1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* 28 * file.c - file dependency vertex code 29 * 30 * In principle, file dependencies should be retested on mount/unmount 31 * events, and dependency error flow used to determine whether a lost file 32 * affects the dependent service. If mount/unmount events are not available, 33 * the kstat facility (which registers or deregisters a statistic at 34 * mount/umount) could be used as an indirect filesystem event detector. 35 * 36 * In practice, file dependencies are checked only for existence at start 37 * time. 38 */ 39 40 #include <sys/stat.h> 41 #include <sys/types.h> 42 #include <errno.h> 43 #include <stdio.h> 44 #include <string.h> 45 #include <strings.h> 46 47 #include <startd.h> 48 49 int 50 file_ready(graph_vertex_t *v) 51 { 52 char *fn; 53 struct stat sbuf; 54 int r; 55 char *file_fmri = v->gv_name; 56 57 /* 58 * Advance through file: FMRI until we have an absolute file path. 59 */ 60 if (strncmp(file_fmri, "file:///", sizeof ("file:///") - 1) == 0) { 61 fn = file_fmri + sizeof ("file://") - 1; 62 } else if (strncmp(file_fmri, "file://localhost/", 63 sizeof ("file://localhost/") - 1) == 0) { 64 fn = file_fmri + sizeof ("file://localhost") - 1; 65 } else if (strncmp(file_fmri, "file://", sizeof ("file://") - 1) 66 == 0) { 67 fn = file_fmri + sizeof ("file://") - 1; 68 69 /* 70 * Again, search for the next '/'. 71 */ 72 if ((fn = strchr(fn, '/')) == NULL) 73 return (0); 74 } 75 76 /* 77 * If stat(2) succeeds for that path, then the dependency is satisfied. 78 */ 79 do { 80 r = stat(fn, &sbuf); 81 } while (r == -1 && errno == EINTR); 82 83 return (r == -1 ? 0 : 1); 84 } 85