1/* $OpenBSD: user.c,v 1.22 2020/04/16 17:51:56 millert Exp $ */ 2 3/* Copyright 1988,1990,1993,1994 by Paul Vixie 4 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") 5 * Copyright (c) 1997,2000 by Internet Software Consortium, Inc. 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT 17 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20#include <sys/types.h> 21 22#include <bitstring.h> /* for structs.h */ 23#include <ctype.h> 24#include <errno.h> 25#include <pwd.h> 26#include <stdio.h> 27#include <stdlib.h> 28#include <string.h> 29#include <syslog.h> 30#include <time.h> /* for structs.h */ 31 32#include "macros.h" 33#include "structs.h" 34#include "funcs.h" 35#include "globals.h" 36 37void 38free_user(user *u) 39{ 40 entry *e; 41 42 while ((e = SLIST_FIRST(&u->crontab))) { 43 SLIST_REMOVE_HEAD(&u->crontab, entries); 44 job_remove(e, u); 45 free_entry(e); 46 } 47 free(u->name); 48 free(u); 49} 50 51static int ParseErrorCount; 52static const char *CrontabFilename; 53 54static void 55parse_error(const char *msg) 56{ 57 ParseErrorCount++; 58 syslog(LOG_ERR, "(CRON) %s:%d (%s)", CrontabFilename, LineNumber, msg); 59} 60 61user * 62load_user(FILE *file, struct passwd *pw, const char *name) 63{ 64 char envstr[MAX_ENVSTR]; 65 user *u; 66 entry *e; 67 int status, save_errno; 68 char **envp = NULL, **tenvp; 69 70 CrontabFilename = name; 71 LineNumber = 0; 72 73 /* file is open. build user entry, then read the crontab file. 74 */ 75 if ((u = malloc(sizeof(user))) == NULL) 76 goto done; 77 if ((u->name = strdup(name)) == NULL) { 78 save_errno = errno; 79 free(u); 80 u = NULL; 81 errno = save_errno; 82 goto done; 83 } 84 SLIST_INIT(&u->crontab); 85 86 /* init environment. this will be copied/augmented for each entry. 87 */ 88 if ((envp = env_init()) == NULL) { 89 save_errno = errno; 90 free_user(u); 91 u = NULL; 92 errno = save_errno; 93 goto done; 94 } 95 96 /* load the crontab 97 */ 98 ParseErrorCount = 0; 99 while ((status = load_env(envstr, file)) >= 0) { 100 switch (status) { 101 case FALSE: 102 /* Not an env variable, parse as crontab entry. */ 103 e = load_entry(file, parse_error, pw, envp); 104 if (e == NULL) { 105 /* Parse error, ignore for non-root entries */ 106 if (pw != NULL) { 107 save_errno = errno; 108 free_user(u); 109 u = NULL; 110 errno = save_errno; 111 goto done; 112 } 113 } else { 114 SLIST_INSERT_HEAD(&u->crontab, e, entries); 115 } 116 break; 117 case TRUE: 118 if ((tenvp = env_set(envp, envstr)) == NULL) { 119 save_errno = errno; 120 free_user(u); 121 u = NULL; 122 errno = save_errno; 123 goto done; 124 } 125 envp = tenvp; 126 break; 127 } 128 } 129 130 done: 131 if (envp != NULL) 132 env_free(envp); 133 return (u); 134} 135