nfs-utils-2.4.3.tar.gz

/* $OpenBSD: conf.c,v 1.55 2003/06/03 14:28:16 ho Exp $ */ /* $EOM: conf.c,v 1.48 2000/12/04 02:04:29 angelos Exp $ */ /* * Copyright (c) 1998, 1999, 2000, 2001 Niklas Hallqvist. All rights reserved. * Copyright (c) 2000, 2001, 2002 H�kan Olsson. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * This code was written under funding by Ericsson Radio Systems. */ #ifdef HAVE_CONFIG_H #include <config.h> #endif #include <sys/param.h> #include <sys/mman.h> #include <sys/socket.h> #include <sys/stat.h> #include <netinet/in.h> #include <arpa/inet.h> #include <ctype.h> #include <fcntl.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <errno.h> #include <err.h> #include <syslog.h> #include <libgen.h> #include <sys/file.h> #include <time.h> #include "conffile.h" #include "xlog.h" #pragma GCC visibility push(hidden) static void conf_load_defaults(void); static char * conf_readfile(const char *path); static int conf_set(int , const char *, const char *, const char *, const char *, int , int ); static void conf_parse(int trans, char *buf, char **section, char **subsection, const char *filename); struct conf_trans { TAILQ_ENTRY (conf_trans) link; int trans; enum conf_op { CONF_SET, CONF_REMOVE, CONF_REMOVE_SECTION } op; char *section; char *arg; char *tag; char *value; int override; int is_default; }; TAILQ_HEAD (conf_trans_head, conf_trans) conf_trans_queue; /* * Radix-64 Encoding. */ static const uint8_t asc2bin[] = { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 62, 255, 255, 255, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 255, 255, 255, 255, 255, 255, 255, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 255, 255, 255, 255, 255, 255, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 255, 255, 255, 255, 255 }; struct conf_binding { LIST_ENTRY (conf_binding) link; char *section; char *arg; char *tag; char *value; int is_default; }; LIST_HEAD (conf_bindings, conf_binding) conf_bindings[256]; const char *modified_by = NULL; static __inline__ uint8_t conf_hash(const char *s) { uint8_t hash = 0; while (*s) { hash = ((hash << 1) | (hash >> 7)) ^ tolower (*s); s++; } return hash; } /* * Insert a tag-value combination from LINE (the equal sign is at POS) */ static int conf_remove_now(const char *section, const char *tag) { struct conf_binding *cb, *next; cb = LIST_FIRST(&conf_bindings[conf_hash (section)]); for (; cb; cb = next) { next = LIST_NEXT(cb, link); if (strcasecmp(cb->section, section) == 0 && strcasecmp(cb->tag, tag) == 0) { LIST_REMOVE(cb, link); xlog(LOG_INFO,"[%s]:%s->%s removed", section, tag, cb->value); free(cb->section); free(cb->arg); free(cb->tag); free(cb->value); free(cb); return 0; } } return 1; } static int conf_remove_section_now(const char *section) { struct conf_binding *cb, *next; int unseen = 1; cb = LIST_FIRST(&conf_bindings[conf_hash (section)]); for (; cb; cb = next) { next = LIST_NEXT(cb, link); if (strcasecmp(cb->section, section) == 0) { unseen = 0; LIST_REMOVE(cb, link); xlog(LOG_INFO, "[%s]:%s->%s removed", section, cb->tag, cb->value); free(cb->section); free(cb->arg); free(cb->tag); free(cb->value); free(cb); } } return unseen; } /* * Insert a tag-value combination from LINE (the equal sign is at POS) * into SECTION of our configuration database. */ static int conf_set_now(const char *section, const char *arg, const char *tag, const char *value, int override, int is_default) { struct conf_binding *node = 0; if (override) conf_remove_now(section, tag); else if (conf_get_section(section, arg, tag)) { if (!is_default) { xlog(LOG_INFO, "conf_set: duplicate tag [%s]:%s, ignoring...", section, tag); } return 1; } node = calloc(1, sizeof *node); if (!node) { xlog_warn("conf_set: calloc (1, %lu) failed", (unsigned long)sizeof *node); return 1; } node->section = strdup(section); if (arg) node->arg = strdup(arg); node->tag = strdup(tag); node->value = strdup(value); node->is_default = is_default; LIST_INSERT_HEAD(&conf_bindings[conf_hash (section)], node, link); return 0; } /* Attempt to construct a relative path to the new file */ static char * relative_path(const char *oldfile, const char *newfile) { char *tmpcopy = NULL; char *dir = NULL; char *relpath = NULL; size_t pathlen; if (!newfile) return strdup(oldfile); if (newfile[0] == '/') return strdup(newfile); tmpcopy = strdup(oldfile); if (!tmpcopy) goto mem_err; dir = dirname(tmpcopy); pathlen = strlen(dir) + strlen(newfile) + 2; relpath = calloc(1, pathlen); if (!relpath) goto mem_err; snprintf(relpath, pathlen, "%s/%s", dir, newfile); free(tmpcopy); return relpath; mem_err: if (tmpcopy) free(tmpcopy); return NULL; } /* * Parse the line LINE of SZ bytes. Skip Comments, recognize section * headers and feed tag-value pairs into our configuration database. */ static void conf_parse_line(int trans, char *line, const char *filename, int lineno, char **section, char **subsection) { char *val, *ptr; char *inc_section = NULL, *inc_subsection = NULL; char *relpath, *subconf; /* Strip off any leading blanks */ while (isspace(*line)) line++; /* Ignore blank lines */ if (*line == '\0') return; /* Lines starting with '#' or ';' are comments. */ if (*line == '#' || *line == ';') return; /* '[section]' parsing... */ if (*line == '[') { line++; if (*section) { free(*section); *section = NULL; } if (*subsection) { free(*subsection); *subsection = NULL; } /* Strip off any blanks after '[' */ while (isblank(*line)) line++; /* find the closing ] */ ptr = strchr(line, ']'); if (ptr == NULL) { xlog_warn("config error at %s:%d: " "non-matched ']', ignoring until next section", filename, lineno); return; } /* just ignore everything after the closing ] */ *(ptr--) = '\0'; /* Strip off any blanks before ']' */ while (ptr >= line && isblank(*ptr)) *(ptr--)='\0'; /* look for an arg to split from the section name */ val = strchr(line, '"'); if (val != NULL) { ptr = val - 1; *(val++) = '\0'; /* trim away any whitespace before the " */ while (ptr > line && isblank(*ptr)) *(ptr--)='\0'; } /* copy the section name */ *section = strdup(line); if (!*section) {