X-Git-Url: http://git.annexia.org/?p=libguestfs.git;a=blobdiff_plain;f=fish%2Ffish.c;h=a5fc337d2f5ef59cba5e2373c3b7386eacd6b4b1;hp=18b8d451778a7e2f020ea008c55c95358dce2b36;hb=0b2748bb2729bea0d6f6b794e7f6e0cfb8d36bcc;hpb=b4d2a01828e5de85e5eee3631f7fe3925a0312ca diff --git a/fish/fish.c b/fish/fish.c index 18b8d45..a5fc337 100644 --- a/fish/fish.c +++ b/fish/fish.c @@ -26,9 +26,13 @@ #include #include #include -#include #include +#ifdef HAVE_LIBREADLINE +#include +#include +#endif + #include #include "fish.h" @@ -45,12 +49,15 @@ static void shell_script (void); static void script (int prompt); 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 g_launched = 0; +int read_only = 0; int quit = 0; int verbose = 0; @@ -91,22 +98,25 @@ usage (void) " -a|--add image Add image\n" " -m|--mount dev[:mnt] Mount dev on mnt (if omitted, /)\n" " -n|--no-sync Don't autosync\n" - /*" --ro|-r All mounts are read-only\n"*/ + " -r|--ro Mount read-only\n" " -v|--verbose Verbose messages\n" + " -V|--version Display version and exit\n" "For more information, see the manpage guestfish(1).\n"); } int main (int argc, char *argv[]) { - static const char *options = "a:h::m:v?"; + static const char *options = "a:h::m:nrv?V"; static struct option long_options[] = { { "add", 1, 0, 'a' }, { "cmd-help", 2, 0, 'h' }, { "help", 0, 0, '?' }, { "mount", 1, 0, 'm' }, { "no-sync", 0, 0, 'n' }, + { "ro", 0, 0, 'r' }, { "verbose", 0, 0, 'v' }, + { "version", 0, 0, 'V' }, { 0, 0, 0, 0 } }; struct mp *mps = NULL; @@ -114,6 +124,8 @@ main (int argc, char *argv[]) char *p; int c; + initialize_readline (); + /* guestfs_create is meant to be a lightweight operation, so * it's OK to do it early here. */ @@ -128,8 +140,12 @@ main (int argc, char *argv[]) /* If developing, add . to the path. Note that libtools interferes * with this because uninstalled guestfish is a shell script that runs * the real program with an absolute path. Detect that too. + * + * BUT if LIBGUESTFS_PATH environment variable is already set by + * the user, then don't override it. */ - if (argv[0] && + if (getenv ("LIBGUESTFS_PATH") == NULL && + argv[0] && (argv[0][0] != '/' || strstr (argv[0], "/.libs/lt-") != NULL)) guestfs_set_path (g, ".:" GUESTFS_DEFAULT_PATH); @@ -177,11 +193,19 @@ main (int argc, char *argv[]) guestfs_set_autosync (g, 0); break; + case 'r': + read_only = 1; + break; + case 'v': verbose++; guestfs_set_verbose (g, verbose); break; + case 'V': + printf ("guestfish %s\n", PACKAGE_VERSION); + exit (0); + case '?': usage (); exit (0); @@ -208,6 +232,8 @@ main (int argc, char *argv[]) else cmdline (argv, optind, argc); + cleanup_readline (); + exit (0); } @@ -235,9 +261,15 @@ pod2text (const char *heading, const char *str) static void mount_mps (struct mp *mp) { + int r; + if (mp) { mount_mps (mp->next); - if (guestfs_mount (g, mp->device, mp->mountpoint) == -1) + if (!read_only) + r = guestfs_mount (g, mp->device, mp->mountpoint); + else + r = guestfs_mount_ro (g, mp->device, mp->mountpoint); + if (r == -1) exit (1); } } @@ -254,13 +286,53 @@ shell_script (void) script (0); } +#define FISH "> " + +static char *line_read = NULL; + +static char * +rl_gets (int prompt) +{ +#ifdef HAVE_LIBREADLINE + + if (prompt) { + if (line_read) { + free (line_read); + line_read = NULL; + } + + line_read = readline (prompt ? FISH : ""); + + if (line_read && *line_read) + add_history_line (line_read); + + return line_read; + } + +#endif /* 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'; + } + + 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" @@ -272,32 +344,124 @@ script (int prompt) "\n"); while (!quit) { - if (prompt) printf ("> "); - 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+1] ? &p[len+2] : &p[len+1]; + } 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+1] ? &p[len+2] : &p[len+1]; + /* + } 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"); } @@ -352,50 +516,12 @@ issue_command (const char *cmd, char *argv[]) return 0; } else if (strcasecmp (cmd, "alloc") == 0 || - strcasecmp (cmd, "allocate") == 0) { - if (argc != 2) { - fprintf (stderr, "use 'alloc file size' to create an image\n"); - return -1; - } - else { - off_t size; - int fd; - - if (parse_size (argv[1], &size) == -1) - return -1; - - if (g_launched) { - fprintf (stderr, "can't allocate or add disks after launching\n"); - return -1; - } - - fd = open (argv[0], O_WRONLY|O_CREAT|O_NOCTTY|O_NONBLOCK|O_TRUNC, 0666); - if (fd == -1) { - perror (argv[0]); - return -1; - } - - if (posix_fallocate (fd, 0, size) == -1) { - perror ("fallocate"); - close (fd); - unlink (argv[0]); - return -1; - } - - if (close (fd) == -1) { - perror (argv[0]); - unlink (argv[0]); - return -1; - } - - if (guestfs_add_drive (g, argv[0]) == -1) { - unlink (argv[0]); - return -1; - } - - return 0; - } - } + strcasecmp (cmd, "allocate") == 0) + return do_alloc (cmd, argc, argv); + else if (strcasecmp (cmd, "edit") == 0 || + strcasecmp (cmd, "vi") == 0 || + strcasecmp (cmd, "emacs") == 0) + return do_edit (cmd, argc, argv); else return run_action (cmd, argc, argv); } @@ -411,6 +537,8 @@ list_builtin_commands (void) printf ("%-20s %s\n", "alloc", "allocate an image"); + printf ("%-20s %s\n", + "edit", "edit a file in the image"); /* actions are printed after this (see list_commands) */ } @@ -420,7 +548,8 @@ display_builtin_command (const char *cmd) { /* help for actions is auto-generated, see display_command */ - if (strcasecmp (cmd, "alloc") == 0) + if (strcasecmp (cmd, "alloc") == 0 || + strcasecmp (cmd, "allocate") == 0) printf ("alloc - allocate an image\n" " alloc \n" "\n" @@ -436,11 +565,29 @@ display_builtin_command (const char *cmd) " M or MB number of megabytes\n" " G or GB number of gigabytes\n" " sects number of 512 byte sectors\n"); + else if (strcasecmp (cmd, "edit") == 0 || + strcasecmp (cmd, "vi") == 0 || + strcasecmp (cmd, "emacs") == 0) + printf ("edit - edit a file in the image\n" + " edit \n" + "\n" + " This is used to edit a file.\n" + "\n" + " It is the equivalent of (and is implemented by)\n" + " running \"cat\", editing locally, and then \"write-file\".\n" + "\n" + " Normally it uses $EDITOR, but if you use the aliases\n" + " \"vi\" or \"emacs\" you will get those editors.\n" + "\n" + " NOTE: This will not work reliably for large files\n" + " (> 2 MB) or binary files containing \\0 bytes.\n"); else if (strcasecmp (cmd, "help") == 0) printf ("help - display a list of commands or help on a command\n" " help cmd\n" " help\n"); - else if (strcasecmp (cmd, "quit") == 0) + else if (strcasecmp (cmd, "quit") == 0 || + strcasecmp (cmd, "exit") == 0 || + strcasecmp (cmd, "q") == 0) printf ("quit - quit guestfish\n" " quit\n"); else @@ -448,44 +595,6 @@ display_builtin_command (const char *cmd) cmd); } -/* Parse size parameter of alloc command. */ -static int -parse_size (const char *str, off_t *size_rtn) -{ - uint64_t size; - char type; - - /* Note that the parsing here is looser than what is specified in the - * help, but we may tighten it up in future so beware. - */ - if (sscanf (str, "%"SCNu64"%c", &size, &type) == 2) { - switch (type) { - case 'k': case 'K': size *= 1024; break; - case 'm': case 'M': size *= 1024 * 1024; break; - case 'g': case 'G': size *= 1024 * 1024 * 1024; break; - case 's': size *= 512; break; - default: - fprintf (stderr, "could not parse size specification '%s'\n", str); - return -1; - } - } - else if (sscanf (str, "%"SCNu64, &size) == 1) - size *= 1024; - else { - fprintf (stderr, "could not parse size specification '%s'\n", str); - return -1; - } - - printf ("size = %lu\n", size); - - /* XXX 32 bit file offsets, if anyone uses them? GCC should give - * a warning here anyhow. - */ - *size_rtn = size; - - return 0; -} - void free_strings (char **argv) { @@ -505,6 +614,15 @@ print_strings (char * const * const argv) printf ("%s\n", argv[argc]); } +void +print_table (char * const * const argv) +{ + int i; + + for (i = 0; argv[i] != NULL; i += 2) + printf ("%s: %s\n", argv[i], argv[i+1]); +} + int is_true (const char *str) { @@ -516,10 +634,7 @@ is_true (const char *str) strcasecmp (str, "no") != 0; } -/* This is quite inadequate for real use. For example, there is no way - * to specify an empty list. We need to use a real parser to allow - * quoting, empty lists, etc. - */ +/* XXX We could improve list parsing. */ char ** parse_string_list (const char *str) { @@ -529,7 +644,7 @@ parse_string_list (const char *str) argc = 1; for (i = 0; str[i]; ++i) - if (str[i] == ':') argc++; + if (str[i] == ' ') argc++; argv = malloc (sizeof (char *) * (argc+1)); if (argv == NULL) { perror ("malloc"); exit (1); } @@ -537,12 +652,63 @@ parse_string_list (const char *str) p = str; i = 0; while (*p) { - pend = strchrnul (p, ':'); + pend = strchrnul (p, ' '); argv[i] = strndup (p, pend-p); i++; - p = *pend == ':' ? pend+1 : p; + 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 +}