X-Git-Url: http://git.annexia.org/?a=blobdiff_plain;f=fish%2Ffish.c;h=b825626bcf3c39bbfbe9956fe89ffb53d64b377e;hb=212a55d483c2a20e61f42211c0c64aab3645cb09;hp=e845e4de63d3154da9c3383078ed8d9744fc870c;hpb=94050e0344685b6916e21581e618ad3e85795008;p=libguestfs.git diff --git a/fish/fish.c b/fish/fish.c index e845e4d..b825626 100644 --- a/fish/fish.c +++ b/fish/fish.c @@ -18,6 +18,8 @@ #include +#define _GNU_SOURCE // for strchrnul + #include #include #include @@ -27,6 +29,11 @@ #include #include +#ifdef HAVE_LIBREADLINE +#include +#include +#endif + #include #include "fish.h" @@ -44,6 +51,9 @@ 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; @@ -112,6 +122,8 @@ 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. */ @@ -206,6 +218,8 @@ main (int argc, char *argv[]) else cmdline (argv, optind, argc); + cleanup_readline (); + exit (0); } @@ -252,13 +266,51 @@ shell_script (void) script (0); } +#define FISH "> " + +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" @@ -270,32 +322,124 @@ 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+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"); } @@ -474,8 +618,6 @@ parse_size (const char *str, off_t *size_rtn) return -1; } - printf ("size = %lu\n", size); - /* XXX 32 bit file offsets, if anyone uses them? GCC should give * a warning here anyhow. */ @@ -495,7 +637,7 @@ free_strings (char **argv) } void -print_strings (char **argv) +print_strings (char * const * const argv) { int argc; @@ -513,3 +655,82 @@ is_true (const char *str) 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 +}