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util-lib: split out file attribute calls to chattr-util.[ch]

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This commit is contained in:
Lennart Poettering
2015-10-27 13:25:56 +01:00
parent 89a5a90cb0
commit c8b3094de5
12 changed files with 144 additions and 85 deletions
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src/basic/util.c
-79
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@@ -1962,85 +1962,6 @@ int is_device_node(const char *path) {
return !!(S_ISBLK(info.st_mode) || S_ISCHR(info.st_mode));
}
int chattr_fd(int fd, unsigned value, unsigned mask) {
unsigned old_attr, new_attr;
struct stat st;
assert(fd >= 0);
if (fstat(fd, &st) < 0)
return -errno;
/* Explicitly check whether this is a regular file or
* directory. If it is anything else (such as a device node or
* fifo), then the ioctl will not hit the file systems but
* possibly drivers, where the ioctl might have different
* effects. Notably, DRM is using the same ioctl() number. */
if (!S_ISDIR(st.st_mode) && !S_ISREG(st.st_mode))
return -ENOTTY;
if (mask == 0)
return 0;
if (ioctl(fd, FS_IOC_GETFLAGS, &old_attr) < 0)
return -errno;
new_attr = (old_attr & ~mask) | (value & mask);
if (new_attr == old_attr)
return 0;
if (ioctl(fd, FS_IOC_SETFLAGS, &new_attr) < 0)
return -errno;
return 1;
}
int chattr_path(const char *p, unsigned value, unsigned mask) {
_cleanup_close_ int fd = -1;
assert(p);
if (mask == 0)
return 0;
fd = open(p, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW);
if (fd < 0)
return -errno;
return chattr_fd(fd, value, mask);
}
int read_attr_fd(int fd, unsigned *ret) {
struct stat st;
assert(fd >= 0);
if (fstat(fd, &st) < 0)
return -errno;
if (!S_ISDIR(st.st_mode) && !S_ISREG(st.st_mode))
return -ENOTTY;
if (ioctl(fd, FS_IOC_GETFLAGS, ret) < 0)
return -errno;
return 0;
}
int read_attr_path(const char *p, unsigned *ret) {
_cleanup_close_ int fd = -1;
assert(p);
assert(ret);
fd = open(p, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW);
if (fd < 0)
return -errno;
return read_attr_fd(fd, ret);
}
int syslog_parse_priority(const char **p, int *priority, bool with_facility) {
int a = 0, b = 0, c = 0;
int k;