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configparser.c
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configparser.c
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/* This file is part of "reprepro"
* Copyright (C) 2007 Bernhard R. Link
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program 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, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02111-1301 USA
*/
#include <config.h>
#include <errno.h>
#include <assert.h>
#include <limits.h>
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <malloc.h>
#include <dirent.h>
#include "error.h"
#include "names.h"
#include "atoms.h"
#include "filecntl.h"
#include "configparser.h"
struct configiterator {
FILE *f;
unsigned int startline, line, column, markerline, markercolumn;
const char *filename;
const char *chunkname;
bool eol;
};
const char *config_filename(const struct configiterator *iter) {
return iter->filename;
}
unsigned int config_line(const struct configiterator *iter) {
return iter->line;
}
unsigned int config_column(const struct configiterator *iter) {
return iter->column;
}
unsigned int config_firstline(const struct configiterator *iter) {
return iter->startline;
}
unsigned int config_markerline(const struct configiterator *iter) {
return iter->markerline;
}
unsigned int config_markercolumn(const struct configiterator *iter) {
return iter->markercolumn;
}
void config_overline(struct configiterator *iter) {
int c;
while (!iter->eol) {
c = fgetc(iter->f);
if (c == '#') {
do {
c = fgetc(iter->f);
} while (c != EOF && c != '\n');
}
if (c == EOF || c == '\n')
iter->eol = true;
else
iter->column++;
}
}
bool config_nextline(struct configiterator *iter) {
int c;
assert (iter->eol);
c = fgetc(iter->f);
while (c == '#') {
do {
c = fgetc(iter->f);
} while (c != EOF && c != '\n');
iter->line++;
c = fgetc(iter->f);
}
if (c == EOF)
return false;
if (c == ' ' || c == '\t') {
iter->line++;
iter->column = 1;
iter->eol = false;
return true;
}
(void)ungetc(c, iter->f);
return false;
}
retvalue linkedlistfinish(UNUSED(void *privdata), void *this, void **last, UNUSED(bool complete), UNUSED(struct configiterator *dummy3)) {
*last = this;
return RET_NOTHING;
}
static inline retvalue finishchunk(configfinishfunction finishfunc, void *privdata, struct configiterator *iter, const struct configfield *fields, size_t fieldcount, bool *found, void **this, void **last, bool complete) {
size_t i;
retvalue r;
if (complete)
for (i = 0 ; i < fieldcount ; i++) {
if (!fields[i].required)
continue;
if (found[i])
continue;
fprintf(stderr,
"Error parsing config file %s, line %u:\n"
"Required field '%s' not found in\n"
"%s starting in line %u and ending in line %u.\n",
iter->filename, iter->line,
fields[i].name, iter->chunkname,
iter->startline, iter->line-1);
(void)finishfunc(privdata, *this, last, false, iter);
*this = NULL;
return RET_ERROR_MISSING;
}
r = finishfunc(privdata, *this, last, complete, iter);
*this = NULL;
return r;
}
char *configfile_expandname(const char *filename, char *fndup) {
const char *fromdir;
char *n;
assert (fndup == NULL || fndup == filename);
if (filename[0] == '/' || (filename[0] == '.' && filename[1] == '/'))
return fndup?fndup:strdup(filename);
if (filename[0] == '~' && filename[1] == '/') {
n = calc_dirconcat(getenv("HOME"), filename + 2);
free(fndup);
return n;
}
if (filename[0] != '+' || filename[1] == '\0' || filename[2] != '/') {
n = calc_dirconcat(global.confdir, filename);
free(fndup);
return n;
}
if (filename[1] == 'b') {
fromdir = global.basedir;
} else if (filename[1] == 'o') {
fromdir = global.outdir;
} else if (filename[1] == 'c') {
fromdir = global.confdir;
} else {
fprintf(stderr, "Warning: strange filename '%s'!\n",
filename);
return fndup?fndup:strdup(filename);
}
n = calc_dirconcat(fromdir, filename + 3);
free(fndup);
return n;
}
static retvalue configfile_parse_multi(/*@only@*/char *, bool, configinitfunction, configfinishfunction, const char *, const struct configfield *, size_t, void *, int, void **, struct strlist *);
static retvalue configfile_parse_single(/*@only@*/char *filename, bool ignoreunknown, configinitfunction initfunc, configfinishfunction finishfunc, const char *chunkname, const struct configfield *fields, size_t fieldcount, void *privdata, int depth, void **last_p, struct strlist *filenames) {
bool found[fieldcount];
void *this = NULL;
char key[100];
size_t keylen;
int c, ret;
size_t i;
struct configiterator iter;
retvalue result, r;
bool afterinclude = false;
if (strlist_in(filenames, filename)) {
if (verbose >= 0) {
fprintf(stderr,
"Ignoring subsequent inclusion of '%s'!\n", filename);
}
free(filename);
return RET_NOTHING;
}
iter.filename = filename;
r = strlist_add(filenames, filename);
if (RET_WAS_ERROR(r))
return r;
iter.chunkname = chunkname;
iter.line = 0;
iter.column = 0;
iter.f = fopen(iter.filename, "r");
if (iter.f == NULL) {
int e = errno;
fprintf(stderr, "Error opening config file '%s': %s(%d)\n",
iter.filename, strerror(e), e);
return RET_ERRNO(e);
}
result = RET_NOTHING;
do {
iter.line++;
iter.column = 1;
c = fgetc(iter.f);
while (c == '#') {
do {
c = fgetc(iter.f);
} while (c != EOF && c != '\n');
iter.line++;
c = fgetc(iter.f);
}
if (c == '\r') {
do {
c = fgetc(iter.f);
} while (c == '\r');
if (c != EOF && c != '\n') {
fprintf(stderr,
"%s:%u: error parsing configuration file: CR without following LF!\n",
iter.filename, iter.line);
result = RET_ERROR;
break;
}
}
if (c == EOF)
break;
if (c == '\n') {
afterinclude = false;
/* Ignore multiple emptye lines */
if (this == NULL)
continue;
/* finish this chunk, to get ready for the next: */
r = finishchunk(finishfunc, privdata, &iter,
fields, fieldcount, found,
&this, last_p, true);
if (RET_WAS_ERROR(r)) {
result = r;
break;
}
continue;
}
if (afterinclude) {
fprintf(stderr,
"Warning parsing %s, line %u: no empty line after '!include'-sequence"
" might cause ambiguity in the future!\n",
iter.filename, iter.line);
afterinclude = false;
}
if (c == '!') {
keylen = 0;
while ((c = fgetc(iter.f)) != EOF && c >= 'a' && c <= 'z') {
iter.column++;
key[keylen++] = c;
if (keylen >= 10)
break;
}
if (c != ':') {
fprintf(stderr,
"Error parsing %s, line %u: invalid !-sequence!\n",
iter.filename, iter.line);
result = RET_ERROR;
break;
}
iter.column++;
if (keylen == 7 && memcmp(key, "include", 7) == 0) {
char *filetoinclude;
if (this != NULL) {
fprintf(stderr,
"Error parsing %s, line %u: '!include' statement within unterminated %s!\n"
"(perhaps you forgot to put an empty line before this)\n",
iter.filename, iter.line,
chunkname);
result = RET_ERROR;
break;
}
if (depth > 20) {
fprintf(stderr,
"Error parsing %s, line %u: too many nested '!include' statements!\n",
iter.filename, iter.line);
result = RET_ERROR;
break;
}
r = config_getonlyword(&iter, "!include",
NULL, &filetoinclude);
if (RET_WAS_ERROR(r)) {
result = r;
break;
}
filetoinclude = configfile_expandname(
filetoinclude, filetoinclude);
r = configfile_parse_multi(filetoinclude,
ignoreunknown,
initfunc, finishfunc,
chunkname,
fields, fieldcount,
privdata, depth + 1,
last_p, filenames);
if (RET_WAS_ERROR(r)) {
result = r;
break;
}
afterinclude = true;
} else {
key[keylen] = '\0';
fprintf(stderr,
"Error parsing %s, line %u: unknown !-sequence '%s'!\n",
iter.filename, iter.line, key);
result = RET_ERROR;
break;
}
/* ignore all data left of this field */
do {
config_overline(&iter);
} while (config_nextline(&iter));
continue;
}
if (c == '\0') {
fprintf(stderr,
"Error parsing %s, line %u: \\000 character not allowed in config files!\n",
iter.filename, iter.line);
result = RET_ERROR;
break;
}
if (c == ' ' || c == '\t') {
fprintf(stderr,
"Error parsing %s, line %u: unexpected white space before keyword!\n",
iter.filename, iter.line);
result = RET_ERROR;
break;
}
key[0] = c;
keylen = 1;
while ((c = fgetc(iter.f)) != EOF && c != ':' && c != '\n'
&& c != '#' && c != '\0') {
iter.column++;
if (c == ' ') {
fprintf(stderr,
"Error parsing %s, line %u: Unexpected space in header name!\n",
iter.filename, iter.line);
result = RET_ERROR;
break;
}
if (c == '\t') {
fprintf(stderr,
"Error parsing %s, line %u: Unexpected tabulator character in header name!\n",
iter.filename, iter.line);
result = RET_ERROR;
break;
}
key[keylen++] = c;
if (keylen >= 100)
break;
}
if (c != ':') {
if (c != ' ' && c != '\t')
/* newline or end-of-file */
fprintf(stderr,
"Error parsing %s, line %u, column %u: Colon expected!\n",
iter.filename, iter.line, iter.column);
result = RET_ERROR;
break;
}
if (this == NULL) {
/* new chunk, initialize everything */
r = initfunc(privdata, *last_p, &this);
assert (r != RET_NOTHING);
if (RET_WAS_ERROR(r)) {
result = r;
break;
}
assert (this != NULL);
iter.startline = iter.line;
memset(found, 0, sizeof(found));
}
for (i = 0 ; i < fieldcount ; i++) {
if (keylen != fields[i].namelen)
continue;
if (strncasecmp(key, fields[i].name, keylen) != 0)
continue;
break;
}
if (i >= fieldcount) {
key[keylen] = '\0';
if (!ignoreunknown) {
fprintf(stderr,
"Error parsing %s, line %u: Unknown header '%s'!\n",
iter.filename, iter.line, key);
result = RET_ERROR_UNKNOWNFIELD;
break;
}
if (verbose >= 0)
fprintf(stderr,
"Warning parsing %s, line %u: Unknown header '%s'!\n",
iter.filename, iter.line, key);
} else if (found[i]) {
fprintf(stderr,
"Error parsing %s, line %u: Second appearance of '%s' in the same chunk!\n",
iter.filename, iter.line, fields[i].name);
result = RET_ERROR;
break;
} else
found[i] = true;
do {
c = fgetc(iter.f);
iter.column++;
} while (c == ' ' || c == '\t');
(void)ungetc(c, iter.f);
iter.eol = false;
if (i < fieldcount) {
r = fields[i].setfunc(privdata, fields[i].name, this, &iter);
RET_UPDATE(result, r);
if (RET_WAS_ERROR(r))
break;
}
/* ignore all data left of this field */
do {
config_overline(&iter);
} while (config_nextline(&iter));
} while (true);
if (this != NULL) {
r = finishchunk(finishfunc, privdata, &iter,
fields, fieldcount, found,
&this, last_p,
!RET_WAS_ERROR(result));
RET_UPDATE(result, r);
}
if (ferror(iter.f) != 0) {
int e = errno;
fprintf(stderr, "Error reading config file '%s': %s(%d)\n",
iter.filename, strerror(e), e);
r = RET_ERRNO(e);
RET_UPDATE(result, r);
}
ret = fclose(iter.f);
if (ret != 0) {
int e = errno;
fprintf(stderr, "Error closing config file '%s': %s(%d)\n",
iter.filename, strerror(e), e);
r = RET_ERRNO(e);
RET_UPDATE(result, r);
}
return result;
}
static retvalue configfile_parse_multi(/*@only@*/char *fullfilename, bool ignoreunknown, configinitfunction initfunc, configfinishfunction finishfunc, const char *chunkname, const struct configfield *fields, size_t fieldcount, void *privdata, int depth, void **last_p, struct strlist *filenames) {
retvalue result = RET_NOTHING, r;
if (isdirectory(fullfilename)) {
DIR *dir;
struct dirent *de;
int e;
char *subfilename;
dir = opendir(fullfilename);
if (dir == NULL) {
e = errno;
fprintf(stderr,
"Error %d opening directory '%s': %s\n",
e, fullfilename, strerror(e));
free(fullfilename);
return RET_ERRNO(e);
}
while ((errno = 0, de = readdir(dir)) != NULL) {
size_t l;
if (de->d_type != DT_REG && de->d_type != DT_LNK
&& de->d_type != DT_UNKNOWN)
continue;
if (de->d_name[0] == '.')
continue;
l = strlen(de->d_name);
if (l < 5 || strcmp(de->d_name + l - 5, ".conf") != 0)
continue;
subfilename = calc_dirconcat(fullfilename, de->d_name);
if (FAILEDTOALLOC(subfilename)) {
(void)closedir(dir);
free(fullfilename);
return RET_ERROR_OOM;
}
r = configfile_parse_single(subfilename, ignoreunknown,
initfunc, finishfunc,
chunkname, fields, fieldcount, privdata,
depth, last_p, filenames);
RET_UPDATE(result, r);
if (RET_WAS_ERROR(r)) {
(void)closedir(dir);
free(fullfilename);
return r;
}
}
e = errno;
if (e != 0) {
(void)closedir(dir);
fprintf(stderr,
"Error %d reading directory '%s': %s\n",
e, fullfilename, strerror(e));
free(fullfilename);
return RET_ERRNO(e);
}
if (closedir(dir) != 0) {
e = errno;
fprintf(stderr,
"Error %d closing directory '%s': %s\n",
e, fullfilename, strerror(e));
free(fullfilename);
return RET_ERRNO(e);
}
free(fullfilename);
} else {
r = configfile_parse_single(fullfilename, ignoreunknown,
initfunc, finishfunc,
chunkname, fields, fieldcount, privdata,
depth, last_p, filenames);
RET_UPDATE(result, r);
}
return result;
}
retvalue configfile_parse(const char *filename, bool ignoreunknown, configinitfunction initfunc, configfinishfunction finishfunc, const char *chunkname, const struct configfield *fields, size_t fieldcount, void *privdata) {
struct strlist filenames;
void *last = NULL;
retvalue r;
char *fullfilename;
fullfilename = configfile_expandname(filename, NULL);
if (fullfilename == NULL)
return RET_ERROR_OOM;
strlist_init(&filenames);
r = configfile_parse_multi(fullfilename, ignoreunknown,
initfunc, finishfunc,
chunkname, fields, fieldcount, privdata,
0, &last, &filenames);
/* only free filenames last, as they might still be
* referenced while running */
strlist_done(&filenames);
return r;
}
static inline int config_nextchar(struct configiterator *iter) {
int c;
unsigned int realcolumn;
c = fgetc(iter->f);
realcolumn = iter->column + 1;
if (c == '#') {
do {
c = fgetc(iter->f);
realcolumn++;
} while (c != '\n' && c != EOF && c != '\r');
}
if (c == '\r') {
while (c == '\r') {
realcolumn++;
c = fgetc(iter->f);
}
if (c != '\n' && c != EOF) {
fprintf(stderr,
"Warning parsing config file '%s', line '%u', column %u: CR not followed by LF!\n",
config_filename(iter),
config_line(iter),
realcolumn);
}
}
if (c == EOF) {
fprintf(stderr,
"Warning parsing config file '%s', line '%u': File ending without final LF!\n",
config_filename(iter),
config_line(iter));
/* fake a proper text file: */
c = '\n';
}
iter->column++;
if (c == '\n')
iter->eol = true;
return c;
}
static inline int config_nextnonspace(struct configiterator *iter) {
int c;
do {
iter->markerline = iter->line;
iter->markercolumn = iter->column;
if (iter->eol) {
if (!config_nextline(iter))
return EOF;
}
c = config_nextchar(iter);
} while (c == '\n' || c == ' ' || c == '\t');
return c;
}
int config_nextnonspaceinline(struct configiterator *iter) {
int c;
do {
iter->markerline = iter->line;
iter->markercolumn = iter->column;
if (iter->eol)
return EOF;
c = config_nextchar(iter);
if (c == '\n')
return EOF;
} while (c == '\r' || c == ' ' || c == '\t');
return c;
}
#define configparser_errorlast(iter, message, ...) \
fprintf(stderr, "Error parsing %s, line %u, column %u: " message "\n", \
iter->filename, iter->markerline, \
iter->markercolumn, ## __VA_ARGS__);
#define configparser_error(iter, message, ...) \
fprintf(stderr, "Error parsing %s, line %u, column %u: " message "\n", \
iter->filename, iter->line, \
iter->column, ## __VA_ARGS__);
retvalue config_completeword(struct configiterator *iter, char firstc, char **result_p) {
size_t size = 0, len = 0;
char *value = NULL, *nv;
int c = firstc;
iter->markerline = iter->line;
iter->markercolumn = iter->column;
do {
if (len + 2 >= size) {
nv = realloc(value, size+128);
if (FAILEDTOALLOC(nv)) {
free(value);
return RET_ERROR_OOM;
}
size += 128;
value = nv;
}
value[len] = c;
len++;
c = config_nextchar(iter);
if (c == '\n')
break;
} while (c != ' ' && c != '\t');
assert (len > 0);
assert (len < size);
value[len] = '\0';
nv = realloc(value, len+1);
if (nv == NULL)
*result_p = value;
else
*result_p = nv;
return RET_OK;
}
retvalue config_getwordinline(struct configiterator *iter, char **result_p) {
int c;
c = config_nextnonspaceinline(iter);
if (c == EOF)
return RET_NOTHING;
return config_completeword(iter, c, result_p);
}
retvalue config_getword(struct configiterator *iter, char **result_p) {
int c;
c = config_nextnonspace(iter);
if (c == EOF)
return RET_NOTHING;
return config_completeword(iter, c, result_p);
}
retvalue config_gettimespan(struct configiterator *iter, const char *header, time_t *time_p) {
time_t currentnumber, currentsum = 0;
bool empty = true;
int c;
do {
c = config_nextnonspace(iter);
if (c == EOF) {
if (empty) {
configparser_errorlast(iter,
"Unexpected end of %s header (value expected).", header);
return RET_ERROR;
}
*time_p = currentsum;
return RET_OK;
}
iter->markerline = iter->line;
iter->markercolumn = iter->column;
currentnumber = 0;
if (c < '0' || c > '9') {
configparser_errorlast(iter,
"Unexpected character '%c' where a digit was expected in %s header.",
(char)c, header);
return RET_ERROR;
}
empty = false;
do {
currentnumber *= 10;
currentnumber += (c - '0');
c = config_nextchar(iter);
} while (c >= '0' && c <= '9');
if (c == ' ' || c == '\t' || c == '\n')
c = config_nextnonspace(iter);
if (c == 'y') {
currentnumber *= 365*24*60*60;
} else if (c == 'm') {
currentnumber *= 31*24*60*60;
} else if (c == 'd') {
currentnumber *= 24*60*60;
} else {
currentnumber *= 24*60*60;
if (c != EOF) {
configparser_errorlast(iter,
"Unexpected character '%c' where a 'd','m' or 'y' was expected in %s header.",
(char)c, header);
return RET_ERROR;
}
}
currentsum += currentnumber;
} while (true);
}
retvalue config_getonlyword(struct configiterator *iter, const char *header, checkfunc check, char **result_p) {
char *value;
retvalue r;
r = config_getword(iter, &value);
if (r == RET_NOTHING) {
configparser_errorlast(iter,
"Unexpected end of %s header (value expected).", header);
return RET_ERROR;
}
if (RET_WAS_ERROR(r))
return r;
if (config_nextnonspace(iter) != EOF) {
configparser_error(iter,
"End of %s header expected (but trailing garbage).", header);
free(value);
return RET_ERROR;
}
if (check != NULL) {
const char *errormessage = check(value);
if (errormessage != NULL) {
configparser_errorlast(iter,
"Malformed %s content '%s': %s", header, value, errormessage);
free(value);
checkerror_free(errormessage);
return RET_ERROR;
}
}
*result_p = value;
return RET_OK;
}
retvalue config_getscript(struct configiterator *iter, const char *name, char **value_p) {
char *value, *fullvalue; retvalue r;
r = config_getonlyword(iter, name, NULL, &value);
if (RET_IS_OK(r)) {
assert (value != NULL && value[0] != '\0');
if (value[0] != '/') {
fullvalue = calc_dirconcat(global.confdir, value);
free(value);
} else
fullvalue = value;
if (FAILEDTOALLOC(fullvalue))
return RET_ERROR_OOM;
*value_p = fullvalue;
}
return r;
}
retvalue config_geturl(struct configiterator *iter, const char *header, char **result_p) {
char *value, *p;
retvalue r;
size_t l;
r = config_getword(iter, &value);
if (r == RET_NOTHING) {
configparser_errorlast(iter,
"Unexpected end of %s header (value expected).", header);
return RET_ERROR;
}
if (RET_WAS_ERROR(r))
return r;
// TODO: think about allowing (escaped) spaces...
if (config_nextnonspace(iter) != EOF) {
configparser_error(iter,
"End of %s header expected (but trailing garbage).", header);
free(value);
return RET_ERROR;
}
p = value;
while (*p != '\0' && (*p == '_' || *p == '-' ||
(*p>='a' && *p<='z') || (*p>='A' && *p<='Z') ||
(*p>='0' && *p<='9'))) {
p++;
}
if (*p != ':') {
configparser_errorlast(iter,
"Malformed %s field: no colon (must be method:path).", header);
free(value);
return RET_ERROR;
}
if (p == value) {
configparser_errorlast(iter,
"Malformed %s field: transport method name expected (colon is not allowed to be the first character)!", header);
free(value);
return RET_ERROR;
}
p++;
l = strlen(p);
/* remove one leading slash, as we always add one and some apt-methods
* are confused with //. (end with // if you really want it) */
if (l > 0 && p[l - 1] == '/')
p[l - 1] = '\0';
*result_p = value;
return RET_OK;
}
retvalue config_getuniqwords(struct configiterator *iter, const char *header, checkfunc check, struct strlist *result_p) {
char *value;
retvalue r;
struct strlist data;
const char *errormessage;
strlist_init(&data);
while ((r = config_getword(iter, &value)) != RET_NOTHING) {
if (RET_WAS_ERROR(r)) {
strlist_done(&data);
return r;
}
if (strlist_in(&data, value)) {
configparser_errorlast(iter,
"Unexpected duplicate '%s' within %s header.", value, header);
free(value);
strlist_done(&data);
return RET_ERROR;
} else if (check != NULL && (errormessage = check(value)) != NULL) {
configparser_errorlast(iter,
"Malformed %s element '%s': %s", header, value, errormessage);
checkerror_free(errormessage);
free(value);
strlist_done(&data);
return RET_ERROR;
} else {
r = strlist_add(&data, value);
if (RET_WAS_ERROR(r)) {
strlist_done(&data);
return r;
}
}
}
strlist_move(result_p, &data);
return RET_OK;
}
retvalue config_getinternatomlist(struct configiterator *iter, const char *header, enum atom_type type, checkfunc check, struct atomlist *result_p) {
char *value;
retvalue r;
struct atomlist data;
const char *errormessage;
atom_t atom;
atomlist_init(&data);
while ((r = config_getword(iter, &value)) != RET_NOTHING) {
if (RET_WAS_ERROR(r)) {
atomlist_done(&data);
return r;
}
if (check != NULL && (errormessage = check(value)) != NULL) {
configparser_errorlast(iter,
"Malformed %s element '%s': %s", header, value, errormessage);
checkerror_free(errormessage);
free(value);
atomlist_done(&data);
return RET_ERROR;
}
r = atom_intern(type, value, &atom);
if (RET_WAS_ERROR(r))
return r;
r = atomlist_add_uniq(&data, atom);
if (r == RET_NOTHING) {
configparser_errorlast(iter,
"Unexpected duplicate '%s' within %s header.", value, header);
free(value);
atomlist_done(&data);
return RET_ERROR;
}
free(value);
if (RET_WAS_ERROR(r)) {
atomlist_done(&data);
return r;
}
}
atomlist_move(result_p, &data);
return RET_OK;
}
retvalue config_getatom(struct configiterator *iter, const char *header, enum atom_type type, atom_t *result_p) {
char *value;
retvalue r;
atom_t atom;
r = config_getword(iter, &value);
if (r == RET_NOTHING) {
configparser_errorlast(iter,
"Unexpected empty '%s' field.", header);
r = RET_ERROR_MISSING;
}
if (RET_WAS_ERROR(r))
return r;
atom = atom_find(type, value);
if (!atom_defined(atom)) {
configparser_errorlast(iter,
"Not previously seen %s '%s' within '%s' field.", atomtypes[type], value, header);
free(value);
return RET_ERROR;
}
*result_p = atom;
free(value);
return RET_OK;
}
retvalue config_getatomlist(struct configiterator *iter, const char *header, enum atom_type type, struct atomlist *result_p) {
char *value;
retvalue r;
struct atomlist data;
atom_t atom;
atomlist_init(&data);
while ((r = config_getword(iter, &value)) != RET_NOTHING) {
if (RET_WAS_ERROR(r)) {
atomlist_done(&data);
return r;
}
atom = atom_find(type, value);
if (!atom_defined(atom)) {
configparser_errorlast(iter,
"Not previously seen %s '%s' within '%s' header.", atomtypes[type], value, header);
free(value);
atomlist_done(&data);
return RET_ERROR;
}
r = atomlist_add_uniq(&data, atom);
if (r == RET_NOTHING) {
configparser_errorlast(iter,
"Unexpected duplicate '%s' within %s header.", value, header);
free(value);
atomlist_done(&data);
return RET_ERROR;
}
free(value);
if (RET_WAS_ERROR(r)) {
atomlist_done(&data);
return r;
}
}
atomlist_move(result_p, &data);
return RET_OK;
}
retvalue config_getsplitatoms(struct configiterator *iter, const char *header, enum atom_type type, struct atomlist *from_p, struct atomlist *into_p) {
char *value, *separator;
atom_t origin, destination;
retvalue r;
struct atomlist data_from, data_into;
atomlist_init(&data_from);
atomlist_init(&data_into);
while ((r = config_getword(iter, &value)) != RET_NOTHING) {
if (RET_WAS_ERROR(r)) {
atomlist_done(&data_from);
atomlist_done(&data_into);
return r;
}
separator = strchr(value, '>');
if (separator == NULL) {
separator = value;
destination = atom_find(type, value);
origin = destination;;
} else if (separator == value) {
destination = atom_find(type, separator + 1);
origin = destination;;
} else if (separator[1] == '\0') {
*separator = '\0';
separator = value;
destination = atom_find(type, value);