#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/un.h>
+#ifdef __BIONIC__
+#include <linux/fcntl.h>
+#else
#include <sys/fcntl.h>
+#endif
#include <netinet/in.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <stdarg.h>
#include <stdio.h>
+#include <stddef.h>
+#include <limits.h>
+
+#if defined(__linux__)
+#include <mqueue.h>
+#endif
#include "sd-daemon.h"
-int sd_listen_fds(int unset_environment) {
+#if (__GNUC__ >= 4)
+#ifdef SD_EXPORT_SYMBOLS
+/* Export symbols */
+#define _sd_export_ __attribute__ ((visibility("default")))
+#else
+/* Don't export the symbols */
+#define _sd_export_ __attribute__ ((visibility("hidden")))
+#endif
+#else
+#define _sd_export_
+#endif
+
+_sd_export_ int sd_listen_fds(int unset_environment) {
#if defined(DISABLE_SYSTEMD) || !defined(__linux__)
return 0;
char *p = NULL;
unsigned long l;
- if (!(e = getenv("LISTEN_PID"))) {
+ e = getenv("LISTEN_PID");
+ if (!e) {
r = 0;
goto finish;
}
goto finish;
}
- if (!p || *p || l <= 0) {
+ if (!p || p == e || *p || l <= 0) {
r = -EINVAL;
goto finish;
}
goto finish;
}
- if (!(e = getenv("LISTEN_FDS"))) {
+ e = getenv("LISTEN_FDS");
+ if (!e) {
r = 0;
goto finish;
}
goto finish;
}
- if (!p || *p) {
+ if (!p || p == e || *p) {
r = -EINVAL;
goto finish;
}
for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + (int) l; fd ++) {
int flags;
- if ((flags = fcntl(fd, F_GETFD)) < 0) {
+ flags = fcntl(fd, F_GETFD);
+ if (flags < 0) {
r = -errno;
goto finish;
}
#endif
}
-int sd_is_fifo(int fd, const char *path) {
+_sd_export_ int sd_is_fifo(int fd, const char *path) {
struct stat st_fd;
if (fd < 0)
return -EINVAL;
- memset(&st_fd, 0, sizeof(st_fd));
if (fstat(fd, &st_fd) < 0)
return -errno;
if (path) {
struct stat st_path;
- memset(&st_path, 0, sizeof(st_path));
if (stat(path, &st_path) < 0) {
if (errno == ENOENT || errno == ENOTDIR)
return 1;
}
+_sd_export_ int sd_is_special(int fd, const char *path) {
+ struct stat st_fd;
+
+ if (fd < 0)
+ return -EINVAL;
+
+ if (fstat(fd, &st_fd) < 0)
+ return -errno;
+
+ if (!S_ISREG(st_fd.st_mode) && !S_ISCHR(st_fd.st_mode))
+ return 0;
+
+ if (path) {
+ struct stat st_path;
+
+ if (stat(path, &st_path) < 0) {
+
+ if (errno == ENOENT || errno == ENOTDIR)
+ return 0;
+
+ return -errno;
+ }
+
+ if (S_ISREG(st_fd.st_mode) && S_ISREG(st_path.st_mode))
+ return
+ st_path.st_dev == st_fd.st_dev &&
+ st_path.st_ino == st_fd.st_ino;
+ else if (S_ISCHR(st_fd.st_mode) && S_ISCHR(st_path.st_mode))
+ return st_path.st_rdev == st_fd.st_rdev;
+ else
+ return 0;
+ }
+
+ return 1;
+}
+
static int sd_is_socket_internal(int fd, int type, int listening) {
struct stat st_fd;
struct sockaddr_storage storage;
};
-int sd_is_socket(int fd, int family, int type, int listening) {
+_sd_export_ int sd_is_socket(int fd, int family, int type, int listening) {
int r;
if (family < 0)
return -EINVAL;
- if ((r = sd_is_socket_internal(fd, type, listening)) <= 0)
+ r = sd_is_socket_internal(fd, type, listening);
+ if (r <= 0)
return r;
if (family > 0) {
return 1;
}
-int sd_is_socket_inet(int fd, int family, int type, int listening, uint16_t port) {
+_sd_export_ int sd_is_socket_inet(int fd, int family, int type, int listening, uint16_t port) {
union sockaddr_union sockaddr;
socklen_t l;
int r;
if (family != 0 && family != AF_INET && family != AF_INET6)
return -EINVAL;
- if ((r = sd_is_socket_internal(fd, type, listening)) <= 0)
+ r = sd_is_socket_internal(fd, type, listening);
+ if (r <= 0)
return r;
memset(&sockaddr, 0, sizeof(sockaddr));
return 1;
}
-int sd_is_socket_unix(int fd, int type, int listening, const char *path, size_t length) {
+_sd_export_ int sd_is_socket_unix(int fd, int type, int listening, const char *path, size_t length) {
union sockaddr_union sockaddr;
socklen_t l;
int r;
- if ((r = sd_is_socket_internal(fd, type, listening)) <= 0)
+ r = sd_is_socket_internal(fd, type, listening);
+ if (r <= 0)
return r;
memset(&sockaddr, 0, sizeof(sockaddr));
return 0;
if (path) {
- if (length <= 0)
+ if (length == 0)
length = strlen(path);
- if (length <= 0)
+ if (length == 0)
/* Unnamed socket */
- return l == sizeof(sa_family_t);
+ return l == offsetof(struct sockaddr_un, sun_path);
if (path[0])
/* Normal path socket */
return
- (l >= sizeof(sa_family_t) + length + 1) &&
+ (l >= offsetof(struct sockaddr_un, sun_path) + length + 1) &&
memcmp(path, sockaddr.un.sun_path, length+1) == 0;
else
/* Abstract namespace socket */
return
- (l == sizeof(sa_family_t) + length) &&
+ (l == offsetof(struct sockaddr_un, sun_path) + length) &&
memcmp(path, sockaddr.un.sun_path, length) == 0;
}
return 1;
}
-int sd_notify(int unset_environment, const char *state) {
+_sd_export_ int sd_is_mq(int fd, const char *path) {
+#if !defined(__linux__)
+ return 0;
+#else
+ struct mq_attr attr;
+
+ if (fd < 0)
+ return -EINVAL;
+
+ if (mq_getattr(fd, &attr) < 0)
+ return -errno;
+
+ if (path) {
+ char fpath[PATH_MAX];
+ struct stat a, b;
+
+ if (path[0] != '/')
+ return -EINVAL;
+
+ if (fstat(fd, &a) < 0)
+ return -errno;
+
+ strncpy(stpcpy(fpath, "/dev/mqueue"), path, sizeof(fpath) - 12);
+ fpath[sizeof(fpath)-1] = 0;
+
+ if (stat(fpath, &b) < 0)
+ return -errno;
+
+ if (a.st_dev != b.st_dev ||
+ a.st_ino != b.st_ino)
+ return 0;
+ }
+
+ return 1;
+#endif
+}
+
+_sd_export_ int sd_notify(int unset_environment, const char *state) {
#if defined(DISABLE_SYSTEMD) || !defined(__linux__) || !defined(SOCK_CLOEXEC)
return 0;
#else
goto finish;
}
- if (!(e = getenv("NOTIFY_SOCKET")))
+ e = getenv("NOTIFY_SOCKET");
+ if (!e)
return 0;
/* Must be an abstract socket, or an absolute path */
goto finish;
}
- if ((fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0)) < 0) {
+ fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0);
+ if (fd < 0) {
r = -errno;
goto finish;
}
memset(&msghdr, 0, sizeof(msghdr));
msghdr.msg_name = &sockaddr;
- msghdr.msg_namelen = sizeof(sa_family_t) + strlen(e);
+ msghdr.msg_namelen = offsetof(struct sockaddr_un, sun_path) + strlen(e);
if (msghdr.msg_namelen > sizeof(struct sockaddr_un))
msghdr.msg_namelen = sizeof(struct sockaddr_un);
#endif
}
-int sd_notifyf(int unset_environment, const char *format, ...) {
+_sd_export_ int sd_notifyf(int unset_environment, const char *format, ...) {
#if defined(DISABLE_SYSTEMD) || !defined(__linux__)
return 0;
#else
#endif
}
-int sd_booted(void) {
+_sd_export_ int sd_booted(void) {
#if defined(DISABLE_SYSTEMD) || !defined(__linux__)
return 0;
#else
You may find an up-to-date version of these source files online:
- http://cgit.freedesktop.org/systemd/plain/src/sd-daemon.h
- http://cgit.freedesktop.org/systemd/plain/src/sd-daemon.c
+ http://cgit.freedesktop.org/systemd/systemd/plain/src/systemd/sd-daemon.h
+ http://cgit.freedesktop.org/systemd/systemd/plain/src/libsystemd-daemon/sd-daemon.c
This should compile on non-Linux systems, too, but with the
exception of the sd_is_xxx() calls all functions will become NOPs.
- See sd-daemon(7) for more information.
+ See sd-daemon(3) for more information.
*/
+#ifndef _sd_printf_attr_
#if __GNUC__ >= 4
#define _sd_printf_attr_(a,b) __attribute__ ((format (printf, a, b)))
-#define _sd_hidden_ __attribute__ ((visibility("hidden")))
#else
#define _sd_printf_attr_(a,b)
-#define _sd_hidden_
+#endif
#endif
/*
See sd_listen_fds(3) for more information.
*/
-int sd_listen_fds(int unset_environment) _sd_hidden_;
+int sd_listen_fds(int unset_environment);
/*
Helper call for identifying a passed file descriptor. Returns 1 if
See sd_is_fifo(3) for more information.
*/
-int sd_is_fifo(int fd, const char *path) _sd_hidden_;
+int sd_is_fifo(int fd, const char *path);
+
+/*
+ Helper call for identifying a passed file descriptor. Returns 1 if
+ the file descriptor is a special character device on the file
+ system stored under the specified path, 0 otherwise.
+ If path is NULL a path name check will not be done and the call
+ only verifies if the file descriptor refers to a special character.
+ Returns a negative errno style error code on failure.
+
+ See sd_is_special(3) for more information.
+*/
+int sd_is_special(int fd, const char *path);
/*
Helper call for identifying a passed file descriptor. Returns 1 if
See sd_is_socket(3) for more information.
*/
-int sd_is_socket(int fd, int family, int type, int listening) _sd_hidden_;
+int sd_is_socket(int fd, int family, int type, int listening);
/*
Helper call for identifying a passed file descriptor. Returns 1 if
See sd_is_socket_inet(3) for more information.
*/
-int sd_is_socket_inet(int fd, int family, int type, int listening, uint16_t port) _sd_hidden_;
+int sd_is_socket_inet(int fd, int family, int type, int listening, uint16_t port);
/*
Helper call for identifying a passed file descriptor. Returns 1 if
See sd_is_socket_unix(3) for more information.
*/
-int sd_is_socket_unix(int fd, int type, int listening, const char *path, size_t length) _sd_hidden_;
+int sd_is_socket_unix(int fd, int type, int listening, const char *path, size_t length);
+
+/*
+ Helper call for identifying a passed file descriptor. Returns 1 if
+ the file descriptor is a POSIX Message Queue of the specified name,
+ 0 otherwise. If path is NULL a message queue name check is not
+ done. Returns a negative errno style error code on failure.
+*/
+int sd_is_mq(int fd, const char *path);
/*
Informs systemd about changed daemon state. This takes a number of
- newline seperated environment-style variable assignments in a
+ newline separated environment-style variable assignments in a
string. The following variables are known:
READY=1 Tells systemd that daemon startup is finished (only
relevant for services of Type=notify). The passed
argument is a boolean "1" or "0". Since there is
- little value in signalling non-readiness the only
+ little value in signaling non-readiness the only
value daemons should send is "READY=1".
STATUS=... Passes a single-line status string back to systemd
MAINPID=... The main pid of a daemon, in case systemd did not
fork off the process itself. Example: "MAINPID=4711"
+ WATCHDOG=1 Tells systemd to update the watchdog timestamp.
+ Services using this feature should do this in
+ regular intervals. A watchdog framework can use the
+ timestamps to detect failed services.
+
Daemons can choose to send additional variables. However, it is
- recommened to prefix variable names not listed above with X_.
+ recommended to prefix variable names not listed above with X_.
Returns a negative errno-style error code on failure. Returns > 0
if systemd could be notified, 0 if it couldn't possibly because
See sd_notify(3) for more information.
*/
-int sd_notify(int unset_environment, const char *state) _sd_hidden_;
+int sd_notify(int unset_environment, const char *state);
/*
Similar to sd_notify() but takes a format string.
See sd_notifyf(3) for more information.
*/
-int sd_notifyf(int unset_environment, const char *format, ...) _sd_printf_attr_(2,3) _sd_hidden_;
+int sd_notifyf(int unset_environment, const char *format, ...) _sd_printf_attr_(2,3);
/*
Returns > 0 if the system was booted with systemd. Returns < 0 on
fine. You should NOT protect them with a call to this function. Also
note that this function checks whether the system, not the user
session is controlled by systemd. However the functions above work
- for both session and system services.
+ for both user and system services.
See sd_booted(3) for more information.
*/
-int sd_booted(void) _sd_hidden_;
+int sd_booted(void);
#ifdef __cplusplus
}
projects / platform / upstream / dbus.git / commitdiff