#include "compat.h" #include "libconfig.h" #include "libconfig_private.h" #include "conf_section.h" #include "conf_apache.h" #include "conf_colon.h" #include "conf_equal.h" #include "conf_space.h" #include "conf_xml.h" #ifdef HAVE_STRING_H #include <string.h> #endif #ifdef HAVE_STDLIB_H #include <stdlib.h> #endif #ifdef HAVE_CTYPE_H #include <ctype.h> #endif #ifdef HAVE_STDIO_H #include <stdio.h> #endif #ifdef HAVE_UNISTD_H #include <unistd.h> #endif #ifdef HAVE_SYS_TYPES_H #include <sys/types.h> #endif #ifdef HAVE_PWD_H #include <pwd.h> #endif struct lc_varhandler_st *varhandlers = NULL; lc_err_t lc_errno = LC_ERR_NONE; int lc_optind = 0; extern char **environ; static int lc_process_var_string(void *data, const char *value) { char **dataval; dataval = data; *dataval = strdup(value); return(0); } static int lc_process_var_longlong(void *data, const char *value) { long long *dataval; dataval = data; *dataval = strtoll(value, NULL, 10); return(0); } static int lc_process_var_long(void *data, const char *value) { long *dataval; dataval = data; *dataval = strtoll(value, NULL, 10); return(0); } static int lc_process_var_int(void *data, const char *value) { int *dataval; dataval = data; *dataval = strtoll(value, NULL, 10); return(0); } static int lc_process_var_short(void *data, const char *value) { short *dataval; dataval = data; *dataval = strtoll(value, NULL, 10); return(0); } static int lc_process_var_bool_byexistance(void *data, const char *value) { int *dataval; dataval = data; *dataval = 1; return(0); } static int lc_process_var_bool(void *data, const char *value) { int *dataval; dataval = data; *dataval = -1; if (strcasecmp(value, "enable") == 0 || strcasecmp(value, "true") == 0 || strcasecmp(value, "yes") == 0 || strcasecmp(value, "on") == 0 || strcasecmp(value, "y") == 0 || strcasecmp(value, "1") == 0) { *dataval = 1; return(0); } else if (strcasecmp(value, "disable") == 0 || strcasecmp(value, "false") == 0 || strcasecmp(value, "off") == 0 || strcasecmp(value, "no") == 0 || strcasecmp(value, "n") == 0 || strcasecmp(value, "0") == 0) { *dataval = 0; return(0); } lc_errno = LC_ERR_BADFORMAT; return(-1); } static long long lc_process_size(const char *value) { long long retval = -1; char *mult = NULL; retval = strtoll(value, &mult, 10); if (mult != NULL) { switch (tolower(mult[0])) { case 'p': retval *= 1125899906842624LLU; break; case 't': retval *= 1958505086976LLU; break; case 'g': retval *= 1073741824; break; case 'm': retval *= 1048576; break; case 'k': retval *= 1024; break; default: break; } } return(retval); } static int lc_process_var_sizelonglong(void *data, const char *value) { long long *dataval; dataval = data; *dataval = lc_process_size(value); return(0); } static int lc_process_var_sizelong(void *data, const char *value) { long *dataval; dataval = data; *dataval = lc_process_size(value); return(0); } static int lc_process_var_sizeint(void *data, const char *value) { int *dataval; dataval = data; *dataval = lc_process_size(value); return(0); } static int lc_process_var_sizeshort(void *data, const char *value) { short *dataval; dataval = data; *dataval = lc_process_size(value); return(0); } static int lc_handle_type(lc_var_type_t type, const char *value, void *data) { switch (type) { case LC_VAR_STRING: return(lc_process_var_string(data, value)); break; case LC_VAR_LONG_LONG: return(lc_process_var_longlong(data, value)); break; case LC_VAR_LONG: return(lc_process_var_long(data, value)); break; case LC_VAR_INT: return(lc_process_var_int(data, value)); break; case LC_VAR_SHORT: return(lc_process_var_short(data, value)); break; case LC_VAR_BOOL: return(lc_process_var_bool(data, value)); break; case LC_VAR_SIZE_LONG_LONG: return(lc_process_var_sizelonglong(data, value)); break; case LC_VAR_SIZE_LONG: return(lc_process_var_sizelong(data, value)); break; case LC_VAR_SIZE_INT: return(lc_process_var_sizeint(data, value)); break; case LC_VAR_SIZE_SHORT: return(lc_process_var_sizeshort(data, value)); break; case LC_VAR_BOOL_BY_EXISTANCE: return(lc_process_var_bool_byexistance(data, value)); break; case LC_VAR_TIME: case LC_VAR_DATE: case LC_VAR_FILENAME: case LC_VAR_DIRECTORY: #ifdef DEBUG fprintf(stderr, "Not implemented yet!\n"); #endif return(-1); case LC_VAR_NONE: case LC_VAR_UNKNOWN: case LC_VAR_SECTION: case LC_VAR_SECTIONSTART: case LC_VAR_SECTIONEND: return(0); break; } return(-1); } static int lc_handle(struct lc_varhandler_st *handler, const char *var, const char *varargs, const char *value, lc_flags_t flags) { const char *localvar = NULL; int retval; if (var != NULL) { localvar = strrchr(var, '.'); if (localvar == NULL) { localvar = var; } else { localvar++; } } else { localvar = NULL; } switch (handler->mode) { case LC_MODE_CALLBACK: if (handler->callback != NULL) { retval = handler->callback(localvar, var, varargs, value, flags, handler->extra); if (retval < 0) { lc_errno = LC_ERR_CALLBACK; } return(retval); } break; case LC_MODE_VAR: return(lc_handle_type(handler->type, value, handler->data)); break; } return(-1); } static int lc_process_environment(const char *appname) { struct lc_varhandler_st *handler = NULL; size_t appnamelen = 0; char varnamebuf[128] = {0}; char **currvar; char *sep = NULL, *value = NULL, *cmd = NULL; char *ucase_appname = NULL, *ucase_appname_itr = NULL; char *lastcomponent_handler = NULL; int varnamelen = 0; /* Make sure we have an environment to screw with, if not, no arguments were found to be in error */ if (environ == NULL || appname == NULL) { return(0); } /* Allocate and create our uppercase appname. */ ucase_appname = strdup(appname); if (ucase_appname == NULL) { lc_errno = LC_ERR_ENOMEM; return(-1); } for (ucase_appname_itr = ucase_appname; *ucase_appname_itr != '\0'; ucase_appname_itr++) { *ucase_appname_itr = toupper(*ucase_appname_itr); } appnamelen = strlen(ucase_appname); for (currvar = environ; *currvar != NULL; currvar++) { /* If it doesn't begin with our appname ignore it completely. */ if (strncmp(*currvar, ucase_appname, appnamelen) != 0) { continue; } /* Find our seperator. */ sep = strchr(*currvar, '='); if (sep == NULL) { continue; } varnamelen = sep - *currvar; /* Skip variables that would overflow our buffer. */ if (varnamelen >= sizeof(varnamebuf)) { continue; } strncpy(varnamebuf, *currvar, varnamelen); varnamebuf[varnamelen] = '\0'; value = sep + 1; /* We ignore APPNAME by itself. */ if (strlen(varnamebuf) <= appnamelen) { continue; } /* Further it must be <APPNAME>_ */ if (varnamebuf[appnamelen] != '_') { continue; } cmd = varnamebuf + appnamelen + 1; /* We don't allow section specifiers, for reasons see notes in the cmdline processor (below). */ if (strchr(cmd, '.') != NULL) { continue; } for (handler = varhandlers; handler != NULL; handler = handler->_next) { if (handler->var == NULL) { continue; } /* Skip handlers which don't agree with being processed outside a config file */ if (handler->type == LC_VAR_SECTION || handler->type == LC_VAR_SECTIONSTART || handler->type == LC_VAR_SECTIONEND || handler->type == LC_VAR_UNKNOWN) { continue; } /* Find the last part of the variable and compare it with the option being processed, if a wildcard is given. */ if (handler->var[0] == '*' && handler->var[1] == '.') { lastcomponent_handler = strrchr(handler->var, '.'); if (lastcomponent_handler == NULL) { lastcomponent_handler = handler->var; } else { lastcomponent_handler++; } } else { lastcomponent_handler = handler->var; } /* Ignore this handler if they don't match. */ if (strcasecmp(lastcomponent_handler, cmd) != 0) { continue; } if (handler->type == LC_VAR_NONE || handler->type == LC_VAR_BOOL_BY_EXISTANCE) { value = NULL; } /* We ignore errors from the environment variables, they're mostly insignificant. */ lc_handle(handler, cmd, NULL, value, LC_FLAGS_ENVIRON); break; } } free(ucase_appname); return(0); } static int lc_process_cmdline(int argc, char **argv) { struct lc_varhandler_st *handler = NULL; char *cmdarg = NULL, *cmdoptarg = NULL; char *lastcomponent_handler = NULL; char **newargv = NULL; char *usedargv = NULL; int cmdargidx = 0; int newargvidx = 0; int retval = 0, chkretval = 0; int ch = 0; /* Allocate "argc + 1" (+1 for the NULL terminator) elements. */ newargv = malloc((argc + 1) * sizeof(*newargv)); if (newargv == NULL) { lc_errno = LC_ERR_ENOMEM; return(-1); } newargv[newargvidx++] = argv[0]; newargv[argc] = NULL; /* Allocate space to indicate which arguments have been used. */ usedargv = malloc(argc * sizeof(*usedargv)); if (usedargv == NULL) { lc_errno = LC_ERR_ENOMEM; free(newargv); return(-1); } for (cmdargidx = 0; cmdargidx < argc; cmdargidx++) { usedargv[cmdargidx] = 0; } for (cmdargidx = 1; cmdargidx < argc; cmdargidx++) { cmdarg = argv[cmdargidx]; /* Make sure we have an argument here. */ if (cmdarg == NULL) { break; } /* If the argument isn't an option, abort. */ if (cmdarg[0] != '-') { continue; } /* Setup a pointer in the new array for the actual argument. */ newargv[newargvidx++] = cmdarg; usedargv[cmdargidx] = 1; /* Then shift the argument past the '-' so we can ignore it. */ cmdarg++; /* Handle long options. */ if (cmdarg[0] == '-') { cmdarg++; /* Don't process arguments after the '--' option. */ if (cmdarg[0] == '\0') { break; } /* Look for a variable name that matches */ for (handler = varhandlers; handler != NULL; handler = handler->_next) { /* Skip handlers with no variable name. */ if (handler->var == NULL) { continue; } /* Skip handlers which don't agree with being processed on the command line. */ if (handler->type == LC_VAR_SECTION || handler->type == LC_VAR_SECTIONSTART || handler->type == LC_VAR_SECTIONEND || handler->type == LC_VAR_UNKNOWN) { continue; } /* Find the last part of the variable and compare it with the option being processed, if a wildcard is given. */ if (handler->var[0] == '*' && handler->var[1] == '.') { lastcomponent_handler = strrchr(handler->var, '.'); if (lastcomponent_handler == NULL) { lastcomponent_handler = handler->var; } else { lastcomponent_handler++; } } else { /* Disallow use of the fully qualified name since there was no sectionstart portion we cannot allow it to handle children of it. */ if (strchr(cmdarg, '.') != NULL) { continue; } lastcomponent_handler = handler->var; } /* Ignore this handler if they don't match. */ if (strcasecmp(lastcomponent_handler, cmdarg) != 0) { continue; } if (handler->type == LC_VAR_NONE || handler->type == LC_VAR_BOOL_BY_EXISTANCE) { cmdoptarg = NULL; } else { cmdargidx++; if (cmdargidx >= argc) { fprintf(stderr, "Argument required.\n"); lc_errno = LC_ERR_BADFORMAT; free(usedargv); free(newargv); return(-1); } cmdoptarg = argv[cmdargidx]; newargv[newargvidx++] = cmdoptarg; usedargv[cmdargidx] = 1; } chkretval = lc_handle(handler, handler->var, NULL, cmdoptarg, LC_FLAGS_CMDLINE); if (chkretval < 0) { retval = -1; } break; } if (handler == NULL) { fprintf(stderr, "Unknown option: --%s\n", cmdarg); lc_errno = LC_ERR_INVCMD; free(usedargv); free(newargv); return(-1); } } else { for (; *cmdarg != '\0'; cmdarg++) { ch = *cmdarg; for (handler = varhandlers; handler != NULL; handler = handler->_next) { if (handler->opt != ch || handler->opt == '\0') { continue; } /* Skip handlers which don't agree with being processed on the command line. */ if (handler->type == LC_VAR_SECTION || handler->type == LC_VAR_SECTIONSTART || handler->type == LC_VAR_SECTIONEND || handler->type == LC_VAR_UNKNOWN) { continue; } if (handler->type == LC_VAR_NONE || handler->type == LC_VAR_BOOL_BY_EXISTANCE) { cmdoptarg = NULL; } else { cmdargidx++; if (cmdargidx >= argc) { fprintf(stderr, "Argument required.\n"); lc_errno = LC_ERR_BADFORMAT; free(usedargv); free(newargv); return(-1); } cmdoptarg = argv[cmdargidx]; newargv[newargvidx++] = cmdoptarg; usedargv[cmdargidx] = 1; } chkretval = lc_handle(handler, handler->var, NULL, cmdoptarg, LC_FLAGS_CMDLINE); if (chkretval < 0) { retval = -1; } break; } if (handler == NULL) { fprintf(stderr, "Unknown option: -%c\n", ch); lc_errno = LC_ERR_INVCMD; free(usedargv); free(newargv); return(-1); } } } } if (retval >= 0) { lc_optind = newargvidx; for (cmdargidx = 1; cmdargidx < argc; cmdargidx++) { if (usedargv[cmdargidx] != 0) { continue; } cmdarg = argv[cmdargidx]; newargv[newargvidx++] = cmdarg; } for (cmdargidx = 1; cmdargidx < argc; cmdargidx++) { argv[cmdargidx] = newargv[cmdargidx]; } } free(usedargv); free(newargv); return(retval); } int lc_process_var(const char *var, const char *varargs, const char *value, lc_flags_t flags) { struct lc_varhandler_st *handler = NULL; const char *lastcomponent_handler = NULL, *lastcomponent_var = NULL; lastcomponent_var = strrchr(var, '.'); if (lastcomponent_var == NULL) { lastcomponent_var = var; } else { lastcomponent_var++; } for (handler = varhandlers; handler != NULL; handler = handler->_next) { /* If either handler->var or var is NULL, skip, unless both are NULL. */ if (handler->var != var && (handler->var == NULL || var == NULL)) { continue; } /* If both are not-NULL, compare them. */ if (handler->var != NULL) { /* Wild-card-ish match. */ if (handler->var[0] == '*' && handler->var[1] == '.') { /* Only compare the last components */ lastcomponent_handler = strrchr(handler->var, '.') + 1; /* strrchr() won't return NULL, because we already checked it. */ if (strcasecmp(lastcomponent_handler, lastcomponent_var) != 0) { continue; } } else if (strcasecmp(handler->var, var) != 0) { /* Exact (case-insensitive comparison) failed. */ continue; } } if (value == NULL && handler->type != LC_VAR_NONE && handler->type != LC_VAR_BOOL_BY_EXISTANCE && handler->type != LC_VAR_SECTION && handler->type != LC_VAR_SECTIONSTART && handler->type != LC_VAR_SECTIONEND) { lc_errno = LC_ERR_BADFORMAT; break; } return(lc_handle(handler, var, varargs, value, flags)); } return(-1); } int lc_register_callback(const char *var, char opt, lc_var_type_t type, int (*callback)(const char *, const char *, const char *, const char *, lc_flags_t, void *), void *extra) { struct lc_varhandler_st *newhandler = NULL; newhandler = malloc(sizeof(*newhandler)); if (newhandler == NULL) { return(-1); } if (var == NULL) { newhandler->var = NULL; } else { newhandler->var = strdup(var); } newhandler->mode = LC_MODE_CALLBACK; newhandler->type = type; newhandler->callback = callback; newhandler->opt = opt; newhandler->extra = extra; newhandler->_next = varhandlers; varhandlers = newhandler; return(0); } int lc_register_var(const char *var, lc_var_type_t type, void *data, char opt) { struct lc_varhandler_st *newhandler = NULL; newhandler = malloc(sizeof(*newhandler)); if (newhandler == NULL) { return(-1); } if (var == NULL) { newhandler->var = NULL; } else { newhandler->var = strdup(var); } newhandler->mode = LC_MODE_VAR; newhandler->type = type; newhandler->data = data; newhandler->opt = opt; newhandler->extra = NULL; newhandler->_next = varhandlers; varhandlers = newhandler; return(0); } static int lc_process_file(const char *appname, const char *pathname, lc_conf_type_t type) { int chkretval = 0; switch (type) { case LC_CONF_SECTION: chkretval = lc_process_conf_section(appname, pathname); break; case LC_CONF_APACHE: chkretval = lc_process_conf_apache(appname, pathname); break; case LC_CONF_COLON: chkretval = lc_process_conf_colon(appname, pathname); break; case LC_CONF_EQUAL: chkretval = lc_process_conf_equal(appname, pathname); break; case LC_CONF_SPACE: chkretval = lc_process_conf_space(appname, pathname); break; case LC_CONF_XML: chkretval = lc_process_conf_xml(appname, pathname); break; default: chkretval = -1; lc_errno = LC_ERR_INVDATA; break; } return(chkretval); } static int lc_process_files(const char *appname, lc_conf_type_t type, const char *extraconfig) { struct passwd *pwinfo = NULL; char configfiles[3][13][512] = {{{0}}}; char *configfile = NULL; char *homedir = NULL; int configsetidx = 0, configidx = 0; int chkretval = 0, retval = 0; if (extraconfig != NULL) { snprintf(configfiles[0][0], sizeof(**configfiles) - 1, "%s", extraconfig); } snprintf(configfiles[1][0], sizeof(**configfiles) - 1, "/etc/%s.cfg", appname); snprintf(configfiles[1][1], sizeof(**configfiles) - 1, "/etc/%s.conf", appname); snprintf(configfiles[1][2], sizeof(**configfiles) - 1, "/etc/%s/%s.cfg", appname, appname); snprintf(configfiles[1][3], sizeof(**configfiles) - 1, "/etc/%s/%s.conf", appname, appname); snprintf(configfiles[1][4], sizeof(**configfiles) - 1, "/usr/etc/%s.cfg", appname); snprintf(configfiles[1][5], sizeof(**configfiles) - 1, "/usr/etc/%s.conf", appname); snprintf(configfiles[1][6], sizeof(**configfiles) - 1, "/usr/etc/%s/%s.cfg", appname, appname); snprintf(configfiles[1][7], sizeof(**configfiles) - 1, "/usr/etc/%s/%s.conf", appname, appname); snprintf(configfiles[1][8], sizeof(**configfiles) - 1, "/usr/local/etc/%s.cfg", appname); snprintf(configfiles[1][9], sizeof(**configfiles) - 1, "/usr/local/etc/%s.conf", appname); snprintf(configfiles[1][10], sizeof(**configfiles) - 1, "/usr/local/etc/%s/%s.cfg", appname, appname); snprintf(configfiles[1][11], sizeof(**configfiles) - 1, "/usr/local/etc/%s/%s.conf", appname, appname); if (getuid() != 0) { homedir = getenv("HOME"); if (homedir == NULL) { pwinfo = getpwuid(getuid()); if (pwinfo != NULL) { homedir = pwinfo->pw_dir; } } if (homedir != NULL) { if (strcmp(homedir, "/") != 0 && access(homedir, R_OK|W_OK|X_OK) == 0) { snprintf(configfiles[2][0], sizeof(**configfiles) - 1, "%s/.%src", homedir, appname); snprintf(configfiles[2][1], sizeof(**configfiles) - 1, "%s/.%s.cfg", homedir, appname); snprintf(configfiles[2][2], sizeof(**configfiles) - 1, "%s/.%s.conf", homedir, appname); snprintf(configfiles[2][3], sizeof(**configfiles) - 1, "%s/.%s/%s.cfg", homedir, appname, appname); snprintf(configfiles[2][4], sizeof(**configfiles) - 1, "%s/.%s/%s.conf", homedir, appname, appname); snprintf(configfiles[2][5], sizeof(**configfiles) - 1, "%s/.%s/config", homedir, appname); } } } for (configsetidx = 0; configsetidx < 3; configsetidx++) { for (configidx = 0; configidx < 13; configidx++) { configfile = configfiles[configsetidx][configidx]; if (configfile[0] == '\0') { break; } if (access(configfile, R_OK) == 0) { chkretval = lc_process_file(appname, configfile, type); if (chkretval < 0) { retval = -1; } break; } } } return(retval); } static void lc_cleanup(void) { struct lc_varhandler_st *handler = NULL, *next = NULL; handler = varhandlers; while (handler != NULL) { if (handler->var != NULL) { free(handler->var); } next = handler->_next; free(handler); handler = next; } return; } int lc_process(int argc, char **argv, const char *appname, lc_conf_type_t type, const char *extra) { int retval = 0, chkretval = 0; /* Handle config files. */ chkretval = lc_process_files(appname, type, extra); if (chkretval < 0) { retval = -1; } /* Handle environment variables.*/ chkretval = lc_process_environment(appname); if (chkretval < 0) { retval = -1; } /* Handle command line arguments */ chkretval = lc_process_cmdline(argc, argv); if (chkretval < 0) { retval = -1; } /* Free our structures. */ lc_cleanup(); return(retval); } lc_err_t lc_geterrno(void) { lc_err_t retval; retval = lc_errno; lc_errno = LC_ERR_NONE; return(retval); } char *lc_geterrstr(void) { char *retval = NULL; switch (lc_errno) { case LC_ERR_NONE: retval = "Success"; break; case LC_ERR_INVCMD: retval = "Invalid command"; break; case LC_ERR_INVSECTION: retval = "Invalid section"; break; case LC_ERR_INVDATA: retval = "Invalid application data (internal error)"; break; case LC_ERR_BADFORMAT: retval = "Bad data specified or incorrect format."; break; case LC_ERR_CANTOPEN: retval = "Can't open file."; break; case LC_ERR_CALLBACK: retval = "Error return from application handler."; break; case LC_ERR_ENOMEM: retval = "Insuffcient memory."; break; } lc_errno = LC_ERR_NONE; if (retval != NULL) { return(retval); } return("Unknown error"); }