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1012 lines (897 loc) · 22 KB
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Copy patharguments.c
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1012 lines (897 loc) · 22 KB
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/* $OpenBSD: arguments.c,v 1.67 2026/08/25 06:04:33 nicm Exp $ */
/*
* Copyright (c) 2010 Nicholas Marriott <nicholas.marriott@gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "tmux.h"
/*
* Manipulate command arguments.
*/
/* List of argument values. */
TAILQ_HEAD(args_values, args_value);
/* Single arguments flag. */
struct args_entry {
u_char flag;
struct args_values values;
u_int count;
int flags;
#define ARGS_ENTRY_OPTIONAL_VALUE 0x1
RB_ENTRY(args_entry) entry;
};
/* Parsed argument flags and values. */
struct args {
struct args_tree tree;
u_int count;
struct args_value *values;
};
static struct args_entry *args_find(struct args *, u_char);
static int args_cmp(struct args_entry *, struct args_entry *);
RB_GENERATE_STATIC(args_tree, args_entry, entry, args_cmp);
/* Arguments tree comparison function. */
static int
args_cmp(struct args_entry *a1, struct args_entry *a2)
{
return (a1->flag - a2->flag);
}
/* Find a flag in the arguments tree. */
static struct args_entry *
args_find(struct args *args, u_char flag)
{
struct args_entry entry;
entry.flag = flag;
return (RB_FIND(args_tree, &args->tree, &entry));
}
/* Copy value. */
static void
args_copy_value(struct args_value *to, struct args_value *from)
{
to->type = from->type;
switch (from->type) {
case ARGS_NONE:
break;
case ARGS_COMMANDS:
to->cmd = cmd_parse_add_ref(from->cmd);
break;
case ARGS_STRING:
to->string = xstrdup(from->string);
break;
}
}
/* Type to string. */
static const char *
args_type_to_string (enum args_type type)
{
switch (type)
{
case ARGS_NONE:
return "NONE";
case ARGS_STRING:
return "STRING";
case ARGS_COMMANDS:
return "COMMANDS";
}
return "INVALID";
}
/* Get value as string. */
static const char *
args_value_as_string(struct args_value *value)
{
switch (value->type) {
case ARGS_NONE:
return ("");
case ARGS_COMMANDS:
if (value->cached == NULL) {
value->cached = cmd_parse_print(value->cmd,
CMD_PARSE_PRINT_RAW);
}
return (value->cached);
case ARGS_STRING:
return (value->string);
}
fatalx("unexpected argument type");
}
/* Create an empty arguments set. */
struct args *
args_create(void)
{
struct args *args;
args = xcalloc(1, sizeof *args);
RB_INIT(&args->tree);
return (args);
}
/* Parse a single flag. */
static int
args_parse_flag_argument(struct args_value *values, u_int count, char **cause,
struct args *args, u_int *i, const char *string, int flag,
int optional_argument)
{
struct args_value *argument, *new;
const char *s, *as;
new = xcalloc(1, sizeof *new);
if (*string != '\0') {
new->type = ARGS_STRING;
new->string = xstrdup(string);
goto out;
}
if (*i == count)
argument = NULL;
else {
argument = &values[*i];
if (argument->type != ARGS_STRING) {
xasprintf(cause, "-%c argument must be a string", flag);
args_free_value(new);
free(new);
return (-1);
}
}
if (argument == NULL) {
args_free_value(new);
free(new);
if (optional_argument) {
log_debug("%s: -%c (optional)", __func__, flag);
args_set(args, flag, NULL, ARGS_ENTRY_OPTIONAL_VALUE);
return (0); /* either - or end */
}
xasprintf(cause, "-%c expects an argument", flag);
return (-1);
}
if (optional_argument && argument->type == ARGS_STRING) {
as = argument->string;
if (as[0] == '-' && (as[1] == '-' || isalpha((u_char)as[1]))) {
args_free_value(new);
free(new);
log_debug("%s: -%c (optional)", __func__, flag);
args_set(args, flag, NULL, ARGS_ENTRY_OPTIONAL_VALUE);
return (0);
}
}
args_copy_value(new, argument);
(*i)++;
out:
s = args_value_as_string(new);
log_debug("%s: -%c = %s", __func__, flag, s);
args_set(args, flag, new, 0);
return (0);
}
/* Parse flags argument. */
static int
args_parse_flags(const struct args_parse *parse, struct args_value *values,
u_int count, char **cause, struct args *args, u_int *i)
{
struct args_value *value;
u_char flag;
const char *found, *string;
int optional_argument;
value = &values[*i];
if (value->type != ARGS_STRING)
return (1);
string = value->string;
log_debug("%s: next %s", __func__, string);
if (*string++ != '-' || *string == '\0')
return (1);
(*i)++;
if (string[0] == '-' && string[1] == '\0')
return (1);
for (;;) {
flag = *string++;
if (flag == '\0')
return (0);
if (flag == '?')
return (-1);
if (!isalnum(flag)) {
xasprintf(cause, "invalid flag -%c", flag);
return (-1);
}
found = strchr(parse->template, flag);
if (found == NULL) {
xasprintf(cause, "unknown flag -%c", flag);
return (-1);
}
if (found[1] != ':') {
log_debug("%s: -%c", __func__, flag);
args_set(args, flag, NULL, 0);
continue;
}
optional_argument = (found[2] == ':');
return (args_parse_flag_argument(values, count, cause, args, i,
string, flag, optional_argument));
}
}
/* Parse arguments into a new argument set. */
struct args *
args_parse(const struct args_parse *parse, struct args_value *values,
u_int count, char **cause)
{
struct args *args;
u_int i;
enum args_parse_type type;
struct args_value *value, *new;
const char *s;
int stop;
if (count == 0)
return (args_create());
args = args_create();
for (i = 1; i < count; /* nothing */) {
stop = args_parse_flags(parse, values, count, cause, args, &i);
if (stop == -1) {
args_free(args);
return (NULL);
}
if (stop == 1)
break;
}
log_debug("%s: flags end at %u of %u", __func__, i, count);
if (i != count) {
for (/* nothing */; i < count; i++) {
value = &values[i];
s = args_value_as_string(value);
log_debug("%s: %u = %s (type %s)", __func__, i, s,
args_type_to_string (value->type));
if (parse->cb != NULL) {
type = parse->cb(args, args->count, cause);
if (type == ARGS_PARSE_INVALID) {
args_free(args);
return (NULL);
}
} else
type = ARGS_PARSE_STRING;
args->values = xrecallocarray(args->values,
args->count, args->count + 1, sizeof *args->values);
new = &args->values[args->count++];
switch (type) {
case ARGS_PARSE_INVALID:
fatalx("unexpected argument type");
case ARGS_PARSE_STRING:
if (value->type != ARGS_STRING) {
xasprintf(cause,
"argument %u must be \"string\"",
args->count);
args_free(args);
return (NULL);
}
args_copy_value(new, value);
break;
case ARGS_PARSE_COMMANDS_OR_STRING:
args_copy_value(new, value);
break;
case ARGS_PARSE_COMMANDS:
if (value->type != ARGS_COMMANDS) {
xasprintf(cause,
"argument %u must be { commands }",
args->count);
args_free(args);
return (NULL);
}
args_copy_value(new, value);
break;
}
}
}
if (parse->lower != -1 && args->count < (u_int)parse->lower) {
xasprintf(cause,
"too few arguments (need at least %u)",
parse->lower);
args_free(args);
return (NULL);
}
if (parse->upper != -1 && args->count > (u_int)parse->upper) {
xasprintf(cause,
"too many arguments (need at most %u)",
parse->upper);
args_free(args);
return (NULL);
}
return (args);
}
/* Copy and expand a value. */
static void
args_copy_copy_value(struct args_value *to, struct args_value *from, int argc,
char **argv)
{
char *s, *expanded;
int i;
to->type = from->type;
switch (from->type) {
case ARGS_NONE:
break;
case ARGS_STRING:
expanded = xstrdup(from->string);
for (i = 0; i < argc; i++) {
s = cmd_template_replace(expanded, argv[i], i + 1);
free(expanded);
expanded = s;
}
to->string = expanded;
break;
case ARGS_COMMANDS:
to->cmd = cmd_parse_add_ref(from->cmd);
break;
}
}
/* Copy an arguments set. */
struct args *
args_copy(struct args *args, int argc, char **argv)
{
struct args *new_args;
struct args_entry *entry;
struct args_value *value, *new_value;
u_int i;
cmd_log_argv(argc, argv, "%s", __func__);
new_args = args_create();
RB_FOREACH(entry, args_tree, &args->tree) {
if (TAILQ_EMPTY(&entry->values)) {
for (i = 0; i < entry->count; i++)
args_set(new_args, entry->flag, NULL, 0);
continue;
}
TAILQ_FOREACH(value, &entry->values, entry) {
new_value = xcalloc(1, sizeof *new_value);
args_copy_copy_value(new_value, value, argc, argv);
args_set(new_args, entry->flag, new_value, 0);
}
}
if (args->count == 0)
return (new_args);
new_args->count = args->count;
new_args->values = xcalloc(args->count, sizeof *new_args->values);
for (i = 0; i < args->count; i++) {
new_value = &new_args->values[i];
args_copy_copy_value(new_value, &args->values[i], argc, argv);
}
return (new_args);
}
/* Free a value. */
void
args_free_value(struct args_value *value)
{
switch (value->type) {
case ARGS_NONE:
break;
case ARGS_STRING:
free(value->string);
break;
case ARGS_COMMANDS:
cmd_parse_free(value->cmd);
break;
}
free(value->cached);
}
/* Free values. */
void
args_free_values(struct args_value *values, u_int count)
{
u_int i;
for (i = 0; i < count; i++)
args_free_value(&values[i]);
}
/* Free an arguments set. */
void
args_free(struct args *args)
{
struct args_entry *entry;
struct args_entry *entry1;
struct args_value *value;
struct args_value *value1;
args_free_values(args->values, args->count);
free(args->values);
RB_FOREACH_SAFE(entry, args_tree, &args->tree, entry1) {
RB_REMOVE(args_tree, &args->tree, entry);
TAILQ_FOREACH_SAFE(value, &entry->values, entry, value1) {
TAILQ_REMOVE(&entry->values, value, entry);
args_free_value(value);
free(value);
}
free(entry);
}
free(args);
}
/* Convert arguments to vector. */
void
args_to_vector(struct args *args, int *argc, char ***argv)
{
char *s;
u_int i;
*argc = 0;
*argv = NULL;
for (i = 0; i < args->count; i++) {
switch (args->values[i].type) {
case ARGS_NONE:
break;
case ARGS_STRING:
cmd_append_argv(argc, argv, args->values[i].string);
break;
case ARGS_COMMANDS:
s = cmd_parse_print(args->values[i].cmd, 0);
cmd_append_argv(argc, argv, s);
free(s);
break;
}
}
}
/* Convert arguments from vector. */
struct args_value *
args_from_vector(int argc, char **argv)
{
struct args_value *values;
int i;
values = xcalloc(argc, sizeof *values);
for (i = 0; i < argc; i++) {
values[i].type = ARGS_STRING;
values[i].string = xstrdup(argv[i]);
}
return (values);
}
/* Add to string. */
static void printflike(3, 4)
args_print_add(char **buf, size_t *len, const char *fmt, ...)
{
va_list ap;
char *s;
size_t slen;
va_start(ap, fmt);
slen = xvasprintf(&s, fmt, ap);
va_end(ap);
*len += slen;
*buf = xrealloc(*buf, *len);
strlcat(*buf, s, *len);
free(s);
}
/* Add value to string. */
static void
args_print_add_value(char **buf, size_t *len, struct args_value *value)
{
char *expanded = NULL;
if (**buf != '\0')
args_print_add(buf, len, " ");
switch (value->type) {
case ARGS_NONE:
break;
case ARGS_COMMANDS:
expanded = cmd_parse_print(value->cmd, 0);
args_print_add(buf, len, "{ %s }", expanded);
break;
case ARGS_STRING:
expanded = args_escape(value->string);
args_print_add(buf, len, "%s", expanded);
break;
}
free(expanded);
}
/* Print a set of arguments. */
char *
args_print(struct args *args)
{
size_t len;
char *buf;
u_int i, j;
struct args_entry *entry;
struct args_entry *last = NULL;
struct args_value *value;
len = 1;
buf = xcalloc(1, len);
/* Process the flags first. */
RB_FOREACH(entry, args_tree, &args->tree) {
if (entry->flags & ARGS_ENTRY_OPTIONAL_VALUE)
continue;
if (!TAILQ_EMPTY(&entry->values))
continue;
if (*buf == '\0')
args_print_add(&buf, &len, "-");
for (j = 0; j < entry->count; j++)
args_print_add(&buf, &len, "%c", entry->flag);
}
/* Then the flags with arguments. */
RB_FOREACH(entry, args_tree, &args->tree) {
if (entry->flags & ARGS_ENTRY_OPTIONAL_VALUE) {
if (*buf != '\0')
args_print_add(&buf, &len, " -%c", entry->flag);
else
args_print_add(&buf, &len, "-%c", entry->flag);
last = entry;
continue;
}
if (TAILQ_EMPTY(&entry->values))
continue;
TAILQ_FOREACH(value, &entry->values, entry) {
if (*buf != '\0')
args_print_add(&buf, &len, " -%c", entry->flag);
else
args_print_add(&buf, &len, "-%c", entry->flag);
args_print_add_value(&buf, &len, value);
}
last = entry;
}
if (last && (last->flags & ARGS_ENTRY_OPTIONAL_VALUE))
args_print_add(&buf, &len, " --");
/* And finally the argument vector. */
for (i = 0; i < args->count; i++)
args_print_add_value(&buf, &len, &args->values[i]);
return (buf);
}
/* Escape an argument. */
char *
args_escape(const char *s)
{
static const char dquoted[] = " #';${}%";
static const char squoted[] = " \"";
char *escaped, *result;
int flags, quotes = 0;
if (*s == '\0') {
xasprintf(&result, "''");
return (result);
}
if (s[strcspn(s, dquoted)] != '\0')
quotes = '"';
else if (s[strcspn(s, squoted)] != '\0')
quotes = '\'';
if (s[0] != ' ' &&
s[1] == '\0' &&
(quotes != 0 || s[0] == '~')) {
xasprintf(&escaped, "\\%c", s[0]);
return (escaped);
}
flags = VIS_OCTAL|VIS_CSTYLE|VIS_TAB|VIS_NL;
if (quotes == '"')
flags |= VIS_DQ;
utf8_stravis(&escaped, s, flags);
if (quotes == '\'')
xasprintf(&result, "'%s'", escaped);
else if (quotes == '"') {
if (*escaped == '~')
xasprintf(&result, "\"\\%s\"", escaped);
else
xasprintf(&result, "\"%s\"", escaped);
} else {
if (*escaped == '~')
xasprintf(&result, "\\%s", escaped);
else
result = xstrdup(escaped);
}
free(escaped);
return (result);
}
/* Return if an argument is present. */
int
args_has(struct args *args, u_char flag)
{
struct args_entry *entry;
entry = args_find(args, flag);
if (entry == NULL)
return (0);
return (entry->count);
}
/* Set argument value in the arguments tree. */
void
args_set(struct args *args, u_char flag, struct args_value *value, int flags)
{
struct args_entry *entry;
entry = args_find(args, flag);
if (entry == NULL) {
entry = xcalloc(1, sizeof *entry);
entry->flag = flag;
entry->count = 1;
entry->flags = flags;
TAILQ_INIT(&entry->values);
RB_INSERT(args_tree, &args->tree, entry);
} else
entry->count++;
if (value != NULL && value->type != ARGS_NONE)
TAILQ_INSERT_TAIL(&entry->values, value, entry);
else
free(value);
}
/* Get argument value. Will be NULL if it isn't present. */
const char *
args_get(struct args *args, u_char flag)
{
struct args_entry *entry;
if ((entry = args_find(args, flag)) == NULL)
return (NULL);
if (TAILQ_EMPTY(&entry->values))
return (NULL);
return (TAILQ_LAST(&entry->values, args_values)->string);
}
/* Get first argument. */
u_char
args_first(struct args *args, struct args_entry **entry)
{
*entry = RB_MIN(args_tree, &args->tree);
if (*entry == NULL)
return (0);
return ((*entry)->flag);
}
/* Get next argument. */
u_char
args_next(struct args_entry **entry)
{
*entry = RB_NEXT(args_tree, &args->tree, *entry);
if (*entry == NULL)
return (0);
return ((*entry)->flag);
}
/* Get argument count. */
u_int
args_count(struct args *args)
{
return (args->count);
}
/* Get argument values. */
struct args_value *
args_values(struct args *args)
{
return (args->values);
}
/* Get argument value. */
struct args_value *
args_value(struct args *args, u_int idx)
{
if (idx >= args->count)
return (NULL);
return (&args->values[idx]);
}
/* Return argument as string. */
const char *
args_string(struct args *args, u_int idx)
{
if (idx >= args->count)
return (NULL);
return (args_value_as_string(&args->values[idx]));
}
/*
* Convert one command argument into a parse tree. A string value is parsed;
* existing commands are referenced.
*/
struct cmd_parse_tree *
args_to_commands(struct cmd *self, struct cmdq_item *item, u_int idx,
const char *default_command, int expand, char **cause)
{
struct args *args = cmd_get_args(self);
struct args_value *value;
struct cmd_parse_input pi = { 0 };
const char *cmd = NULL, *file;
char *expanded;
struct cmd_parse_tree *tree;
*cause = NULL;
if (idx >= args->count)
cmd = default_command;
else {
value = &args->values[idx];
switch (value->type) {
case ARGS_COMMANDS:
return (cmd_parse_add_ref(value->cmd));
case ARGS_STRING:
cmd = value->string;
break;
case ARGS_NONE:
break;
}
}
if (cmd == NULL)
fatalx("argument out of range");
if (expand)
expanded = format_single_from_target(item, cmd);
else
expanded = xstrdup(cmd);
log_debug("%s: %s", __func__, expanded);
cmd_get_source(self, &file, &pi.line);
if (file != NULL)
pi.file = file;
pi.flags = cmd_get_parse_flags(self);
tree = cmd_parse_from_string(expanded, &pi, cause);
free(expanded);
return (tree);
}
/* Get first value in argument. */
struct args_value *
args_first_value(struct args *args, u_char flag)
{
struct args_entry *entry;
if ((entry = args_find(args, flag)) == NULL)
return (NULL);
return (TAILQ_FIRST(&entry->values));
}
/* Get next value in argument. */
struct args_value *
args_next_value(struct args_value *value)
{
return (TAILQ_NEXT(value, entry));
}
/* Convert an argument value to a number. */
long long
args_strtonum(struct args *args, u_char flag, long long minval,
long long maxval, char **cause)
{
const char *errstr;
long long ll;
struct args_entry *entry;
struct args_value *value;
if ((entry = args_find(args, flag)) == NULL) {
*cause = xstrdup("missing");
return (0);
}
value = TAILQ_LAST(&entry->values, args_values);
if (value == NULL ||
value->type != ARGS_STRING ||
value->string == NULL) {
*cause = xstrdup("missing");
return (0);
}
ll = strtonum(value->string, minval, maxval, &errstr);
if (errstr != NULL) {
*cause = xstrdup(errstr);
return (0);
}
*cause = NULL;
return (ll);
}
/* Convert an argument value to a number, and expand formats. */
long long
args_strtonum_and_expand(struct args *args, u_char flag, long long minval,
long long maxval, struct cmdq_item *item, char **cause)
{
const char *errstr;
char *formatted;
long long ll;
struct args_entry *entry;
struct args_value *value;
if ((entry = args_find(args, flag)) == NULL) {
*cause = xstrdup("missing");
return (0);
}
value = TAILQ_LAST(&entry->values, args_values);
if (value == NULL ||
value->type != ARGS_STRING ||
value->string == NULL) {
*cause = xstrdup("missing");
return (0);
}
formatted = format_single_from_target(item, value->string);
ll = strtonum(formatted, minval, maxval, &errstr);
free(formatted);
if (errstr != NULL) {
*cause = xstrdup(errstr);
return (0);
}
*cause = NULL;
return (ll);
}
/* Convert an argument to a number which may be a percentage. */
long long
args_percentage(struct args *args, u_char flag, long long minval,
long long maxval, long long curval, char **cause)
{
const char *value;
struct args_entry *entry;
if ((entry = args_find(args, flag)) == NULL) {
*cause = xstrdup("missing");
return (0);
}
if (TAILQ_EMPTY(&entry->values)) {
*cause = xstrdup("empty");
return (0);
}
value = TAILQ_LAST(&entry->values, args_values)->string;
return (args_string_percentage(value, minval, maxval, curval, cause));
}
/* Convert a string to a number which may be a percentage. */
long long
args_string_percentage(const char *value, long long minval, long long maxval,
long long curval, char **cause)
{
const char *errstr;
long long ll;
size_t valuelen = strlen(value);
char *copy;
if (valuelen == 0) {
*cause = xstrdup("empty");
return (0);
}
if (value[valuelen - 1] == '%') {
copy = xstrdup(value);
copy[valuelen - 1] = '\0';
ll = strtonum(copy, 0, 1000, &errstr);
free(copy);
if (errstr != NULL) {
*cause = xstrdup(errstr);
return (0);
}
ll = (curval * ll) / 100;
if (ll < minval) {
*cause = xstrdup("too small");
return (0);
}
if (ll > maxval) {
*cause = xstrdup("too large");
return (0);
}
} else {
ll = strtonum(value, minval, maxval, &errstr);
if (errstr != NULL) {
*cause = xstrdup(errstr);
return (0);
}
}
*cause = NULL;
return (ll);
}
/*
* Convert an argument to a number which may be a percentage, and expand
* formats.
*/
long long
args_percentage_and_expand(struct args *args, u_char flag, long long minval,
long long maxval, long long curval, struct cmdq_item *item, char **cause)
{
const char *value;
struct args_entry *entry;
if ((entry = args_find(args, flag)) == NULL) {
*cause = xstrdup("missing");
return (0);
}
if (TAILQ_EMPTY(&entry->values)) {
*cause = xstrdup("empty");
return (0);
}
value = TAILQ_LAST(&entry->values, args_values)->string;
return (args_string_percentage_and_expand(value, minval, maxval, curval,
item, cause));
}
/*
* Convert a string to a number which may be a percentage, and expand formats.
*/
long long
args_string_percentage_and_expand(const char *value, long long minval,
long long maxval, long long curval, struct cmdq_item *item, char **cause)
{
const char *errstr;
long long ll;
size_t valuelen = strlen(value);
char *copy, *f;
if (value[valuelen - 1] == '%') {
copy = xstrdup(value);
copy[valuelen - 1] = '\0';
f = format_single_from_target(item, copy);
ll = strtonum(f, 0, 1000, &errstr);
free(f);
free(copy);
if (errstr != NULL) {
*cause = xstrdup(errstr);
return (0);
}
ll = (curval * ll) / 100;
if (ll < minval) {
*cause = xstrdup("too small");
return (0);
}
if (ll > maxval) {
*cause = xstrdup("too large");
return (0);
}
} else {