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-rw-r--r--fish/fish.c324
1 files changed, 170 insertions, 154 deletions
diff --git a/fish/fish.c b/fish/fish.c
index fbc364fc..566d769f 100644
--- a/fish/fish.c
+++ b/fish/fish.c
@@ -45,6 +45,14 @@
#include "closeout.h"
#include "progname.h"
+/* Return from parse_command_line. See description below. */
+struct parsed_command {
+ int status;
+ char *pipe;
+ char *cmd;
+ char *argv[64];
+};
+
static void set_up_terminal (void);
static void prepare_drives (struct drv *drv);
static int launch (void);
@@ -52,6 +60,7 @@ static void interactive (void);
static void shell_script (void);
static void script (int prompt);
static void cmdline (char *argv[], int optind, int argc);
+static struct parsed_command parse_command_line (char *buf, int *exit_on_error_rtn);
static void initialize_readline (void);
static void cleanup_readline (void);
#ifdef HAVE_LIBREADLINE
@@ -605,13 +614,9 @@ static void
script (int prompt)
{
char *buf;
- char *cmd;
- char *p, *pend;
- char *argv[64];
- int len;
int global_exit_on_error = !prompt;
int exit_on_error;
- int tilde_candidate;
+ struct parsed_command pcmd;
if (prompt) {
printf (_("\n"
@@ -630,8 +635,6 @@ script (int prompt)
}
while (!quit) {
- char *pipe = NULL;
-
exit_on_error = global_exit_on_error;
buf = rl_gets (prompt);
@@ -640,171 +643,184 @@ script (int prompt)
break;
}
- /* Skip any initial whitespace before the command. */
- again:
- while (*buf && c_isspace (*buf))
- buf++;
-
- if (!*buf) continue;
+ pcmd = parse_command_line (buf, &exit_on_error);
+ if (pcmd.status == -1 && exit_on_error)
+ exit (EXIT_FAILURE);
+ if (pcmd.status == 1) {
+ if (issue_command (pcmd.cmd, pcmd.argv, pcmd.pipe, exit_on_error) == -1) {
+ if (exit_on_error) exit (EXIT_FAILURE);
+ }
+ }
+ }
+ if (prompt) printf ("\n");
+}
- /* If the next character is '#' then this is a comment. */
- if (*buf == '#') continue;
+/* Parse a command string, splitting at whitespace, handling '!', '#' etc.
+ * This destructively updates 'buf'.
+ *
+ * 'exit_on_error_rtn' is used to pass in the global exit_on_error
+ * setting and to return the local setting (eg. if the command begins
+ * with '-').
+ *
+ * Returns in parsed_command.status:
+ * 1 = got a guestfish command (returned in cmd_rtn/argv_rtn/pipe_rtn)
+ * 0 = no guestfish command, but otherwise OK
+ * -1 = an error
+ */
+static struct parsed_command
+parse_command_line (char *buf, int *exit_on_error_rtn)
+{
+ struct parsed_command pcmd;
+ char *p, *pend;
+ int len;
+ int tilde_candidate;
+ int r;
+ const size_t argv_len = sizeof pcmd.argv / sizeof pcmd.argv[0];
- /* If the next character is '!' then pass the whole lot to system(3). */
- if (*buf == '!') {
- int r;
+ pcmd.pipe = NULL;
- r = system (buf+1);
- if (exit_on_error) {
- if (r == -1 ||
- (WIFSIGNALED (r) &&
- (WTERMSIG (r) == SIGINT || WTERMSIG (r) == SIGQUIT)) ||
- WEXITSTATUS (r) != 0)
- exit (EXIT_FAILURE);
- }
- continue;
- }
+ again:
+ /* Skip any initial whitespace before the command. */
+ while (*buf && c_isspace (*buf))
+ buf++;
- /* If the next character is '-' allow the command to fail without
- * exiting on error (just for this one command though).
- */
- if (*buf == '-') {
- exit_on_error = 0;
- buf++;
- goto again;
- }
+ if (!*buf) {
+ pcmd.status = 0;
+ return pcmd;
+ }
- /* Get the command (cannot be quoted). */
- len = strcspn (buf, " \t");
+ /* If the next character is '#' then this is a comment. */
+ if (*buf == '#') {
+ pcmd.status = 0;
+ return pcmd;
+ }
- if (len == 0) continue;
+ /* If the next character is '!' then pass the whole lot to system(3). */
+ if (*buf == '!') {
+ r = system (buf+1);
+ if (r == -1 ||
+ (WIFSIGNALED (r) &&
+ (WTERMSIG (r) == SIGINT || WTERMSIG (r) == SIGQUIT)) ||
+ WEXITSTATUS (r) != 0)
+ pcmd.status = -1;
+ else
+ pcmd.status = 0;
+ return pcmd;
+ }
- cmd = buf;
- unsigned int i = 0;
- if (buf[len] == '\0') {
- argv[0] = NULL;
- goto got_command;
- }
+ /* If the next character is '-' allow the command to fail without
+ * exiting on error (just for this one command though).
+ */
+ if (*buf == '-') {
+ *exit_on_error_rtn = 0;
+ buf++;
+ goto again;
+ }
- buf[len] = '\0';
- p = &buf[len+1];
- p += strspn (p, " \t");
+ /* Get the command (cannot be quoted). */
+ len = strcspn (buf, " \t");
- /* Get the parameters. */
- while (*p && i < sizeof argv / sizeof argv[0]) {
- tilde_candidate = 0;
+ if (len == 0) {
+ pcmd.status = 0;
+ return pcmd;
+ }
- /* Parameters which start with quotes or pipes are treated
- * specially. Bare parameters are delimited by whitespace.
- */
- if (*p == '"') {
- p++;
- len = strcspn (p, "\"");
- if (p[len] == '\0') {
- fprintf (stderr, _("%s: unterminated double quote\n"), program_name);
- if (exit_on_error) exit (EXIT_FAILURE);
- goto next_command;
- }
- if (p[len+1] && (p[len+1] != ' ' && p[len+1] != '\t')) {
- fprintf (stderr,
- _("%s: command arguments not separated by whitespace\n"),
- program_name);
- if (exit_on_error) exit (EXIT_FAILURE);
- 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, _("%s: unterminated single quote\n"), program_name);
- if (exit_on_error) exit (EXIT_FAILURE);
- goto next_command;
- }
- if (p[len+1] && (p[len+1] != ' ' && p[len+1] != '\t')) {
- fprintf (stderr,
- _("%s: command arguments not separated by whitespace\n"),
- program_name);
- if (exit_on_error) exit (EXIT_FAILURE);
- goto next_command;
- }
- p[len] = '\0';
- pend = p[len+1] ? &p[len+2] : &p[len+1];
- } else if (*p == '|') {
- *p = '\0';
- pipe = p+1;
- continue;
- /*
- } 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,
- _("%s: unterminated \"[...]\" sequence\n"), program_name);
- if (exit_on_error) exit (EXIT_FAILURE);
- goto next_command;
- }
- if (*pend && (*pend != ' ' && *pend != '\t')) {
- fprintf (stderr,
- _("%s: command arguments not separated by whitespace\n"),
- program_name);
- if (exit_on_error) exit (EXIT_FAILURE);
- goto next_command;
- }
- *(pend-1) = '\0';
- */
- } else if (*p != ' ' && *p != '\t') {
- /* If the first character is a ~ then note that this parameter
- * is a candidate for ~username expansion. NB this does not
- * apply to quoted parameters.
- */
- tilde_candidate = *p == '~';
- len = strcspn (p, " \t");
- if (p[len]) {
- p[len] = '\0';
- pend = &p[len+1];
- } else
- pend = &p[len];
- } else {
- fprintf (stderr, _("%s: internal error parsing string at '%s'\n"),
- program_name, p);
- abort ();
- }
+ pcmd.cmd = buf;
+ unsigned int i = 0;
+ if (buf[len] == '\0') {
+ pcmd.argv[0] = NULL;
+ pcmd.status = 1;
+ return pcmd;
+ }
- if (!tilde_candidate)
- argv[i] = p;
- else
- argv[i] = try_tilde_expansion (p);
- i++;
- p = pend;
+ buf[len] = '\0';
+ p = &buf[len+1];
+ p += strspn (p, " \t");
- if (*p)
- p += strspn (p, " \t");
- }
+ /* Get the parameters. */
+ while (*p && i < argv_len) {
+ tilde_candidate = 0;
- if (i == sizeof argv / sizeof argv[0]) {
- fprintf (stderr, _("%s: too many arguments\n"), program_name);
- if (exit_on_error) exit (EXIT_FAILURE);
- goto next_command;
+ /* Parameters which start with quotes or pipes are treated
+ * specially. Bare parameters are delimited by whitespace.
+ */
+ if (*p == '"') {
+ p++;
+ len = strcspn (p, "\"");
+ if (p[len] == '\0') {
+ fprintf (stderr, _("%s: unterminated double quote\n"), program_name);
+ pcmd.status = -1;
+ return pcmd;
+ }
+ if (p[len+1] && (p[len+1] != ' ' && p[len+1] != '\t')) {
+ fprintf (stderr,
+ _("%s: command arguments not separated by whitespace\n"),
+ program_name);
+ pcmd.status = -1;
+ return pcmd;
+ }
+ 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, _("%s: unterminated single quote\n"), program_name);
+ pcmd.status = -1;
+ return pcmd;
+ }
+ if (p[len+1] && (p[len+1] != ' ' && p[len+1] != '\t')) {
+ fprintf (stderr,
+ _("%s: command arguments not separated by whitespace\n"),
+ program_name);
+ pcmd.status = -1;
+ return pcmd;
+ }
+ p[len] = '\0';
+ pend = p[len+1] ? &p[len+2] : &p[len+1];
+ } else if (*p == '|') {
+ *p = '\0';
+ pcmd.pipe = p+1;
+ continue;
+ } else if (*p != ' ' && *p != '\t') {
+ /* If the first character is a ~ then note that this parameter
+ * is a candidate for ~username expansion. NB this does not
+ * apply to quoted parameters.
+ */
+ tilde_candidate = *p == '~';
+ len = strcspn (p, " \t");
+ if (p[len]) {
+ p[len] = '\0';
+ pend = &p[len+1];
+ } else
+ pend = &p[len];
+ } else {
+ fprintf (stderr, _("%s: internal error parsing string at '%s'\n"),
+ program_name, p);
+ abort ();
}
- argv[i] = NULL;
+ if (!tilde_candidate)
+ pcmd.argv[i] = p;
+ else
+ pcmd.argv[i] = try_tilde_expansion (p);
+ i++;
+ p = pend;
- got_command:
- if (issue_command (cmd, argv, pipe, exit_on_error) == -1) {
- if (exit_on_error) exit (EXIT_FAILURE);
- }
+ if (*p)
+ p += strspn (p, " \t");
+ }
- next_command:;
+ if (i == argv_len) {
+ fprintf (stderr, _("%s: too many arguments\n"), program_name);
+ pcmd.status = -1;
+ return pcmd;
}
- if (prompt) printf ("\n");
+
+ pcmd.argv[i] = NULL;
+
+ pcmd.status = 1;
+ return pcmd;
}
static void