lineage-rockchip/android_external_libudev-zero
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use buffered io

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This commit is contained in:
illiliti 2020-08-01 04:20:27 +03:00
parent c73a89dafc
commit 8547b55072
1 changed files with 14 additions and 13 deletions
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27
udev_device.c
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@ -1,4 +1,3 @@
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
@ -227,7 +226,7 @@ const char *udev_device_get_sysattr_value(struct udev_device *udev_device, const
struct udev_list_entry *list_entry;
char data[BUFSIZ], path[PATH_MAX];
struct stat st;
int fd;
FILE *file;
if (!udev_device || !sysattr) {
return NULL;
@ -245,18 +244,18 @@ const char *udev_device_get_sysattr_value(struct udev_device *udev_device, const
return NULL;
}
fd = open(path, O_RDONLY);
file = fopen(path, "r");
if (fd == -1) {
if (!file) {
return NULL;
}
if (read(fd, data, sizeof(data)) == -1) {
close(fd);
if (fread(data, 1, sizeof(data), file) != sizeof(data) && ferror(file)) {
fclose(file);
return NULL;
}
close(fd);
fclose(file);
data[strcspn(data, "\n")] = '\0';
list_entry = udev_list_entry_add(&udev_device->sysattrs, sysattr, data, 0);
return udev_list_entry_get_value(list_entry);
@ -266,7 +265,8 @@ int udev_device_set_sysattr_value(struct udev_device *udev_device, const char *s
{
char path[PATH_MAX];
struct stat st;
int fd;
size_t len;
FILE *file;
if (!udev_device || !sysattr || !value) {
return -1;
@ -278,18 +278,19 @@ int udev_device_set_sysattr_value(struct udev_device *udev_device, const char *s
return -1;
}
fd = open(path, O_WRONLY);
file = fopen(path, "w");
if (fd == -1) {
if (!file) {
return -1;
}
if (write(fd, value, strlen(value)) == -1) {
close(fd);
len = strlen(value);
if (fwrite(value, 1, len, file) != len) {
fclose(file);
return -1;
}
close(fd);
fclose(file);
udev_list_entry_add(&udev_device->sysattrs, sysattr, value, 1);
return 0;
}