diff options
Diffstat (limited to 'usr.sbin/init')
| -rw-r--r-- | usr.sbin/init/mshell.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/usr.sbin/init/mshell.c b/usr.sbin/init/mshell.c index dde07a9..a361b27 100644 --- a/usr.sbin/init/mshell.c +++ b/usr.sbin/init/mshell.c @@ -39,6 +39,7 @@ #include "mshell.h" #define INPUT_SIZE 32 +#define MAX_FILE_SIZE 1024 #define TTY_DEV "/dev/tty1" #define PROMPT "mshell> " @@ -56,11 +57,38 @@ help(void) "\treboot - reboot the system\n" "\ttty - show the current TTY\n" "\tpagesize - get the current page size\n" + "\tkversion - get the kernel version\n" + "\tmemstat - get info about memory\n" "\texit - exit the shell\n" ); } static void +print_file(const char *path) +{ + char buf[MAX_FILE_SIZE]; + int fd = open(path, O_RDONLY); + int len; + + if (fd < 0) { + printf("Failed to open %s\n", path); + return; + } + + len = read(fd, buf, sizeof(buf)); + if (len > MAX_FILE_SIZE) { + len = MAX_FILE_SIZE - 1; + } + + if (len > 0) { + buf[len] = '\0'; + printf("%s\n", buf); + } + + close(fd); +} + +static void parse_input(struct mshell_state *state) { char cmd[INPUT_SIZE]; @@ -91,6 +119,10 @@ parse_input(struct mshell_state *state) help(); } else if (strcmp(cmd, "exit") == 0) { state->running = 0; + } else if (strcmp(cmd, "kversion") == 0) { + print_file("/proc/version"); + } else if (strcmp(cmd, "memstat") == 0) { + print_file("/proc/memstat"); } else { printf("Unknown command '%s'\n", cmd); printf("Use 'help' for help\n"); |