X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fsd-daemon.c;fp=src%2Fsd-daemon.c;h=0000000000000000000000000000000000000000;hb=d41ba529b4d7a57456c030e5d20546e6f0abfef3;hp=763e079b4ec0ac7cfa9bda49341e29a0672f2e87;hpb=3bdf9c1d0a241eff2d17591854172725682b27cd;p=elogind.git diff --git a/src/sd-daemon.c b/src/sd-daemon.c deleted file mode 100644 index 763e079b4..000000000 --- a/src/sd-daemon.c +++ /dev/null @@ -1,530 +0,0 @@ -/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ - -/*** - Copyright 2010 Lennart Poettering - - Permission is hereby granted, free of charge, to any person - obtaining a copy of this software and associated documentation files - (the "Software"), to deal in the Software without restriction, - including without limitation the rights to use, copy, modify, merge, - publish, distribute, sublicense, and/or sell copies of the Software, - and to permit persons to whom the Software is furnished to do so, - subject to the following conditions: - - The above copyright notice and this permission notice shall be - included in all copies or substantial portions of the Software. - - THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, - EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF - MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND - NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS - BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN - ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN - CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - SOFTWARE. -***/ - -#ifndef _GNU_SOURCE -#define _GNU_SOURCE -#endif - -#include -#include -#include -#include -#ifdef __BIONIC__ -#include -#else -#include -#endif -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#if defined(__linux__) -#include -#endif - -#include "sd-daemon.h" - -#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; -#else - int r, fd; - const char *e; - char *p = NULL; - unsigned long l; - - if (!(e = getenv("LISTEN_PID"))) { - r = 0; - goto finish; - } - - errno = 0; - l = strtoul(e, &p, 10); - - if (errno != 0) { - r = -errno; - goto finish; - } - - if (!p || *p || l <= 0) { - r = -EINVAL; - goto finish; - } - - /* Is this for us? */ - if (getpid() != (pid_t) l) { - r = 0; - goto finish; - } - - if (!(e = getenv("LISTEN_FDS"))) { - r = 0; - goto finish; - } - - errno = 0; - l = strtoul(e, &p, 10); - - if (errno != 0) { - r = -errno; - goto finish; - } - - if (!p || *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) { - r = -errno; - goto finish; - } - - if (flags & FD_CLOEXEC) - continue; - - if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) < 0) { - r = -errno; - goto finish; - } - } - - r = (int) l; - -finish: - if (unset_environment) { - unsetenv("LISTEN_PID"); - unsetenv("LISTEN_FDS"); - } - - return r; -#endif -} - -_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 (!S_ISFIFO(st_fd.st_mode)) - return 0; - - 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 0; - - return -errno; - } - - return - st_path.st_dev == st_fd.st_dev && - st_path.st_ino == st_fd.st_ino; - } - - 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; - - if (fd < 0 || type < 0) - return -EINVAL; - - if (fstat(fd, &st_fd) < 0) - return -errno; - - if (!S_ISSOCK(st_fd.st_mode)) - return 0; - - if (type != 0) { - int other_type = 0; - socklen_t l = sizeof(other_type); - - if (getsockopt(fd, SOL_SOCKET, SO_TYPE, &other_type, &l) < 0) - return -errno; - - if (l != sizeof(other_type)) - return -EINVAL; - - if (other_type != type) - return 0; - } - - if (listening >= 0) { - int accepting = 0; - socklen_t l = sizeof(accepting); - - if (getsockopt(fd, SOL_SOCKET, SO_ACCEPTCONN, &accepting, &l) < 0) - return -errno; - - if (l != sizeof(accepting)) - return -EINVAL; - - if (!accepting != !listening) - return 0; - } - - return 1; -} - -union sockaddr_union { - struct sockaddr sa; - struct sockaddr_in in4; - struct sockaddr_in6 in6; - struct sockaddr_un un; - struct sockaddr_storage storage; -}; - -_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) - return r; - - if (family > 0) { - union sockaddr_union sockaddr; - socklen_t l; - - memset(&sockaddr, 0, sizeof(sockaddr)); - l = sizeof(sockaddr); - - if (getsockname(fd, &sockaddr.sa, &l) < 0) - return -errno; - - if (l < sizeof(sa_family_t)) - return -EINVAL; - - return sockaddr.sa.sa_family == family; - } - - return 1; -} - -_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) - return r; - - memset(&sockaddr, 0, sizeof(sockaddr)); - l = sizeof(sockaddr); - - if (getsockname(fd, &sockaddr.sa, &l) < 0) - return -errno; - - if (l < sizeof(sa_family_t)) - return -EINVAL; - - if (sockaddr.sa.sa_family != AF_INET && - sockaddr.sa.sa_family != AF_INET6) - return 0; - - if (family > 0) - if (sockaddr.sa.sa_family != family) - return 0; - - if (port > 0) { - if (sockaddr.sa.sa_family == AF_INET) { - if (l < sizeof(struct sockaddr_in)) - return -EINVAL; - - return htons(port) == sockaddr.in4.sin_port; - } else { - if (l < sizeof(struct sockaddr_in6)) - return -EINVAL; - - return htons(port) == sockaddr.in6.sin6_port; - } - } - - return 1; -} - -_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) - return r; - - memset(&sockaddr, 0, sizeof(sockaddr)); - l = sizeof(sockaddr); - - if (getsockname(fd, &sockaddr.sa, &l) < 0) - return -errno; - - if (l < sizeof(sa_family_t)) - return -EINVAL; - - if (sockaddr.sa.sa_family != AF_UNIX) - return 0; - - if (path) { - if (length <= 0) - length = strlen(path); - - if (length <= 0) - /* Unnamed socket */ - return l == offsetof(struct sockaddr_un, sun_path); - - if (path[0]) - /* Normal path socket */ - return - (l >= offsetof(struct sockaddr_un, sun_path) + length + 1) && - memcmp(path, sockaddr.un.sun_path, length+1) == 0; - else - /* Abstract namespace socket */ - return - (l == offsetof(struct sockaddr_un, sun_path) + length) && - memcmp(path, sockaddr.un.sun_path, length) == 0; - } - - return 1; -} - -_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 - int fd = -1, r; - struct msghdr msghdr; - struct iovec iovec; - union sockaddr_union sockaddr; - const char *e; - - if (!state) { - r = -EINVAL; - goto finish; - } - - if (!(e = getenv("NOTIFY_SOCKET"))) - return 0; - - /* Must be an abstract socket, or an absolute path */ - if ((e[0] != '@' && e[0] != '/') || e[1] == 0) { - r = -EINVAL; - goto finish; - } - - if ((fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0)) < 0) { - r = -errno; - goto finish; - } - - memset(&sockaddr, 0, sizeof(sockaddr)); - sockaddr.sa.sa_family = AF_UNIX; - strncpy(sockaddr.un.sun_path, e, sizeof(sockaddr.un.sun_path)); - - if (sockaddr.un.sun_path[0] == '@') - sockaddr.un.sun_path[0] = 0; - - memset(&iovec, 0, sizeof(iovec)); - iovec.iov_base = (char*) state; - iovec.iov_len = strlen(state); - - memset(&msghdr, 0, sizeof(msghdr)); - msghdr.msg_name = &sockaddr; - 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); - - msghdr.msg_iov = &iovec; - msghdr.msg_iovlen = 1; - - if (sendmsg(fd, &msghdr, MSG_NOSIGNAL) < 0) { - r = -errno; - goto finish; - } - - r = 1; - -finish: - if (unset_environment) - unsetenv("NOTIFY_SOCKET"); - - if (fd >= 0) - close(fd); - - return r; -#endif -} - -_sd_export_ int sd_notifyf(int unset_environment, const char *format, ...) { -#if defined(DISABLE_SYSTEMD) || !defined(__linux__) - return 0; -#else - va_list ap; - char *p = NULL; - int r; - - va_start(ap, format); - r = vasprintf(&p, format, ap); - va_end(ap); - - if (r < 0 || !p) - return -ENOMEM; - - r = sd_notify(unset_environment, p); - free(p); - - return r; -#endif -} - -_sd_export_ int sd_booted(void) { -#if defined(DISABLE_SYSTEMD) || !defined(__linux__) - return 0; -#else - - struct stat a, b; - - /* We simply test whether the systemd cgroup hierarchy is - * mounted */ - - if (lstat("/sys/fs/cgroup", &a) < 0) - return 0; - - if (lstat("/sys/fs/cgroup/systemd", &b) < 0) - return 0; - - return a.st_dev != b.st_dev; -#endif -}