#include <stdio.h>
#include <stdlib.h>
+#include <talloc/talloc.h>
+#include <system/system.h>
+#include <url/url.h>
+#include <log/log.h>
+
#include "paths.h"
-static char *mount_base;
+#define DEVICE_MOUNT_BASE (LOCAL_STATE_DIR "/petitboot/mnt")
-struct device_map {
+struct mount_map {
char *dev, *mnt;
};
-#define DEVICE_MAP_SIZE 32
-static struct device_map device_map[DEVICE_MAP_SIZE];
+static struct mount_map *mount_map;
+static int mount_map_size;
+
+static int is_prefix(const char *str, const char *prefix)
+{
+ return !strncmp(str, prefix, strlen(prefix));
+}
-char *encode_label(const char *label)
+static int is_prefix_ignorecase(const char *str, const char *prefix)
+{
+ return !strncasecmp(str, prefix, strlen(prefix));
+}
+
+const char *mount_base(void)
+{
+ return DEVICE_MOUNT_BASE;
+}
+
+char *encode_label(void *alloc_ctx, const char *label)
{
char *str, *c;
- int i;
+ unsigned int i;
/* the label can be expanded by up to four times */
- str = malloc(strlen(label) * 4 + 1);
+ str = talloc_size(alloc_ctx, strlen(label) * 4 + 1);
c = str;
for (i = 0; i < strlen(label); i++) {
return str;
}
-char *parse_device_path(const char *dev_str, const char *cur_dev)
+char *parse_device_path(void *alloc_ctx,
+ const char *dev_str, const char __attribute__((unused)) *cur_dev)
{
- char *dev, tmp[256], *enc;
+ char *dev, *enc;
- if (!strncasecmp(dev_str, "uuid=", 5)) {
- asprintf(&dev, "/dev/disk/by-uuid/%s", dev_str + 5);
+ if (is_prefix_ignorecase(dev_str, "uuid=")) {
+ dev = talloc_asprintf(alloc_ctx, "/dev/disk/by-uuid/%s",
+ dev_str + strlen("uuid="));
return dev;
}
- if (!strncasecmp(dev_str, "label=", 6)) {
- enc = encode_label(dev_str + 6);
- asprintf(&dev, "/dev/disk/by-label/%s", enc);
- free(enc);
+ if (is_prefix_ignorecase(dev_str, "label=")) {
+ enc = encode_label(NULL, dev_str + strlen("label="));
+ dev = talloc_asprintf(alloc_ctx, "/dev/disk/by-label/%s", enc);
+ talloc_free(enc);
return dev;
}
/* normalise '/dev/foo' to 'foo' for easy comparisons, we'll expand
* back before returning.
*/
- if (!strncmp(dev_str, "/dev/", 5))
- dev_str += 5;
-
- /* PS3 hack: if we're reading from a ps3dx device, and we refer to
- * a sdx device, remap to ps3dx */
- if (cur_dev && !strncmp(cur_dev, "/dev/ps3d", 9)
- && !strncmp(dev_str, "sd", 2)) {
- snprintf(tmp, 255, "ps3d%s", dev_str + 2);
- dev_str = tmp;
- }
+ if (is_prefix(dev_str, "/dev/"))
+ dev_str += strlen("/dev/");
- return join_paths("/dev", dev_str);
+ return join_paths(alloc_ctx, "/dev", dev_str);
}
const char *mountpoint_for_device(const char *dev)
{
int i;
- if (!strncmp(dev, "/dev/", 5))
- dev += 5;
+ if (is_prefix(dev, "/dev/"))
+ dev += strlen("/dev/");
/* check existing entries in the map */
- for (i = 0; (i < DEVICE_MAP_SIZE) && device_map[i].dev; i++)
- if (!strcmp(device_map[i].dev, dev))
- return device_map[i].mnt;
-
- if (i == DEVICE_MAP_SIZE)
- return NULL;
-
- device_map[i].dev = strdup(dev);
- device_map[i].mnt = join_paths(mount_base, dev);
- return device_map[i].mnt;
+ for (i = 0; i < mount_map_size; i++)
+ if (!strcmp(mount_map[i].dev, dev))
+ return mount_map[i].mnt;
+
+ /* no existing entry, create a new one */
+ i = mount_map_size++;
+ mount_map = talloc_realloc(NULL, mount_map,
+ struct mount_map, mount_map_size);
+
+ mount_map[i].dev = talloc_strdup(mount_map, dev);
+ mount_map[i].mnt = join_paths(mount_map, DEVICE_MOUNT_BASE, dev);
+ return mount_map[i].mnt;
}
-char *resolve_path(const char *path, const char *current_dev)
+char *resolve_path(void *alloc_ctx, const char *path, const char *current_dev)
{
+ static const char s_file[] = "file://";
char *ret;
const char *devpath, *sep;
+ /* test for urls */
+
+ if (!strncasecmp(path, s_file, sizeof(s_file) - 1))
+ path += sizeof(s_file) - 1;
+ else if (strstr(path, "://"))
+ return talloc_strdup(alloc_ctx, path);
+
sep = strchr(path, ':');
if (!sep) {
devpath = mountpoint_for_device(current_dev);
- ret = join_paths(devpath, path);
+ ret = join_paths(alloc_ctx, devpath, path);
} else {
/* parse just the device name into dev */
char *tmp, *dev;
- tmp = strndup(path, sep - path);
- dev = parse_device_path(tmp, current_dev);
+ tmp = talloc_strndup(NULL, path, sep - path);
+ dev = parse_device_path(NULL, tmp, current_dev);
devpath = mountpoint_for_device(dev);
- ret = join_paths(devpath, sep + 1);
+ ret = join_paths(alloc_ctx, devpath, sep + 1);
- free(dev);
- free(tmp);
+ talloc_free(dev);
+ talloc_free(tmp);
}
return ret;
}
-void set_mount_base(const char *path)
-{
- if (mount_base)
- free(mount_base);
- mount_base = strdup(path);
-}
-
-char *join_paths(const char *a, const char *b)
+char *join_paths(void *alloc_ctx, const char *a, const char *b)
{
char *full_path;
- full_path = malloc(strlen(a) + strlen(b) + 2);
+ full_path = talloc_array(alloc_ctx, char, strlen(a) + strlen(b) + 2);
strcpy(full_path, a);
if (b[0] != '/' && a[strlen(a) - 1] != '/')
return full_path;
}
+
+static char *local_name(void *ctx)
+{
+ char *tmp, *ret;
+
+ tmp = tempnam(NULL, "pb-");
+
+ if (!tmp)
+ return NULL;
+
+ ret = talloc_strdup(ctx, tmp);
+ free(tmp);
+
+ return ret;
+}
+
+/**
+ * pb_load_nfs - Mounts the NFS export and returns the local file path.
+ *
+ * Returns the local file path in a talloc'ed character string on success,
+ * or NULL on error.
+ */
+static char *load_nfs(void *ctx, struct pb_url *url)
+{
+ int result;
+ const char *argv[8];
+ const char **p;
+ char *local;
+ char *opts;
+
+ local = local_name(ctx);
+
+ if (!local)
+ return NULL;
+
+ result = pb_mkdir_recursive(local);
+
+ if (result)
+ goto fail;
+
+ opts = talloc_strdup(NULL, "ro,nolock,nodiratime");
+
+ if (url->port)
+ opts = talloc_asprintf_append(opts, ",port=%s", url->port);
+
+ p = argv;
+ *p++ = pb_system_apps.mount; /* 1 */
+ *p++ = "-t"; /* 2 */
+ *p++ = "nfs"; /* 3 */
+ *p++ = opts; /* 4 */
+ *p++ = url->host; /* 5 */
+ *p++ = url->dir; /* 6 */
+ *p++ = local; /* 7 */
+ *p++ = NULL; /* 8 */
+
+ result = pb_run_cmd(argv, 1, 0);
+
+ talloc_free(opts);
+
+ if (result)
+ goto fail;
+
+ local = talloc_asprintf_append(local, "/%s", url->path);
+ pb_log("%s: local '%s'\n", __func__, local);
+
+ return local;
+
+fail:
+ pb_rmdir_recursive("/", local);
+ talloc_free(local);
+ return NULL;
+}
+
+/**
+ * pb_load_sftp - Loads a remote file via sftp and returns the local file path.
+ *
+ * Returns the local file path in a talloc'ed character string on success,
+ * or NULL on error.
+ */
+static char *load_sftp(void *ctx, struct pb_url *url)
+{
+ int result;
+ const char *argv[4];
+ const char **p;
+ char *local;
+
+ local = local_name(ctx);
+
+ if (!local)
+ return NULL;
+
+ p = argv;
+ *p++ = pb_system_apps.sftp; /* 1 */
+ *p++ = talloc_asprintf(local, "%s:%s", url->host, url->path); /* 2 */
+ *p++ = local; /* 3 */
+ *p++ = NULL; /* 4 */
+
+ result = pb_run_cmd(argv, 1, 0);
+
+ if (result)
+ goto fail;
+
+ return local;
+
+fail:
+ talloc_free(local);
+ return NULL;
+}
+
+/**
+ * pb_load_tftp - Loads a remote file via tftp and returns the local file path.
+ *
+ * Returns the local file path in a talloc'ed character string on success,
+ * or NULL on error.
+ */
+
+static char *load_tftp(void *ctx, struct pb_url *url)
+{
+ int result;
+ const char *argv[10];
+ const char **p;
+ char *local;
+
+ local = local_name(ctx);
+
+ if (!local)
+ return NULL;
+
+ /* first try busybox tftp args */
+
+ p = argv;
+ *p++ = pb_system_apps.tftp; /* 1 */
+ *p++ = "-g"; /* 2 */
+ *p++ = "-l"; /* 3 */
+ *p++ = local; /* 4 */
+ *p++ = "-r"; /* 5 */
+ *p++ = url->path; /* 6 */
+ *p++ = url->host; /* 7 */
+ if (url->port)
+ *p++ = url->port; /* 8 */
+ *p++ = NULL; /* 9 */
+
+ result = pb_run_cmd(argv, 1, 0);
+
+ if (!result)
+ return local;
+
+ /* next try tftp-hpa args */
+
+ p = argv;
+ *p++ = pb_system_apps.tftp; /* 1 */
+ *p++ = "-m"; /* 2 */
+ *p++ = "binary"; /* 3 */
+ *p++ = url->host; /* 4 */
+ if (url->port)
+ *p++ = url->port; /* 5 */
+ *p++ = "-c"; /* 6 */
+ *p++ = "get"; /* 7 */
+ *p++ = url->path; /* 8 */
+ *p++ = local; /* 9 */
+ *p++ = NULL; /* 10 */
+
+ result = pb_run_cmd(argv, 1, 0);
+
+ if (!result)
+ return local;
+
+ talloc_free(local);
+ return NULL;
+}
+
+enum wget_flags {
+ wget_empty = 0,
+ wget_no_check_certificate = 1,
+};
+
+/**
+ * pb_load_wget - Loads a remote file via wget and returns the local file path.
+ *
+ * Returns the local file path in a talloc'ed character string on success,
+ * or NULL on error.
+ */
+
+static char *load_wget(void *ctx, struct pb_url *url, enum wget_flags flags)
+{
+ int result;
+ const char *argv[7];
+ const char **p;
+ char *local;
+
+ local = local_name(ctx);
+
+ if (!local)
+ return NULL;
+
+ p = argv;
+ *p++ = pb_system_apps.wget; /* 1 */
+#if !defined(DEBUG)
+ *p++ = "--quiet"; /* 2 */
+#endif
+ *p++ = "-O"; /* 3 */
+ *p++ = local; /* 4 */
+ *p++ = url->full; /* 5 */
+ if (flags & wget_no_check_certificate)
+ *p++ = "--no-check-certificate"; /* 6 */
+ *p++ = NULL; /* 7 */
+
+ result = pb_run_cmd(argv, 1, 0);
+
+ if (result)
+ goto fail;
+
+ return local;
+
+fail:
+ talloc_free(local);
+ return NULL;
+}
+
+/**
+ * pb_load_file - Loads a (possibly) remote file and returns the local file
+ * path.
+ * @ctx: The talloc context to associate with the returned string.
+ * @remote: The remote file URL.
+ * @tempfile: An optional variable pointer to be set when a temporary local
+ * file is created.
+ *
+ * Returns the local file path in a talloc'ed character string on success,
+ * or NULL on error.
+ */
+
+char *load_file(void *ctx, const char *remote, unsigned int *tempfile)
+{
+ struct pb_url *url = pb_url_parse(ctx, remote);
+ char *local;
+ int tmp = 0;
+
+ if (!url)
+ return NULL;
+
+ switch (url->scheme) {
+ case pb_url_ftp:
+ case pb_url_http:
+ local = load_wget(ctx, url, 0);
+ tmp = !!local;
+ break;
+ case pb_url_https:
+ local = load_wget(ctx, url, wget_no_check_certificate);
+ tmp = !!local;
+ break;
+ case pb_url_nfs:
+ local = load_nfs(ctx, url);
+ tmp = !!local;
+ break;
+ case pb_url_sftp:
+ local = load_sftp(ctx, url);
+ tmp = !!local;
+ break;
+ case pb_url_tftp:
+ local = load_tftp(ctx, url);
+ tmp = !!local;
+ break;
+ default:
+ local = talloc_strdup(ctx, url->full);
+ tmp = 0;
+ break;
+ }
+
+ if (tempfile)
+ *tempfile = tmp;
+
+ talloc_free(url);
+ return local;
+}
projects / petitboot / blobdiff