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From: Leonid Krivoshein <klark.devel@gmail.com>
To: make-initrd@lists.altlinux.org
Subject: Re: [make-initrd] [PATCH 1/3] Reimplement ueventd
Date: Mon, 15 May 2023 02:08:09 +0300
Message-ID: <f73ff65f-409b-2c67-fe42-969d089e5c24@gmail.com> (raw)
In-Reply-To: <6b444ed922286eb3df8f5322b1bddf9c55753eb8.1683200226.git.gladkov.alexey@gmail.com>

Тут ошибок нет, но есть над чем позудеть.))


On 5/4/23 16:42, Alexey Gladkov wrote:
> [...]
> diff --git a/datasrc/ueventd/path.c b/datasrc/ueventd/path.c
> new file mode 100644
> index 00000000..7880ad5c
> --- /dev/null
> +++ b/datasrc/ueventd/path.c
> @@ -0,0 +1,80 @@
> +/* SPDX-License-Identifier: GPL-2.0-or-later */
> +
> +#include <stdlib.h>
> +#include <dirent.h>
> +#include <fcntl.h>
> +#include <errno.h>
> +
> +#include "ueventd.h"
> +
> +int is_dot_dir(struct dirent *ent)
> +{
> +	return (ent->d_type == DT_DIR &&
> +	        (ent->d_name[0] == '.' && (ent->d_name[1] == '\0' ||
> +	                                   (ent->d_name[1] == '.' && ent->d_name[2] == '\0') )));
> +}
> +
> +DIR *xopendir(const char *path)
> +{
> +	DIR *dir = opendir(path);
> +	if (!dir)
> +		fatal("opendir: %s: %m", path);
> +	return dir;
> +}
> +
> +
> +struct dirent *xreaddir(DIR *d, const char *path)
> +{
> +	struct dirent *ent;
> +
> +	errno = 0;
> +	ent = readdir(d);
> +	if (!ent) {
> +		if (!errno)
> +			return NULL;

Создавать этот NULL дольше, чем вернуть готовый ent. Я бы поменял 
условие на if (!ent && errno) fatal(...); Получится даже короче и 
читабельней.


> +		fatal("readdir: %s: %m", path);
> +	}
> +	return ent;
> +}
> +
> +int empty_directory(const char *path)
> +{
> +	struct dirent *ent;
> +	int is_empty = 1;
> +	DIR *d = xopendir(path);
> +
> +	while ((ent = xreaddir(d, path)) != NULL) {
> +		if (ent->d_name[0] != '.') {
> +			is_empty = 0;
> +			break;
> +		}
> +	}
> +	closedir(d);
> +
> +	return is_empty;
> +}

Назначение функции по имени кажется двусмысленным и можно обойтись без 
этой переменной в стеке, даже немного сократив код:

int is_dir_empty(const char *path)
{
         struct dirent *ent;
         DIR *d = xopendir(path);

         while ((ent = xreaddir(d, path)) != NULL) {
                 if (ent->d_name[0] != '.') {
                         closedir(d);
                         return 0;
                 }
         }
         closedir(d);

         return -1;
}

Не помню, какую задачу решает этот минус, но кажется правильней для 
логического значения.


> +
> +ssize_t read_retry(int fd, void *buf, size_t count)
> +{
> +	return TEMP_FAILURE_RETRY(read(fd, buf, count));
> +}
> +
> +ssize_t write_retry(int fd, const void *buf, size_t count)
> +{
> +	return TEMP_FAILURE_RETRY(write(fd, buf, count));
> +}
> +
> +ssize_t write_loop(int fd, const char *buffer, size_t count)
> +{
> +	ssize_t offset = 0;
> +
> +	while (count > 0) {
> +		ssize_t block = write_retry(fd, &buffer[offset], count);
> +
> +		if (block <= 0)
> +			return offset ? : block;

Первый раз встречаю в такой нотации. Перед двоеточием имеется ввиду тоже 
offset?


> +		offset += block;
> +		count -= (size_t) block;
> +	}
> +	return offset;
> +}
> [...]


-- 
WBR, Leonid Krivoshein.


  parent reply	other threads:[~2023-05-14 23:08 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-05-04 13:42 [make-initrd] [PATCH 0/3] " Alexey Gladkov
2023-05-04 13:42 ` [make-initrd] [PATCH 1/3] " Alexey Gladkov
2023-05-05  3:08   ` Leonid Krivoshein
2023-05-05 17:02     ` Alexey Gladkov
2023-05-05  4:03   ` Leonid Krivoshein
2023-05-05 17:16     ` Alexey Gladkov
2023-05-05  5:21   ` Leonid Krivoshein
2023-05-05 17:24     ` Alexey Gladkov
2023-05-14 20:12   ` Leonid Krivoshein
2023-05-14 20:45     ` Alexey Gladkov
2023-05-14 20:57   ` Leonid Krivoshein
2023-05-15  8:52     ` Alexey Gladkov
2023-05-14 23:08   ` Leonid Krivoshein [this message]
2023-05-15  9:05     ` Alexey Gladkov
2023-05-15  0:47   ` Leonid Krivoshein
2023-05-15  9:12     ` Alexey Gladkov
2023-05-15  4:38   ` Leonid Krivoshein
2023-05-15 10:43     ` Alexey Gladkov
2023-05-18  6:39         ` Leonid Krivoshein
2023-05-18  7:05           ` Alexey Gladkov
2023-05-20  9:00   ` Leonid Krivoshein
2023-05-20 13:18     ` Alexey Gladkov
2023-05-20 15:17       ` Vladimir D. Seleznev
2023-05-20 17:23       ` Leonid Krivoshein
2023-05-20 18:51         ` Alexey Gladkov
2023-05-21  8:53         ` [make-initrd] [PATCH] ueventd: Don't use a epoll timeout when it's not needed Alexey Gladkov
2023-05-22  4:46           ` Leonid Krivoshein
2023-05-22  7:54             ` Alexey Gladkov
2023-05-22  9:19               ` Alexey Gladkov
2023-05-22  7:57             ` [make-initrd] [PATCH 1/2] ueventd: Fix memory leak Alexey Gladkov
2023-05-22  7:57             ` [make-initrd] [PATCH 2/2] ueventd: Change interface rd_asprintf_or_die Alexey Gladkov
2023-05-22  9:36               ` [make-initrd] [PATCH v2] " Alexey Gladkov
2023-05-20 16:37     ` [make-initrd] [PATCH 1/3] ueventd: Simplify call of the queue handler Alexey Gladkov
2023-05-20 16:37     ` [make-initrd] [PATCH 2/3] ueventd: Rename fd_list to fd_handler_list Alexey Gladkov
2023-05-20 16:37     ` [make-initrd] [PATCH 3/3] ueventd: Drop obsolete declarations Alexey Gladkov
2023-05-04 13:42 ` [make-initrd] [PATCH 2/3] Replace polld by uevent queue Alexey Gladkov
2023-05-04 13:42 ` [make-initrd] [PATCH 3/3] feature/kickstart: Reset rootdelay timer after kickstart Alexey Gladkov
2023-05-06 19:45 ` [make-initrd] ueventd: Add a prefix to the logging functions to avoid name collisions Alexey Gladkov
2023-05-06 19:45 ` [make-initrd] ueventd: Allow to configure the log destination Alexey Gladkov
2023-05-06 19:45 ` [make-initrd] ueventd: Pass the program name when initializing the logger Alexey Gladkov
2023-05-06 19:45 ` [make-initrd] ueventd: Rewrite logging function to make it more atomic Alexey Gladkov
2023-05-07 12:48 ` [make-initrd] [PATCH 0/3] Reimplement ueventd Alexey Gladkov
2023-05-13 11:50 ` Alexey Gladkov
2023-05-14 20:15   ` Leonid Krivoshein
2023-05-14 20:49     ` Alexey Gladkov

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