Annotation of src/usr.bin/tmux/procname.c, Revision 1.19
1.19 ! deraadt 1: /* $OpenBSD: procname.c,v 1.18 2021/12/07 00:38:42 deraadt 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>
1.19 ! deraadt 21: #include <sys/signal.h>
1.10 millert 22: #include <sys/proc.h>
1.1 nicm 23: #include <sys/sysctl.h>
24: #include <sys/stat.h>
25:
26: #include <errno.h>
27: #include <stdlib.h>
28: #include <string.h>
29: #include <unistd.h>
30:
1.2 nicm 31: #ifndef nitems
1.1 nicm 32: #define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
1.2 nicm 33: #endif
1.1 nicm 34:
35: #define is_runnable(p) \
36: ((p)->p_stat == SRUN || (p)->p_stat == SIDL || (p)->p_stat == SONPROC)
37: #define is_stopped(p) \
1.13 guenther 38: ((p)->p_stat == SSTOP || (p)->p_stat == SDEAD)
1.1 nicm 39:
1.16 nicm 40: static struct kinfo_proc *cmp_procs(struct kinfo_proc *, struct kinfo_proc *);
41: char *get_proc_name(int, char *);
1.17 nicm 42: char *get_proc_cwd(int);
1.4 nicm 43:
1.16 nicm 44: static struct kinfo_proc *
1.7 guenther 45: cmp_procs(struct kinfo_proc *p1, struct kinfo_proc *p2)
1.4 nicm 46: {
47: if (is_runnable(p1) && !is_runnable(p2))
48: return (p1);
49: if (!is_runnable(p1) && is_runnable(p2))
50: return (p2);
51:
52: if (is_stopped(p1) && !is_stopped(p2))
53: return (p1);
54: if (!is_stopped(p1) && is_stopped(p2))
55: return (p2);
56:
57: if (p1->p_estcpu > p2->p_estcpu)
58: return (p1);
59: if (p1->p_estcpu < p2->p_estcpu)
60: return (p2);
61:
62: if (p1->p_slptime < p2->p_slptime)
63: return (p1);
64: if (p1->p_slptime > p2->p_slptime)
65: return (p2);
66:
67: if ((p1->p_flag & P_SINTR) && !(p2->p_flag & P_SINTR))
68: return (p1);
69: if (!(p1->p_flag & P_SINTR) && (p2->p_flag & P_SINTR))
70: return (p2);
71:
72: if (strcmp(p1->p_comm, p2->p_comm) < 0)
73: return (p1);
74: if (strcmp(p1->p_comm, p2->p_comm) > 0)
75: return (p2);
76:
77: if (p1->p_pid > p2->p_pid)
78: return (p1);
79: return (p2);
80: }
1.1 nicm 81:
82: char *
83: get_proc_name(int fd, char *tty)
84: {
1.7 guenther 85: int mib[6] = { CTL_KERN, KERN_PROC, KERN_PROC_PGRP, 0,
86: sizeof(struct kinfo_proc), 0 };
1.1 nicm 87: struct stat sb;
88: size_t len;
1.7 guenther 89: struct kinfo_proc *buf, *newbuf, *bestp;
1.1 nicm 90: u_int i;
91: char *name;
92:
93: buf = NULL;
94:
95: if (stat(tty, &sb) == -1)
96: return (NULL);
97: if ((mib[3] = tcgetpgrp(fd)) == -1)
98: return (NULL);
99:
100: retry:
101: if (sysctl(mib, nitems(mib), NULL, &len, NULL, 0) == -1)
1.12 nicm 102: goto error;
1.1 nicm 103: len = (len * 5) / 4;
104:
1.4 nicm 105: if ((newbuf = realloc(buf, len)) == NULL)
106: goto error;
1.1 nicm 107: buf = newbuf;
108:
1.7 guenther 109: mib[5] = (int)(len / sizeof(struct kinfo_proc));
1.1 nicm 110: if (sysctl(mib, nitems(mib), buf, &len, NULL, 0) == -1) {
111: if (errno == ENOMEM)
112: goto retry;
1.4 nicm 113: goto error;
1.1 nicm 114: }
115:
116: bestp = NULL;
1.7 guenther 117: for (i = 0; i < len / sizeof (struct kinfo_proc); i++) {
1.6 guenther 118: if ((dev_t)buf[i].p_tdev != sb.st_rdev)
1.1 nicm 119: continue;
1.4 nicm 120: if (bestp == NULL)
1.6 guenther 121: bestp = &buf[i];
1.4 nicm 122: else
1.6 guenther 123: bestp = cmp_procs(&buf[i], bestp);
1.1 nicm 124: }
125:
126: name = NULL;
127: if (bestp != NULL)
128: name = strdup(bestp->p_comm);
129:
130: free(buf);
131: return (name);
1.4 nicm 132:
133: error:
134: free(buf);
135: return (NULL);
1.17 nicm 136: }
137:
138: char *
139: get_proc_cwd(int fd)
140: {
141: int name[] = { CTL_KERN, KERN_PROC_CWD, 0 };
1.18 deraadt 142: static char path[PATH_MAX];
1.17 nicm 143: size_t pathlen = sizeof path;
144:
145: if ((name[2] = tcgetpgrp(fd)) == -1)
146: return (NULL);
147: if (sysctl(name, 3, path, &pathlen, NULL, 0) != 0)
148: return (NULL);
149: return (path);
1.1 nicm 150: }
![[BACK]](/icons/back.gif){kind=icon}
Return to procname.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / tmux