Annotation of src/usr.bin/tmux/procname.c, Revision 1.17
1.17 ! nicm 1: /* $OpenBSD: procname.c,v 1.16 2016/10/10 21:29:23 nicm Exp $ */
1.1 nicm 2:
3: /*
1.15 nicm 4: * Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>
1.1 nicm 5: *
6: * Permission to use, copy, modify, and distribute this software for any
7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
9: *
10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15: * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16: * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17: */
18:
1.14 deraadt 19: #include <sys/param.h> /* MAXCOMLEN */
20: #include <sys/types.h>
1.10 millert 21: #include <sys/proc.h>
1.1 nicm 22: #include <sys/sysctl.h>
23: #include <sys/stat.h>
24:
25: #include <errno.h>
26: #include <stdlib.h>
27: #include <string.h>
28: #include <unistd.h>
29:
1.2 nicm 30: #ifndef nitems
1.1 nicm 31: #define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
1.2 nicm 32: #endif
1.1 nicm 33:
34: #define is_runnable(p) \
35: ((p)->p_stat == SRUN || (p)->p_stat == SIDL || (p)->p_stat == SONPROC)
36: #define is_stopped(p) \
1.13 guenther 37: ((p)->p_stat == SSTOP || (p)->p_stat == SDEAD)
1.1 nicm 38:
1.16 nicm 39: static struct kinfo_proc *cmp_procs(struct kinfo_proc *, struct kinfo_proc *);
40: char *get_proc_name(int, char *);
1.17 ! nicm 41: char *get_proc_cwd(int);
1.4 nicm 42:
1.16 nicm 43: static struct kinfo_proc *
1.7 guenther 44: cmp_procs(struct kinfo_proc *p1, struct kinfo_proc *p2)
1.4 nicm 45: {
46: if (is_runnable(p1) && !is_runnable(p2))
47: return (p1);
48: if (!is_runnable(p1) && is_runnable(p2))
49: return (p2);
50:
51: if (is_stopped(p1) && !is_stopped(p2))
52: return (p1);
53: if (!is_stopped(p1) && is_stopped(p2))
54: return (p2);
55:
56: if (p1->p_estcpu > p2->p_estcpu)
57: return (p1);
58: if (p1->p_estcpu < p2->p_estcpu)
59: return (p2);
60:
61: if (p1->p_slptime < p2->p_slptime)
62: return (p1);
63: if (p1->p_slptime > p2->p_slptime)
64: return (p2);
65:
66: if ((p1->p_flag & P_SINTR) && !(p2->p_flag & P_SINTR))
67: return (p1);
68: if (!(p1->p_flag & P_SINTR) && (p2->p_flag & P_SINTR))
69: return (p2);
70:
71: if (strcmp(p1->p_comm, p2->p_comm) < 0)
72: return (p1);
73: if (strcmp(p1->p_comm, p2->p_comm) > 0)
74: return (p2);
75:
76: if (p1->p_pid > p2->p_pid)
77: return (p1);
78: return (p2);
79: }
1.1 nicm 80:
81: char *
82: get_proc_name(int fd, char *tty)
83: {
1.7 guenther 84: int mib[6] = { CTL_KERN, KERN_PROC, KERN_PROC_PGRP, 0,
85: sizeof(struct kinfo_proc), 0 };
1.1 nicm 86: struct stat sb;
87: size_t len;
1.7 guenther 88: struct kinfo_proc *buf, *newbuf, *bestp;
1.1 nicm 89: u_int i;
90: char *name;
91:
92: buf = NULL;
93:
94: if (stat(tty, &sb) == -1)
95: return (NULL);
96: if ((mib[3] = tcgetpgrp(fd)) == -1)
97: return (NULL);
98:
99: retry:
100: if (sysctl(mib, nitems(mib), NULL, &len, NULL, 0) == -1)
1.12 nicm 101: goto error;
1.1 nicm 102: len = (len * 5) / 4;
103:
1.4 nicm 104: if ((newbuf = realloc(buf, len)) == NULL)
105: goto error;
1.1 nicm 106: buf = newbuf;
107:
1.7 guenther 108: mib[5] = (int)(len / sizeof(struct kinfo_proc));
1.1 nicm 109: if (sysctl(mib, nitems(mib), buf, &len, NULL, 0) == -1) {
110: if (errno == ENOMEM)
111: goto retry;
1.4 nicm 112: goto error;
1.1 nicm 113: }
114:
115: bestp = NULL;
1.7 guenther 116: for (i = 0; i < len / sizeof (struct kinfo_proc); i++) {
1.6 guenther 117: if ((dev_t)buf[i].p_tdev != sb.st_rdev)
1.1 nicm 118: continue;
1.4 nicm 119: if (bestp == NULL)
1.6 guenther 120: bestp = &buf[i];
1.4 nicm 121: else
1.6 guenther 122: bestp = cmp_procs(&buf[i], bestp);
1.1 nicm 123: }
124:
125: name = NULL;
126: if (bestp != NULL)
127: name = strdup(bestp->p_comm);
128:
129: free(buf);
130: return (name);
1.4 nicm 131:
132: error:
133: free(buf);
134: return (NULL);
1.17 ! nicm 135: }
! 136:
! 137: char *
! 138: get_proc_cwd(int fd)
! 139: {
! 140: int name[] = { CTL_KERN, KERN_PROC_CWD, 0 };
! 141: static char path[MAXPATHLEN];
! 142: size_t pathlen = sizeof path;
! 143:
! 144: if ((name[2] = tcgetpgrp(fd)) == -1)
! 145: return (NULL);
! 146: if (sysctl(name, 3, path, &pathlen, NULL, 0) != 0)
! 147: return (NULL);
! 148: return (path);
1.1 nicm 149: }
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