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Add CLOSE_AND_REPLACE helper

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Similar to free_and_replace. I think this should be uppercase to make it
clear that this is a macro. free_and_replace should probably be uppercased
too.
This commit is contained in:
Zbigniew Jędrzejewski-Szmek 2020-09-16 15:36:44 +02:00
parent 831d57953e
commit 0706c01259
7 changed files with 17 additions and 16 deletions
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6
src/basic/fd-util.c
View File

@ -731,8 +731,7 @@ int fd_duplicate_data_fd(int fd) {
if (f != 0)
return -errno;
safe_close(copy_fd);
copy_fd = TAKE_FD(tmp_fd);
CLOSE_AND_REPLACE(copy_fd, tmp_fd);
remains = mfree(remains);
remains_size = 0;
@ -865,8 +864,7 @@ int rearrange_stdio(int original_input_fd, int original_output_fd, int original_
goto finish;
}
safe_close(null_fd);
null_fd = copy;
CLOSE_AND_REPLACE(null_fd, copy);
}
}

10
src/basic/fd-util.h
View File

@ -93,6 +93,16 @@ static inline int make_null_stdio(void) {
_fd_; \
})
/* Like free_and_replace(), but for file descriptors */
#define CLOSE_AND_REPLACE(a, b) \
({ \
int *_fdp_ = &(a); \
safe_close(*_fdp_); \
*_fdp_ = TAKE_FD(b); \
0; \
})
int fd_reopen(int fd, int flags);
int read_nr_open(void);

3
src/core/execute.c
View File

@ -4217,8 +4217,7 @@ static int exec_child(
return log_unit_error_errno(unit, errno, "Couldn't move exec fd up: %m");
}
safe_close(exec_fd);
exec_fd = moved_fd;
CLOSE_AND_REPLACE(exec_fd, moved_fd);
} else {
/* This fd should be FD_CLOEXEC already, but let's make sure. */
r = fd_cloexec(exec_fd, true);

4
src/import/import-raw.c
View File

@ -185,9 +185,7 @@ static int raw_import_maybe_convert_qcow2(RawImport *i) {
(void) unlink(i->temp_path);
free_and_replace(i->temp_path, t);
safe_close(i->output_fd);
i->output_fd = TAKE_FD(converted_fd);
CLOSE_AND_REPLACE(i->output_fd, converted_fd);
return 1;
}

4
src/import/pull-raw.c
View File

@ -253,9 +253,7 @@ static int raw_pull_maybe_convert_qcow2(RawPull *i) {
(void) unlink(i->temp_path);
free_and_replace(i->temp_path, t);
safe_close(i->raw_job->disk_fd);
i->raw_job->disk_fd = TAKE_FD(converted_fd);
CLOSE_AND_REPLACE(i->raw_job->disk_fd, converted_fd);
return 1;
}

3
src/libsystemd-network/sd-ipv4acd.c
View File

@ -471,8 +471,7 @@ int sd_ipv4acd_start(sd_ipv4acd *acd, bool reset_conflicts) {
if (r < 0)
return r;
safe_close(acd->fd);
acd->fd = r;
CLOSE_AND_REPLACE(acd->fd, r);
acd->defend_window = 0;
if (reset_conflicts)

3
src/login/logind-session-device.c
View File

@ -195,8 +195,7 @@ static int session_device_start(SessionDevice *sd) {
/* For evdev devices, the file descriptor might be left uninitialized. This might happen while resuming
* into a session and logind has been restarted right before. */
safe_close(sd->fd);
sd->fd = r;
CLOSE_AND_REPLACE(sd->fd, r);
break;
case DEVICE_TYPE_UNKNOWN: