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-rw-r--r--src/libsystemd/sd-daemon/sd-daemon.c213
-rw-r--r--src/notify/notify.c47
-rw-r--r--src/shared/util.c24
-rw-r--r--src/systemd/sd-daemon.h12
4 files changed, 163 insertions, 133 deletions
diff --git a/src/libsystemd/sd-daemon/sd-daemon.c b/src/libsystemd/sd-daemon/sd-daemon.c
index b013438de9..7caa63db14 100644
--- a/src/libsystemd/sd-daemon/sd-daemon.c
+++ b/src/libsystemd/sd-daemon/sd-daemon.c
@@ -36,13 +36,14 @@
#include <mqueue.h>
#include "util.h"
+#include "path-util.h"
#include "sd-daemon.h"
_public_ int sd_listen_fds(int unset_environment) {
- int r, fd;
const char *e;
- char *p = NULL;
- unsigned long l;
+ unsigned n;
+ int r, fd;
+ pid_t pid;
e = getenv("LISTEN_PID");
if (!e) {
@@ -50,21 +51,12 @@ _public_ int sd_listen_fds(int unset_environment) {
goto finish;
}
- errno = 0;
- l = strtoul(e, &p, 10);
-
- if (errno > 0) {
- r = -errno;
+ r = parse_pid(e, &pid);
+ if (r < 0)
goto finish;
- }
-
- if (!p || p == e || *p || l <= 0) {
- r = -EINVAL;
- goto finish;
- }
/* Is this for us? */
- if (getpid() != (pid_t) l) {
+ if (getpid() != pid) {
r = 0;
goto finish;
}
@@ -75,38 +67,17 @@ _public_ int sd_listen_fds(int unset_environment) {
goto finish;
}
- errno = 0;
- l = strtoul(e, &p, 10);
-
- if (errno > 0) {
- r = -errno;
- goto finish;
- }
-
- if (!p || p == e || *p) {
- r = -EINVAL;
+ r = safe_atou(e, &n);
+ if (r < 0)
goto finish;
- }
-
- for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + (int) l; fd ++) {
- int flags;
- flags = fcntl(fd, F_GETFD);
- if (flags < 0) {
- r = -errno;
+ for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + (int) n; fd ++) {
+ r = fd_cloexec(fd, true);
+ if (r < 0)
goto finish;
- }
-
- if (flags & FD_CLOEXEC)
- continue;
-
- if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) < 0) {
- r = -errno;
- goto finish;
- }
}
- r = (int) l;
+ r = (int) n;
finish:
if (unset_environment) {
@@ -120,8 +91,7 @@ finish:
_public_ int sd_is_fifo(int fd, const char *path) {
struct stat st_fd;
- if (fd < 0)
- return -EINVAL;
+ assert_return(fd >= 0, -EINVAL);
if (fstat(fd, &st_fd) < 0)
return -errno;
@@ -151,8 +121,7 @@ _public_ int sd_is_fifo(int fd, const char *path) {
_public_ int sd_is_special(int fd, const char *path) {
struct stat st_fd;
- if (fd < 0)
- return -EINVAL;
+ assert_return(fd >= 0, -EINVAL);
if (fstat(fd, &st_fd) < 0)
return -errno;
@@ -187,8 +156,8 @@ _public_ int sd_is_special(int fd, const char *path) {
static int sd_is_socket_internal(int fd, int type, int listening) {
struct stat st_fd;
- if (fd < 0 || type < 0)
- return -EINVAL;
+ assert_return(fd >= 0, -EINVAL);
+ assert_return(type >= 0, -EINVAL);
if (fstat(fd, &st_fd) < 0)
return -errno;
@@ -238,8 +207,8 @@ union sockaddr_union {
_public_ int sd_is_socket(int fd, int family, int type, int listening) {
int r;
- if (family < 0)
- return -EINVAL;
+ assert_return(fd >= 0, -EINVAL);
+ assert_return(family >= 0, -EINVAL);
r = sd_is_socket_internal(fd, type, listening);
if (r <= 0)
@@ -266,8 +235,8 @@ _public_ int sd_is_socket_inet(int fd, int family, int type, int listening, uint
socklen_t l = sizeof(sockaddr);
int r;
- if (family != 0 && family != AF_INET && family != AF_INET6)
- return -EINVAL;
+ assert_return(fd >= 0, -EINVAL);
+ assert_return(IN_SET(family, 0, AF_INET, AF_INET6), -EINVAL);
r = sd_is_socket_internal(fd, type, listening);
if (r <= 0)
@@ -283,7 +252,7 @@ _public_ int sd_is_socket_inet(int fd, int family, int type, int listening, uint
sockaddr.sa.sa_family != AF_INET6)
return 0;
- if (family > 0)
+ if (family != 0)
if (sockaddr.sa.sa_family != family)
return 0;
@@ -309,6 +278,8 @@ _public_ int sd_is_socket_unix(int fd, int type, int listening, const char *path
socklen_t l = sizeof(sockaddr);
int r;
+ assert_return(fd >= 0, -EINVAL);
+
r = sd_is_socket_internal(fd, type, listening);
if (r <= 0)
return r;
@@ -348,8 +319,7 @@ _public_ int sd_is_socket_unix(int fd, int type, int listening, const char *path
_public_ int sd_is_mq(int fd, const char *path) {
struct mq_attr attr;
- if (fd < 0)
- return -EINVAL;
+ assert_return(fd >= 0, -EINVAL);
if (mq_getattr(fd, &attr) < 0)
return -errno;
@@ -358,8 +328,7 @@ _public_ int sd_is_mq(int fd, const char *path) {
char fpath[PATH_MAX];
struct stat a, b;
- if (path[0] != '/')
- return -EINVAL;
+ assert_return(path_is_absolute(path), -EINVAL);
if (fstat(fd, &a) < 0)
return -errno;
@@ -378,12 +347,17 @@ _public_ int sd_is_mq(int fd, const char *path) {
return 1;
}
-_public_ int sd_notify(int unset_environment, const char *state) {
- int fd = -1, r;
- struct msghdr msghdr;
- struct iovec iovec;
- union sockaddr_union sockaddr;
+_public_ int sd_pid_notify(pid_t pid, int unset_environment, const char *state) {
+ union sockaddr_union sockaddr = {};
+ _cleanup_close_ int fd = -1;
+ struct msghdr msghdr = {};
+ struct iovec iovec = {};
const char *e;
+ union {
+ struct cmsghdr cmsghdr;
+ uint8_t buf[CMSG_SPACE(sizeof(struct ucred))];
+ } control = {};
+ int r;
if (!state) {
r = -EINVAL;
@@ -406,18 +380,15 @@ _public_ int sd_notify(int unset_environment, const char *state) {
goto finish;
}
- memzero(&sockaddr, 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;
- memzero(&iovec, sizeof(iovec));
iovec.iov_base = (char*) state;
iovec.iov_len = strlen(state);
- memzero(&msghdr, sizeof(msghdr));
msghdr.msg_name = &sockaddr;
msghdr.msg_namelen = offsetof(struct sockaddr_un, sun_path) + strlen(e);
@@ -427,39 +398,90 @@ _public_ int sd_notify(int unset_environment, const char *state) {
msghdr.msg_iov = &iovec;
msghdr.msg_iovlen = 1;
- if (sendmsg(fd, &msghdr, MSG_NOSIGNAL) < 0) {
- r = -errno;
+ if (pid != 0 && pid != getpid()) {
+ struct cmsghdr *cmsg;
+ struct ucred ucred = {};
+
+ msghdr.msg_control = &control;
+ msghdr.msg_controllen = sizeof(control);
+
+ cmsg = CMSG_FIRSTHDR(&msghdr);
+ cmsg->cmsg_level = SOL_SOCKET;
+ cmsg->cmsg_type = SCM_CREDENTIALS;
+ cmsg->cmsg_len = CMSG_LEN(sizeof(struct ucred));
+
+ ucred.pid = pid;
+ ucred.uid = getuid();
+ ucred.gid = getgid();
+
+ memcpy(CMSG_DATA(cmsg), &ucred, sizeof(struct ucred));
+ msghdr.msg_controllen = cmsg->cmsg_len;
+ }
+
+ /* First try with fake ucred data, as requested */
+ if (sendmsg(fd, &msghdr, MSG_NOSIGNAL) >= 0) {
+ r = 1;
goto finish;
}
- r = 1;
+ /* If that failed, try with our own instead */
+ if (msghdr.msg_control) {
+ msghdr.msg_control = NULL;
+ msghdr.msg_controllen = 0;
+
+ if (sendmsg(fd, &msghdr, MSG_NOSIGNAL) >= 0) {
+ r = 1;
+ goto finish;
+ }
+ }
+
+ r = -errno;
finish:
if (unset_environment)
unsetenv("NOTIFY_SOCKET");
- if (fd >= 0)
- close(fd);
-
return r;
}
+_public_ int sd_notify(int unset_environment, const char *state) {
+ return sd_pid_notify(0, unset_environment, state);
+}
+
+_public_ int sd_pid_notifyf(pid_t pid, int unset_environment, const char *format, ...) {
+ _cleanup_free_ char *p = NULL;
+ int r;
+
+ if (format) {
+ va_list ap;
+
+ va_start(ap, format);
+ r = vasprintf(&p, format, ap);
+ va_end(ap);
+
+ if (r < 0 || !p)
+ return -ENOMEM;
+ }
+
+ return sd_pid_notify(pid, unset_environment, p);
+}
+
_public_ int sd_notifyf(int unset_environment, const char *format, ...) {
- va_list ap;
- char *p = NULL;
+ _cleanup_free_ char *p = NULL;
int r;
- va_start(ap, format);
- r = vasprintf(&p, format, ap);
- va_end(ap);
+ if (format) {
+ va_list ap;
- if (r < 0 || !p)
- return -ENOMEM;
+ va_start(ap, format);
+ r = vasprintf(&p, format, ap);
+ va_end(ap);
- r = sd_notify(unset_environment, p);
- free(p);
+ if (r < 0 || !p)
+ return -ENOMEM;
+ }
- return r;
+ return sd_pid_notify(0, unset_environment, p);
}
_public_ int sd_booted(void) {
@@ -476,10 +498,9 @@ _public_ int sd_booted(void) {
}
_public_ int sd_watchdog_enabled(int unset_environment, uint64_t *usec) {
- unsigned long long ll;
- unsigned long l;
const char *e;
- char *p = NULL;
+ uint64_t u;
+ pid_t pid;
int r;
e = getenv("WATCHDOG_PID");
@@ -488,19 +509,12 @@ _public_ int sd_watchdog_enabled(int unset_environment, uint64_t *usec) {
goto finish;
}
- errno = 0;
- l = strtoul(e, &p, 10);
- if (errno > 0) {
- r = -errno;
- goto finish;
- }
- if (!p || p == e || *p || l <= 0) {
- r = -EINVAL;
+ r = parse_pid(e, &pid);
+ if (r < 0)
goto finish;
- }
/* Is this for us? */
- if (getpid() != (pid_t) l) {
+ if (getpid() != pid) {
r = 0;
goto finish;
}
@@ -511,19 +525,16 @@ _public_ int sd_watchdog_enabled(int unset_environment, uint64_t *usec) {
goto finish;
}
- errno = 0;
- ll = strtoull(e, &p, 10);
- if (errno > 0) {
- r = -errno;
+ r = safe_atou64(e, &u);
+ if (r < 0)
goto finish;
- }
- if (!p || p == e || *p || ll <= 0) {
+ if (u <= 0) {
r = -EINVAL;
goto finish;
}
if (usec)
- *usec = ll;
+ *usec = u;
r = 1;
diff --git a/src/notify/notify.c b/src/notify/notify.c
index 68133c408b..0b7f3b12f8 100644
--- a/src/notify/notify.c
+++ b/src/notify/notify.c
@@ -147,25 +147,25 @@ static int parse_argv(int argc, char *argv[]) {
}
int main(int argc, char* argv[]) {
- char* our_env[4], **final_env = NULL;
+ _cleanup_free_ char *status = NULL, *cpid = NULL, *n = NULL;
+ _cleanup_strv_free_ char **final_env = NULL;
+ char* our_env[4];
unsigned i = 0;
- char *status = NULL, *cpid = NULL, *n = NULL;
- int r, retval = EXIT_FAILURE;
+ int r;
log_parse_environment();
log_open();
r = parse_argv(argc, argv);
- if (r <= 0) {
- retval = r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+ if (r <= 0)
goto finish;
- }
if (arg_booted)
return sd_booted() <= 0;
if (arg_readahead) {
- if ((r = sd_readahead(arg_readahead)) < 0) {
+ r = sd_readahead(arg_readahead);
+ if (r < 0) {
log_error("Failed to issue read-ahead control command: %s", strerror(-r));
goto finish;
}
@@ -175,8 +175,9 @@ int main(int argc, char* argv[]) {
our_env[i++] = (char*) "READY=1";
if (arg_status) {
- if (!(status = strappend("STATUS=", arg_status))) {
- log_error("Failed to allocate STATUS string.");
+ status = strappend("STATUS=", arg_status);
+ if (!status) {
+ r = log_oom();
goto finish;
}
@@ -185,7 +186,7 @@ int main(int argc, char* argv[]) {
if (arg_pid > 0) {
if (asprintf(&cpid, "MAINPID="PID_FMT, arg_pid) < 0) {
- log_error("Failed to allocate MAINPID string.");
+ r = log_oom();
goto finish;
}
@@ -194,34 +195,32 @@ int main(int argc, char* argv[]) {
our_env[i++] = NULL;
- if (!(final_env = strv_env_merge(2, our_env, argv + optind))) {
- log_error("Failed to merge string sets.");
+ final_env = strv_env_merge(2, our_env, argv + optind);
+ if (!final_env) {
+ r = log_oom();
goto finish;
}
if (strv_length(final_env) <= 0) {
- retval = EXIT_SUCCESS;
+ r = 0;
goto finish;
}
- if (!(n = strv_join(final_env, "\n"))) {
- log_error("Failed to concatenate strings.");
+ n = strv_join(final_env, "\n");
+ if (!n) {
+ r = log_oom();
goto finish;
}
- if ((r = sd_notify(false, n)) < 0) {
+ r = sd_pid_notify(arg_pid, false, n);
+ if (r < 0) {
log_error("Failed to notify init system: %s", strerror(-r));
goto finish;
}
- retval = r <= 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+ if (r == 0)
+ r = -ENOTSUP;
finish:
- free(status);
- free(cpid);
- free(n);
-
- strv_free(final_env);
-
- return retval;
+ return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
diff --git a/src/shared/util.c b/src/shared/util.c
index 4a3e35f356..7a4dacd213 100644
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -1377,17 +1377,21 @@ bool ignore_file(const char *filename) {
}
int fd_nonblock(int fd, bool nonblock) {
- int flags;
+ int flags, nflags;
assert(fd >= 0);
- if ((flags = fcntl(fd, F_GETFL, 0)) < 0)
+ flags = fcntl(fd, F_GETFL, 0);
+ if (flags < 0)
return -errno;
if (nonblock)
- flags |= O_NONBLOCK;
+ nflags = flags | O_NONBLOCK;
else
- flags &= ~O_NONBLOCK;
+ nflags = flags & ~O_NONBLOCK;
+
+ if (nflags == flags)
+ return 0;
if (fcntl(fd, F_SETFL, flags) < 0)
return -errno;
@@ -1396,17 +1400,21 @@ int fd_nonblock(int fd, bool nonblock) {
}
int fd_cloexec(int fd, bool cloexec) {
- int flags;
+ int flags, nflags;
assert(fd >= 0);
- if ((flags = fcntl(fd, F_GETFD, 0)) < 0)
+ flags = fcntl(fd, F_GETFD, 0);
+ if (flags < 0)
return -errno;
if (cloexec)
- flags |= FD_CLOEXEC;
+ nflags = flags | FD_CLOEXEC;
else
- flags &= ~FD_CLOEXEC;
+ nflags = flags & ~FD_CLOEXEC;
+
+ if (nflags == flags)
+ return 0;
if (fcntl(fd, F_SETFD, flags) < 0)
return -errno;
diff --git a/src/systemd/sd-daemon.h b/src/systemd/sd-daemon.h
index 1d636df3ea..351b4e59c4 100644
--- a/src/systemd/sd-daemon.h
+++ b/src/systemd/sd-daemon.h
@@ -231,6 +231,18 @@ int sd_notify(int unset_environment, const char *state);
int sd_notifyf(int unset_environment, const char *format, ...) _sd_printf_(2,3);
/*
+ Similar to sd_notify(), but send the message on behalf of another
+ process, if the appropriate permissions are available.
+*/
+int sd_pid_notify(pid_t pid, int unset_environment, const char *state);
+
+/*
+ Similar to sd_notifyf(), but send the message on behalf of another
+ process, if the appropriate permissions are available.
+*/
+int sd_pid_notifyf(pid_t pid, int unset_environment, const char *format, ...) _sd_printf_(3,4);
+
+/*
Returns > 0 if the system was booted with systemd. Returns < 0 on
error. Returns 0 if the system was not booted with systemd. Note
that all of the functions above handle non-systemd boots just
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-12-03 22:30:02 +0000