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-rw-r--r--src/app_fetch.c355
1 files changed, 355 insertions, 0 deletions
diff --git a/src/app_fetch.c b/src/app_fetch.c
new file mode 100644
index 0000000..677fabf
--- /dev/null
+++ b/src/app_fetch.c
@@ -0,0 +1,355 @@
+/* app_fetch.c - Alpine Package Keeper (APK)
+ *
+ * Copyright (C) 2005-2008 Natanael Copa <n@tanael.org>
+ * Copyright (C) 2008-2011 Timo Teräs <timo.teras@iki.fi>
+ * All rights reserved.
+ *
+ * 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. See http://www.gnu.org/ for details.
+ */
+
+#include <stdio.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <unistd.h>
+#include <errno.h>
+#include <zlib.h>
+
+#include "apk_applet.h"
+#include "apk_database.h"
+#include "apk_io.h"
+#include "apk_print.h"
+#include "apk_solver.h"
+
+#define FETCH_RECURSIVE 1
+#define FETCH_STDOUT 2
+#define FETCH_LINK 4
+
+struct fetch_ctx {
+ unsigned int flags;
+ int outdir_fd, errors;
+ struct apk_database *db;
+ size_t done, total;
+ struct apk_dependency_array *world;
+};
+
+static int cup(void)
+{
+ /* compressed/uncompressed size is 259/1213 */
+ static unsigned char z[] = {
+ 0x78,0x9c,0x9d,0x94,0x3d,0x8e,0xc4,0x20,0x0c,0x85,0xfb,0x9c,
+ 0xc2,0x72,0x43,0x46,0x8a,0x4d,0x3f,0x67,0x89,0x64,0x77,0x2b,
+ 0x6d,0xbb,0x6d,0x0e,0x3f,0xc6,0x84,0x4d,0x08,0x84,0x55,0xd6,
+ 0xa2,0xe0,0xef,0x7b,0x36,0xe1,0x11,0x80,0x6e,0xcc,0x53,0x7f,
+ 0x3e,0xc5,0xeb,0xcf,0x1d,0x20,0x22,0xcc,0x3c,0x53,0x8e,0x17,
+ 0xd9,0x80,0x6d,0xee,0x0e,0x61,0x42,0x3c,0x8b,0xcf,0xc7,0x12,
+ 0x22,0x71,0x8b,0x31,0x05,0xd5,0xb0,0x11,0x4b,0xa7,0x32,0x2f,
+ 0x80,0x69,0x6b,0xb0,0x98,0x40,0xe2,0xcd,0xba,0x6a,0xba,0xe4,
+ 0x65,0xed,0x61,0x23,0x44,0xb5,0x95,0x06,0x8b,0xde,0x6c,0x61,
+ 0x70,0xde,0x0e,0xb6,0xed,0xc4,0x43,0x0c,0x56,0x6f,0x8f,0x31,
+ 0xd0,0x35,0xb5,0xc7,0x58,0x06,0xff,0x81,0x49,0x84,0xb8,0x0e,
+ 0xb1,0xd8,0xc1,0x66,0x31,0x0e,0x46,0x5c,0x43,0xc9,0xef,0xe5,
+ 0xdc,0x63,0xb1,0xdc,0x67,0x6d,0x31,0xb3,0xc9,0x69,0x74,0x87,
+ 0xc7,0xa3,0x1b,0x6a,0xb3,0xbd,0x2f,0x3b,0xd5,0x0c,0x57,0x3b,
+ 0xce,0x7c,0x5e,0xe5,0x48,0xd0,0x48,0x01,0x92,0x49,0x8b,0xf7,
+ 0xfc,0x58,0x67,0xb3,0xf7,0x14,0x20,0x5c,0x4c,0x9e,0xcc,0xeb,
+ 0x78,0x7e,0x64,0xa6,0xa1,0xf5,0xb2,0x70,0x38,0x09,0x7c,0x7f,
+ 0xfd,0xc0,0x8a,0x4e,0xc8,0x55,0xe8,0x12,0xe2,0x9f,0x1a,0xb1,
+ 0xb9,0x82,0x52,0x02,0x7a,0xe5,0xf9,0xd9,0x88,0x47,0x79,0x3b,
+ 0x46,0x61,0x27,0xf9,0x51,0xb1,0x17,0xb0,0x2c,0x0e,0xd5,0x39,
+ 0x2d,0x96,0x25,0x27,0xd6,0xd1,0x3f,0xa5,0x08,0xe1,0x9e,0x4e,
+ 0xa7,0xe9,0x03,0xb1,0x0a,0xb6,0x75
+ };
+ unsigned char buf[1213];
+ unsigned long len = sizeof(buf);
+
+ uncompress(buf, &len, z, sizeof(z));
+ return write(STDOUT_FILENO, buf, len) != len;
+}
+
+static int option_parse_applet(void *ctx, struct apk_db_options *dbopts, int optch, const char *optarg)
+{
+ struct fetch_ctx *fctx = (struct fetch_ctx *) ctx;
+
+ switch (optch) {
+ case 'R':
+ fctx->flags |= FETCH_RECURSIVE;
+ break;
+ case 's':
+ fctx->flags |= FETCH_STDOUT;
+ break;
+ case 'L':
+ fctx->flags |= FETCH_LINK;
+ break;
+ case 'o':
+ fctx->outdir_fd = openat(AT_FDCWD, optarg, O_RDONLY | O_CLOEXEC);
+ break;
+ default:
+ return -ENOTSUP;
+ }
+ return 0;
+}
+
+static const struct apk_option options_applet[] = {
+ { 'L', "link" },
+ { 'R', "recursive" },
+ { 0x104, "simulate" },
+ { 's', "stdout" },
+ { 'o', "output", required_argument, "DIR" },
+};
+
+static const struct apk_option_group optgroup_applet = {
+ .name = "Fetch",
+ .options = options_applet,
+ .num_options = ARRAY_SIZE(options_applet),
+ .parse = option_parse_applet,
+};
+
+static void progress_cb(void *pctx, size_t bytes_done)
+{
+ struct fetch_ctx *ctx = (struct fetch_ctx *) pctx;
+ apk_print_progress(ctx->done + bytes_done, ctx->total);
+}
+
+static int fetch_package(apk_hash_item item, void *pctx)
+{
+ struct fetch_ctx *ctx = (struct fetch_ctx *) pctx;
+ struct apk_database *db = ctx->db;
+ struct apk_package *pkg = (struct apk_package *) item;
+ struct apk_istream *is;
+ struct apk_repository *repo;
+ struct apk_file_info fi;
+ char url[PATH_MAX], filename[256];
+ int r, fd, urlfd;
+
+ if (!pkg->marked)
+ return 0;
+
+ repo = apk_db_select_repo(db, pkg);
+ if (repo == NULL) {
+ r = -ENOPKG;
+ goto err;
+ }
+
+ if (snprintf(filename, sizeof(filename), PKG_FILE_FMT, PKG_FILE_PRINTF(pkg)) >= sizeof(filename)) {
+ r = -ENOBUFS;
+ goto err;
+ }
+
+ if (!(ctx->flags & FETCH_STDOUT)) {
+ if (apk_fileinfo_get(ctx->outdir_fd, filename, APK_CHECKSUM_NONE, &fi) == 0 &&
+ fi.size == pkg->size)
+ return 0;
+ }
+
+ apk_message("Downloading " PKG_VER_FMT, PKG_VER_PRINTF(pkg));
+ if (apk_flags & APK_SIMULATE)
+ return 0;
+
+ r = apk_repo_format_item(db, repo, pkg, &urlfd, url, sizeof(url));
+ if (r < 0)
+ goto err;
+
+ if (ctx->flags & FETCH_STDOUT) {
+ fd = STDOUT_FILENO;
+ } else {
+ if ((ctx->flags & FETCH_LINK) && urlfd >= 0) {
+ if (linkat(urlfd, url,
+ ctx->outdir_fd, filename,
+ AT_SYMLINK_FOLLOW) == 0)
+ return 0;
+ }
+ fd = openat(ctx->outdir_fd, filename,
+ O_CREAT|O_RDWR|O_TRUNC|O_CLOEXEC, 0644);
+ if (fd < 0) {
+ r = -errno;
+ goto err;
+ }
+ }
+
+ is = apk_istream_from_fd_url(urlfd, url);
+ if (IS_ERR_OR_NULL(is)) {
+ r = PTR_ERR(is) ?: -EIO;
+ goto err;
+ }
+
+ r = apk_istream_splice(is, fd, pkg->size, progress_cb, ctx);
+ if (fd != STDOUT_FILENO) {
+ struct apk_file_meta meta;
+ apk_istream_get_meta(is, &meta);
+ apk_file_meta_to_fd(fd, &meta);
+ close(fd);
+ }
+ apk_istream_close(is);
+
+ if (r != pkg->size) {
+ unlinkat(ctx->outdir_fd, filename, 0);
+ if (r >= 0) r = -EIO;
+ goto err;
+ }
+
+ ctx->done += pkg->size;
+ return 0;
+
+err:
+ apk_error(PKG_VER_FMT ": %s", PKG_VER_PRINTF(pkg), apk_error_str(r));
+ ctx->errors++;
+ return 0;
+}
+
+static void mark_package(struct fetch_ctx *ctx, struct apk_package *pkg)
+{
+ if (pkg == NULL || pkg->marked)
+ return;
+ ctx->total += pkg->size;
+ pkg->marked = 1;
+}
+
+static void mark_error(struct fetch_ctx *ctx, const char *match, struct apk_name *name)
+{
+ if (strchr(match, '*') != NULL)
+ return;
+
+ apk_message("%s: unable to select package (or its dependencies)", name ? name->name : match);
+ ctx->errors++;
+}
+
+static void mark_name_flags(struct apk_database *db, const char *match, struct apk_name *name, void *pctx)
+{
+ struct fetch_ctx *ctx = (struct fetch_ctx *) pctx;
+ struct apk_dependency dep = (struct apk_dependency) {
+ .name = name,
+ .version = &apk_null_blob,
+ .result_mask = APK_DEPMASK_ANY,
+ };
+
+ if (!IS_ERR_OR_NULL(name)) {
+ name->auto_select_virtual = 1;
+ apk_deps_add(&ctx->world, &dep);
+ } else {
+ ctx->errors++;
+ mark_error(ctx, match, name);
+ }
+}
+
+static void mark_names_recursive(struct apk_database *db, struct apk_string_array *args, void *pctx)
+{
+ struct fetch_ctx *ctx = (struct fetch_ctx *) pctx;
+ struct apk_changeset changeset = {};
+ struct apk_change *change;
+ int r;
+
+ r = apk_solver_solve(db, APK_SOLVERF_IGNORE_CONFLICT, ctx->world, &changeset);
+ if (r == 0) {
+ foreach_array_item(change, changeset.changes)
+ mark_package(ctx, change->new_pkg);
+ } else {
+ apk_solver_print_errors(db, &changeset, ctx->world);
+ ctx->errors++;
+ }
+ apk_change_array_free(&changeset.changes);
+}
+
+static void mark_name(struct apk_database *db, const char *match, struct apk_name *name, void *ctx)
+{
+ struct apk_package *pkg = NULL;
+ struct apk_provider *p;
+
+ if (!name) goto err;
+
+ foreach_array_item(p, name->providers)
+ if (pkg == NULL || apk_pkg_version_compare(p->pkg, pkg) == APK_VERSION_GREATER)
+ pkg = p->pkg;
+
+ if (!pkg) goto err;
+ mark_package(ctx, pkg);
+ return;
+
+err:
+ mark_error(ctx, match, name);
+}
+
+static int purge_package(void *pctx, int dirfd, const char *filename)
+{
+ char tmp[PATH_MAX];
+ struct fetch_ctx *ctx = (struct fetch_ctx *) pctx;
+ struct apk_database *db = ctx->db;
+ struct apk_provider *p0;
+ struct apk_name *name;
+ apk_blob_t b = APK_BLOB_STR(filename), bname, bver;
+ size_t l;
+
+ if (apk_pkg_parse_name(b, &bname, &bver)) return 0;
+ name = apk_db_get_name(db, bname);
+ if (!name) return 0;
+
+ foreach_array_item(p0, name->providers) {
+ if (p0->pkg->name != name) continue;
+ l = snprintf(tmp, sizeof tmp, PKG_FILE_FMT, PKG_FILE_PRINTF(p0->pkg));
+ if (l > sizeof tmp) continue;
+ if (apk_blob_compare(b, APK_BLOB_PTR_LEN(tmp, l)) != 0) continue;
+ if (p0->pkg->marked) return 0;
+ break;
+ }
+
+ apk_message("Purging %s", filename);
+ if (apk_flags & APK_SIMULATE)
+ return 0;
+
+ unlinkat(dirfd, filename, 0);
+ return 0;
+}
+
+static int fetch_main(void *pctx, struct apk_database *db, struct apk_string_array *args)
+{
+ struct fetch_ctx *ctx = (struct fetch_ctx *) pctx;
+
+ if (ctx->flags & FETCH_STDOUT) {
+ apk_flags &= ~APK_PROGRESS;
+ apk_verbosity = 0;
+ }
+
+ if (ctx->outdir_fd == 0)
+ ctx->outdir_fd = AT_FDCWD;
+
+ if ((args->num == 1) && (strcmp(args->item[0], "coffee") == 0)) {
+ if (apk_force) return cup();
+ apk_message("Go and fetch your own coffee.");
+ return 0;
+ }
+
+ ctx->db = db;
+
+ if (ctx->flags & FETCH_RECURSIVE) {
+ apk_dependency_array_init(&ctx->world);
+ apk_name_foreach_matching(db, args, apk_foreach_genid(), mark_name_flags, ctx);
+ if (ctx->errors == 0)
+ mark_names_recursive(db, args, ctx);
+ apk_dependency_array_free(&ctx->world);
+ } else {
+ apk_name_foreach_matching(db, args, apk_foreach_genid(), mark_name, ctx);
+ }
+ if (!ctx->errors)
+ apk_hash_foreach(&db->available.packages, fetch_package, ctx);
+
+ /* Remove packages not matching download spec from the output directory */
+ if (!ctx->errors && (apk_flags & APK_PURGE) &&
+ !(ctx->flags & FETCH_STDOUT) && ctx->outdir_fd > 0)
+ apk_dir_foreach_file(ctx->outdir_fd, purge_package, ctx);
+
+ return ctx->errors;
+}
+
+static struct apk_applet apk_fetch = {
+ .name = "fetch",
+ .arguments = "PACKAGE...",
+ .open_flags = APK_OPENF_READ | APK_OPENF_NO_STATE,
+ .command_groups = APK_COMMAND_GROUP_REPO,
+ .context_size = sizeof(struct fetch_ctx),
+ .optgroups = { &optgroup_global, &optgroup_applet },
+ .main = fetch_main,
+};
+
+APK_DEFINE_APPLET(apk_fetch);
+