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cmd.c
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882 lines (770 loc) · 21 KB
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/* $OpenBSD$ */
/*
* Copyright (c) 2007 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 <sys/time.h>
#include <fnmatch.h>
#include <pwd.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "tmux.h"
extern const struct cmd_entry cmd_attach_session_entry;
extern const struct cmd_entry cmd_bind_key_entry;
extern const struct cmd_entry cmd_break_pane_entry;
extern const struct cmd_entry cmd_capture_pane_entry;
extern const struct cmd_entry cmd_choose_buffer_entry;
extern const struct cmd_entry cmd_choose_client_entry;
extern const struct cmd_entry cmd_choose_tree_entry;
extern const struct cmd_entry cmd_clear_history_entry;
extern const struct cmd_entry cmd_clear_prompt_history_entry;
extern const struct cmd_entry cmd_clock_mode_entry;
extern const struct cmd_entry cmd_command_prompt_entry;
extern const struct cmd_entry cmd_confirm_before_entry;
extern const struct cmd_entry cmd_copy_mode_entry;
extern const struct cmd_entry cmd_customize_mode_entry;
extern const struct cmd_entry cmd_delete_buffer_entry;
extern const struct cmd_entry cmd_detach_client_entry;
extern const struct cmd_entry cmd_display_menu_entry;
extern const struct cmd_entry cmd_display_message_entry;
extern const struct cmd_entry cmd_display_popup_entry;
extern const struct cmd_entry cmd_display_panes_entry;
extern const struct cmd_entry cmd_find_window_entry;
extern const struct cmd_entry cmd_has_session_entry;
extern const struct cmd_entry cmd_if_shell_entry;
extern const struct cmd_entry cmd_join_pane_entry;
extern const struct cmd_entry cmd_kill_pane_entry;
extern const struct cmd_entry cmd_kill_server_entry;
extern const struct cmd_entry cmd_kill_session_entry;
extern const struct cmd_entry cmd_kill_window_entry;
extern const struct cmd_entry cmd_last_pane_entry;
extern const struct cmd_entry cmd_last_window_entry;
extern const struct cmd_entry cmd_link_window_entry;
extern const struct cmd_entry cmd_list_buffers_entry;
extern const struct cmd_entry cmd_list_clients_entry;
extern const struct cmd_entry cmd_list_commands_entry;
extern const struct cmd_entry cmd_list_keys_entry;
extern const struct cmd_entry cmd_list_panes_entry;
extern const struct cmd_entry cmd_list_sessions_entry;
extern const struct cmd_entry cmd_list_windows_entry;
extern const struct cmd_entry cmd_load_buffer_entry;
extern const struct cmd_entry cmd_lock_client_entry;
extern const struct cmd_entry cmd_lock_server_entry;
extern const struct cmd_entry cmd_lock_session_entry;
extern const struct cmd_entry cmd_move_pane_entry;
extern const struct cmd_entry cmd_move_window_entry;
extern const struct cmd_entry cmd_new_session_entry;
extern const struct cmd_entry cmd_new_window_entry;
extern const struct cmd_entry cmd_next_layout_entry;
extern const struct cmd_entry cmd_next_window_entry;
extern const struct cmd_entry cmd_paste_buffer_entry;
extern const struct cmd_entry cmd_pipe_pane_entry;
extern const struct cmd_entry cmd_previous_layout_entry;
extern const struct cmd_entry cmd_previous_window_entry;
extern const struct cmd_entry cmd_refresh_client_entry;
extern const struct cmd_entry cmd_rename_session_entry;
extern const struct cmd_entry cmd_rename_window_entry;
extern const struct cmd_entry cmd_resize_pane_entry;
extern const struct cmd_entry cmd_resize_window_entry;
extern const struct cmd_entry cmd_respawn_pane_entry;
extern const struct cmd_entry cmd_respawn_window_entry;
extern const struct cmd_entry cmd_rotate_window_entry;
extern const struct cmd_entry cmd_run_shell_entry;
extern const struct cmd_entry cmd_save_buffer_entry;
extern const struct cmd_entry cmd_select_layout_entry;
extern const struct cmd_entry cmd_select_pane_entry;
extern const struct cmd_entry cmd_select_window_entry;
extern const struct cmd_entry cmd_send_keys_entry;
extern const struct cmd_entry cmd_send_prefix_entry;
extern const struct cmd_entry cmd_server_access_entry;
extern const struct cmd_entry cmd_set_buffer_entry;
extern const struct cmd_entry cmd_set_environment_entry;
extern const struct cmd_entry cmd_set_hook_entry;
extern const struct cmd_entry cmd_set_option_entry;
extern const struct cmd_entry cmd_set_window_option_entry;
extern const struct cmd_entry cmd_show_buffer_entry;
extern const struct cmd_entry cmd_show_environment_entry;
extern const struct cmd_entry cmd_show_hooks_entry;
extern const struct cmd_entry cmd_show_messages_entry;
extern const struct cmd_entry cmd_show_options_entry;
extern const struct cmd_entry cmd_show_prompt_history_entry;
extern const struct cmd_entry cmd_show_window_options_entry;
extern const struct cmd_entry cmd_source_file_entry;
extern const struct cmd_entry cmd_split_window_entry;
extern const struct cmd_entry cmd_start_server_entry;
extern const struct cmd_entry cmd_suspend_client_entry;
extern const struct cmd_entry cmd_swap_pane_entry;
extern const struct cmd_entry cmd_swap_window_entry;
extern const struct cmd_entry cmd_switch_client_entry;
extern const struct cmd_entry cmd_unbind_key_entry;
extern const struct cmd_entry cmd_unlink_window_entry;
extern const struct cmd_entry cmd_wait_for_entry;
const struct cmd_entry *cmd_table[] = {
&cmd_attach_session_entry,
&cmd_bind_key_entry,
&cmd_break_pane_entry,
&cmd_capture_pane_entry,
&cmd_choose_buffer_entry,
&cmd_choose_client_entry,
&cmd_choose_tree_entry,
&cmd_clear_history_entry,
&cmd_clear_prompt_history_entry,
&cmd_clock_mode_entry,
&cmd_command_prompt_entry,
&cmd_confirm_before_entry,
&cmd_copy_mode_entry,
&cmd_customize_mode_entry,
&cmd_delete_buffer_entry,
&cmd_detach_client_entry,
&cmd_display_menu_entry,
&cmd_display_message_entry,
&cmd_display_popup_entry,
&cmd_display_panes_entry,
&cmd_find_window_entry,
&cmd_has_session_entry,
&cmd_if_shell_entry,
&cmd_join_pane_entry,
&cmd_kill_pane_entry,
&cmd_kill_server_entry,
&cmd_kill_session_entry,
&cmd_kill_window_entry,
&cmd_last_pane_entry,
&cmd_last_window_entry,
&cmd_link_window_entry,
&cmd_list_buffers_entry,
&cmd_list_clients_entry,
&cmd_list_commands_entry,
&cmd_list_keys_entry,
&cmd_list_panes_entry,
&cmd_list_sessions_entry,
&cmd_list_windows_entry,
&cmd_load_buffer_entry,
&cmd_lock_client_entry,
&cmd_lock_server_entry,
&cmd_lock_session_entry,
&cmd_move_pane_entry,
&cmd_move_window_entry,
&cmd_new_session_entry,
&cmd_new_window_entry,
&cmd_next_layout_entry,
&cmd_next_window_entry,
&cmd_paste_buffer_entry,
&cmd_pipe_pane_entry,
&cmd_previous_layout_entry,
&cmd_previous_window_entry,
&cmd_refresh_client_entry,
&cmd_rename_session_entry,
&cmd_rename_window_entry,
&cmd_resize_pane_entry,
&cmd_resize_window_entry,
&cmd_respawn_pane_entry,
&cmd_respawn_window_entry,
&cmd_rotate_window_entry,
&cmd_run_shell_entry,
&cmd_save_buffer_entry,
&cmd_select_layout_entry,
&cmd_select_pane_entry,
&cmd_select_window_entry,
&cmd_send_keys_entry,
&cmd_send_prefix_entry,
&cmd_server_access_entry,
&cmd_set_buffer_entry,
&cmd_set_environment_entry,
&cmd_set_hook_entry,
&cmd_set_option_entry,
&cmd_set_window_option_entry,
&cmd_show_buffer_entry,
&cmd_show_environment_entry,
&cmd_show_hooks_entry,
&cmd_show_messages_entry,
&cmd_show_options_entry,
&cmd_show_prompt_history_entry,
&cmd_show_window_options_entry,
&cmd_source_file_entry,
&cmd_split_window_entry,
&cmd_start_server_entry,
&cmd_suspend_client_entry,
&cmd_swap_pane_entry,
&cmd_swap_window_entry,
&cmd_switch_client_entry,
&cmd_unbind_key_entry,
&cmd_unlink_window_entry,
&cmd_wait_for_entry,
NULL
};
/* Instance of a command. */
struct cmd {
const struct cmd_entry *entry;
struct args *args;
u_int group;
char *file;
u_int line;
int parse_flags;
TAILQ_ENTRY(cmd) qentry;
};
TAILQ_HEAD(cmds, cmd);
/* Next group number for new command list. */
static u_int cmd_list_next_group = 1;
/* Log an argument vector. */
void printflike(3, 4)
cmd_log_argv(int argc, char **argv, const char *fmt, ...)
{
char *prefix;
va_list ap;
int i;
va_start(ap, fmt);
xvasprintf(&prefix, fmt, ap);
va_end(ap);
for (i = 0; i < argc; i++)
log_debug("%s: argv[%d]=%s", prefix, i, argv[i]);
free(prefix);
}
/* Prepend to an argument vector. */
void
cmd_prepend_argv(int *argc, char ***argv, const char *arg)
{
char **new_argv;
int i;
new_argv = xreallocarray(NULL, (*argc) + 1, sizeof *new_argv);
new_argv[0] = xstrdup(arg);
for (i = 0; i < *argc; i++)
new_argv[1 + i] = (*argv)[i];
free(*argv);
*argv = new_argv;
(*argc)++;
}
/* Append to an argument vector. */
void
cmd_append_argv(int *argc, char ***argv, const char *arg)
{
*argv = xreallocarray(*argv, (*argc) + 1, sizeof **argv);
(*argv)[(*argc)++] = xstrdup(arg);
}
/* Pack an argument vector up into a buffer. */
int
cmd_pack_argv(int argc, char **argv, char *buf, size_t len)
{
size_t arglen;
int i;
if (argc == 0)
return (0);
cmd_log_argv(argc, argv, "%s", __func__);
*buf = '\0';
for (i = 0; i < argc; i++) {
if (strlcpy(buf, argv[i], len) >= len)
return (-1);
arglen = strlen(argv[i]) + 1;
buf += arglen;
len -= arglen;
}
return (0);
}
/* Unpack an argument vector from a packed buffer. */
int
cmd_unpack_argv(char *buf, size_t len, int argc, char ***argv)
{
int i;
size_t arglen;
if (argc == 0)
return (0);
*argv = xcalloc(argc, sizeof **argv);
buf[len - 1] = '\0';
for (i = 0; i < argc; i++) {
if (len == 0) {
cmd_free_argv(argc, *argv);
return (-1);
}
arglen = strlen(buf) + 1;
(*argv)[i] = xstrdup(buf);
buf += arglen;
len -= arglen;
}
cmd_log_argv(argc, *argv, "%s", __func__);
return (0);
}
/* Copy an argument vector, ensuring it is terminated by NULL. */
char **
cmd_copy_argv(int argc, char **argv)
{
char **new_argv;
int i;
if (argc == 0)
return (NULL);
new_argv = xcalloc(argc + 1, sizeof *new_argv);
for (i = 0; i < argc; i++) {
if (argv[i] != NULL)
new_argv[i] = xstrdup(argv[i]);
}
return (new_argv);
}
/* Free an argument vector. */
void
cmd_free_argv(int argc, char **argv)
{
int i;
if (argc == 0)
return;
for (i = 0; i < argc; i++)
free(argv[i]);
free(argv);
}
/* Convert argument vector to a string. */
char *
cmd_stringify_argv(int argc, char **argv)
{
char *buf = NULL, *s;
size_t len = 0;
int i;
if (argc == 0)
return (xstrdup(""));
for (i = 0; i < argc; i++) {
s = args_escape(argv[i]);
log_debug("%s: %u %s = %s", __func__, i, argv[i], s);
len += strlen(s) + 1;
buf = xrealloc(buf, len);
if (i == 0)
*buf = '\0';
else
strlcat(buf, " ", len);
strlcat(buf, s, len);
free(s);
}
return (buf);
}
/* Get entry for command. */
const struct cmd_entry *
cmd_get_entry(struct cmd *cmd)
{
return (cmd->entry);
}
/* Get arguments for command. */
struct args *
cmd_get_args(struct cmd *cmd)
{
return (cmd->args);
}
/* Get group for command. */
u_int
cmd_get_group(struct cmd *cmd)
{
return (cmd->group);
}
/* Get file and line for command. */
void
cmd_get_source(struct cmd *cmd, const char **file, u_int *line)
{
if (file != NULL)
*file = cmd->file;
if (line != NULL)
*line = cmd->line;
}
/* Get parse flags for command. */
int
cmd_get_parse_flags(struct cmd *cmd)
{
return (cmd->parse_flags);
}
/* Look for an alias for a command. */
char *
cmd_get_alias(const char *name)
{
struct options_entry *o;
struct options_array_item *a;
union options_value *ov;
size_t wanted, n;
const char *equals;
o = options_get_only(global_options, "command-alias");
if (o == NULL)
return (NULL);
wanted = strlen(name);
a = options_array_first(o);
while (a != NULL) {
ov = options_array_item_value(a);
equals = strchr(ov->string, '=');
if (equals != NULL) {
n = equals - ov->string;
if (n == wanted && strncmp(name, ov->string, n) == 0)
return (xstrdup(equals + 1));
}
a = options_array_next(a);
}
return (NULL);
}
/* Look up a command entry by name. */
const struct cmd_entry *
cmd_find(const char *name, char **cause)
{
const struct cmd_entry **loop, *entry, *found = NULL;
int ambiguous;
char s[8192];
ambiguous = 0;
for (loop = cmd_table; *loop != NULL; loop++) {
entry = *loop;
if (entry->alias != NULL && strcmp(entry->alias, name) == 0) {
ambiguous = 0;
found = entry;
break;
}
if (strncmp(entry->name, name, strlen(name)) != 0)
continue;
if (found != NULL)
ambiguous = 1;
found = entry;
if (strcmp(entry->name, name) == 0)
break;
}
if (ambiguous)
goto ambiguous;
if (found == NULL) {
xasprintf(cause, "unknown command: %s", name);
return (NULL);
}
return (found);
ambiguous:
*s = '\0';
for (loop = cmd_table; *loop != NULL; loop++) {
entry = *loop;
if (strncmp(entry->name, name, strlen(name)) != 0)
continue;
if (strlcat(s, entry->name, sizeof s) >= sizeof s)
break;
if (strlcat(s, ", ", sizeof s) >= sizeof s)
break;
}
s[strlen(s) - 2] = '\0';
xasprintf(cause, "ambiguous command: %s, could be: %s", name, s);
return (NULL);
}
/* Parse a single command from an argument vector. */
struct cmd *
cmd_parse(struct args_value *values, u_int count, const char *file, u_int line,
int parse_flags, char **cause)
{
const struct cmd_entry *entry;
struct cmd *cmd;
struct args *args;
char *error = NULL;
if (count == 0 || values[0].type != ARGS_STRING) {
xasprintf(cause, "no command");
return (NULL);
}
entry = cmd_find(values[0].string, cause);
if (entry == NULL)
return (NULL);
args = args_parse(&entry->args, values, count, &error);
if (args == NULL && error == NULL) {
xasprintf(cause, "usage: %s %s", entry->name, entry->usage);
return (NULL);
}
if (args == NULL) {
xasprintf(cause, "command %s: %s", entry->name, error);
free(error);
return (NULL);
}
cmd = xcalloc(1, sizeof *cmd);
cmd->entry = entry;
cmd->args = args;
cmd->parse_flags = parse_flags;
if (file != NULL)
cmd->file = xstrdup(file);
cmd->line = line;
return (cmd);
}
/* Free a command. */
void
cmd_free(struct cmd *cmd)
{
free(cmd->file);
args_free(cmd->args);
free(cmd);
}
/* Copy a command. */
struct cmd *
cmd_copy(struct cmd *cmd, int argc, char **argv)
{
struct cmd *new_cmd;
new_cmd = xcalloc(1, sizeof *new_cmd);
new_cmd->entry = cmd->entry;
new_cmd->args = args_copy(cmd->args, argc, argv);
if (cmd->file != NULL)
new_cmd->file = xstrdup(cmd->file);
new_cmd->line = cmd->line;
return (new_cmd);
}
/* Get a command as a string. */
char *
cmd_print(struct cmd *cmd)
{
char *out, *s;
s = args_print(cmd->args);
if (*s != '\0')
xasprintf(&out, "%s %s", cmd->entry->name, s);
else
out = xstrdup(cmd->entry->name);
free(s);
return (out);
}
/* Create a new command list. */
struct cmd_list *
cmd_list_new(void)
{
struct cmd_list *cmdlist;
cmdlist = xcalloc(1, sizeof *cmdlist);
cmdlist->references = 1;
cmdlist->group = cmd_list_next_group++;
cmdlist->list = xcalloc(1, sizeof *cmdlist->list);
TAILQ_INIT(cmdlist->list);
return (cmdlist);
}
/* Append a command to a command list. */
void
cmd_list_append(struct cmd_list *cmdlist, struct cmd *cmd)
{
cmd->group = cmdlist->group;
TAILQ_INSERT_TAIL(cmdlist->list, cmd, qentry);
}
/* Append all commands from one list to another. */
void
cmd_list_append_all(struct cmd_list *cmdlist, struct cmd_list *from)
{
struct cmd *cmd;
TAILQ_FOREACH(cmd, from->list, qentry)
cmd->group = cmdlist->group;
TAILQ_CONCAT(cmdlist->list, from->list, qentry);
}
/* Move all commands from one command list to another. */
void
cmd_list_move(struct cmd_list *cmdlist, struct cmd_list *from)
{
TAILQ_CONCAT(cmdlist->list, from->list, qentry);
cmdlist->group = cmd_list_next_group++;
}
/* Free a command list. */
void
cmd_list_free(struct cmd_list *cmdlist)
{
struct cmd *cmd, *cmd1;
if (--cmdlist->references != 0)
return;
TAILQ_FOREACH_SAFE(cmd, cmdlist->list, qentry, cmd1) {
TAILQ_REMOVE(cmdlist->list, cmd, qentry);
cmd_free(cmd);
}
free(cmdlist->list);
free(cmdlist);
}
/* Copy a command list, expanding %s in arguments. */
struct cmd_list *
cmd_list_copy(const struct cmd_list *cmdlist, int argc, char **argv)
{
struct cmd *cmd;
struct cmd_list *new_cmdlist;
struct cmd *new_cmd;
u_int group = cmdlist->group;
char *s;
s = cmd_list_print(cmdlist, 0);
log_debug("%s: %s", __func__, s);
free(s);
new_cmdlist = cmd_list_new();
TAILQ_FOREACH(cmd, cmdlist->list, qentry) {
if (cmd->group != group) {
new_cmdlist->group = cmd_list_next_group++;
group = cmd->group;
}
new_cmd = cmd_copy(cmd, argc, argv);
cmd_list_append(new_cmdlist, new_cmd);
}
s = cmd_list_print(new_cmdlist, 0);
log_debug("%s: %s", __func__, s);
free(s);
return (new_cmdlist);
}
/* Get a command list as a string. */
char *
cmd_list_print(const struct cmd_list *cmdlist, int flags)
{
struct cmd *cmd, *next;
char *buf, *this;
size_t len;
const char *separator;
int escaped = flags & CMD_LIST_PRINT_ESCAPED;
int no_groups = flags & CMD_LIST_PRINT_NO_GROUPS;
const char *single_separator = escaped ? " \\; " : " ; ";
const char *double_separator = escaped ? " \\;\\; " : " ;; ";
len = 1;
buf = xcalloc(1, len);
TAILQ_FOREACH(cmd, cmdlist->list, qentry) {
this = cmd_print(cmd);
len += strlen(this) + 6;
buf = xrealloc(buf, len);
strlcat(buf, this, len);
next = TAILQ_NEXT(cmd, qentry);
if (next != NULL) {
if (!no_groups && cmd->group != next->group)
separator = double_separator;
else
separator = single_separator;
strlcat(buf, separator, len);
}
free(this);
}
return (buf);
}
/* Get first command in list. */
struct cmd *
cmd_list_first(struct cmd_list *cmdlist)
{
return (TAILQ_FIRST(cmdlist->list));
}
/* Get next command in list. */
struct cmd *
cmd_list_next(struct cmd *cmd)
{
return (TAILQ_NEXT(cmd, qentry));
}
/* Do all of the commands in this command list have this flag? */
int
cmd_list_all_have(struct cmd_list *cmdlist, int flag)
{
struct cmd *cmd;
TAILQ_FOREACH(cmd, cmdlist->list, qentry) {
if (~cmd->entry->flags & flag)
return (0);
}
return (1);
}
/* Do any of the commands in this command list have this flag? */
int
cmd_list_any_have(struct cmd_list *cmdlist, int flag)
{
struct cmd *cmd;
TAILQ_FOREACH(cmd, cmdlist->list, qentry) {
if (cmd->entry->flags & flag)
return (1);
}
return (0);
}
/* Adjust current mouse position for a pane. */
int
cmd_mouse_at(struct window_pane *wp, struct mouse_event *m, u_int *xp,
u_int *yp, int last)
{
u_int x, y;
if (last) {
x = m->lx + m->ox;
y = m->ly + m->oy;
} else {
x = m->x + m->ox;
y = m->y + m->oy;
}
log_debug("%s: x=%u, y=%u%s", __func__, x, y, last ? " (last)" : "");
if (m->statusat == 0 && y >= m->statuslines)
y -= m->statuslines;
if (x < wp->xoff || x >= wp->xoff + wp->sx)
return (-1);
if (y < wp->yoff || y >= wp->yoff + wp->sy)
return (-1);
if (xp != NULL)
*xp = x - wp->xoff;
if (yp != NULL)
*yp = y - wp->yoff;
return (0);
}
/* Get current mouse window if any. */
struct winlink *
cmd_mouse_window(struct mouse_event *m, struct session **sp)
{
struct session *s;
struct window *w;
struct winlink *wl;
if (!m->valid)
return (NULL);
if (m->s == -1 || (s = session_find_by_id(m->s)) == NULL)
return (NULL);
if (m->w == -1)
wl = s->curw;
else {
if ((w = window_find_by_id(m->w)) == NULL)
return (NULL);
wl = winlink_find_by_window(&s->windows, w);
}
if (sp != NULL)
*sp = s;
return (wl);
}
/* Get current mouse pane if any. */
struct window_pane *
cmd_mouse_pane(struct mouse_event *m, struct session **sp,
struct winlink **wlp)
{
struct winlink *wl;
struct window_pane *wp;
if ((wl = cmd_mouse_window(m, sp)) == NULL)
return (NULL);
if (m->wp == -1)
wp = wl->window->active;
else {
if ((wp = window_pane_find_by_id(m->wp)) == NULL)
return (NULL);
if (!window_has_pane(wl->window, wp))
return (NULL);
}
if (wlp != NULL)
*wlp = wl;
return (wp);
}
/* Replace the first %% or %idx in template by s. */
char *
cmd_template_replace(const char *template, const char *s, int idx)
{
char ch, *buf;
const char *ptr, *cp, quote[] = "\"\\$;~";
int replaced, quoted;
size_t len;
if (strchr(template, '%') == NULL)
return (xstrdup(template));
buf = xmalloc(1);
*buf = '\0';
len = 0;
replaced = 0;
ptr = template;
while (*ptr != '\0') {
switch (ch = *ptr++) {
case '%':
if (*ptr < '1' || *ptr > '9' || *ptr - '0' != idx) {
if (*ptr != '%' || replaced)
break;
replaced = 1;
}
ptr++;
quoted = (*ptr == '%');
if (quoted)
ptr++;
buf = xrealloc(buf, len + (strlen(s) * 3) + 1);
for (cp = s; *cp != '\0'; cp++) {
if (quoted && strchr(quote, *cp) != NULL)
buf[len++] = '\\';
buf[len++] = *cp;
}
buf[len] = '\0';
continue;
}
buf = xrealloc(buf, len + 2);
buf[len++] = ch;
buf[len] = '\0';
}
return (buf);
}