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Workaround seccomp on MagiskBoot

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Close #1150
This commit is contained in:
topjohnwu 2019-03-02 05:45:55 -05:00
parent d8cd2031c7
commit dee3c3e7ba
1 changed files with 7 additions and 3 deletions
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10
native/jni/utils/file.cpp
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@ -358,9 +358,13 @@ void full_read_at(int dirfd, const char *filename, void **buf, size_t *size) {
}
void write_zero(int fd, size_t size) {
size_t pos = lseek(fd, 0, SEEK_CUR);
ftruncate(fd, pos + size);
lseek(fd, pos + size, SEEK_SET);
char buf[4096] = {0};
size_t len;
while (size > 0) {
len = sizeof(buf) > size ? size : sizeof(buf);
write(fd, buf, len);
size -= len;
}
}
void file_readline(const char *filename, const function<bool (string_view&)> &fn, bool trim) {