1 /* $OpenBSD: cfg.c,v 1.16 2012/07/11 07:10:15 nicm Exp $ */ 2 3 /* 4 * Copyright (c) 2008 Nicholas Marriott <nicm@users.sourceforge.net> 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/types.h> 20 #include <sys/stat.h> 21 22 #include <errno.h> 23 #include <stdio.h> 24 #include <stdlib.h> 25 #include <string.h> 26 27 #include "tmux.h" 28 29 /* 30 * Config file parser. Pretty quick and simple, each line is parsed into a 31 * argv array and executed as a command. 32 */ 33 34 void printflike2 cfg_print(struct cmd_ctx *, const char *, ...); 35 void printflike2 cfg_error(struct cmd_ctx *, const char *, ...); 36 37 char *cfg_cause; 38 int cfg_finished; 39 struct causelist cfg_causes = ARRAY_INITIALIZER; 40 41 /* ARGSUSED */ 42 void printflike2 43 cfg_print(unused struct cmd_ctx *ctx, unused const char *fmt, ...) 44 { 45 } 46 47 /* ARGSUSED */ 48 void printflike2 49 cfg_error(unused struct cmd_ctx *ctx, const char *fmt, ...) 50 { 51 va_list ap; 52 53 va_start(ap, fmt); 54 xvasprintf(&cfg_cause, fmt, ap); 55 va_end(ap); 56 } 57 58 void printflike2 59 cfg_add_cause(struct causelist *causes, const char *fmt, ...) 60 { 61 char *cause; 62 va_list ap; 63 64 va_start(ap, fmt); 65 xvasprintf(&cause, fmt, ap); 66 va_end(ap); 67 68 ARRAY_ADD(causes, cause); 69 } 70 71 /* 72 * Load configuration file. Returns -1 for an error with a list of messages in 73 * causes. Note that causes must be initialised by the caller! 74 */ 75 int 76 load_cfg(const char *path, struct cmd_ctx *ctxin, struct causelist *causes) 77 { 78 FILE *f; 79 u_int n; 80 char *buf, *line, *cause; 81 size_t len; 82 struct cmd_list *cmdlist; 83 struct cmd_ctx ctx; 84 enum cmd_retval retval; 85 86 if ((f = fopen(path, "rb")) == NULL) { 87 cfg_add_cause(causes, "%s: %s", path, strerror(errno)); 88 return (-1); 89 } 90 n = 0; 91 92 line = NULL; 93 retval = CMD_RETURN_NORMAL; 94 while ((buf = fgetln(f, &len))) { 95 if (buf[len - 1] == '\n') 96 len--; 97 98 if (line != NULL) 99 line = xrealloc(line, 1, strlen(line) + len + 1); 100 else { 101 line = xmalloc(len + 1); 102 *line = '\0'; 103 } 104 105 /* Append buffer to line. strncat will terminate. */ 106 strncat(line, buf, len); 107 n++; 108 109 /* Continuation: get next line? */ 110 len = strlen(line); 111 if (len > 0 && line[len - 1] == '\\') { 112 line[len - 1] = '\0'; 113 /* Ignore escaped backslash at EOL. */ 114 if (len > 1 && line[len - 2] != '\\') 115 continue; 116 } 117 buf = line; 118 line = NULL; 119 120 if (cmd_string_parse(buf, &cmdlist, &cause) != 0) { 121 free(buf); 122 if (cause == NULL) 123 continue; 124 cfg_add_cause(causes, "%s: %u: %s", path, n, cause); 125 free(cause); 126 continue; 127 } else 128 free(buf); 129 if (cmdlist == NULL) 130 continue; 131 cfg_cause = NULL; 132 133 if (ctxin == NULL) { 134 ctx.msgdata = NULL; 135 ctx.curclient = NULL; 136 ctx.cmdclient = NULL; 137 } else { 138 ctx.msgdata = ctxin->msgdata; 139 ctx.curclient = ctxin->curclient; 140 ctx.cmdclient = ctxin->cmdclient; 141 } 142 143 ctx.error = cfg_error; 144 ctx.print = cfg_print; 145 ctx.info = cfg_print; 146 147 cfg_cause = NULL; 148 switch (cmd_list_exec(cmdlist, &ctx)) { 149 case CMD_RETURN_YIELD: 150 if (retval != CMD_RETURN_ATTACH) 151 retval = CMD_RETURN_YIELD; 152 break; 153 case CMD_RETURN_ATTACH: 154 retval = CMD_RETURN_ATTACH; 155 break; 156 case CMD_RETURN_ERROR: 157 case CMD_RETURN_NORMAL: 158 break; 159 } 160 cmd_list_free(cmdlist); 161 if (cfg_cause != NULL) { 162 cfg_add_cause( 163 causes, "%s: %d: %s", path, n, cfg_cause); 164 free(cfg_cause); 165 } 166 } 167 if (line != NULL) { 168 cfg_add_cause(causes, 169 "%s: %d: line continuation at end of file", path, n); 170 free(line); 171 } 172 fclose(f); 173 174 return (retval); 175 } 176