diff options
Diffstat (limited to 'lib/dpkg/options.c')
| -rw-r--r-- | lib/dpkg/options.c | 326 |
1 files changed, 326 insertions, 0 deletions
diff --git a/lib/dpkg/options.c b/lib/dpkg/options.c new file mode 100644 index 0000000..4244b7d --- /dev/null +++ b/lib/dpkg/options.c @@ -0,0 +1,326 @@ +/* + * libdpkg - Debian packaging suite library routines + * options.c - option parsing functions + * + * Copyright © 1994,1995 Ian Jackson <ijackson@chiark.greenend.org.uk> + * Copyright © 2000,2002 Wichert Akkerman <wichert@deephackmode.org> + * Copyright © 2008-2015 Guillem Jover <guillem@debian.org> + * + * This is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <https://www.gnu.org/licenses/>. + */ + +#include <config.h> +#include <compat.h> + +#include <errno.h> +#include <limits.h> +#include <string.h> +#include <dirent.h> +#include <stdarg.h> +#include <stdlib.h> + +#include <dpkg/i18n.h> +#include <dpkg/c-ctype.h> +#include <dpkg/dpkg.h> +#include <dpkg/string.h> +#include <dpkg/options.h> + +static const char *printforhelp; + +void +badusage(const char *fmt, ...) +{ + char *buf = NULL; + va_list args; + + va_start(args, fmt); + m_vasprintf(&buf, fmt, args); + va_end(args); + + ohshit("%s\n\n%s", buf, gettext(printforhelp)); +} + +static void DPKG_ATTR_NORET DPKG_ATTR_PRINTF(3) +config_error(const char *file_name, int line_num, const char *fmt, ...) +{ + char *buf = NULL; + va_list args; + + va_start(args, fmt); + m_vasprintf(&buf, fmt, args); + va_end(args); + + ohshit(_("configuration error: %s:%d: %s"), file_name, line_num, buf); +} + +static void +dpkg_options_load_file(const char *fn, const struct cmdinfo *cmdinfos) +{ + FILE *file; + int line_num = 0; + char linebuf[MAX_CONFIG_LINE]; + + file= fopen(fn, "r"); + if (!file) { + if (errno==ENOENT) + return; + warning(_("failed to open configuration file '%.255s' for reading: %s"), + fn, strerror(errno)); + return; + } + + while (fgets(linebuf, sizeof(linebuf), file)) { + char *opt; + const struct cmdinfo *cip; + + line_num++; + + str_rtrim_spaces(linebuf, linebuf + strlen(linebuf)); + + if ((linebuf[0] == '#') || (linebuf[0] == '\0')) + continue; + for (opt = linebuf; c_isalnum(*opt) || *opt == '-'; opt++) ; + if (*opt == '\0') + opt=NULL; + else { + *opt++ = '\0'; + if (*opt=='=') opt++; + while (c_isspace(*opt)) + opt++; + + opt = str_strip_quotes(opt); + if (opt == NULL) + config_error(fn, line_num, _("unbalanced quotes in '%s'"), linebuf); + } + + for (cip=cmdinfos; cip->olong || cip->oshort; cip++) { + int l; + + if (!cip->olong) continue; + if (strcmp(cip->olong, linebuf) == 0) + break; + l=strlen(cip->olong); + if ((cip->takesvalue==2) && (linebuf[l]=='-') && + !opt && strncmp(linebuf, cip->olong, l) == 0) { + opt=linebuf+l+1; + break; + } + } + + if (!cip->olong) + config_error(fn, line_num, _("unknown option '%s'"), linebuf); + + if (cip->takesvalue) { + if (!opt) + config_error(fn, line_num, _("'%s' needs a value"), linebuf); + if (cip->call) cip->call(cip,opt); + else + *cip->sassignto = m_strdup(opt); + } else { + if (opt) + config_error(fn, line_num, _("'%s' does not take a value"), linebuf); + if (cip->call) cip->call(cip,NULL); + else + *cip->iassignto = cip->arg_int; + } + } + if (ferror(file)) + ohshite(_("read error in configuration file '%.255s'"), fn); + if (fclose(file)) + ohshite(_("error closing configuration file '%.255s'"), fn); +} + +static int +valid_config_filename(const struct dirent *dent) +{ + const char *c; + + if (dent->d_name[0] == '.') + return 0; + + for (c = dent->d_name; *c; c++) + if (!c_isalnum(*c) && *c != '_' && *c != '-') + return 0; + + if (*c == '\0') + return 1; + else + return 0; +} + +static void +dpkg_options_load_dir(const char *prog, const struct cmdinfo *cmdinfos) +{ + char *dirname; + struct dirent **dlist; + int dlist_n, i; + + dirname = str_fmt("%s/%s.cfg.d", CONFIGDIR, prog); + + dlist_n = scandir(dirname, &dlist, valid_config_filename, alphasort); + if (dlist_n < 0) { + if (errno == ENOENT) { + free(dirname); + return; + } else + ohshite(_("error opening configuration directory '%s'"), dirname); + } + + for (i = 0; i < dlist_n; i++) { + char *filename; + + filename = str_fmt("%s/%s", dirname, dlist[i]->d_name); + dpkg_options_load_file(filename, cmdinfos); + + free(dlist[i]); + free(filename); + } + + free(dirname); + free(dlist); +} + +void +dpkg_options_load(const char *prog, const struct cmdinfo *cmdinfos) +{ + char *home, *file; + + dpkg_options_load_dir(prog, cmdinfos); + + file = str_fmt("%s/%s.cfg", CONFIGDIR, prog); + dpkg_options_load_file(file, cmdinfos); + free(file); + + home = getenv("HOME"); + if (home != NULL) { + file = str_fmt("%s/.%s.cfg", home, prog); + dpkg_options_load_file(file, cmdinfos); + free(file); + } +} + +void +dpkg_options_parse(const char *const **argvp, const struct cmdinfo *cmdinfos, + const char *help_str) +{ + const struct cmdinfo *cip; + const char *p, *value; + int l; + + if (**argvp == NULL) + badusage(_("missing program name in argv[0]")); + + printforhelp = help_str; + + ++(*argvp); + while ((p = **argvp) && p[0] == '-' && p[1] != '\0') { + ++(*argvp); + if (strcmp(p, "--") == 0) + break; + if (*++p == '-') { + ++p; value=NULL; + for (cip= cmdinfos; + cip->olong || cip->oshort; + cip++) { + if (!cip->olong) continue; + if (strcmp(p, cip->olong) == 0) + break; + l= strlen(cip->olong); + if (strncmp(p, cip->olong, l) == 0 && + (p[l]== ((cip->takesvalue==2) ? '-' : '='))) { value=p+l+1; break; } + } + if (!cip->olong) badusage(_("unknown option --%s"),p); + if (cip->takesvalue) { + if (!value) { + value= *(*argvp)++; + if (!value) badusage(_("--%s option takes a value"),cip->olong); + } + if (cip->call) cip->call(cip,value); + else *cip->sassignto= value; + } else { + if (value) badusage(_("--%s option does not take a value"),cip->olong); + if (cip->call) cip->call(cip,NULL); + else + *cip->iassignto = cip->arg_int; + } + } else { + while (*p) { + for (cip= cmdinfos; (cip->olong || cip->oshort) && *p != cip->oshort; cip++); + if (!cip->oshort) badusage(_("unknown option -%c"),*p); + p++; + if (cip->takesvalue) { + if (!*p) { + value= *(*argvp)++; + if (!value) badusage(_("-%c option takes a value"),cip->oshort); + } else { + value= p; p=""; + if (*value == '=') value++; + } + if (cip->call) cip->call(cip,value); + else *cip->sassignto= value; + } else { + if (*p == '=') badusage(_("-%c option does not take a value"),cip->oshort); + if (cip->call) cip->call(cip,NULL); + else + *cip->iassignto = cip->arg_int; + } + } + } + } +} + +long +dpkg_options_parse_arg_int(const struct cmdinfo *cmd, const char *str) +{ + long value; + char *end; + + errno = 0; + value = strtol(str, &end, 0); + if (str == end || *end || value < 0 || value > INT_MAX || errno != 0) { + if (cmd->olong) + badusage(_("invalid integer for --%s: '%.250s'"), cmd->olong, str); + else + badusage(_("invalid integer for -%c: '%.250s'"), cmd->oshort, str); + } + + return value; +} + +void +setobsolete(const struct cmdinfo *cip, const char *value) +{ + warning(_("obsolete option '--%s'"), cip->olong); +} + +const struct cmdinfo *cipaction = NULL; + +/* XXX: This function is a hack. */ +static inline int +option_short(int c) +{ + return c ? c : '\b'; +} + +void +setaction(const struct cmdinfo *cip, const char *value) +{ + if (cipaction && cip) + badusage(_("conflicting actions -%c (--%s) and -%c (--%s)"), + option_short(cip->oshort), cip->olong, + option_short(cipaction->oshort), cipaction->olong); + cipaction = cip; + if (cip && cip->takesvalue == 2 && cip->sassignto) + *cipaction->sassignto = value; +} |