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-rw-r--r--override.c410
1 files changed, 410 insertions, 0 deletions
diff --git a/override.c b/override.c
new file mode 100644
index 0000000..0a228b7
--- /dev/null
+++ b/override.c
@@ -0,0 +1,410 @@
+/* This file is part of "reprepro"
+ * Copyright (C) 2004,2005,2007,2010 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 <stdio.h>
+#include <stdarg.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <strings.h>
+#include <ctype.h>
+#include <time.h>
+#include <search.h>
+#include "error.h"
+#include "chunks.h"
+#include "sources.h"
+#include "names.h"
+#include "globmatch.h"
+#include "override.h"
+#include "configparser.h"
+
+struct overridedata {
+ struct strlist fields;
+};
+
+struct overridepackage {
+ char *packagename;
+ struct overridedata data;
+};
+
+struct overridepattern {
+ struct overridepattern *next;
+ char *pattern;
+ struct overridedata data;
+};
+
+struct overridefile {
+ /* a <search.h> tree root of struct overridepackage */
+ void *packages;
+ struct overridepattern *patterns;
+};
+
+#ifdef HAVE_TDESTROY
+static void freeoverridepackage(void *n) {
+ struct overridepackage *p = n;
+
+ free(p->packagename);
+ strlist_done(&p->data.fields);
+ free(p);
+}
+#endif
+
+void override_free(struct overridefile *info) {
+ struct overridepattern *i;
+
+ if (info == NULL)
+ return;
+
+#ifdef HAVE_TDESTROY
+ tdestroy(info->packages, freeoverridepackage);
+#endif
+ while ((i = info->patterns) != NULL) {
+ if (i == NULL)
+ return;
+ strlist_done(&i->data.fields);
+ free(i->pattern);
+ info->patterns = i->next;
+ free(i);
+ }
+ free(info);
+}
+
+static bool forbidden_field_name(bool source, const char *field) {
+ if (strcasecmp(field, "Package") == 0)
+ return true;
+ if (strcasecmp(field, "Version") == 0)
+ return true;
+ if (source) {
+ if (strcasecmp(field, "Files") == 0)
+ return true;
+ if (strcasecmp(field, "Directory") == 0)
+ return true;
+ if (strcasecmp(field, "Checksums-Sha256") == 0)
+ return true;
+ if (strcasecmp(field, "Checksums-Sha1") == 0)
+ return true;
+ return false;
+ } else {
+ if (strcasecmp(field, "Filename") == 0)
+ return true;
+ if (strcasecmp(field, "MD5sum") == 0)
+ return true;
+ if (strcasecmp(field, "SHA1") == 0)
+ return true;
+ if (strcasecmp(field, "SHA256") == 0)
+ return true;
+ if (strcasecmp(field, "Size") == 0)
+ return true;
+ return false;
+ }
+}
+
+static retvalue add_override_field(struct overridedata *data, const char *secondpart, const char *thirdpart, bool source) {
+ retvalue r;
+ char *p;
+
+ if (forbidden_field_name(source, secondpart)) {
+ fprintf(stderr,
+"Error: field '%s' not allowed in override files.\n",
+ secondpart);
+ return RET_ERROR;
+ }
+ if (secondpart[0] == '$') {
+ if (strcasecmp(secondpart, "$Delete") == 0) {
+ if (forbidden_field_name(source, thirdpart)) {
+ fprintf(stderr,
+"Error: field '%s' not allowed in override files (not even as to be deleted).\n",
+ thirdpart);
+ return RET_ERROR;
+ }
+ } else if (strcasecmp(secondpart, "$Component") != 0) {
+ fprintf(stderr,
+"Warning: special override field '%s' unknown and will be ignored\n",
+ secondpart);
+ }
+ }
+ p = strdup(secondpart);
+ if (FAILEDTOALLOC(p))
+ return RET_ERROR_OOM;
+ r = strlist_add(&data->fields, p);
+ if (RET_WAS_ERROR(r))
+ return r;
+ p = strdup(thirdpart);
+ if (FAILEDTOALLOC(p))
+ return RET_ERROR_OOM;
+ r = strlist_add(&data->fields, p);
+ return r;
+}
+
+static struct overridepackage *new_package(const char *name) {
+ struct overridepackage *p;
+
+ p = zNEW(struct overridepackage);
+ if (FAILEDTOALLOC(p))
+ return NULL;
+ p->packagename = strdup(name);
+ if (FAILEDTOALLOC(p->packagename)) {
+ free(p);
+ return NULL;
+ }
+ return p;
+}
+
+static int opackage_compare(const void *a, const void *b) {
+ const struct overridepackage *p1 = a, *p2 = b;
+
+ return strcmp(p1->packagename, p2->packagename);
+}
+
+static retvalue add_override(struct overridefile *i, const char *firstpart, const char *secondpart, const char *thirdpart, bool source) {
+ struct overridepackage *pkg, **node;
+ retvalue r;
+ const char *c;
+ struct overridepattern *p, **l;
+
+ c = firstpart;
+ while (*c != '\0' && *c != '*' && *c != '[' && *c != '?')
+ c++;
+ if (*c != '\0') {
+ /* This is a pattern, put into the pattern list */
+ l = &i->patterns;
+ while ((p = *l) != NULL
+ && strcmp(p->pattern, firstpart) != 0) {
+ l = &p->next;
+ }
+ if (p == NULL) {
+ p = zNEW(struct overridepattern);
+ if (FAILEDTOALLOC(p))
+ return RET_ERROR_OOM;
+ p->pattern = strdup(firstpart);
+ if (FAILEDTOALLOC(p->pattern)) {
+ free(p);
+ return RET_ERROR_OOM;
+ }
+ }
+ r = add_override_field(&p->data,
+ secondpart, thirdpart, source);
+ if (RET_WAS_ERROR(r)) {
+ if (*l != p) {
+ free(p->pattern);
+ free(p);
+ }
+ return r;
+ }
+ *l = p;
+ return RET_OK;
+ }
+
+ pkg = new_package(firstpart);
+ if (FAILEDTOALLOC(pkg))
+ return RET_ERROR_OOM;
+ node = tsearch(pkg, &i->packages, opackage_compare);
+ if (FAILEDTOALLOC(node))
+ return RET_ERROR_OOM;
+ if (*node == pkg) {
+ r = strlist_init_n(6, &pkg->data.fields);
+ if (RET_WAS_ERROR(r))
+ return r;
+ } else {
+ free(pkg->packagename);
+ free(pkg);
+ pkg = *node;
+ }
+ return add_override_field(&(*node)->data,
+ secondpart, thirdpart, source);
+}
+
+retvalue override_read(const char *filename, struct overridefile **info, bool source) {
+ struct overridefile *i;
+ FILE *file;
+ char buffer[1001];
+
+ if (filename == NULL) {
+ *info = NULL;
+ return RET_OK;
+ }
+ char *fn = configfile_expandname(filename, NULL);
+ if (FAILEDTOALLOC(fn))
+ return RET_ERROR_OOM;
+ file = fopen(fn, "r");
+ free(fn);
+
+ if (file == NULL) {
+ int e = errno;
+ fprintf(stderr, "Error %d opening override file '%s': %s\n",
+ e, filename, strerror(e));
+ return RET_ERRNO(e);
+ }
+ i = zNEW(struct overridefile);
+ if (FAILEDTOALLOC(i)) {
+ (void)fclose(file);
+ return RET_ERROR_OOM;
+ }
+
+ while (fgets(buffer, 1000, file) != NULL){
+ retvalue r;
+ const char *firstpart, *secondpart, *thirdpart;
+ char *p;
+ size_t l = strlen(buffer);
+
+ if (buffer[l-1] != '\n') {
+ if (l >= 999) {
+ fprintf(stderr,
+"Too long line in '%s'!\n",
+ filename);
+ override_free(i);
+ (void)fclose(file);
+ return RET_ERROR;
+ }
+ fprintf(stderr, "Missing line terminator in '%s'!\n",
+ filename);
+ } else {
+ l--;
+ buffer[l] = '\0';
+ }
+ while (l>0 && xisspace(buffer[l])) {
+ buffer[l] = '\0';
+ l--;
+ }
+ if (l== 0)
+ continue;
+ p = buffer;
+ while (*p !='\0' && xisspace(*p))
+ *(p++)='\0';
+ firstpart = p;
+ while (*p !='\0' && !xisspace(*p))
+ p++;
+ while (*p !='\0' && xisspace(*p))
+ *(p++)='\0';
+ secondpart = p;
+ while (*p !='\0' && !xisspace(*p))
+ p++;
+ while (*p !='\0' && xisspace(*p))
+ *(p++)='\0';
+ thirdpart = p;
+ r = add_override(i, firstpart, secondpart, thirdpart, source);
+ if (RET_WAS_ERROR(r)) {
+ override_free(i);
+ (void)fclose(file);
+ return r;
+ }
+ }
+ (void)fclose(file);
+ if (i->packages != NULL || i->patterns != NULL) {
+ *info = i;
+ return RET_OK;
+ } else {
+ override_free(i);
+ *info = NULL;
+ return RET_NOTHING;
+ }
+}
+
+const struct overridedata *override_search(const struct overridefile *overrides, const char *package) {
+ struct overridepackage pkg, **node;
+ struct overridepattern *p;
+
+ if (overrides == NULL)
+ return NULL;
+
+ pkg.packagename = (char*)package;
+ node = tfind(&pkg, &overrides->packages, opackage_compare);
+ if (node != NULL && *node != NULL)
+ return &(*node)->data;
+ for (p = overrides->patterns ; p != NULL ; p = p->next) {
+ if (globmatch(package, p->pattern))
+ return &p->data;
+ }
+ return NULL;
+}
+
+const char *override_get(const struct overridedata *override, const char *field) {
+ int i;
+
+ if (override == NULL)
+ return NULL;
+
+ for (i = 0 ; i+1 < override->fields.count ; i+=2) {
+ // TODO currently case-sensitiv. warn if otherwise?
+ if (strcmp(override->fields.values[i], field) == 0)
+ return override->fields.values[i+1];
+ }
+ return NULL;
+}
+
+/* add new fields to otherreplaces, but not "Section", or "Priority".
+ * incorporates otherreplaces, or frees them on error,
+ * returns otherreplaces when nothing was to do, NULL on RET_ERROR_OOM*/
+struct fieldtoadd *override_addreplacefields(const struct overridedata *override, struct fieldtoadd *otherreplaces) {
+ int i;
+
+ if (override == NULL)
+ return otherreplaces;
+
+ for (i = 0 ; i+1 < override->fields.count ; i+=2) {
+ if (strcmp(override->fields.values[i],
+ SECTION_FIELDNAME) != 0 &&
+ strcmp(override->fields.values[i],
+ PRIORITY_FIELDNAME) != 0 &&
+ override->fields.values[i][0] != '$') {
+ otherreplaces = addfield_new(
+ override->fields.values[i],
+ override->fields.values[i+1],
+ otherreplaces);
+ if (otherreplaces == NULL)
+ return NULL;
+ } else if (strcasecmp(override->fields.values[i],
+ "$delete") == 0) {
+ otherreplaces = deletefield_new(
+ override->fields.values[i+1], otherreplaces);
+ if (otherreplaces == NULL)
+ return NULL;
+ }
+ }
+ return otherreplaces;
+
+}
+
+retvalue override_allreplacefields(const struct overridedata *override, struct fieldtoadd **fields_p) {
+ int i;
+ struct fieldtoadd *fields = NULL;
+
+ assert (override != NULL);
+
+ for (i = 0 ; i+1 < override->fields.count ; i+=2) {
+ if (override->fields.values[i][0] != '$') {
+ fields = addfield_new(
+ override->fields.values[i],
+ override->fields.values[i+1],
+ fields);
+ if (FAILEDTOALLOC(fields))
+ return RET_ERROR_OOM;
+ } else if (strcasecmp(override->fields.values[i],
+ "$delete") == 0) {
+ fields = deletefield_new(
+ override->fields.values[i+1], fields);
+ if (FAILEDTOALLOC(fields))
+ return RET_ERROR_OOM;
+ }
+ }
+ if (fields == NULL)
+ return RET_NOTHING;
+ *fields_p = fields;
+ return RET_OK;
+}
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