#include <config.h>
+#define _GNU_SOURCE // for strchrnul
+
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <getopt.h>
#include <inttypes.h>
+#include <assert.h>
+
+#ifdef HAVE_LIBREADLINE
+#include <readline/readline.h>
+#include <readline/history.h>
+#endif
#include <guestfs.h>
static void cmdline (char *argv[], int optind, int argc);
static int issue_command (const char *cmd, char *argv[]);
static int parse_size (const char *str, off_t *size_rtn);
+static void initialize_readline (void);
+static void cleanup_readline (void);
+static void add_history_line (const char *);
/* Currently open libguestfs handle. */
guestfs_h *g;
int verbose = 0;
int
-launch (void)
+launch (guestfs_h *_g)
{
+ assert (_g == g);
+
if (!g_launched) {
if (guestfs_launch (g) == -1)
return -1;
char *p;
int c;
+ initialize_readline ();
+
/* guestfs_create is meant to be a lightweight operation, so
* it's OK to do it early here.
*/
mp->mountpoint = "/";
mp->device = optarg;
mp->next = mps;
- mps = mp->next;
+ mps = mp;
break;
case 'n':
/* If we've got mountpoints, we must launch the guest and mount them. */
if (mps != NULL) {
- if (launch () == -1) exit (1);
+ if (launch (g) == -1) exit (1);
mount_mps (mps);
}
else
cmdline (argv, optind, argc);
+ cleanup_readline ();
+
exit (0);
}
script (0);
}
+#define FISH "><fs> "
+
+static char *line_read = NULL;
+
+static char *
+rl_gets (int prompt)
+{
+#ifdef HAVE_LIBREADLINE
+
+ if (line_read) {
+ free (line_read);
+ line_read = NULL;
+ }
+
+ line_read = readline (prompt ? FISH : "");
+
+ if (prompt && line_read && *line_read)
+ add_history_line (line_read);
+
+#else /* !HAVE_LIBREADLINE */
+
+ static char buf[8192];
+ int len;
+
+ if (prompt) printf (FISH);
+ line_read = fgets (buf, sizeof buf, stdin);
+
+ if (line_read) {
+ len = strlen (line_read);
+ if (len > 0 && buf[len-1] == '\n') buf[len-1] = '\0';
+ }
+
+#endif /* !HAVE_LIBREADLINE */
+
+ return line_read;
+}
+
static void
script (int prompt)
{
- char buf[8192];
+ char *buf;
char *cmd;
+ char *p, *pend;
char *argv[64];
- int len, i;
+ int i, len;
if (prompt)
printf ("\n"
"\n");
while (!quit) {
- if (prompt) printf ("><fs> ");
- if (fgets (buf, sizeof buf, stdin) == NULL) {
+ buf = rl_gets (prompt);
+ if (!buf) {
quit = 1;
break;
}
- len = strlen (buf);
- if (len > 0 && buf[len-1] == '\n') buf[len-1] = '\0';
+ /* Skip any initial whitespace before the command. */
+ while (*buf && isspace (*buf))
+ buf++;
- /* Split the buffer up at whitespace. */
- cmd = strtok (buf, " \t");
- if (cmd == NULL)
- continue;
+ /* Get the command (cannot be quoted). */
+ len = strcspn (buf, " \t");
+ if (len == 0) continue;
+
+ cmd = buf;
i = 0;
- while (i < sizeof argv / sizeof argv[0] &&
- (argv[i] = strtok (NULL, " \t")) != NULL)
- i++;
+ if (buf[len] == '\0') {
+ argv[0] = NULL;
+ goto got_command;
+ }
+
+ buf[len] = '\0';
+ p = &buf[len+1];
+ p += strspn (p, " \t");
+
+ /* Get the parameters. */
+ while (*p && i < sizeof argv / sizeof argv[0]) {
+ /* Parameters which start with quotes or square brackets
+ * are treated specially. Bare parameters are delimited
+ * by whitespace.
+ */
+ if (*p == '"') {
+ p++;
+ len = strcspn (p, "\"");
+ if (p[len] == '\0') {
+ fprintf (stderr, "guestfish: unterminated double quote\n");
+ if (!prompt) exit (1);
+ goto next_command;
+ }
+ if (p[len+1] && (p[len+1] != ' ' && p[len+1] != '\t')) {
+ fprintf (stderr, "guestfish: command arguments not separated by whitespace\n");
+ if (!prompt) exit (1);
+ goto next_command;
+ }
+ p[len] = '\0';
+ pend = &p[len+2];
+ } else if (*p == '\'') {
+ p++;
+ len = strcspn (p, "'");
+ if (p[len] == '\0') {
+ fprintf (stderr, "guestfish: unterminated single quote\n");
+ if (!prompt) exit (1);
+ goto next_command;
+ }
+ if (p[len+1] && (p[len+1] != ' ' && p[len+1] != '\t')) {
+ fprintf (stderr, "guestfish: command arguments not separated by whitespace\n");
+ if (!prompt) exit (1);
+ goto next_command;
+ }
+ p[len] = '\0';
+ pend = &p[len+2];
+ /*
+ } else if (*p == '[') {
+ int c = 1;
+ p++;
+ pend = p;
+ while (*pend && c != 0) {
+ if (*pend == '[') c++;
+ else if (*pend == ']') c--;
+ pend++;
+ }
+ if (c != 0) {
+ fprintf (stderr, "guestfish: unterminated \"[...]\" sequence\n");
+ if (!prompt) exit (1);
+ goto next_command;
+ }
+ if (*pend && (*pend != ' ' && *pend != '\t')) {
+ fprintf (stderr, "guestfish: command arguments not separated by whitespace\n");
+ if (!prompt) exit (1);
+ goto next_command;
+ }
+ *(pend-1) = '\0';
+ */
+ } else if (*p != ' ' && *p != '\t') {
+ len = strcspn (p, " \t");
+ if (p[len]) {
+ p[len] = '\0';
+ pend = &p[len+1];
+ } else
+ pend = &p[len];
+ } else {
+ fprintf (stderr, "guestfish: internal error parsing string at '%s'\n",
+ p);
+ abort ();
+ }
+
+ argv[i++] = p;
+ p = pend;
+
+ if (*p)
+ p += strspn (p, " \t");
+ }
+
if (i == sizeof argv / sizeof argv[0]) {
- fprintf (stderr, "guestfish: too many arguments in command\n");
- exit (1);
+ fprintf (stderr, "guestfish: too many arguments\n");
+ if (!prompt) exit (1);
+ goto next_command;
}
+ argv[i] = NULL;
+
+ got_command:
if (issue_command (cmd, argv) == -1) {
if (!prompt) exit (1);
}
+
+ next_command:;
}
if (prompt) printf ("\n");
}
quit = 1;
return 0;
}
- else if (strcasecmp (cmd, "add") == 0 ||
- strcasecmp (cmd, "drive") == 0 ||
- strcasecmp (cmd, "add-drive") == 0 ||
- strcasecmp (cmd, "add_drive") == 0) {
- if (argc != 1) {
- fprintf (stderr, "use 'add image' to add a guest image\n");
- return -1;
- }
- else
- return guestfs_add_drive (g, argv[0]);
- }
- else if (strcasecmp (cmd, "cdrom") == 0 ||
- strcasecmp (cmd, "add-cdrom") == 0 ||
- strcasecmp (cmd, "add_cdrom") == 0) {
- if (argc != 1) {
- fprintf (stderr, "use 'cdrom image' to add a CD-ROM image\n");
- return -1;
- }
- else
- return guestfs_add_cdrom (g, argv[0]);
- }
else if (strcasecmp (cmd, "alloc") == 0 ||
strcasecmp (cmd, "allocate") == 0) {
if (argc != 2) {
return 0;
}
}
- else if (strcasecmp (cmd, "launch") == 0 ||
- strcasecmp (cmd, "run") == 0) {
- if (argc != 0) {
- fprintf (stderr, "'launch' command takes no parameters\n");
- return -1;
- }
- else
- return launch ();
- }
else
return run_action (cmd, argc, argv);
}
printf ("%-20s %s\n",
"quit", "quit guestfish");
- /* then the non-actions, in alphabetical order */
- printf ("%-20s %s\n",
- "add", "add a guest image to be examined or modified");
printf ("%-20s %s\n",
"alloc", "allocate an image");
- printf ("%-20s %s\n",
- "cdrom", "add a CD-ROM image to be examined");
- printf ("%-20s %s\n",
- "launch", "launch the subprocess");
/* actions are printed after this (see list_commands) */
}
{
/* help for actions is auto-generated, see display_command */
- if (strcasecmp (cmd, "add") == 0)
- printf ("add - add a guest image to be examined or modified\n"
- " add <image>\n");
- else if (strcasecmp (cmd, "alloc") == 0)
+ if (strcasecmp (cmd, "alloc") == 0)
printf ("alloc - allocate an image\n"
" alloc <filename> <size>\n"
"\n"
" <nn>M or <nn>MB number of megabytes\n"
" <nn>G or <nn>GB number of gigabytes\n"
" <nn>sects number of 512 byte sectors\n");
- else if (strcasecmp (cmd, "cdrom") == 0)
- printf ("cdrom - add a CD-ROM image to be examined\n"
- " cdrom <iso-file>\n");
else if (strcasecmp (cmd, "help") == 0)
printf ("help - display a list of commands or help on a command\n"
" help cmd\n"
else if (strcasecmp (cmd, "quit") == 0)
printf ("quit - quit guestfish\n"
" quit\n");
- else if (strcasecmp (cmd, "launch") == 0)
- printf ("launch - launch the subprocess\n"
- " launch\n");
else
fprintf (stderr, "%s: command not known, use -h to list all commands\n",
cmd);
return -1;
}
- printf ("size = %lu\n", size);
-
/* XXX 32 bit file offsets, if anyone uses them? GCC should give
* a warning here anyhow.
*/
return 0;
}
+
+void
+free_strings (char **argv)
+{
+ int argc;
+
+ for (argc = 0; argv[argc] != NULL; ++argc)
+ free (argv[argc]);
+ free (argv);
+}
+
+void
+print_strings (char * const * const argv)
+{
+ int argc;
+
+ for (argc = 0; argv[argc] != NULL; ++argc)
+ printf ("%s\n", argv[argc]);
+}
+
+int
+is_true (const char *str)
+{
+ return
+ strcasecmp (str, "0") != 0 &&
+ strcasecmp (str, "f") != 0 &&
+ strcasecmp (str, "false") != 0 &&
+ strcasecmp (str, "n") != 0 &&
+ strcasecmp (str, "no") != 0;
+}
+
+/* XXX We could improve list parsing. */
+char **
+parse_string_list (const char *str)
+{
+ char **argv;
+ const char *p, *pend;
+ int argc, i;
+
+ argc = 1;
+ for (i = 0; str[i]; ++i)
+ if (str[i] == ' ') argc++;
+
+ argv = malloc (sizeof (char *) * (argc+1));
+ if (argv == NULL) { perror ("malloc"); exit (1); }
+
+ p = str;
+ i = 0;
+ while (*p) {
+ pend = strchrnul (p, ' ');
+ argv[i] = strndup (p, pend-p);
+ i++;
+ p = *pend == ' ' ? pend+1 : pend;
+ }
+ argv[i] = NULL;
+
+ return argv;
+}
+
+#ifdef HAVE_LIBREADLINE
+static char histfile[1024];
+static int nr_history_lines = 0;
+#endif
+
+static void
+initialize_readline (void)
+{
+#ifdef HAVE_LIBREADLINE
+ const char *home;
+
+ home = getenv ("HOME");
+ if (home) {
+ snprintf (histfile, sizeof histfile, "%s/.guestfish", home);
+ using_history ();
+ (void) read_history (histfile);
+ }
+
+ rl_readline_name = "guestfish";
+ rl_attempted_completion_function = do_completion;
+#endif
+}
+
+static void
+cleanup_readline (void)
+{
+#ifdef HAVE_LIBREADLINE
+ int fd;
+
+ if (histfile[0] != '\0') {
+ fd = open (histfile, O_WRONLY|O_CREAT, 0644);
+ if (fd == -1) {
+ perror (histfile);
+ return;
+ }
+ close (fd);
+
+ (void) append_history (nr_history_lines, histfile);
+ }
+#endif
+}
+
+static void
+add_history_line (const char *line)
+{
+#ifdef HAVE_LIBREADLINE
+ add_history (line);
+ nr_history_lines++;
+#endif
+}
git.annexia.org / libguestfs.git / blobdiff