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Add support for custom command aliases, this is an array option which

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contains items of the form "alias=command". This is consulted when an
unknown command is parsed.
This commit is contained in:
nicm
2017-01-24 19:53:37 +00:00
parent 61fce272ea
commit 85338bb75f
6 changed files with 91 additions and 47 deletions
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94
cmd-string.c
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@ -54,17 +54,15 @@ cmd_string_ungetc(size_t *p)
(*p)--;
}
struct cmd_list *
cmd_string_parse(const char *s, const char *file, u_int line, char **cause)
int
cmd_string_split(const char *s, int *rargc, char ***rargv)
{
size_t p = 0;
int ch, i, argc = 0;
char **argv = NULL, *buf = NULL, *t;
const char *whitespace, *equals;
size_t len = 0;
struct cmd_list *cmdlist = NULL;
size_t p = 0;
int ch, argc = 0, append = 0;
char **argv = NULL, *buf = NULL, *t;
const char *whitespace, *equals;
size_t len = 0;
*cause = NULL;
for (;;) {
ch = cmd_string_getc(s, &p);
switch (ch) {
@ -115,43 +113,67 @@ cmd_string_parse(const char *s, const char *file, u_int line, char **cause)
argc--;
memmove(argv, argv + 1, argc * (sizeof *argv));
}
if (argc == 0)
goto out;
cmdlist = cmd_list_parse(argc, argv, file, line, cause);
goto out;
goto done;
case '~':
if (buf == NULL) {
t = cmd_string_expand_tilde(s, &p);
if (t == NULL)
goto error;
cmd_string_copy(&buf, t, &len);
if (buf != NULL) {
append = 1;
break;
}
/* FALLTHROUGH */
default:
if (len >= SIZE_MAX - 2)
t = cmd_string_expand_tilde(s, &p);
if (t == NULL)
goto error;
buf = xrealloc(buf, len + 1);
buf[len++] = ch;
cmd_string_copy(&buf, t, &len);
break;
default:
append = 1;
break;
}
if (append) {
if (len >= SIZE_MAX - 2)
goto error;
buf = xrealloc(buf, len + 1);
buf[len++] = ch;
}
append = 0;
}
done:
*rargc = argc;
*rargv = argv;
free(buf);
return (0);
error:
if (argv != NULL)
cmd_free_argv(argc, argv);
free(buf);
return (-1);
}
struct cmd_list *
cmd_string_parse(const char *s, const char *file, u_int line, char **cause)
{
struct cmd_list *cmdlist = NULL;
int argc;
char **argv;
*cause = NULL;
if (cmd_string_split(s, &argc, &argv) != 0)
goto error;
if (argc != 0) {
cmdlist = cmd_list_parse(argc, argv, file, line, cause);
if (cmdlist == NULL) {
cmd_free_argv(argc, argv);
goto error;
}
}
cmd_free_argv(argc, argv);
return (cmdlist);
error:
xasprintf(cause, "invalid or unknown command: %s", s);
out:
free(buf);
if (argv != NULL) {
for (i = 0; i < argc; i++)
free(argv[i]);
free(argv);
}
return (cmdlist);
return (NULL);
}
static void