- kvm-cmd.h: Adds a new structure cmd_struct to create a table of commands and callback function. The structure was copied from tools/perf
- kvm-cmd.c: implements two main functions for command processing. kvm_get_command(): searches table for specific command. handle_command(): invokes the callback function for a given command. - kvm-help.[ch] Implements the kvm help command. The function list_common_cmds_help() is a copy of similar function in tools/perf. Signed-off-by: Prasad Joshi <[email protected]> --- tools/kvm/include/kvm/kvm-cmd.h | 12 ++++++++ tools/kvm/include/kvm/kvm-help.h | 6 ++++ tools/kvm/kvm-cmd.c | 55 ++++++++++++++++++++++++++++++++++++++ tools/kvm/kvm-help.c | 43 +++++++++++++++++++++++++++++ 4 files changed, 116 insertions(+), 0 deletions(-) create mode 100644 tools/kvm/include/kvm/kvm-cmd.h create mode 100644 tools/kvm/include/kvm/kvm-help.h create mode 100644 tools/kvm/kvm-cmd.c create mode 100644 tools/kvm/kvm-help.c diff --git a/tools/kvm/include/kvm/kvm-cmd.h b/tools/kvm/include/kvm/kvm-cmd.h new file mode 100644 index 0000000..8d5fca5 --- /dev/null +++ b/tools/kvm/include/kvm/kvm-cmd.h @@ -0,0 +1,12 @@ +#ifndef __KVM_CMD_H__ +#define __KVM_CMD_H__ + +struct cmd_struct { + const char *cmd; + int (*fn)(int, const char **, const char *); + int option; +}; + +int handle_command(struct cmd_struct *command, int argc, const char **argv); + +#endif diff --git a/tools/kvm/include/kvm/kvm-help.h b/tools/kvm/include/kvm/kvm-help.h new file mode 100644 index 0000000..2946743 --- /dev/null +++ b/tools/kvm/include/kvm/kvm-help.h @@ -0,0 +1,6 @@ +#ifndef __KVM_HELP_H__ +#define __KVM_HELP_H__ + +int kvm_cmd_help(int argc, const char **argv, const char *prefix); + +#endif diff --git a/tools/kvm/kvm-cmd.c b/tools/kvm/kvm-cmd.c new file mode 100644 index 0000000..3c15006 --- /dev/null +++ b/tools/kvm/kvm-cmd.c @@ -0,0 +1,55 @@ +#include <stdio.h> +#include <string.h> +#include <errno.h> + +#include <assert.h> + +/* user defined header files */ +#include <kvm/kvm-cmd.h> + +/* kvm_get_command: Searches the command in an array of the commands and + returns a pointer to cmd_struct if a match is found. + + Input parameters: + command: Array of possible commands. The last entry in the array must be + NULL. + cmd: A string command to search in the array + + Return Value: + NULL: If the cmd is not matched with any of the command in the command array + p: Pointer to cmd_struct of the matching command + */ +static struct cmd_struct *kvm_get_command(struct cmd_struct *command, + const char *cmd) +{ + struct cmd_struct *p = command; + + while (p->cmd) { + if (!strcmp(p->cmd, cmd)) + return p; + p++; + } + return NULL; +} + +int handle_command(struct cmd_struct *command, int argc, const char **argv) +{ + struct cmd_struct *p; + const char *prefix = NULL; + + if (!argv || !*argv) { + p = kvm_get_command(command, "help"); + assert(p); + return p->fn(argc, argv, prefix); + } + + p = kvm_get_command(command, argv[0]); + if (!p) { + p = kvm_get_command(command, "help"); + assert(p); + p->fn(0, NULL, prefix); + return EINVAL; + } + + return p->fn(argc - 1, &argv[1], prefix); +} diff --git a/tools/kvm/kvm-help.c b/tools/kvm/kvm-help.c new file mode 100644 index 0000000..5506807 --- /dev/null +++ b/tools/kvm/kvm-help.c @@ -0,0 +1,43 @@ +#include <stdio.h> +#include <string.h> + +/* user defined headers */ +#include <common-cmds.h> + +#include <kvm/util.h> +#include <kvm/kvm-help.h> + + +const char kvm_usage_string[] = + "kvm [--version] [--help] COMMAND [ARGS]"; + +const char kvm_more_info_string[] = + "See 'kvm help COMMAND' for more information on a specific command."; + + +static void list_common_cmds_help(void) +{ + unsigned int i, longest = 0; + + for (i = 0; i < ARRAY_SIZE(common_cmds); i++) { + if (longest < strlen(common_cmds[i].name)) + longest = strlen(common_cmds[i].name); + } + + puts(" The most commonly used kvm commands are:"); + for (i = 0; i < ARRAY_SIZE(common_cmds); i++) { + printf(" %-*s ", longest, common_cmds[i].name); + puts(common_cmds[i].help); + } +} + +int kvm_cmd_help(int argc, const char **argv, const char *prefix) +{ + if (!argv || !*argv) { + printf("\n usage: %s\n\n", kvm_usage_string); + list_common_cmds_help(); + printf("\n %s\n\n", kvm_more_info_string); + return 0; + } + return 0; +} -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
