[PATCH] libxenlight: add console command

[Tomasz Wroblewski <tomasz.wroblewski@citrix.com>]

Hello all,

This patch adds "xl console" command similar to "xm console".
 
Signed-off-by: Tomasz Wroblewski <tomasz.wroblewski@citrix.com>
---

diff -r d7d77bace286 tools/libxl/libxl.c
--- a/tools/libxl/libxl.c	Fri Nov 27 10:13:42 2009 +0000
+++ b/tools/libxl/libxl.c	Fri Nov 27 10:18:18 2009 +0000
@@ -468,6 +468,24 @@
     if (rc < 0) {
         XL_LOG_ERRNOVAL(ctx, XL_LOG_ERROR, rc, "xc_domain_destroy
failed for %d", domid);
         return -1;
+    }
+    return 0;
+}
+
+int libxl_console_attach(struct libxl_ctx *ctx, uint32_t domid, int
cons_num)
+{
+    struct stat st;
+    const char *XENCONSOLE = "/usr/lib/xen/bin/xenconsole";
+    char *cmd = NULL;
+
+    if (stat(XENCONSOLE, &st) != 0) {
+        XL_LOG(ctx, XL_LOG_ERROR, "could not access %s", XENCONSOLE);
+        return ERROR_FAIL;
+    }
+
+    cmd = libxl_sprintf(ctx, "%s %d --num %d", XENCONSOLE, domid,
cons_num);
+    if (system(cmd) != 0) {
+        return ERROR_FAIL;
     }
     return 0;
 }
diff -r d7d77bace286 tools/libxl/libxl.h
--- a/tools/libxl/libxl.h	Fri Nov 27 10:13:42 2009 +0000
+++ b/tools/libxl/libxl.h	Fri Nov 27 10:18:18 2009 +0000
@@ -266,6 +266,8 @@
 int libxl_domain_pause(struct libxl_ctx *ctx, uint32_t domid);
 int libxl_domain_unpause(struct libxl_ctx *ctx, uint32_t domid);
 
+int libxl_console_attach(struct libxl_ctx *ctx, uint32_t domid, int
cons_num);
+
 struct libxl_dominfo * libxl_domain_list(struct libxl_ctx *ctx, int
*nb_domain);
 xc_dominfo_t * libxl_domain_infolist(struct libxl_ctx *ctx, int
*nb_domain);
 
diff -r d7d77bace286 tools/libxl/xl.c
--- a/tools/libxl/xl.c	Fri Nov 27 10:13:42 2009 +0000
+++ b/tools/libxl/xl.c	Fri Nov 27 10:18:18 2009 +0000
@@ -715,6 +715,7 @@
         printf(" pci-list                      list pass-through pci
devices for a domain\n\n");
         printf(" pause                         pause execution of a
domain\n\n");
         printf(" unpause                       unpause a paused domain
\n\n");
+        printf(" console                       attach to domain's
console\n\n");
     } else if(!strcmp(command, "create")) {
         printf("Usage: xl create <ConfigFile> [options] [vars]\n\n");
         printf("Create a domain based on <ConfigFile>.\n\n");
@@ -742,7 +743,56 @@
     } else if(!strcmp(command, "destroy")) {
         printf("Usage: xl destroy <Domain>\n\n");
         printf("Terminate a domain immediately.\n\n");
+    } else if (!strcmp(command, "console")) {
+        printf("Usage: xl console <Domain>\n\n");
+        printf("Attach to domain's console.\n\n");
     }
+}
+
+void console(char *p, int cons_num)
+{
+    struct libxl_ctx ctx;
+    uint32_t domid;
+
+    libxl_ctx_init(&ctx);
+    libxl_ctx_set_log(&ctx, log_callback, NULL);
+
+    if (libxl_param_to_domid(&ctx, p, &domid) < 0) {
+        fprintf(stderr, "%s is an invalid domain identifier\n", p);
+        exit(2);
+    }
+    libxl_console_attach(&ctx, domid, cons_num);
+}
+
+int main_console(int argc, char **argv)
+{
+    int opt = 0, cons_num = 0;
+    char *p = NULL;
+
+    while ((opt = getopt(argc, argv, "hn:")) != -1) {
+        switch (opt) {
+        case 'h':
+            help("console");
+            exit(0);
+        case 'n':
+            if (optarg) {
+                cons_num = strtol(optarg, NULL, 10);
+            }
+            break;
+        default:
+            fprintf(stderr, "option not supported\n");
+            break;
+        }
+    }
+    if (optind >= argc) {
+        help("console");
+        exit(2);
+    }
+
+    p = argv[optind];
+
+    console(p, cons_num);
+    exit(0);
 }
 
 void pcilist(char *dom)
@@ -1121,6 +1171,8 @@
         main_pause(argc - 1, argv + 1);
     } else if (!strcmp(argv[1], "unpause")) {
         main_unpause(argc - 1, argv + 1);
+    } else if (!strcmp(argv[1], "console")) {
+        main_console(argc - 1, argv + 1);
     } else if (!strcmp(argv[1], "help")) {
         if (argc > 2)
             help(argv[2]);