Move boot to discover server
[petitboot] / discover / paths.c
index c4036919bdf7e9ff05f4afa9389c96137d5bc8c3..ef8a45f924c8fa658fd4c39330f40eaf485761b4 100644 (file)
@@ -5,6 +5,9 @@
 #include <stdlib.h>
 
 #include <talloc/talloc.h>
+#include <system/system.h>
+#include <url/url.h>
+#include <log/log.h>
 
 #include "paths.h"
 
@@ -153,3 +156,277 @@ char *join_paths(void *alloc_ctx, const char *a, const char *b)
        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;
+}