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Annotation of src/usr.bin/tmux/cfg.c, Revision 1.8

1.8     ! nicm        1: /* $OpenBSD: cfg.c,v 1.7 2009/10/26 21:42:04 deraadt Exp $ */
1.1       nicm        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 <string.h>
                     25:
                     26: #include "tmux.h"
                     27:
                     28: /*
                     29:  * Config file parser. Pretty quick and simple, each line is parsed into a
                     30:  * argv array and executed as a command.
                     31:  */
                     32:
                     33: void printflike2 cfg_print(struct cmd_ctx *, const char *, ...);
                     34: void printflike2 cfg_error(struct cmd_ctx *, const char *, ...);
                     35:
                     36: char    *cfg_cause;
                     37:
1.8     ! nicm       38: /* ARGSUSED */
1.1       nicm       39: void printflike2
                     40: cfg_print(unused struct cmd_ctx *ctx, unused const char *fmt, ...)
                     41: {
                     42: }
                     43:
1.8     ! nicm       44: /* ARGSUSED */
1.1       nicm       45: void printflike2
                     46: cfg_error(unused struct cmd_ctx *ctx, const char *fmt, ...)
                     47: {
                     48:        va_list ap;
                     49:
                     50:        va_start(ap, fmt);
                     51:        xvasprintf(&cfg_cause, fmt, ap);
                     52:        va_end(ap);
                     53: }
                     54:
                     55: int
1.6       nicm       56: load_cfg(const char *path, struct cmd_ctx *ctxin, char **cause)
1.1       nicm       57: {
1.7       deraadt    58:        FILE            *f;
1.1       nicm       59:        u_int            n;
1.7       deraadt    60:        char            *buf, *line, *ptr;
1.1       nicm       61:        size_t           len;
                     62:        struct cmd_list *cmdlist;
                     63:        struct cmd_ctx   ctx;
                     64:
                     65:        if ((f = fopen(path, "rb")) == NULL) {
                     66:                xasprintf(cause, "%s: %s", path, strerror(errno));
                     67:                return (1);
                     68:        }
                     69:        n = 0;
                     70:
                     71:        line = NULL;
                     72:        while ((buf = fgetln(f, &len))) {
                     73:                if (buf[len - 1] == '\n')
                     74:                        buf[len - 1] = '\0';
                     75:                else {
                     76:                        line = xrealloc(line, 1, len + 1);
                     77:                        memcpy(line, buf, len);
                     78:                        line[len] = '\0';
                     79:                        buf = line;
                     80:                }
                     81:                n++;
                     82:
                     83:                if (cmd_string_parse(buf, &cmdlist, cause) != 0) {
                     84:                        if (*cause == NULL)
                     85:                                continue;
                     86:                        goto error;
                     87:                }
                     88:                if (cmdlist == NULL)
                     89:                        continue;
                     90:                cfg_cause = NULL;
                     91:
1.6       nicm       92:                if (ctxin == NULL) {
                     93:                        ctx.msgdata = NULL;
                     94:                        ctx.curclient = NULL;
                     95:                        ctx.cmdclient = NULL;
                     96:                } else {
                     97:                        ctx.msgdata = ctxin->msgdata;
                     98:                        ctx.curclient = ctxin->curclient;
                     99:                        ctx.cmdclient = ctxin->cmdclient;
                    100:                }
1.1       nicm      101:
                    102:                ctx.error = cfg_error;
                    103:                ctx.print = cfg_print;
                    104:                ctx.info = cfg_print;
                    105:
                    106:                cfg_cause = NULL;
                    107:                cmd_list_exec(cmdlist, &ctx);
                    108:                cmd_list_free(cmdlist);
                    109:                if (cfg_cause != NULL) {
                    110:                        *cause = cfg_cause;
                    111:                        goto error;
                    112:                }
                    113:        }
                    114:        if (line != NULL)
                    115:                xfree(line);
                    116:        fclose(f);
                    117:
                    118:        return (0);
                    119:
                    120: error:
1.4       nicm      121:        if (line != NULL)
                    122:                xfree(line);
1.1       nicm      123:        fclose(f);
                    124:
                    125:        xasprintf(&ptr, "%s: %s at line %u", path, *cause, n);
                    126:        xfree(*cause);
                    127:        *cause = ptr;
                    128:        return (1);
                    129: }