#include "install.h" int collect_dependencies(int repofd, struct pkg_dep_list *list) { struct pkg_dep_node *it; pkg_dependency_t dep; uint8_t buffer[257]; pkg_reader_t *rd; pkg_header_t hdr; size_t i; int ret; for (it = list->head; it != NULL; it = it->next) { rd = pkg_reader_open_repo(repofd, it->name); if (rd == NULL) return -1; ret = pkg_reader_read_payload(rd, &hdr, sizeof(hdr)); if (ret < 0) goto fail; if ((size_t)ret < sizeof(hdr)) goto fail_trunc; it->num_deps = le16toh(hdr.num_depends); it->deps = calloc(sizeof(it->deps[0]), it->num_deps); if (it->deps == NULL) goto fail_oom; for (i = 0; i < it->num_deps; ++i) { ret = pkg_reader_read_payload(rd, &dep, sizeof(dep)); if (ret < 0) goto fail; if ((size_t)ret < sizeof(hdr)) goto fail_trunc; ret = pkg_reader_read_payload(rd, buffer, dep.name_length); if (ret < 0) goto fail; if ((size_t)ret < dep.name_length) goto fail_trunc; buffer[dep.name_length] = '\0'; if (strcmp((char *)buffer, it->name) == 0) { fprintf(stderr, "%s: package depends on itself\n", it->name); goto fail; } it->deps[i] = find_pkg(list, (char *)buffer); if (it->deps[i] == NULL) { it->deps[i] = append_pkg(list, (char *)buffer); if (it->deps[i] == NULL) goto fail; } } pkg_reader_close(rd); } return 0; fail_trunc: fprintf(stderr, "%s: truncated header record\n", pkg_reader_get_filename(rd)); goto fail; fail_oom: fputs("out of memory\n", stderr); goto fail; fail: pkg_reader_close(rd); return -1; }