1/* $OpenBSD$ */ 2 3/* 4 * Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com> 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 19#include <sys/param.h> 20#include <sys/stat.h> 21#include <sys/sysctl.h> 22#include <sys/user.h> 23 24#include <err.h> 25#include <errno.h> 26#include <stdint.h> 27#include <stdlib.h> 28#include <string.h> 29#include <unistd.h> 30 31struct kinfo_proc *cmp_procs(struct kinfo_proc *, struct kinfo_proc *); 32char *osdep_get_name(int, char *); 33char *osdep_get_cwd(int); 34struct event_base *osdep_event_init(void); 35 36#ifndef nitems 37#define nitems(_a) (sizeof((_a)) / sizeof((_a)[0])) 38#endif 39 40#define is_runnable(p) \ 41 ((p)->kp_stat == SACTIVE || (p)->kp_stat == SIDL) 42#define is_stopped(p) \ 43 ((p)->kp_stat == SSTOP || (p)->kp_stat == SZOMB) 44 45struct kinfo_proc * 46cmp_procs(struct kinfo_proc *p1, struct kinfo_proc *p2) 47{ 48 if (is_runnable(p1) && !is_runnable(p2)) 49 return (p1); 50 if (!is_runnable(p1) && is_runnable(p2)) 51 return (p2); 52 53 if (is_stopped(p1) && !is_stopped(p2)) 54 return (p1); 55 if (!is_stopped(p1) && is_stopped(p2)) 56 return (p2); 57 58 if (strcmp(p1->kp_comm, p2->kp_comm) < 0) 59 return (p1); 60 if (strcmp(p1->kp_comm, p2->kp_comm) > 0) 61 return (p2); 62 63 if (p1->kp_pid > p2->kp_pid) 64 return (p1); 65 return (p2); 66} 67 68char * 69osdep_get_name(int fd, char *tty) 70{ 71 int mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PGRP, 0 }; 72 struct stat sb; 73 size_t len; 74 struct kinfo_proc *buf, *newbuf, *bestp; 75 u_int i; 76 char *name; 77 78 buf = NULL; 79 80 if (stat(tty, &sb) == -1) 81 return (NULL); 82 if ((mib[3] = tcgetpgrp(fd)) == -1) 83 return (NULL); 84 85retry: 86 if (sysctl(mib, nitems(mib), NULL, &len, NULL, 0) == -1) 87 return (NULL); 88 len = (len * 5) / 4; 89 90 if ((newbuf = realloc(buf, len)) == NULL) 91 goto error; 92 buf = newbuf; 93 94 if (sysctl(mib, nitems(mib), buf, &len, NULL, 0) == -1) { 95 if (errno == ENOMEM) 96 goto retry; 97 goto error; 98 } 99 100 bestp = NULL; 101 for (i = 0; i < len / sizeof (struct kinfo_proc); i++) { 102 if (buf[i].kp_tdev != sb.st_rdev) 103 continue; 104 if (bestp == NULL) 105 bestp = &buf[i]; 106 else 107 bestp = cmp_procs(&buf[i], bestp); 108 } 109 110 name = NULL; 111 if (bestp != NULL) 112 name = strdup(bestp->kp_comm); 113 114 free(buf); 115 return (name); 116 117error: 118 free(buf); 119 return (NULL); 120} 121 122char * 123osdep_get_cwd(int fd) 124{ 125 return (NULL); 126} 127 128struct event_base * 129osdep_event_init(void) 130{ 131 return (event_init()); 132} 133