1 /*- 2 * Copyright (c) 2008 John Birrell (jb@freebsd.org) 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #include "_libproc.h" 30 #include <errno.h> 31 #include <unistd.h> 32 #include <sys/ptrace.h> 33 #include <sys/wait.h> 34 #include <stdio.h> 35 36 int 37 proc_clearflags(struct proc_handle *phdl, int mask) 38 { 39 if (phdl == NULL) 40 return (EINVAL); 41 42 phdl->flags &= ~mask; 43 44 return (0); 45 } 46 47 int 48 proc_continue(struct proc_handle *phdl) 49 { 50 if (phdl == NULL) 51 return (EINVAL); 52 53 if (ptrace(PT_CONTINUE, phdl->pid, (caddr_t)(uintptr_t) 1, 0) != 0) 54 return (errno); 55 56 phdl->status = PS_RUN; 57 58 return (0); 59 } 60 61 int 62 proc_detach(struct proc_handle *phdl) 63 { 64 if (phdl == NULL) 65 return (EINVAL); 66 67 if (ptrace(PT_DETACH, phdl->pid, 0, 0) != 0) 68 return (errno); 69 70 return (0); 71 } 72 73 int 74 proc_getflags(struct proc_handle *phdl) 75 { 76 if (phdl == NULL) 77 return (-1); 78 79 return(phdl->flags); 80 } 81 82 int 83 proc_setflags(struct proc_handle *phdl, int mask) 84 { 85 if (phdl == NULL) 86 return (EINVAL); 87 88 phdl->flags |= mask; 89 90 return (0); 91 } 92 93 int 94 proc_state(struct proc_handle *phdl) 95 { 96 if (phdl == NULL) 97 return (-1); 98 99 return (phdl->status); 100 } 101 102 int 103 proc_wait(struct proc_handle *phdl) 104 { 105 int status = 0; 106 struct kevent kev; 107 108 if (phdl == NULL) 109 return (EINVAL); 110 111 if (kevent(phdl->kq, NULL, 0, &kev, 1, NULL) <= 0) 112 return (0); 113 114 switch (kev.filter) { 115 /* Child has exited */ 116 case EVFILT_PROC: /* target has exited */ 117 phdl->status = PS_UNDEAD; 118 break; 119 default: 120 break; 121 } 122 123 return (status); 124 } 125 126 pid_t 127 proc_getpid(struct proc_handle *phdl) 128 { 129 if (phdl == NULL) 130 return (-1); 131 132 return (phdl->pid); 133 } 134