X-Git-Url: http://git.annexia.org/?p=libguestfs.git;a=blobdiff_plain;f=daemon%2Fdaemon.h;h=977dfdcbad3af95d56d89a31cbf5b885528b0a7d;hp=ac6847927116bb3c89f5f28411b4fe1810b5dd68;hb=07369cb77a07f965cbf8e02f485c78a22c091f85;hpb=3e70b34eed5a48640e20fbf6dcba774aaace1f3c diff --git a/daemon/daemon.h b/daemon/daemon.h index ac68479..977dfdc 100644 --- a/daemon/daemon.h +++ b/daemon/daemon.h @@ -19,6 +19,7 @@ #ifndef GUESTFSD_DAEMON_H #define GUESTFSD_DAEMON_H +#include #include #include #include @@ -52,7 +53,9 @@ extern void free_stringslen (char **argv, int len); #define commandv(out,err,argv) commandvf((out),(err),0,(argv)) #define commandrv(out,err,argv) commandrvf((out),(err),0,(argv)) -#define COMMAND_FLAG_FOLD_STDOUT_ON_STDERR 1 +#define COMMAND_FLAG_FD_MASK (1024-1) +#define COMMAND_FLAG_FOLD_STDOUT_ON_STDERR 1024 +#define COMMAND_FLAG_CHROOT_COPY_FILE_TO_STDIN 2048 extern int commandf (char **stdoutput, char **stderror, int flags, const char *name, ...); @@ -65,7 +68,11 @@ extern int commandrvf (char **stdoutput, char **stderror, int flags, extern char **split_lines (char *str); -extern int device_name_translation (char *device, const char *func); +extern void trim (char *str); + +extern int device_name_translation (char *device); + +extern int prog_exists (const char *prog); extern void udev_settle (void); @@ -101,24 +108,39 @@ extern guestfs_int_lvm_pv_list *parse_command_line_pvs (void); extern guestfs_int_lvm_vg_list *parse_command_line_vgs (void); extern guestfs_int_lvm_lv_list *parse_command_line_lvs (void); +/*-- in optgroups.c (auto-generated) --*/ +struct optgroup { + const char *group; /* Name of the optional group. */ + int (*available) (void); /* Function to test availability. */ +}; +extern struct optgroup optgroups[]; + +/*-- in sync.c --*/ +/* Use this as a replacement for sync(2). */ +extern int sync_disks (void); + /*-- in proto.c --*/ extern void main_loop (int sock) __attribute__((noreturn)); -/* ordinary daemon functions use these to indicate errors */ +/* ordinary daemon functions use these to indicate errors + * NB: you don't need to prefix the string with the current command, + * it is added automatically by the client-side RPC stubs. + */ extern void reply_with_error (const char *fs, ...) __attribute__((format (printf,1,2))); -extern void reply_with_perror (const char *fs, ...) - __attribute__((format (printf,1,2))); +extern void reply_with_perror_errno (int err, const char *fs, ...) + __attribute__((format (printf,2,3))); +#define reply_with_perror(...) reply_with_perror_errno(errno, __VA_ARGS__) /* daemon functions that receive files (FileIn) should call * receive_file for each FileIn parameter. */ -typedef int (*receive_cb) (void *opaque, const void *buf, int len); +typedef int (*receive_cb) (void *opaque, const void *buf, size_t len); extern int receive_file (receive_cb cb, void *opaque); /* daemon functions that receive files (FileIn) can call this * to cancel incoming transfers (eg. if there is a local error), - * but they MUST then call reply_with_error or reply_with_perror. + * but they MUST then call reply_with_*. */ extern void cancel_receive (void); @@ -135,9 +157,10 @@ extern void reply (xdrproc_t xdrp, char *ret); /* Helper for functions that need a root filesystem mounted. * NB. Cannot be used for FileIn functions. */ -#define NEED_ROOT(fail_stmt) \ +#define NEED_ROOT(cancel_stmt,fail_stmt) \ do { \ if (!root_mounted) { \ + cancel_stmt; \ reply_with_error ("%s: you must call 'mount' first to mount the root filesystem", __func__); \ fail_stmt; \ } \ @@ -147,9 +170,10 @@ extern void reply (xdrproc_t xdrp, char *ret); /* Helper for functions that need an argument ("path") that is absolute. * NB. Cannot be used for FileIn functions. */ -#define ABS_PATH(path,fail_stmt) \ +#define ABS_PATH(path,cancel_stmt,fail_stmt) \ do { \ if ((path)[0] != '/') { \ + cancel_stmt; \ reply_with_error ("%s: path must start with a / character", __func__); \ fail_stmt; \ } \ @@ -162,14 +186,20 @@ extern void reply (xdrproc_t xdrp, char *ret); * * NB. Cannot be used for FileIn functions. */ -#define RESOLVE_DEVICE(path,fail_stmt) \ +#define RESOLVE_DEVICE(path,cancel_stmt,fail_stmt) \ do { \ if (STRNEQLEN ((path), "/dev/", 5)) { \ + cancel_stmt; \ reply_with_error ("%s: %s: expecting a device name", __func__, (path)); \ fail_stmt; \ } \ - if (device_name_translation ((path), __func__) == -1) \ + if (device_name_translation ((path)) == -1) { \ + int err = errno; \ + cancel_stmt; \ + errno = err; \ + reply_with_perror ("%s: %s", __func__, path); \ fail_stmt; \ + } \ } while (0) /* Helper for functions which need either an absolute path in the @@ -182,13 +212,13 @@ extern void reply (xdrproc_t xdrp, char *ret); * because we intend in future to make device parameters a distinct * type from filenames. */ -#define REQUIRE_ROOT_OR_RESOLVE_DEVICE(path,fail_stmt) \ +#define REQUIRE_ROOT_OR_RESOLVE_DEVICE(path,cancel_stmt,fail_stmt) \ do { \ - if (STREQLEN ((path), "/dev/", 5)) \ - RESOLVE_DEVICE ((path), fail_stmt); \ + if (STREQLEN ((path), "/dev/", 5)) \ + RESOLVE_DEVICE ((path), cancel_stmt, fail_stmt); \ else { \ - NEED_ROOT (fail_stmt); \ - ABS_PATH ((path),fail_stmt); \ + NEED_ROOT (cancel_stmt, fail_stmt); \ + ABS_PATH ((path), cancel_stmt, fail_stmt); \ } \ } while (0) @@ -224,6 +254,16 @@ extern void reply (xdrproc_t xdrp, char *ret); } \ while (0) +/* Marks functions which are not available. + * NB. Cannot be used for FileIn functions. + */ +#define NOT_AVAILABLE(errcode) \ + do { \ + reply_with_error ("%s: function not available", __func__); \ + return (errcode); \ + } \ + while (0) + #ifndef __attribute__ # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 8) # define __attribute__(x) /* empty */