3 * $Id: exec.c,v 1.7 2003/01/24 20:12:26 mdw Exp $
5 * Source and target for executable programs
7 * (c) 1999 Straylight/Edgeware
10 /*----- Licensing notice --------------------------------------------------*
12 * This file is part of the `fw' port forwarder.
14 * `fw' is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
19 * `fw' is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
24 * You should have received a copy of the GNU General Public License
25 * along with `fw'; if not, write to the Free Software Foundation,
26 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
29 /*----- Revision history --------------------------------------------------*
32 * Revision 1.7 2003/01/24 20:12:26 mdw
33 * Correctly cast uid and gid sentinel values. Parse full filenames in
34 * exec arguments (can't do it for program, unfortunately, since the die is
37 * Revision 1.6 2002/02/22 23:43:32 mdw
38 * Call @xfree@ rather than @free@.
40 * Revision 1.5 2002/01/13 14:49:03 mdw
41 * Track @lbuf@ changes in mLib.
43 * Revision 1.4 2001/02/03 20:30:03 mdw
44 * Support re-reading config files on SIGHUP.
46 * Revision 1.3 2000/07/01 11:28:52 mdw
47 * Use new mLib selbuf features.
49 * Revision 1.2 1999/10/22 22:46:17 mdw
50 * When a non-file endpoint is attached to a file, keep the file endpoint
51 * open until the nonfile is done. This stops socket sources from
52 * resetting their connection limits too early.
54 * Revision 1.1 1999/07/26 23:33:32 mdw
55 * New sources and targets.
59 /*----- Header files ------------------------------------------------------*/
72 #include <sys/types.h>
79 # include <sys/resource.h>
83 extern char **environ
;
91 #include <mLib/alloc.h>
92 #include <mLib/dstr.h>
94 #include <mLib/fdflags.h>
95 #include <mLib/report.h>
97 #include <mLib/selbuf.h>
100 #include <mLib/sym.h>
112 /*----- Data structures ---------------------------------------------------*/
114 /* --- Resource usage --- */
116 #ifdef HAVE_SETRLIMIT
118 typedef struct xlimit
{
119 #define R(r, n) struct rlimit n;
125 /* --- Environment variable modifications --- */
127 typedef struct xenv
{
137 /* --- Program options --- */
139 typedef struct xopts
{
148 #ifdef HAVE_SETRLIMIT
155 /* --- Executable program arguments --- */
157 typedef struct xargs
{
163 #define XARGS_SZ(n) (sizeof(xargs) + sizeof(char *) * (n))
165 /* --- Executable endpoints --- */
167 typedef struct xept
{
169 struct xept
*next
, *prev
;
179 #define XEF_CLOSE 16u
182 /* --- Executable program data --- */
184 typedef struct xdata
{
189 /* --- Executable source block --- */
191 typedef struct xsource
{
196 /* --- Executable target block --- */
198 typedef struct xtarget
{
203 /*----- Static variables --------------------------------------------------*/
205 static xopts exec_opts
= { 1, 0, 0, 0, -1, -1, 0, &exec_opts
.env
};
206 static xept
*xept_list
;
208 static sym_table env
;
210 /*----- Fiddling about with resource limits -------------------------------*/
212 #ifdef HAVE_SETRLIMIT
214 /* --- Table mapping user-level names to OS interface bits --- */
216 typedef struct rlimit_ent
{
223 static rlimit_ent rlimits
[] = {
224 #define R(r, n) { #n, #r, r, offsetof(xlimit, n) },
229 #define RLIMIT(xl, o) ((struct rlimit *)((char *)(xl) + (o)))
231 /* --- @rlimit_get@ --- *
233 * Arguments: @xlimit *xl@ = pointer to limit structure
237 * Use: Initializes a limit structure from the current limits.
240 static void rlimit_get(xlimit
*xl
)
244 for (r
= rlimits
; r
->name
; r
++) {
245 if (getrlimit(r
->r
, RLIMIT(xl
, r
->off
))) {
246 moan("couldn't read %s: %s", r
->rname
, strerror(errno
));
252 /* --- @rlimit_set@ --- *
254 * Arguments: @xlimit *xl@ = pointer to limit structure
258 * Use: Sets resource limits from the supplied limits structure.
261 static void rlimit_set(xlimit
*xl
)
265 for (r
= rlimits
; r
->name
; r
++) {
266 if (setrlimit(r
->r
, RLIMIT(xl
, r
->off
))) {
267 moan("couldn't set %s: %s", r
->rname
, strerror(errno
));
273 /* --- @rlimit_option@ --- */
275 static int rlimit_option(xlimit
*xl
, scanner
*sc
)
277 CONF_BEGIN(sc
, "rlimit", "resource limit")
278 enum { w_soft
, w_hard
, w_both
} which
= w_both
;
283 /* --- Find out which resource is being fiddled --- */
289 for (r
= rlimits
; r
->name
; r
++) {
290 if (strncmp(sc
->d
.buf
, r
->name
, sc
->d
.len
) == 0) {
291 if (r
->name
[sc
->d
.len
] == 0) {
295 error(sc
, "ambiguous resource limit name `%s'", sc
->d
.buf
);
303 rl
= RLIMIT(xl
, chosen
->off
);
306 /* --- Look for hard or soft restrictions --- */
312 if (sc
->t
== CTOK_WORD
) {
313 if ((i
= conf_enum(sc
, "soft,hard",
314 ENUM_ABBREV
| ENUM_NONE
, "limit type")) != -1)
319 /* --- Now read the new value --- */
323 if (sc
->t
!= CTOK_WORD
)
324 error(sc
, "parse error, expected limit value");
326 if (conf_enum(sc
, "unlimited,infinity",
327 ENUM_ABBREV
| ENUM_NONE
, "limit value") > -1)
332 v
= strtol(sc
->d
.buf
, &p
, 0);
334 error(sc
, "parse error, invalid limit value `%s'", sc
->d
.buf
);
335 switch (tolower((unsigned char)*p
)) {
337 case 'b': v
*= 512; break;
340 case 'k': v
*= 1024; break;
341 default: error(sc
, "parse error, invalid limit scale `%c'", *p
);
346 /* --- Store the limit value away --- */
354 if (v
> rl
->rlim_max
)
355 error(sc
, "soft limit %l exceeds hard limit %l for %s",
356 v
, rl
->rlim_max
, chosen
->rname
);
361 if (rl
->rlim_cur
> v
)
372 /*----- Environment fiddling ----------------------------------------------*/
374 /* --- @xenv_option@ --- *
376 * Arguments: @xopts *xo@ = pointer to options block
377 * @scanner *sc@ = pointer to scanner
379 * Returns: Nonzero if claimed
381 * Use: Parses environment variable assignments.
384 static int xenv_option(xopts
*xo
, scanner
*sc
)
386 CONF_BEGIN(sc
, "env", "environment")
389 /* --- Unset a variable --- */
391 if (strcmp(sc
->d
.buf
, "unset") == 0) {
393 if (sc
->t
!= CTOK_WORD
)
394 error(sc
, "parse error, expected environment variable name");
396 xe
->name
= xstrdup(sc
->d
.buf
);
403 /* --- Clear the entire environment --- */
405 if (strcmp(sc
->d
.buf
, "clear") == 0) {
412 /* --- Allow `set' to be omitted if there's a prefix --- */
414 if (strcmp(sc
->d
.buf
, "set") == 0)
419 /* --- Set a variable --- */
421 if (sc
->t
!= CTOK_WORD
)
422 error(sc
, "parse error, expected environment variable name");
424 xe
->name
= xstrdup(sc
->d
.buf
);
428 if (sc
->t
!= CTOK_WORD
)
429 error(sc
, "parse error, expected environment variable value");
430 xe
->value
= xstrdup(sc
->d
.buf
);
438 xo
->etail
= &xe
->next
;
441 /* --- Nothing else to try --- */
446 /* --- @xenv_apply@ --- *
448 * Arguments: @xenv *xe@ = pointer to a variable change list
452 * Use: Modifies the environment (in @env@) according to the list.
455 static void xenv_apply(xenv
*xe
)
460 env_put(&env
, xe
->name
, xe
->value
);
471 /* --- @xenv_destroy@ --- *
473 * Arguments: @xenv *xe@ = pointer to a variable change list
477 * Use: Frees the memory used by an environment variable change list.
480 static void xenv_destroy(xenv
*xe
)
492 /*----- Miscellaneous good things -----------------------------------------*/
494 /* --- @x_tidy@ --- *
496 * Arguments: @xargs *xa@ = pointer to an arguments block
497 * @xopts *xo@ = pointer to an options block
501 * Use: Releases a reference to argument and options blocks.
504 static void x_tidy(xargs
*xa
, xopts
*xo
)
512 xenv_destroy(xo
->env
);
517 /*----- Executable endpoints ----------------------------------------------*/
519 /* --- @attach@ --- */
521 static void xept_error(char */
*p*/
, size_t /*len*/, void */
*v*/
);
523 static void xept_attach(endpt
*e
, reffd
*in
, reffd
*out
)
525 xept
*xe
= (xept
*)e
;
529 /* --- Make a pipe for standard error --- */
532 fw_log(-1, "[%s] couldn't create pipe: %s", xe
->desc
, strerror(errno
));
535 fdflags(fd
[0], O_NONBLOCK
, O_NONBLOCK
, FD_CLOEXEC
, FD_CLOEXEC
);
537 /* --- Fork a child, and handle an error if there was one --- */
539 if ((kid
= fork()) == -1) {
540 fw_log(-1, "[%s] couldn't fork: %s", xe
->desc
, strerror(errno
));
546 /* --- Do the child thing --- */
551 /* --- Fiddle with the file descriptors --- *
553 * Attach the other endpoint's descriptors to standard input and output.
554 * Attach my pipe to standard error. Mark everything as blocking and
555 * not-to-be-closed-on-exec at this end.
559 if (dup2(in
->fd
, STDIN_FILENO
) < 0 ||
560 dup2(out
->fd
, STDOUT_FILENO
) < 0 ||
561 dup2(fd
[1], STDERR_FILENO
) < 0) {
562 moan("couldn't manipulate file descriptors: %s", strerror(errno
));
571 fdflags(STDIN_FILENO
, O_NONBLOCK
, 0, FD_CLOEXEC
, 0);
572 fdflags(STDOUT_FILENO
, O_NONBLOCK
, 0, FD_CLOEXEC
, 0);
573 fdflags(STDERR_FILENO
, O_NONBLOCK
, 0, FD_CLOEXEC
, 0);
575 /* --- First of all set the @chroot@ prison --- */
577 if (xo
->root
&& chroot(xo
->root
)) {
578 moan("couldn't set `%s' as filesystem root: %s",
579 xo
->root
, strerror(errno
));
583 /* --- Now set the current directory --- */
585 if (xo
->dir ?
chdir(xo
->dir
) : xo
->root ?
chdir("/") : 0) {
586 moan("couldn't set `%s' as current directory: %s",
587 xo
->dir ? xo
->dir
: "/", strerror(errno
));
591 /* --- Set the resource limits --- */
593 #ifdef HAVE_SETRLIMIT
597 /* --- Set group id --- */
599 if (xo
->gid
!= (gid_t
)-1) {
600 if (setgid(xo
->gid
)) {
601 moan("couldn't set gid %i: %s", xo
->gid
, strerror(errno
));
604 #ifdef HAVE_SETGROUPS
605 if (setgroups(1, &xo
->gid
))
606 moan("warning: couldn't set group list to %i: %s", xo
->gid
,
611 /* --- Set uid --- */
613 if (xo
->uid
!= (uid_t
)-1) {
614 if (setuid(xo
->uid
)) {
615 moan("couldn't set uid %i: %s", xo
->uid
, strerror(errno
));
620 /* --- Play with signal dispositions --- */
622 signal(SIGPIPE
, SIG_DFL
);
624 /* --- Fiddle with the environment --- */
626 xenv_apply(exec_opts
.env
);
627 xenv_apply(xe
->xo
->env
);
628 environ
= env_export(&env
);
630 /* --- Run the program --- */
632 execvp(xe
->xa
->file
, xe
->xa
->argv
);
633 moan("couldn't execute `%s': %s", xe
->xa
->file
, strerror(errno
));
637 /* --- The child's done; see to the parent --- */
640 selbuf_init(&xe
->err
, sel
, fd
[0], xept_error
, xe
);
642 xe
->next
= xept_list
;
645 xept_list
->prev
= xe
;
647 if (!(xe
->xo
->f
& XF_NOLOG
))
648 fw_log(-1, "[%s] started with pid %i", xe
->desc
, kid
);
653 /* --- @xept_file@ --- */
655 static void xept_file(endpt
*e
, endpt
*f
)
657 xept
*xe
= (xept
*)e
;
661 /* --- @xept_close@ --- */
663 static void xept_close(endpt
*e
)
665 xept
*xe
= (xept
*)e
;
668 xe
->f
->ops
->close(xe
->f
);
669 x_tidy(xe
->xa
, xe
->xo
);
675 /* --- @xept_destroy@ --- */
677 static void xept_destroy(xept
*xe
)
679 /* --- First emit the news about the process --- */
681 if (xe
->xo
->f
& XF_NOLOG
)
683 else if (WIFEXITED(xe
->st
)) {
684 if (WEXITSTATUS(xe
->st
) == 0)
685 fw_log(-1, "[%s] pid %i exited successfully", xe
->desc
, xe
->kid
);
687 fw_log(-1, "[%s] pid %i failed: status %i",
688 xe
->desc
, xe
->kid
, WEXITSTATUS(xe
->st
));
690 } else if (WIFSIGNALED(xe
->st
)) {
692 #ifdef HAVE_STRSIGNAL
693 s
= strsignal(WTERMSIG(xe
->st
));
694 #elif HAVE__SYS_SIGLIST
695 s
= _sys_siglist
[WTERMSIG(xe
->st
)];
698 sprintf(buf
, "signal %i", WTERMSIG(xe
->st
));
701 fw_log(-1, "[%s] pid %i failed: %s", xe
->desc
, xe
->kid
, s
);
703 fw_log(-1, "[%s] pid %i failed: unrecognized status", xe
->desc
, xe
->kid
);
705 /* --- Free up the parent-side resources --- */
708 xe
->next
->prev
= xe
->prev
;
710 xe
->prev
->next
= xe
->next
;
712 xept_list
= xe
->next
;
716 xe
->f
->ops
->close(xe
->f
);
717 x_tidy(xe
->xa
, xe
->xo
);
722 /* --- @xept_chld@ --- *
724 * Arguments: @int n@ = signal number
725 * @void *p@ = uninteresting pointer
729 * Use: Deals with child death situations.
732 static void xept_chld(int n
, void *p
)
737 while ((kid
= waitpid(-1, &st
, WNOHANG
)) > 0) {
738 xept
*xe
= xept_list
;
742 if (kid
== xxe
->kid
) {
744 xxe
->e
.f
|= XEF_EXIT
;
745 if (xxe
->e
.f
& XEF_CLOSE
)
753 /* --- @xept_error@ --- *
755 * Arguments: @char *p@ = pointer to string read from stderr
756 * @size_t len@ = length of the string
757 * @void *v@ = pointer to by endpoint
761 * Use: Handles error reports from a child process.
764 static void xept_error(char *p
, size_t len
, void *v
)
768 fw_log(-1, "[%s] pid %i: %s", xe
->desc
, xe
->kid
, p
);
770 close(xe
->err
.reader
.fd
);
771 selbuf_destroy(&xe
->err
);
772 xe
->e
.f
|= XEF_CLOSE
;
773 if (xe
->e
.f
& XEF_EXIT
)
778 /* --- Endpoint operations --- */
780 static endpt_ops xept_ops
= { xept_attach
, xept_file
, 0, xept_close
};
782 /*----- General operations on sources and targets -------------------------*/
784 /* --- @exec_init@ --- *
790 * Use: Initializes the executable problem source and target.
795 #ifdef HAVE_SETRLIMIT
796 rlimit_get(&exec_opts
.xl
);
798 sig_add(&xept_sig
, SIGCHLD
, xept_chld
, 0);
800 env_import(&env
, environ
);
803 /* --- @exec_option@ --- */
805 static int exec_option(xdata
*x
, scanner
*sc
)
807 xopts
*xo
= x ? x
->xo
: &exec_opts
;
809 CONF_BEGIN(sc
, "exec", "executable");
811 /* --- Logging settings --- */
813 if (strcmp(sc
->d
.buf
, "logging") == 0 ||
814 strcmp(sc
->d
.buf
, "log") == 0) {
818 if (conf_enum(sc
, "no,yes", ENUM_ABBREV
, "logging status"))
825 /* --- Current directory setting --- *
827 * Lots of possibilities to guard against possible brainoes.
830 if (strcmp(sc
->d
.buf
, "dir") == 0 ||
831 strcmp(sc
->d
.buf
, "cd") == 0 ||
832 strcmp(sc
->d
.buf
, "chdir") == 0 ||
833 strcmp(sc
->d
.buf
, "cwd") == 0) {
838 conf_name(sc
, '/', &d
);
839 xo
->dir
= xstrdup(d
.buf
);
844 /* --- Set a chroot prison --- */
846 if (strcmp(sc
->d
.buf
, "root") == 0 ||
847 strcmp(sc
->d
.buf
, "chroot") == 0) {
852 conf_name(sc
, '/', &d
);
853 xo
->root
= xstrdup(d
.buf
);
858 /* --- Set the target user id --- */
860 if (strcmp(sc
->d
.buf
, "uid") == 0 ||
861 strcmp(sc
->d
.buf
, "user") == 0) {
865 if (sc
->t
!= CTOK_WORD
)
866 error(sc
, "parse error, expected user name or uid");
867 if (isdigit((unsigned char)*sc
->d
.buf
))
868 xo
->uid
= atoi(sc
->d
.buf
);
870 struct passwd
*pw
= getpwnam(sc
->d
.buf
);
872 error(sc
, "unknown user name `%s'", sc
->d
.buf
);
873 xo
->uid
= pw
->pw_uid
;
879 /* --- Set the target group id --- */
881 if (strcmp(sc
->d
.buf
, "gid") == 0 ||
882 strcmp(sc
->d
.buf
, "group") == 0) {
886 if (sc
->t
!= CTOK_WORD
)
887 error(sc
, "parse error, expected group name or gid");
888 if (isdigit((unsigned char)*sc
->d
.buf
))
889 xo
->gid
= atoi(sc
->d
.buf
);
891 struct group
*gr
= getgrnam(sc
->d
.buf
);
893 error(sc
, "unknown user name `%s'", sc
->d
.buf
);
894 xo
->gid
= gr
->gr_gid
;
900 /* --- Now try resource limit settings --- */
902 #ifdef HAVE_SETRLIMIT
903 if (rlimit_option(&xo
->xl
, sc
))
907 /* --- And then environment settings --- */
909 if (xenv_option(xo
, sc
))
912 /* --- Nothing found --- */
917 /* --- @exec_desc@ --- */
919 static void exec_desc(xdata
*x
, dstr
*d
)
923 dstr_puts(d
, "exec ");
924 if (strcmp(x
->xa
->file
, x
->xa
->argv
[0]) != 0) {
925 dstr_puts(d
, x
->xa
->file
);
928 for (p
= x
->xa
->argv
; *p
; p
++) {
937 /* --- @exec_read@ --- */
939 static void exec_read(xdata
*x
, scanner
*sc
)
945 /* --- Read the first word --- *
947 * This is either a shell command or the actual program to run.
950 if (sc
->t
== CTOK_WORD
) {
951 dstr_putd(&d
, &sc
->d
); d
.len
++;
956 /* --- See if there's a list of arguments --- *
958 * If not, then the thing I saw was a shell command, so build the proper
959 * arguments for that.
965 error(sc
, "parse error, expected shell command or argument list");
966 xa
= xmalloc(XARGS_SZ(3) + 8 + 3 + d
.len
);
967 p
= (char *)(xa
->argv
+ 4);
970 xa
->argv
[0] = p
; memcpy(p
, "/bin/sh", 8); p
+= 8;
971 xa
->argv
[1] = p
; memcpy(p
, "-c", 3); p
+= 3;
972 xa
->argv
[2] = p
; memcpy(p
, d
.buf
, d
.len
); p
+= d
.len
;
976 /* --- Snarf in a list of arguments --- */
983 /* --- Strip off the leading `[' --- *
985 * Allow various handy filename characters to be entered without quoting.
988 conf_undelim(sc
, "=:/.", "=:/.");
991 /* --- Read a sequence of arguments --- */
993 while (sc
->t
== CTOK_WORD
) {
994 dstr_putd(&d
, &sc
->d
); d
.len
++;
998 conf_undelim(sc
, 0, 0);
1000 /* --- Expect the closing `]' --- */
1003 error(sc
, "parse error, missing `]'");
1006 /* --- If there are no arguments, whinge --- */
1009 error(sc
, "must specify at least one argument");
1011 /* --- Allocate a lump of memory for the array --- */
1013 xa
= xmalloc(XARGS_SZ(argc
) + d
.len
);
1016 p
= (char *)(v
+ argc
+ 1);
1017 memcpy(p
, d
.buf
, d
.len
);
1022 /* --- Start dumping addresses into the @argv@ array --- */
1026 while (*p
++ && p
< q
)
1034 /* --- Do some other setting up --- */
1038 x
->xo
= CREATE(xopts
);
1044 /* --- @exec_endpt@ --- */
1046 static endpt
*exec_endpt(xdata
*x
, const char *desc
)
1048 xept
*xe
= CREATE(xept
);
1049 xe
->e
.ops
= &xept_ops
;
1053 xe
->xa
= x
->xa
; xe
->xa
->ref
++;
1054 xe
->xo
= x
->xo
; xe
->xo
->ref
++;
1057 xe
->desc
= xstrdup(desc
);
1061 /* --- @exec_destroy@ --- */
1063 static void exec_destroy(xdata
*x
)
1065 x_tidy(x
->xa
, x
->xo
);
1068 /*----- Source definition -------------------------------------------------*/
1070 /* --- @option@ --- */
1072 static int xsource_option(source
*s
, scanner
*sc
)
1074 xsource
*xs
= (xsource
*)s
;
1075 return (exec_option(xs ?
&xs
->x
: 0, sc
));
1078 /* --- @read@ --- */
1080 static source
*xsource_read(scanner
*sc
)
1084 if (!conf_prefix(sc
, "exec"))
1086 xs
= CREATE(xsource
);
1087 xs
->s
.ops
= &xsource_ops
;
1089 exec_read(&xs
->x
, sc
);
1093 /* --- @attach@ --- */
1095 static void xsource_destroy(source */
*s*/
);
1097 static void xsource_attach(source
*s
, scanner
*sc
, target
*t
)
1099 xsource
*xs
= (xsource
*)s
;
1102 /* --- Set up the source description string --- */
1106 exec_desc(&xs
->x
, &d
);
1107 dstr_puts(&d
, " -> ");
1108 dstr_puts(&d
, t
->desc
);
1109 xs
->s
.desc
= xstrdup(d
.buf
);
1113 /* --- Create the endpoints --- */
1115 if ((ee
= t
->ops
->create(t
, xs
->s
.desc
)) == 0)
1117 if ((e
= exec_endpt(&xs
->x
, xs
->s
.desc
)) == 0) {
1123 /* --- Dispose of source and target --- */
1127 xsource_destroy(&xs
->s
);
1130 /* --- @destroy@ --- */
1132 static void xsource_destroy(source
*s
)
1134 xsource
*xs
= (xsource
*)s
;
1136 exec_destroy(&xs
->x
);
1140 /* --- Executable source operations --- */
1142 source_ops xsource_ops
= {
1144 xsource_option
, xsource_read
, xsource_attach
, xsource_destroy
1147 /*----- Exec target description -------------------------------------------*/
1149 /* --- @option@ --- */
1151 static int xtarget_option(target
*t
, scanner
*sc
)
1153 xtarget
*xt
= (xtarget
*)t
;
1154 return (exec_option(xt ?
&xt
->x
: 0, sc
));
1157 /* --- @read@ --- */
1159 static target
*xtarget_read(scanner
*sc
)
1164 if (!conf_prefix(sc
, "exec"))
1166 xt
= CREATE(xtarget
);
1167 xt
->t
.ops
= &xtarget_ops
;
1168 exec_read(&xt
->x
, sc
);
1169 exec_desc(&xt
->x
, &d
);
1170 xt
->t
.desc
= xstrdup(d
.buf
);
1175 /* --- @create@ --- */
1177 static endpt
*xtarget_create(target
*t
, const char *desc
)
1179 xtarget
*xt
= (xtarget
*)t
;
1180 endpt
*e
= exec_endpt(&xt
->x
, desc
);
1184 /* --- @destroy@ --- */
1186 static void xtarget_destroy(target
*t
)
1188 xtarget
*xt
= (xtarget
*)t
;
1190 exec_destroy(&xt
->x
);
1194 /* --- Exec target operations --- */
1196 target_ops xtarget_ops
= {
1198 xtarget_option
, xtarget_read
, xtarget_create
, xtarget_destroy
1201 /*----- That's all, folks -------------------------------------------------*/