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era_copy
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Allow to create files

master
Vitaliy Filippov 2019-02-19 02:07:27 +03:00
parent 54b48b75e7
commit f69f7a88cb
1 changed files with 17 additions and 6 deletions
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23
era_apply.c
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@ -95,14 +95,25 @@ void read_era_copy_and_apply(int src, int dst)
void era_apply(char *dst_path)
{
struct stat sb;
int dst;
if (stat(dst_path, &sb) != 0)
int dst, flags = O_WRONLY | O_LARGEFILE;
if (stat(dst_path, &sb) == 0)
{
fprintf(stderr, "Failed to stat %s: %s\n", dst_path, strerror(errno));
exit(1);
// prevent writing to mounted devices
flags = flags | ((sb.st_mode & S_IFBLK) ? O_EXCL : 0);
}
// prevent writing to mounted devices
dst = open(dst_path, ((sb.st_mode & S_IFBLK) ? O_EXCL : 0) | O_WRONLY | O_LARGEFILE);
else
{
if (errno == ENOENT)
{
flags = flags | O_CREAT;
}
else
{
fprintf(stderr, "Failed to stat %s: %s\n", dst_path, strerror(errno));
exit(1);
}
}
dst = open(dst_path, flags, 0644);
if (dst < 0)
{
fprintf(stderr, "Failed to open %s for writing: %s\n", dst_path, strerror(errno));