELEN); 
    strncpy(devicename, mp->f_mntfromname ,MNAMELEN); 
    printf("packet.disk.p%d.attributes.mount %s\n", counter, mntpnt);
    printf("packet.disk.p%d.attributes.name %s\n", counter, devicename);
    printf("packet.disk.p%d.attributes.kbytes %lu\n",counter, ((mp->f_bsize/1024) * mp->f_blocks));
    printf("packet.disk.p%d.attributes.used %lu\n",counter, (((mp->f_bsize/1024) * mp->f_blocks) -((mp->f_bsize/1024) * mp->f_bfree)));
    printf("packet.disk.p%d.attributes.avail %lu\n",counter, (mp->f_bsize/1024) * mp->f_bavail);
    printf("packet.disk.p%d.attributes.totalinodes %lu\n", counter, mp->f_files);
    printf("packet.disk.p%d.attributes.freeinodes %lu\n",counter, mp->f_ffree);

    mp++;
  }
  

}

void osStats(){
  struct utsname os;

  if((uname(&os)) != 0){
    errf("Failed to get os stats (%m)");
    die();
  }
  
  printf("packet.os.name %s\n", os.sysname);
  printf("packet.os.release %s\n" , os.release);
  printf("packet.os.version %s\n", os.version);
  printf("packet.os.sysname %s\n" , os.nodename);
  printf("packet.os.platform %s\n", os.machine);
  
}
void loadStats(){
  double loadav[3];
  
  if((getloadavg(loadav,3)) == -1){
    errf("Failed to get load averages (%m)");
    die();    
  }
  
  printf("packet.load.load1 %.2f\n",loadav[0]);
  printf("packet.load.load5 %.2f\n",loadav[1]);
  printf("packet.load.load15 %.2f\n",loadav[2]);
}

void userStats(){
  struct utmp users;
  FILE *f;
  int numusers=0;

  if ((f=fopen(_PATH_UTMP, "r")) == NULL){
    errf("Failed to get user stats(%m)");
    die();
  }

  printf("packet.users.list");

  while((fread(&users, sizeof(users),1,f)) != 0){
    if (users.ut_name[0] == '\0') continue;
    printf(" %s",users.ut_name);
    numusers++;
  }

  printf("\npacket.users.count %d\n",numusers);

}

void systemStats(){

  long cp_time[CPUSTATES];
  long total, user, idle, kernel, nice;
  long totalmem, freemem, swaptotal, swapused;

  static char *cpname = "kern.cp_time";
  static char *tmemname = "hw.physmem";
  static char *fmemname = "vm.stats.vm.v_free_count";
  int pagesize=-1;
  size_t size;

  kvm_t *kvmd = NULL;
  struct kvm_swap swapinfo;
  char errbuf[_POSIX2_LINE_MAX];
  
  if (sysctlbyname(cpname, NULL, &size, NULL, NULL) < 0){
    errf("sysctlbyname (%m)");
    die();
  }

  if (size != sizeof cp_time){
    errf("bailing out, trying to write into something to small");
    die();
  }

  if (sysctlbyname(cpname, &cp_time, &size, NULL, NULL) < 0){
    errf("Failed to get cpu stats (%m)");
    die();
  }

  user=cp_time[CP_USER];
  nice=cp_time[CP_NICE];
  kernel=cp_time[CP_SYS];
  idle=cp_time[CP_IDLE];

  sleep(1);

  if (sysctlbyname(cpname, &cp_time, &size, NULL, NULL) < 0){
    errf("Failed to get cpu stats (%m)");
    die();
  }
  
  user-=cp_time[CP_USER];
  nice-=cp_time[CP_NICE];
  kernel-=cp_time[CP_SYS];
  idle-=cp_time[CP_IDLE];
  
  total=user+nice+kernel+idle;

  printf("packet.cpu.user %ld\n",((user+nice)*100)/total);
  printf("packet.cpu.kernel %ld\n",(kernel*100)/total);
  printf("packet.cpu.idle %ld\n",(idle*100)/total);
 
   /* Cos i-scream's expects this to be sent :/ */
  printf("packet.cpu.iowait 0\n");
  printf("packet.cpu.swap 0\n");
   
  /* MEMORY STATS */
  pagesize=getpagesize();
  if (pagesize==-1){
    errf("Failed to get pagesize (%m)");
    die();
  }

  if (sysctlbyname(tmemname, NULL, &size, NULL, NULL) < 0){
      errf("sysctlbyname (%m)");
      die();
    }

  if (sysctlbyname(tmemname, &totalmem, &size, NULL, NULL) < 0){
    errf("Failed to get memory stats (%m)");
    die();
  }

   if (sysctlbyname(fmemname, NULL, &size, NULL, NULL) < 0){
      errf("sysctlbyname (%m)");
      die();
    }

  if (sysctlbyname(fmemname, &freemem, &size, NULL, NULL) < 0){
    errf("Failed to get memory stats (%m)");
    die();
  }
  
  totalmem/=(1024*1024);
  freemem=(freemem*pagesize)/(1024*1024);
  
  printf("packet.memory.total %ld\n", totalmem);
  printf("packet.memory.free %ld\n", freemem);
  printf("packet.memory.used %ld\n", (totalmem-freemem));

  /* Swap stats */

  /* Get sufficent privilages to do this */
  if (gid!=egid){
    /* Means we are setgid something, hopefully kmem :) */
    if ((setegid(egid)) != 0){
      errf("Failed to gain sufficent privilages (%m)");
      die();
    }
  }

  kvmd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf);
  if (kvmd == NULL){
    errf("Failed to open kvm info to get swap stats (%m)");
    die();
  }
  
  /* Lose are setgid'ness */

  if ((setegid(gid)) != 0){
    errf("Failed to release permissions, refusing to keep setgid. (%m)");
    die();
  }


  /* ok, just for proof of concept atm, ideally this will need to handle more 
     than one swap device */

  if ((kvm_getswapinfo(kvmd, &swapinfo, 1,0)) == -1){
    errf("Failed to get swap info (%m)");
    die();
  }
  
  swaptotal=((((long)swapinfo.ksw_total)*pagesize)/1024)/1024;
  swapused=((((long)swapinfo.ksw_used)*pagesize)/1024)/1024;

  printf("packet.swap.total %ld\n" , swaptotal);
  printf("packet.swap.used %ld\n", swapused);
  printf("packet.swap.free %lu\n", (swaptotal-swapused));
  
}

int main(){
  uid=getuid();
  euid=geteuid();
  gid=getgid();
  egid=getegid();

  /* We dont want to run with more permissions than we need, until we need em */
  if ((setegid(gid)) != 0){
    errf("Failed to release permissions, refusing to keep setgid. (%m)");
    die();
  }

 if ((seteuid(uid)) != 0){
    errf("Failed to release permissions, refusing to keep setuid. (%m)");
    die();
  }

  diskStats();
  osStats();
  loadStats();
  userStats();
  systemStats();
  exit(0);
}
Revision:	1.5
Committed:	Thu Mar 28 17:46:52 2002 UTC (23 years, 8 months ago) by pajs
Content type:	text/plain
Branch:	MAIN
Changes since 1.4:	+15 -3 lines
Log Message:	Added a few more highly unlikely to happen, but check anyway, security checks.
#	Content
1	#include <stdio.h>
2	#include "ukcprog.h"
3	#include <sys/param.h>
4	#include <sys/ucred.h>
5	#include <sys/mount.h>
6	#include <string.h>
7	#include <stdlib.h>
8	#include <sys/utsname.h>
9	#include <sys/types.h>
10	#include <utmp.h>
11	#include <sys/dkstat.h>
12	#include <kvm.h>
13	#include <unistd.h>
14	#include <sys/sysctl.h>
15	#include <fcntl.h>
16	#include <limits.h>
17
18	uid_t uid;
19	uid_t euid;
20	gid_t gid;
21	gid_t egid;
22
23	void die(){
24	exit(1);
25	}
26
27	void diskStats(){
28	struct statfs *mp;
29	int nummnt;
30	int counter=0;
31	char *mntpnt;
32	char *devicename;
33
34	nummnt=getmntinfo(&mp , MNT_LOCAL);
35	if (nummnt<=0){
36	errf("Failed to get disk stats (%m)");
37	die();
38	}
39
40	mntpnt=malloc(MNAMELEN);
41	devicename=malloc(MNAMELEN);
42
43	for(;counter<nummnt;counter++){
44	strncpy(mntpnt, mp->f_mntonname ,MNAMELEN);
45	strncpy(devicename, mp->f_mntfromname ,MNAMELEN);
46	printf("packet.disk.p%d.attributes.mount %s\n", counter, mntpnt);
47	printf("packet.disk.p%d.attributes.name %s\n", counter, devicename);
48	printf("packet.disk.p%d.attributes.kbytes %lu\n",counter, ((mp->f_bsize/1024) * mp->f_blocks));
49	printf("packet.disk.p%d.attributes.used %lu\n",counter, (((mp->f_bsize/1024) * mp->f_blocks) -((mp->f_bsize/1024) * mp->f_bfree)));
50	printf("packet.disk.p%d.attributes.avail %lu\n",counter, (mp->f_bsize/1024) * mp->f_bavail);
51	printf("packet.disk.p%d.attributes.totalinodes %lu\n", counter, mp->f_files);
52	printf("packet.disk.p%d.attributes.freeinodes %lu\n",counter, mp->f_ffree);
53
54	mp++;
55	}
56
57
58	}
59
60	void osStats(){
61	struct utsname os;
62
63	if((uname(&os)) != 0){
64	errf("Failed to get os stats (%m)");
65	die();
66	}
67
68	printf("packet.os.name %s\n", os.sysname);
69	printf("packet.os.release %s\n" , os.release);
70	printf("packet.os.version %s\n", os.version);
71	printf("packet.os.sysname %s\n" , os.nodename);
72	printf("packet.os.platform %s\n", os.machine);
73
74	}
75	void loadStats(){
76	double loadav[3];
77
78	if((getloadavg(loadav,3)) == -1){
79	errf("Failed to get load averages (%m)");
80	die();
81	}
82
83	printf("packet.load.load1 %.2f\n",loadav[0]);
84	printf("packet.load.load5 %.2f\n",loadav[1]);
85	printf("packet.load.load15 %.2f\n",loadav[2]);
86	}
87
88	void userStats(){
89	struct utmp users;
90	FILE *f;
91	int numusers=0;
92
93	if ((f=fopen(_PATH_UTMP, "r")) == NULL){
94	errf("Failed to get user stats(%m)");
95	die();
96	}
97
98	printf("packet.users.list");
99
100	while((fread(&users, sizeof(users),1,f)) != 0){
101	if (users.ut_name[0] == '\0') continue;
102	printf(" %s",users.ut_name);
103	numusers++;
104	}
105
106	printf("\npacket.users.count %d\n",numusers);
107
108	}
109
110	void systemStats(){
111
112	long cp_time[CPUSTATES];
113	long total, user, idle, kernel, nice;
114	long totalmem, freemem, swaptotal, swapused;
115
116	static char *cpname = "kern.cp_time";
117	static char *tmemname = "hw.physmem";
118	static char *fmemname = "vm.stats.vm.v_free_count";
119	int pagesize=-1;
120	size_t size;
121
122	kvm_t *kvmd = NULL;
123	struct kvm_swap swapinfo;
124	char errbuf[_POSIX2_LINE_MAX];
125
126	if (sysctlbyname(cpname, NULL, &size, NULL, NULL) < 0){
127	errf("sysctlbyname (%m)");
128	die();
129	}
130
131	if (size != sizeof cp_time){
132	errf("bailing out, trying to write into something to small");
133	die();
134	}
135
136	if (sysctlbyname(cpname, &cp_time, &size, NULL, NULL) < 0){
137	errf("Failed to get cpu stats (%m)");
138	die();
139	}
140
141	user=cp_time[CP_USER];
142	nice=cp_time[CP_NICE];
143	kernel=cp_time[CP_SYS];
144	idle=cp_time[CP_IDLE];
145
146	sleep(1);
147
148	if (sysctlbyname(cpname, &cp_time, &size, NULL, NULL) < 0){
149	errf("Failed to get cpu stats (%m)");
150	die();
151	}
152
153	user-=cp_time[CP_USER];
154	nice-=cp_time[CP_NICE];
155	kernel-=cp_time[CP_SYS];
156	idle-=cp_time[CP_IDLE];
157
158	total=user+nice+kernel+idle;
159
160	printf("packet.cpu.user %ld\n",((user+nice)*100)/total);
161	printf("packet.cpu.kernel %ld\n",(kernel*100)/total);
162	printf("packet.cpu.idle %ld\n",(idle*100)/total);
163
164	/* Cos i-scream's expects this to be sent :/ */
165	printf("packet.cpu.iowait 0\n");
166	printf("packet.cpu.swap 0\n");
167
168	/* MEMORY STATS */
169	pagesize=getpagesize();
170	if (pagesize==-1){
171	errf("Failed to get pagesize (%m)");
172	die();
173	}
174
175	if (sysctlbyname(tmemname, NULL, &size, NULL, NULL) < 0){
176	errf("sysctlbyname (%m)");
177	die();
178	}
179
180	if (sysctlbyname(tmemname, &totalmem, &size, NULL, NULL) < 0){
181	errf("Failed to get memory stats (%m)");
182	die();
183	}
184
185	if (sysctlbyname(fmemname, NULL, &size, NULL, NULL) < 0){
186	errf("sysctlbyname (%m)");
187	die();
188	}
189
190	if (sysctlbyname(fmemname, &freemem, &size, NULL, NULL) < 0){
191	errf("Failed to get memory stats (%m)");
192	die();
193	}
194
195	totalmem/=(1024*1024);
196	freemem=(freemempagesize)/(10241024);
197
198	printf("packet.memory.total %ld\n", totalmem);
199	printf("packet.memory.free %ld\n", freemem);
200	printf("packet.memory.used %ld\n", (totalmem-freemem));
201
202	/* Swap stats */
203
204	/* Get sufficent privilages to do this */
205	if (gid!=egid){
206	/* Means we are setgid something, hopefully kmem :) */
207	if ((setegid(egid)) != 0){
208	errf("Failed to gain sufficent privilages (%m)");
209	die();
210	}
211	}
212
213	kvmd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf);
214	if (kvmd == NULL){
215	errf("Failed to open kvm info to get swap stats (%m)");
216	die();
217	}
218
219	/* Lose are setgid'ness */
220
221	if ((setegid(gid)) != 0){
222	errf("Failed to release permissions, refusing to keep setgid. (%m)");
223	die();
224	}
225
226
227	/* ok, just for proof of concept atm, ideally this will need to handle more
228	than one swap device */
229
230	if ((kvm_getswapinfo(kvmd, &swapinfo, 1,0)) == -1){
231	errf("Failed to get swap info (%m)");
232	die();
233	}
234
235	swaptotal=((((long)swapinfo.ksw_total)*pagesize)/1024)/1024;
236	swapused=((((long)swapinfo.ksw_used)*pagesize)/1024)/1024;
237
238	printf("packet.swap.total %ld\n" , swaptotal);
239	printf("packet.swap.used %ld\n", swapused);
240	printf("packet.swap.free %lu\n", (swaptotal-swapused));
241
242	}
243
244	int main(){
245	uid=getuid();
246	euid=geteuid();
247	gid=getgid();
248	egid=getegid();
249
250	/* We dont want to run with more permissions than we need, until we need em */
251	if ((setegid(gid)) != 0){
252	errf("Failed to release permissions, refusing to keep setgid. (%m)");
253	die();
254	}
255
256	if ((seteuid(uid)) != 0){
257	errf("Failed to release permissions, refusing to keep setuid. (%m)");
258	die();
259	}
260
261	diskStats();
262	osStats();
263	loadStats();
264	userStats();
265	systemStats();
266	exit(0);
267	}