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Tweak the spawn API, again for POSIX.

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--

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
This commit is contained in:
NIIBE Yutaka 2022-11-28 13:10:48 +09:00
parent 60b6cfe71f
commit b35c3980c1
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GPG Key ID: 640114AF89DE6054
3 changed files with 14 additions and 14 deletions
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22
common/exechelp-posix.c
View File

@ -990,27 +990,24 @@ posix_open_null (int for_write)
static void
my_exec (const char *pgmname, const char *argv[],
int fd_in, int fd_out, int fd_err,
int (*spawn_cb) (void *), void *spawn_cb_arg)
void (*spawn_cb) (struct spawn_cb_arg *), void *spawn_cb_arg)
{
int i;
int ask_inherit = 0;
struct spawn_cb_arg sca;
sca.fds[0] = fd_in;
sca.fds[1] = fd_out;
sca.fds[2] = fd_err;
sca.except_fds = NULL;
sca.arg = spawn_cb_arg;
if (spawn_cb)
(*spawn_cb) (&sca);
/* Assign /dev/null to unused FDs. */
for (i = 0; i <= 2; i++)
if (sca.fds[i] == -1)
sca.fds[i] = posix_open_null (i);
if (spawn_cb)
ask_inherit = (*spawn_cb) (&sca);
/* Connect the standard files. */
for (i = 0; i <= 2; i++)
if (sca.fds[i] != i)
@ -1018,12 +1015,15 @@ my_exec (const char *pgmname, const char *argv[],
if (dup2 (sca.fds[i], i) == -1)
log_fatal ("dup2 std%s failed: %s\n",
i==0?"in":i==1?"out":"err", strerror (errno));
close (sca.fds[i]);
/*
* We don't close sca.fds[i] here, but close them by
* close_all_fds. Note that there may be same one in three of
* sca.fds[i].
*/
}
/* Close all other files. */
if (!ask_inherit)
close_all_fds (3, sca.except_fds);
close_all_fds (3, sca.except_fds);
execv (pgmname, (char *const *)argv);
/* No way to print anything, as we have may have closed all streams. */
@ -1033,7 +1033,7 @@ my_exec (const char *pgmname, const char *argv[],
static gpg_err_code_t
spawn_detached (gnupg_process_t process,
const char *pgmname, const char *argv[],
int (*spawn_cb) (void *), void *spawn_cb_arg)
void (*spawn_cb) (struct spawn_cb_arg *), void *spawn_cb_arg)
{
gpg_err_code_t ec;
pid_t pid;
@ -1107,7 +1107,7 @@ spawn_detached (gnupg_process_t process,
gpg_err_code_t
gnupg_process_spawn (const char *pgmname, const char *argv1[],
unsigned int flags,
int (*spawn_cb) (struct spawn_cb_arg *),
void (*spawn_cb) (struct spawn_cb_arg *),
void *spawn_cb_arg,
gnupg_process_t *r_process)
{

3
common/exechelp.h
View File

@ -214,6 +214,7 @@ typedef struct gnupg_process *gnupg_process_t;
struct spawn_cb_arg;
#ifdef NEED_STRUCT_SPAWN_CB_ARG
struct spawn_cb_arg {
int ask_inherit;
void *plpAttributeList;
HANDLE hd[16];
void *arg;
@ -252,7 +253,7 @@ struct spawn_cb_arg {
/* Spawn PGMNAME. */
gpg_err_code_t gnupg_process_spawn (const char *pgmname, const char *argv[],
unsigned int flags,
int (*spawn_cb) (struct spawn_cb_arg *),
void (*spawn_cb) (struct spawn_cb_arg *),
void *spawn_cb_arg,
gnupg_process_t *r_process);

3
common/exectool.c
View File

@ -301,13 +301,12 @@ copy_buffer_flush (struct copy_buffer *c, estream_t sink)
}
static int
static void
setup_close_all (struct spawn_cb_arg *sca)
{
int *user_except = sca->arg;
sca->except_fds = user_except;
return 0;
}
/* Run the program PGMNAME with the command line arguments given in