diff options
| -rw-r--r-- | util.c | 53 | ||||
| -rw-r--r-- | util.h | 1 |
2 files changed, 54 insertions, 0 deletions
@@ -365,6 +365,59 @@ bool ns_is_init(void) } /** + * struct open_in_ns_args - Parameters for do_open_in_ns() + * @c: Execution context + * @fd: Filled in with return value from open() + * @err: Filled in with errno if open() failed + * @path: Path to open + * @flags: open() flags + */ +struct open_in_ns_args { + const struct ctx *c; + int fd; + int err; + const char *path; + int flags; +}; + +/** + * do_open_in_ns() - Enter namespace and open a file + * @arg: See struct open_in_ns_args + * + * Must be called via NS_CALL() + */ +static int do_open_in_ns(void *arg) +{ + struct open_in_ns_args *a = (struct open_in_ns_args *)arg; + + ns_enter(a->c); + + a->fd = open(a->path, a->flags); + a->err = errno; + + return 0; +} + +/** + * open_in_ns() - open() within the pasta namespace + * @c: Execution context + * @path: Path to open + * @flags: open() flags + * + * Return: fd of open()ed file or -1 on error, errno is set to indicate error + */ +int open_in_ns(const struct ctx *c, const char *path, int flags) +{ + struct open_in_ns_args arg = { + .c = c, .path = path, .flags = flags, + }; + + NS_CALL(do_open_in_ns, &arg); + errno = arg.err; + return arg.fd; +} + +/** * pid_file() - Write PID to file, if requested to do so, and close it * @fd: Open PID file descriptor, closed on exit, -1 to skip writing it * @pid: PID value to write @@ -219,6 +219,7 @@ int bitmap_isset(const uint8_t *map, int bit); char *line_read(char *buf, size_t len, int fd); void ns_enter(const struct ctx *c); bool ns_is_init(void); +int open_in_ns(const struct ctx *c, const char *path, int flags); void write_pidfile(int fd, pid_t pid); int __daemon(int pidfile_fd, int devnull_fd); int fls(unsigned long x); |