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> /* MAXCOMLEN */ 20 #include <sys/types.h> 21 #include <sys/proc.h> 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 30 #include "compat.h" 31 32 #ifndef nitems 33 #define nitems(_a) (sizeof((_a)) / sizeof((_a)[0])) 34 #endif 35 36 #define is_runnable(p) \ 37 ((p)->p_stat == SRUN || (p)->p_stat == SIDL || (p)->p_stat == SONPROC) 38 #define is_stopped(p) \ 39 ((p)->p_stat == SSTOP || (p)->p_stat == SDEAD) 40 41 static struct kinfo_proc *cmp_procs(struct kinfo_proc *, struct kinfo_proc *); 42 char *osdep_get_name(int, char *); 43 char *osdep_get_cwd(int); 44 struct event_base *osdep_event_init(void); 45 46 static struct kinfo_proc * 47 cmp_procs(struct kinfo_proc *p1, struct kinfo_proc *p2) 48 { 49 if (is_runnable(p1) && !is_runnable(p2)) 50 return (p1); 51 if (!is_runnable(p1) && is_runnable(p2)) 52 return (p2); 53 54 if (is_stopped(p1) && !is_stopped(p2)) 55 return (p1); 56 if (!is_stopped(p1) && is_stopped(p2)) 57 return (p2); 58 59 if (p1->p_estcpu > p2->p_estcpu) 60 return (p1); 61 if (p1->p_estcpu < p2->p_estcpu) 62 return (p2); 63 64 if (p1->p_slptime < p2->p_slptime) 65 return (p1); 66 if (p1->p_slptime > p2->p_slptime) 67 return (p2); 68 69 if ((p1->p_flag & P_SINTR) && !(p2->p_flag & P_SINTR)) 70 return (p1); 71 if (!(p1->p_flag & P_SINTR) && (p2->p_flag & P_SINTR)) 72 return (p2); 73 74 if (strcmp(p1->p_comm, p2->p_comm) < 0) 75 return (p1); 76 if (strcmp(p1->p_comm, p2->p_comm) > 0) 77 return (p2); 78 79 if (p1->p_pid > p2->p_pid) 80 return (p1); 81 return (p2); 82 } 83 84 char * 85 osdep_get_name(int fd, char *tty) 86 { 87 int mib[6] = { CTL_KERN, KERN_PROC, KERN_PROC_PGRP, 0, 88 sizeof(struct kinfo_proc), 0 }; 89 struct stat sb; 90 size_t len; 91 struct kinfo_proc *buf, *newbuf, *bestp; 92 u_int i; 93 char *name; 94 95 buf = NULL; 96 97 if (stat(tty, &sb) == -1) 98 return (NULL); 99 if ((mib[3] = tcgetpgrp(fd)) == -1) 100 return (NULL); 101 102 retry: 103 if (sysctl(mib, nitems(mib), NULL, &len, NULL, 0) == -1) 104 goto error; 105 len = (len * 5) / 4; 106 107 if ((newbuf = realloc(buf, len)) == NULL) 108 goto error; 109 buf = newbuf; 110 111 mib[5] = (int)(len / sizeof(struct kinfo_proc)); 112 if (sysctl(mib, nitems(mib), buf, &len, NULL, 0) == -1) { 113 if (errno == ENOMEM) 114 goto retry; 115 goto error; 116 } 117 118 bestp = NULL; 119 for (i = 0; i < len / sizeof (struct kinfo_proc); i++) { 120 if ((dev_t)buf[i].p_tdev != sb.st_rdev) 121 continue; 122 if (bestp == NULL) 123 bestp = &buf[i]; 124 else 125 bestp = cmp_procs(&buf[i], bestp); 126 } 127 128 name = NULL; 129 if (bestp != NULL) 130 name = strdup(bestp->p_comm); 131 132 free(buf); 133 return (name); 134 135 error: 136 free(buf); 137 return (NULL); 138 } 139 140 char * 141 osdep_get_cwd(int fd) 142 { 143 int name[] = { CTL_KERN, KERN_PROC_CWD, 0 }; 144 static char path[MAXPATHLEN]; 145 size_t pathlen = sizeof path; 146 147 if ((name[2] = tcgetpgrp(fd)) == -1) 148 return (NULL); 149 if (sysctl(name, 3, path, &pathlen, NULL, 0) != 0) 150 return (NULL); 151 return (path); 152 } 153 154 struct event_base * 155 osdep_event_init(void) 156 { 157 return (event_init()); 158 } 159