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 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 /* 30 * file.c - file dependency vertex code 31 * 32 * In principle, file dependencies should be retested on mount/unmount 33 * events, and dependency error flow used to determine whether a lost file 34 * affects the dependent service. If mount/unmount events are not available, 35 * the kstat facility (which registers or deregisters a statistic at 36 * mount/umount) could be used as an indirect filesystem event detector. 37 * 38 * In practice, file dependencies are checked only for existence at start 39 * time. 40 */ 41 42 #include <sys/stat.h> 43 #include <sys/types.h> 44 #include <errno.h> 45 #include <stdio.h> 46 #include <string.h> 47 #include <strings.h> 48 49 #include <startd.h> 50 51 int 52 file_ready(graph_vertex_t *v) 53 { 54 char *fn; 55 struct stat sbuf; 56 int r; 57 char *file_fmri = v->gv_name; 58 59 /* 60 * Advance through file: FMRI until we have an absolute file path. 61 */ 62 if (strncmp(file_fmri, "file:///", sizeof ("file:///") - 1) == 0) { 63 fn = file_fmri + sizeof ("file://") - 1; 64 } else if (strncmp(file_fmri, "file://localhost/", 65 sizeof ("file://localhost/") - 1) == 0) { 66 fn = file_fmri + sizeof ("file://localhost") - 1; 67 } else if (strncmp(file_fmri, "file://", sizeof ("file://") - 1) 68 == 0) { 69 fn = file_fmri + sizeof ("file://") - 1; 70 71 /* 72 * Again, search for the next '/'. 73 */ 74 if ((fn = strchr(fn, '/')) == NULL) 75 return (0); 76 } 77 78 /* 79 * If stat(2) succeeds for that path, then the dependency is satisfied. 80 */ 81 do { 82 r = stat(fn, &sbuf); 83 } while (r == -1 && errno == EINTR); 84 85 return (r == -1 ? 0 : 1); 86 } 87