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root/i-scream/projects/libstatgrab/src/libstatgrab/process_stats.c

Comparing projects/libstatgrab/src/libstatgrab/process_stats.c (file contents):
Revision 1.58 by pajs, Tue Apr 6 16:29:44 2004 UTC vs.
Revision 1.80 by ats, Sun Nov 7 12:32:24 2004 UTC

#	Line 33 | Line 33
33		#include <stdlib.h>
34		#include <sys/types.h>
35		#include <dirent.h>
36	–	#include <string.h>
36		#endif
37	+	#include <string.h>
38
39		#ifdef SOLARIS
40		#include <procfs.h>
#	Line 51 | Line 51
51		#define MAX_FILE_LENGTH PATH_MAX
52		#endif
53		#ifdef ALLBSD
54	+	#include <errno.h>
55		#include <stdlib.h>
56		#include <sys/param.h>
57		#include <sys/sysctl.h>
#	Line 65 | Line 66
66		#include <limits.h>
67		#if (defined(FREEBSD) && !defined(FREEBSD5)) || defined(DFBSD)
68		#include <kvm.h>
68	–	#include <tools.h>
69		#endif
70		#include <unistd.h>
71		#ifdef NETBSD2
72		#include <sys/lwp.h>
73		#endif
74		#endif
75	+	#ifdef HPUX
76	+	#include <sys/param.h>
77	+	#include <sys/pstat.h>
78	+	#include <unistd.h>
79	+	#define PROCESS_BATCH 30
80	+	#endif
81
82		static void proc_state_init(sg_process_stats *s) {
83		s->process_name = NULL;
#	Line 85 | Line 91 | static void proc_state_destroy(sg_process_stats *s) {
91
92		sg_process_stats *sg_get_process_stats(int *entries){
93		VECTOR_DECLARE_STATIC(proc_state, sg_process_stats, 64,
94	<	proc_state_init, proc_state_destroy);
94	>	proc_state_init, proc_state_destroy);
95		int proc_state_size = 0;
96		sg_process_stats *proc_state_ptr;
97	+	#ifdef HPUX
98	+	struct pst_status pstat_procinfo[PROCESS_BATCH];
99	+	long procidx = 0;
100	+	long long pagesize;
101	+	int num, i;
102	+	#endif
103		#ifdef ALLBSD
104		int mib[4];
105		size_t size;
#	Line 100 | Line 112 | sg_process_stats *sg_get_process_stats(int *entries){
112		int argslen = 0;
113		#else
114		long buflen;
115	<	char *p;
115	>	char *p, *proctitletmp;
116		#endif
117		#ifdef NETBSD2
118		int lwps;
#	Line 108 | Line 120 | sg_process_stats *sg_get_process_stats(int *entries){
120		#endif
121		#endif
122		#if defined(SOLARIS) || defined(LINUX)
123	<	DIR *proc_dir;
124	<	struct dirent *dir_entry;
125	<	char filename[MAX_FILE_LENGTH];
126	<	FILE *f;
123	>	DIR *proc_dir;
124	>	struct dirent *dir_entry;
125	>	char filename[MAX_FILE_LENGTH];
126	>	FILE *f;
127		#ifdef SOLARIS
128		psinfo_t process_info;
129		#endif
#	Line 131 | Line 143 | sg_process_stats *sg_get_process_stats(int *entries){
143
144		#ifdef LINUX
145		if ((f=fopen("/proc/uptime", "r")) == NULL) {
146	+	sg_set_error_with_errno(SG_ERROR_OPEN, "/proc/uptime");
147		return NULL;
148		}
149		if((fscanf(f,"%lu %*d",&uptime)) != 1){
150	+	sg_set_error(SG_ERROR_PARSE, NULL);
151		return NULL;
152		}
153		fclose(f);
154		#endif
155
156	<	if((proc_dir=opendir(PROC_LOCATION))==NULL){
157	<	return NULL;
158	<	}
156	>	if((proc_dir=opendir(PROC_LOCATION))==NULL){
157	>	sg_set_error_with_errno(SG_ERROR_OPENDIR, PROC_LOCATION);
158	>	return NULL;
159	>	}
160
161	<	while((dir_entry=readdir(proc_dir))!=NULL){
162	<	if(atoi(dir_entry->d_name) == 0) continue;
161	>	while((dir_entry=readdir(proc_dir))!=NULL){
162	>	if(atoi(dir_entry->d_name) == 0) continue;
163
164		#ifdef SOLARIS
165	<	snprintf(filename, MAX_FILE_LENGTH, "/proc/%s/psinfo", dir_entry->d_name);
165	>	snprintf(filename, MAX_FILE_LENGTH, "/proc/%s/psinfo", dir_entry->d_name);
166		#endif
167		#ifdef LINUX
168		snprintf(filename, MAX_FILE_LENGTH, "/proc/%s/stat", dir_entry->d_name);
169		#endif
170	<	if((f=fopen(filename, "r"))==NULL){
171	<	/* Open failed.. Process since vanished, or the path was too long.
172	<	* Ah well, move onwards to the next one */
173	<	continue;
174	<	}
170	>	if((f=fopen(filename, "r"))==NULL){
171	>	/* Open failed.. Process since vanished, or the path was too long.
172	>	* Ah well, move onwards to the next one */
173	>	continue;
174	>	}
175		#ifdef SOLARIS
176	<	fread(&process_info, sizeof(psinfo_t), 1, f);
176	>	fread(&process_info, sizeof(psinfo_t), 1, f);
177	>	fclose(f);
178		#endif
179
180		if (VECTOR_RESIZE(proc_state, proc_state_size + 1) < 0) {
#	Line 178 | Line 194 | sg_process_stats *sg_get_process_stats(int *entries){
194		proc_state_ptr->proc_resident = (process_info.pr_rssize) * 1024;
195		proc_state_ptr->time_spent = process_info.pr_time.tv_sec;
196		proc_state_ptr->cpu_percent = (process_info.pr_pctcpu * 100.0) / 0x8000;
197	<	proc_state_ptr->process_name = strdup(process_info.pr_fname);
198	<	proc_state_ptr->proctitle = strdup(process_info.pr_psargs);
197	>	proc_state_ptr->nice = (int)process_info.pr_lwp.pr_nice - 20;
198	>	if (sg_update_string(&proc_state_ptr->process_name,
199	>	process_info.pr_fname) < 0) {
200	>	return NULL;
201	>	}
202	>	if (sg_update_string(&proc_state_ptr->proctitle,
203	>	process_info.pr_psargs) < 0) {
204	>	return NULL;
205	>	}
206
207	<	if(process_info.pr_lwp.pr_state==1) proc_state_ptr->state = SG_PROCESS_STATE_SLEEPING;
208	<	if(process_info.pr_lwp.pr_state==2) proc_state_ptr->state = SG_PROCESS_STATE_RUNNING;
209	<	if(process_info.pr_lwp.pr_state==3) proc_state_ptr->state = SG_PROCESS_STATE_ZOMBIE;
210	<	if(process_info.pr_lwp.pr_state==4) proc_state_ptr->state = SG_PROCESS_STATE_STOPPED;
211	<	if(process_info.pr_lwp.pr_state==6) proc_state_ptr->state = SG_PROCESS_STATE_RUNNING;
207	>	switch (process_info.pr_lwp.pr_state) {
208	>	case 1:
209	>	proc_state_ptr->state = SG_PROCESS_STATE_SLEEPING;
210	>	break;
211	>	case 2:
212	>	case 5:
213	>	proc_state_ptr->state = SG_PROCESS_STATE_RUNNING;
214	>	break;
215	>	case 3:
216	>	proc_state_ptr->state = SG_PROCESS_STATE_ZOMBIE;
217	>	break;
218	>	case 4:
219	>	proc_state_ptr->state = SG_PROCESS_STATE_STOPPED;
220	>	break;
221	>	}
222		#endif
223		#ifdef LINUX
224		x = fscanf(f, "%d %4096s %c %d %d %*d %*d %*d %*u %*u %*u %*u %*u %lu %lu %*d %*d %*d %d %*d %*d %lu %llu %llu %*u %*u %*u %*u %*u %*u %*u %*u %*u %*u %*u %*u %*u %*d %*d\n", &(proc_state_ptr->pid), ps_name, &s, &(proc_state_ptr->parent), &(proc_state_ptr->pgid), &utime, &stime, &(proc_state_ptr->nice), &starttime, &(proc_state_ptr->proc_size), &(proc_state_ptr->proc_resident));
225		/* +3 becuase man page says "Resident  Set Size: number of pages the process has in real memory, minus 3 for administrative purposes." */
226		proc_state_ptr->proc_resident = (proc_state_ptr->proc_resident + 3) * getpagesize();
227	<	if(s == 'S') proc_state_ptr->state = SG_PROCESS_STATE_SLEEPING;
228	<	if(s == 'R') proc_state_ptr->state = SG_PROCESS_STATE_RUNNING;
229	<	if(s == 'Z') proc_state_ptr->state = SG_PROCESS_STATE_ZOMBIE;
230	<	if(s == 'T') proc_state_ptr->state = SG_PROCESS_STATE_STOPPED;
231	<	if(s == 'D') proc_state_ptr->state = SG_PROCESS_STATE_STOPPED;
227	>	switch (s) {
228	>	case 'S':
229	>	proc_state_ptr->state = SG_PROCESS_STATE_SLEEPING;
230	>	break;
231	>	case 'R':
232	>	proc_state_ptr->state = SG_PROCESS_STATE_RUNNING;
233	>	break;
234	>	case 'Z':
235	>	proc_state_ptr->state = SG_PROCESS_STATE_ZOMBIE;
236	>	break;
237	>	case 'T':
238	>	case 'D':
239	>	proc_state_ptr->state = SG_PROCESS_STATE_STOPPED;
240	>	break;
241	>	}
242
243		/* pa_name[0] should = '(' */
244		ptr = strchr(&ps_name[1], ')');
245		if(ptr !=NULL) *ptr='\0';
246
247		if (sg_update_string(&proc_state_ptr->process_name,
248	<	&ps_name[1]) < 0) {
248	>	&ps_name[1]) < 0) {
249		return NULL;
250		}
251
252		/* cpu */
253		proc_state_ptr->cpu_percent = (100.0 * (utime + stime)) / ((uptime * 100.0) - starttime);
211	–	printf("%s  ut: %lu st: %lu up: %lu start: %lu\n", proc_state_ptr->process_name, utime, stime, uptime , starttime);
254
255	<	fclose(f);
255	>	fclose(f);
256
257	+	/* uid / gid */
258	+	snprintf(filename, MAX_FILE_LENGTH, "/proc/%s/status", dir_entry->d_name);
259	+	if ((f=fopen(filename, "r")) == NULL) {
260	+	/* Open failed.. Process since vanished, or the path was too long.
261	+	* Ah well, move onwards to the next one */
262	+	continue;
263	+	}
264	+
265	+	if((ptr=sg_f_read_line(f, "Uid:"))==NULL){
266	+	fclose(f);
267	+	continue;
268	+	}
269	+	sscanf(ptr, "Uid:\t%d\t%d\t%*d\t%*d\n", &(proc_state_ptr->uid), &(proc_state_ptr->euid));
270	+
271	+	if((ptr=sg_f_read_line(f, "Gid:"))==NULL){
272	+	fclose(f);
273	+	continue;
274	+	}
275	+	sscanf(ptr, "Gid:\t%d\t%d\t%*d\t%*d\n", &(proc_state_ptr->gid), &(proc_state_ptr->egid));
276	+
277	+	fclose(f);
278	+
279		/* proctitle */
280		snprintf(filename, MAX_FILE_LENGTH, "/proc/%s/cmdline", dir_entry->d_name);
281
282	<	if((fn=open(filename, O_RDONLY)) == -1){
283	<	/* Open failed.. Process since vanished, or the path was too long.
284	<	* Ah well, move onwards to the next one */
285	<	continue;
286	<	}
282	>	if((fn=open(filename, O_RDONLY)) == -1){
283	>	/* Open failed.. Process since vanished, or the path was too long.
284	>	* Ah well, move onwards to the next one */
285	>	continue;
286	>	}
287
288		#define READ_BLOCK_SIZE 128
289		len = 0;
#	Line 265 | Line 329 | sg_process_stats *sg_get_process_stats(int *entries){
329		#endif
330
331		proc_state_size++;
332	<	}
333	<	closedir(proc_dir);
332	>	}
333	>	closedir(proc_dir);
334		#endif
335
336		#ifdef ALLBSD
#	Line 275 | Line 339 | sg_process_stats *sg_get_process_stats(int *entries){
339		mib[2] = KERN_PROC_ALL;
340
341		if(sysctl(mib, 3, NULL, &size, NULL, 0) < 0) {
342	+	sg_set_error_with_errno(SG_ERROR_SYSCTL,
343	+	"CTL_KERN.KERN_PROC.KERN_PROC_ALL");
344		return NULL;
345		}
346
347		procs = size / sizeof(struct kinfo_proc);
348
349	<	kp_stats = malloc(size);
349	>	kp_stats = sg_malloc(size);
350		if(kp_stats == NULL) {
351		return NULL;
352		}
353		memset(kp_stats, 0, size);
354
355		if(sysctl(mib, 3, kp_stats, &size, NULL, 0) < 0) {
356	+	sg_set_error_with_errno(SG_ERROR_SYSCTL,
357	+	"CTL_KERN.KERN_PROC.KERN_PROC_ALL");
358		free(kp_stats);
359		return NULL;
360		}
#	Line 328 | Line 396 | sg_process_stats *sg_get_process_stats(int *entries){
396		}
397
398		#if defined(FREEBSD5) || defined(NETBSD) || defined(OPENBSD)
331	–	size = sizeof(buflen);
399
400		#ifdef FREEBSD5
334	–	if(sysctlbyname("kern.ps_arg_cache_limit", &buflen, &size, NULL, 0) < 0) {
335	–	return NULL;
336	–	}
337	–	#else
338	–	/* FIXME - this value can be too large on some of
339	–	the BSD's, which causes sysctl not to return
340	–	anything. Maybe we need something smaller? */
341	–	mib[1] = KERN_ARGMAX;
342	–
343	–	if(sysctl(mib, 2, &buflen, &size, NULL, 0) < 0) {
344	–	return NULL;
345	–	}
346	–	#endif
347	–
348	–	proctitle = malloc(buflen);
349	–	if(proctitle == NULL) {
350	–	return NULL;
351	–	}
352	–
353	–	size = buflen;
354	–
355	–	#ifdef FREEBSD5
401		mib[2] = KERN_PROC_ARGS;
402		mib[3] = kp_stats[i].ki_pid;
403		#else
#	Line 362 | Line 407 | sg_process_stats *sg_get_process_stats(int *entries){
407		#endif
408
409		free(proc_state_ptr->proctitle);
410	<	if(sysctl(mib, 4, proctitle, &size, NULL, 0) < 0) {
411	<	free(proctitle);
412	<	proc_state_ptr->proctitle = NULL;
413	<	}
414	<	else if(size > 0) {
415	<	proc_state_ptr->proctitle = malloc(size+1);
410	>	proc_state_ptr->proctitle = NULL;
411	>
412	>	/* Starting size - we'll double this straight away */
413	>	#define PROCTITLE_START_SIZE 64
414	>	buflen = PROCTITLE_START_SIZE;
415	>	size = buflen;
416	>	proctitle = NULL;
417	>
418	>	do {
419	>	if((long) size >= buflen) {
420	>	buflen *= 2;
421	>	size = buflen;
422	>	proctitletmp = sg_realloc(proctitle, buflen);
423	>	if(proctitletmp == NULL) {
424	>	free(proctitle);
425	>	proctitle = NULL;
426	>	proc_state_ptr->proctitle = NULL;
427	>	size = 0;
428	>	break;
429	>	}
430	>	proctitle = proctitletmp;
431	>	bzero(proctitle, buflen);
432	>	}
433	>
434	>	if(sysctl(mib, 4, proctitle, &size, NULL, 0) < 0) {
435	>	free(proctitle);
436	>	proctitle = NULL;
437	>	proc_state_ptr->proctitle = NULL;
438	>	size = 0;
439	>	break;
440	>	}
441	>	} while((long) size >= buflen);
442	>
443	>	if(size > 0) {
444	>	proc_state_ptr->proctitle = sg_malloc(size+1);
445		if(proc_state_ptr->proctitle == NULL) {
446		return NULL;
447		}
448		p = proctitle;
449	+	#ifdef OPENBSD
450	+	/* On OpenBSD, this value has the argv pointers (which
451	+	* are terminated by a NULL) at the front, so we have
452	+	* to skip over them to get to the strings. */
453	+	while (*(char ***)p != NULL) {
454	+	p += sizeof(char **);
455	+	}
456	+	p += sizeof(char **);
457	+	#endif
458		proc_state_ptr->proctitle[0] = '\0';
459		do {
460		sg_strlcat(proc_state_ptr->proctitle, p, size+1);
#	Line 379 | Line 462 | sg_process_stats *sg_get_process_stats(int *entries){
462		p += strlen(p) + 1;
463		} while (p < proctitle + size);
464		free(proctitle);
465	+	proctitle = NULL;
466		/* remove trailing space */
467		proc_state_ptr->proctitle[strlen(proc_state_ptr->proctitle)-1] = '\0';
468		}
469		else {
470	<	free(proctitle);
470	>	if(proctitle != NULL) {
471	>	free(proctitle);
472	>	proctitle = NULL;
473	>	}
474		proc_state_ptr->proctitle = NULL;
475		}
476		#else
477		free(proc_state_ptr->proctitle);
478	+	proc_state_ptr->proctitle = NULL;
479		if(kvmd != NULL) {
480		args = kvm_getargv(kvmd, &(kp_stats[i]), 0);
481		if(args != NULL) {
#	Line 396 | Line 484 | sg_process_stats *sg_get_process_stats(int *entries){
484		argslen += strlen(*argsp) + 1;
485		argsp++;
486		}
487	<	proctitle = malloc(argslen + 1);
487	>	proctitle = sg_malloc(argslen + 1);
488		proctitle[0] = '\0';
489		if(proctitle == NULL) {
490		return NULL;
#	Line 492 | Line 580 | sg_process_stats *sg_get_process_stats(int *entries){
580		mib[4] = 0;
581
582		if(sysctl(mib, 5, NULL, &size, NULL, 0) < 0) {
583	+	sg_set_error_with_errno(SG_ERROR_SYSCTL, "CTL_KERN.KERN_LWP.pid.structsize.0");
584		return NULL;
585		}
586
587		lwps = size / sizeof(struct kinfo_lwp);
588		mib[4] = lwps;
589
590	<	kl_stats = malloc(size);
590	>	kl_stats = sg_malloc(size);
591		if(kl_stats == NULL) {
592		return NULL;
593		}
594
595		if(sysctl(mib, 5, kl_stats, &size, NULL, 0) < 0) {
596	+	sg_set_error_with_errno(SG_ERROR_SYSCTL, "CTL_KERN.KERN_LWP.pid.structsize.buffersize");
597		return NULL;
598		}
599		}
#	Line 545 | Line 635 | sg_process_stats *sg_get_process_stats(int *entries){
635		proc_state_ptr->state = SG_PROCESS_STATE_UNKNOWN;
636		break;
637		}
638	+
639	+	free(kl_stats);
640		#else
641		#ifdef FREEBSD5
642		switch (kp_stats[i].ki_stat) {
#	Line 587 | Line 679 | sg_process_stats *sg_get_process_stats(int *entries){
679		free(kp_stats);
680		#endif
681
682	+	#ifdef HPUX
683	+	if ((pagesize = sysconf(_SC_PAGESIZE)) == -1) {
684	+	sg_set_error_with_errno(SG_ERROR_SYSCONF, "_SC_PAGESIZE");
685	+	return NULL;
686	+	}
687	+
688	+	while (1) {
689	+	num = pstat_getproc(pstat_procinfo, sizeof pstat_procinfo[0],
690	+	PROCESS_BATCH, procidx);
691	+	if (num == -1) {
692	+	sg_set_error_with_errno(SG_ERROR_PSTAT,
693	+	"pstat_getproc");
694	+	return NULL;
695	+	} else if (num == 0) {
696	+	break;
697	+	}
698	+
699	+	for (i = 0; i < num; i++) {
700	+	struct pst_status *pi = &pstat_procinfo[i];
701	+
702	+	if (VECTOR_RESIZE(proc_state, proc_state_size + 1) < 0) {
703	+	return NULL;
704	+	}
705	+	proc_state_ptr = proc_state+proc_state_size;
706	+
707	+	proc_state_ptr->pid = pi->pst_pid;
708	+	proc_state_ptr->parent = pi->pst_ppid;
709	+	proc_state_ptr->pgid = pi->pst_pgrp;
710	+	proc_state_ptr->uid = pi->pst_uid;
711	+	proc_state_ptr->euid = pi->pst_euid;
712	+	proc_state_ptr->gid = pi->pst_gid;
713	+	proc_state_ptr->egid = pi->pst_egid;
714	+	proc_state_ptr->proc_size = (pi->pst_dsize + pi->pst_tsize + pi->pst_ssize) * pagesize;
715	+	proc_state_ptr->proc_resident = pi->pst_rssize * pagesize;
716	+	proc_state_ptr->time_spent = pi->pst_time;
717	+	proc_state_ptr->cpu_percent = (pi->pst_pctcpu * 100.0) / 0x8000;
718	+	proc_state_ptr->nice = pi->pst_nice;
719	+
720	+	if (sg_update_string(&proc_state_ptr->process_name,
721	+	pi->pst_ucomm) < 0) {
722	+	return NULL;
723	+	}
724	+	if (sg_update_string(&proc_state_ptr->proctitle,
725	+	pi->pst_cmd) < 0) {
726	+	return NULL;
727	+	}
728	+
729	+	switch (pi->pst_stat) {
730	+	case PS_SLEEP:
731	+	proc_state_ptr->state = SG_PROCESS_STATE_SLEEPING;
732	+	break;
733	+	case PS_RUN:
734	+	proc_state_ptr->state = SG_PROCESS_STATE_RUNNING;
735	+	break;
736	+	case PS_STOP:
737	+	proc_state_ptr->state = SG_PROCESS_STATE_STOPPED;
738	+	break;
739	+	case PS_ZOMBIE:
740	+	proc_state_ptr->state = SG_PROCESS_STATE_ZOMBIE;
741	+	break;
742	+	case PS_IDLE:
743	+	case PS_OTHER:
744	+	proc_state_ptr->state = SG_PROCESS_STATE_UNKNOWN;
745	+	break;
746	+	}
747	+
748	+	proc_state_size++;
749	+	}
750	+	procidx = pstat_procinfo[num - 1].pst_idx + 1;
751	+	}
752	+	#endif
753	+
754		#ifdef CYGWIN
755	+	sg_set_error(SG_ERROR_UNSUPPORTED, "Cygwin");
756		return NULL;
757		#endif
758
#	Line 637 | Line 802 | sg_process_count *sg_get_process_count() {
802
803		return &process_stat;
804		}
805	+
806	+	int sg_process_compare_name(const void *va, const void *vb) {
807	+	const sg_process_stats *a = (sg_process_stats *)va;
808	+	const sg_process_stats *b = (sg_process_stats *)vb;
809	+
810	+	return strcmp(a->process_name, b->process_name);
811	+	}
812	+
813	+	int sg_process_compare_pid(const void *va, const void *vb) {
814	+	const sg_process_stats *a = (sg_process_stats *)va;
815	+	const sg_process_stats *b = (sg_process_stats *)vb;
816	+
817	+	if (a->pid < b->pid) {
818	+	return -1;
819	+	} else if (a->pid == b->pid) {
820	+	return 0;
821	+	} else {
822	+	return 1;
823	+	}
824	+	}
825	+
826	+	int sg_process_compare_uid(const void *va, const void *vb) {
827	+	const sg_process_stats *a = (sg_process_stats *)va;
828	+	const sg_process_stats *b = (sg_process_stats *)vb;
829	+
830	+	if (a->uid < b->uid) {
831	+	return -1;
832	+	} else if (a->uid == b->uid) {
833	+	return 0;
834	+	} else {
835	+	return 1;
836	+	}
837	+	}
838	+
839	+	int sg_process_compare_gid(const void *va, const void *vb) {
840	+	const sg_process_stats *a = (sg_process_stats *)va;
841	+	const sg_process_stats *b = (sg_process_stats *)vb;
842	+
843	+	if (a->gid < b->gid) {
844	+	return -1;
845	+	} else if (a->gid == b->gid) {
846	+	return 0;
847	+	} else {
848	+	return 1;
849	+	}
850	+	}
851	+
852	+	int sg_process_compare_size(const void *va, const void *vb) {
853	+	const sg_process_stats *a = (sg_process_stats *)va;
854	+	const sg_process_stats *b = (sg_process_stats *)vb;
855	+
856	+	if (a->proc_size < b->proc_size) {
857	+	return -1;
858	+	} else if (a->proc_size == b->proc_size) {
859	+	return 0;
860	+	} else {
861	+	return 1;
862	+	}
863	+	}
864	+
865	+	int sg_process_compare_res(const void *va, const void *vb) {
866	+	const sg_process_stats *a = (sg_process_stats *)va;
867	+	const sg_process_stats *b = (sg_process_stats *)vb;
868	+
869	+	if (a->proc_resident < b->proc_resident) {
870	+	return -1;
871	+	} else if (a->proc_resident == b->proc_resident) {
872	+	return 0;
873	+	} else {
874	+	return 1;
875	+	}
876	+	}
877	+
878	+	int sg_process_compare_cpu(const void *va, const void *vb) {
879	+	const sg_process_stats *a = (sg_process_stats *)va;
880	+	const sg_process_stats *b = (sg_process_stats *)vb;
881	+
882	+	if (a->cpu_percent < b->cpu_percent) {
883	+	return -1;
884	+	} else if (a->cpu_percent == b->cpu_percent) {
885	+	return 0;
886	+	} else {
887	+	return 1;
888	+	}
889	+	}
890	+
891	+	int sg_process_compare_time(const void *va, const void *vb) {
892	+	const sg_process_stats *a = (sg_process_stats *)va;
893	+	const sg_process_stats *b = (sg_process_stats *)vb;
894	+
895	+	if (a->time_spent < b->time_spent) {
896	+	return -1;
897	+	} else if (a->time_spent == b->time_spent) {
898	+	return 0;
899	+	} else {
900	+	return 1;
901	+	}
902	+	}
903	+

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