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Annotation of src/usr.bin/tmux/cfg.c, Revision 1.2

1.2     ! nicm        1: /* $OpenBSD: cfg.c,v 1.1 2009/06/01 22:58:49 nicm 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:
                     38: void printflike2
                     39: cfg_print(unused struct cmd_ctx *ctx, unused const char *fmt, ...)
                     40: {
                     41: }
                     42:
                     43: void printflike2
                     44: cfg_error(unused struct cmd_ctx *ctx, const char *fmt, ...)
                     45: {
                     46:        va_list ap;
                     47:
                     48:        va_start(ap, fmt);
                     49:        xvasprintf(&cfg_cause, fmt, ap);
                     50:        va_end(ap);
                     51: }
                     52:
                     53: int
                     54: load_cfg(const char *path, char **cause)
                     55: {
                     56:        FILE            *f;
                     57:        u_int            n;
                     58:        struct stat      sb;
                     59:        char            *buf, *line, *ptr;
                     60:        size_t           len;
                     61:        struct cmd_list *cmdlist;
                     62:        struct cmd_ctx   ctx;
                     63:
                     64:        if (stat(path, &sb) != 0) {
                     65:                xasprintf(cause, "%s: %s", path, strerror(errno));
                     66:                return (-1);
                     67:        }
                     68:        if (!S_ISREG(sb.st_mode)) {
                     69:                xasprintf(cause, "%s: not a regular file", path);
                     70:                return (-1);
                     71:        }
                     72:
                     73:        if ((f = fopen(path, "rb")) == NULL) {
                     74:                xasprintf(cause, "%s: %s", path, strerror(errno));
                     75:                return (1);
                     76:        }
                     77:        n = 0;
                     78:
                     79:        line = NULL;
                     80:        while ((buf = fgetln(f, &len))) {
                     81:                if (buf[len - 1] == '\n')
                     82:                        buf[len - 1] = '\0';
                     83:                else {
                     84:                        line = xrealloc(line, 1, len + 1);
                     85:                        memcpy(line, buf, len);
                     86:                        line[len] = '\0';
                     87:                        buf = line;
                     88:                }
                     89:                n++;
                     90:
                     91:                if (cmd_string_parse(buf, &cmdlist, cause) != 0) {
                     92:                        if (*cause == NULL)
                     93:                                continue;
                     94:                        goto error;
                     95:                }
                     96:                if (cmdlist == NULL)
                     97:                        continue;
                     98:                cfg_cause = NULL;
                     99:
                    100:                ctx.msgdata = NULL;
                    101:                ctx.cursession = NULL;
                    102:                ctx.curclient = NULL;
                    103:
                    104:                ctx.error = cfg_error;
                    105:                ctx.print = cfg_print;
                    106:                ctx.info = cfg_print;
                    107:
                    108:                ctx.cmdclient = NULL;
                    109:
                    110:                cfg_cause = NULL;
                    111:                cmd_list_exec(cmdlist, &ctx);
                    112:                cmd_list_free(cmdlist);
                    113:                if (cfg_cause != NULL) {
                    114:                        *cause = cfg_cause;
                    115:                        goto error;
                    116:                }
                    117:        }
                    118:        if (line != NULL)
                    119:                xfree(line);
                    120:        fclose(f);
                    121:
                    122:        return (0);
                    123:
                    124: error:
                    125:        fclose(f);
                    126:
                    127:        xasprintf(&ptr, "%s: %s at line %u", path, *cause, n);
                    128:        xfree(*cause);
                    129:        *cause = ptr;
                    130:        return (1);
                    131: }