* pipecmd - run a command, optionally connect pipes.
* @infd: input fd to write to child (if non-NULL)
* @outfd: output fd to read from child (if non-NULL)
+ * @errfd: error-output fd to read from child (if non-NULL)
* @cmd...: NULL-terminate list of command and arguments.
*
* If @infd is NULL, the child's input is (read-only) /dev/null.
* If @outfd is NULL, the child's output is (write-only) /dev/null.
+ * If @errfd is NULL, the child's stderr is (write-only) /dev/null.
+ *
+ * If @errfd == @outfd (and non-NULL) they will be shared.
*
* The return value is the pid of the child, or -1.
*/
-pid_t pipecmd(int *infd, int *outfd, const char *cmd, ...);
+pid_t pipecmd(int *infd, int *outfd, int *errfd, const char *cmd, ...);
/**
* pipecmdv - run a command, optionally connect pipes (stdarg version)
* @infd: input fd to write to child (if non-NULL)
* @outfd: output fd to read from child (if non-NULL)
+ * @errfd: error-output fd to read from child (if non-NULL)
* @cmd: command to run.
* @ap: argument list for arguments.
*/
-pid_t pipecmdv(int *infd, int *outfd, const char *cmd, va_list ap);
+pid_t pipecmdv(int *infd, int *outfd, int *errfd, const char *cmd, va_list ap);
+
+/**
+ * pipecmdarr - run a command, optionally connect pipes (char arry version)
+ * @infd: input fd to write to child (if non-NULL)
+ * @outfd: output fd to read from child (if non-NULL)
+ * @errfd: error-output fd to read from child (if non-NULL)
+ * @arr: NULL-terminated array for arguments (first is program to run).
+ */
+pid_t pipecmdarr(int *infd, int *outfd, int *errfd, char *const *arr);
#endif /* CCAN_PIPECMD_H */