3
4#include <sys/types.h>
5#include <sys/user.h>
6#include <sys/sysctl.h>
7#include <stdlib.h>
8#include <string.h>
9
10#include "libutil.h"
11
12struct kinfo_file *
13kinfo_getfile(pid_t pid, int *cntp)
14{
15 int mib[4];
16 int error;
17 int cnt;
18 size_t len;
19 char *buf, *bp, *eb;
20 struct kinfo_file *kif, *kp, *kf;
21
22 len = 0;
23 mib[0] = CTL_KERN;
24 mib[1] = KERN_PROC;
25 mib[2] = KERN_PROC_FILEDESC;
26 mib[3] = pid;
27
28 error = sysctl(mib, 4, NULL, &len, NULL, 0);
29 if (error)
30 return (0);
31 len = len * 4 / 3;
32 buf = malloc(len);
33 if (buf == NULL)
34 return (0);
35 error = sysctl(mib, 4, buf, &len, NULL, 0);
36 if (error) {
37 free(buf);
38 return (0);
39 }
40 /* Pass 1: count items */
41 cnt = 0;
42 bp = buf;
43 eb = buf + len;
44 while (bp < eb) {
45 kf = (struct kinfo_file *)bp;
46 bp += kf->kf_structsize;
47 cnt++;
48 }
49
50 kif = calloc(cnt, sizeof(*kif));
51 if (kif == NULL) {
52 free(buf);
53 return (0);
54 }
55 bp = buf;
56 eb = buf + len;
57 kp = kif;
58 /* Pass 2: unpack */
59 while (bp < eb) {
60 kf = (struct kinfo_file *)bp;
61 /* Copy/expand into pre-zeroed buffer */
62 memcpy(kp, kf, kf->kf_structsize);
63 /* Advance to next packed record */
64 bp += kf->kf_structsize;
65 /* Set field size to fixed length, advance */
66 kp->kf_structsize = sizeof(*kp);
67 kp++;
68 }
69 free(buf);
70 *cntp = cnt;
71 return (kif); /* Caller must free() return value */
72}
| 3
4#include <sys/types.h>
5#include <sys/user.h>
6#include <sys/sysctl.h>
7#include <stdlib.h>
8#include <string.h>
9
10#include "libutil.h"
11
12struct kinfo_file *
13kinfo_getfile(pid_t pid, int *cntp)
14{
15 int mib[4];
16 int error;
17 int cnt;
18 size_t len;
19 char *buf, *bp, *eb;
20 struct kinfo_file *kif, *kp, *kf;
21
22 len = 0;
23 mib[0] = CTL_KERN;
24 mib[1] = KERN_PROC;
25 mib[2] = KERN_PROC_FILEDESC;
26 mib[3] = pid;
27
28 error = sysctl(mib, 4, NULL, &len, NULL, 0);
29 if (error)
30 return (0);
31 len = len * 4 / 3;
32 buf = malloc(len);
33 if (buf == NULL)
34 return (0);
35 error = sysctl(mib, 4, buf, &len, NULL, 0);
36 if (error) {
37 free(buf);
38 return (0);
39 }
40 /* Pass 1: count items */
41 cnt = 0;
42 bp = buf;
43 eb = buf + len;
44 while (bp < eb) {
45 kf = (struct kinfo_file *)bp;
46 bp += kf->kf_structsize;
47 cnt++;
48 }
49
50 kif = calloc(cnt, sizeof(*kif));
51 if (kif == NULL) {
52 free(buf);
53 return (0);
54 }
55 bp = buf;
56 eb = buf + len;
57 kp = kif;
58 /* Pass 2: unpack */
59 while (bp < eb) {
60 kf = (struct kinfo_file *)bp;
61 /* Copy/expand into pre-zeroed buffer */
62 memcpy(kp, kf, kf->kf_structsize);
63 /* Advance to next packed record */
64 bp += kf->kf_structsize;
65 /* Set field size to fixed length, advance */
66 kp->kf_structsize = sizeof(*kp);
67 kp++;
68 }
69 free(buf);
70 *cntp = cnt;
71 return (kif); /* Caller must free() return value */
72}
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