X-Git-Url: http://git.liburcu.org/?p=lttng-ust.git;a=blobdiff_plain;f=liblttng-ust-fork%2Fustfork.c;h=71c4b86c1189ff7f89e1f7edba541c5d69d98df5;hp=b10f24d23f4e9a7f42b891cdaa44366e0e444ce9;hb=HEAD;hpb=d0c8f180cac01b888a81ce8abb47ce9e57925a53

diff --git a/liblttng-ust-fork/ustfork.c b/liblttng-ust-fork/ustfork.c
deleted file mode 100644
index b10f24d2..00000000
--- a/liblttng-ust-fork/ustfork.c
+++ /dev/null
@@ -1,440 +0,0 @@
-/*
- * SPDX-License-Identifier: LGPL-2.1-only
- *
- * Copyright (C) 2009  Pierre-Marc Fournier
- * Copyright (C) 2011-2012  Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- */
-
-#include <ust-dlfcn.h>
-#include <unistd.h>
-#include <stdio.h>
-#include <signal.h>
-#include <sched.h>
-#include <stdarg.h>
-#include <errno.h>
-
-#include <lttng/ust-fork.h>
-
-pid_t fork(void)
-{
-	static pid_t (*plibc_func)(void) = NULL;
-	sigset_t sigset;
-	pid_t retval;
-	int saved_errno;
-
-	if (plibc_func == NULL) {
-		plibc_func = dlsym(RTLD_NEXT, "fork");
-		if (plibc_func == NULL) {
-			fprintf(stderr, "libustfork: unable to find \"fork\" symbol\n");
-			errno = ENOSYS;
-			return -1;
-		}
-	}
-
-	lttng_ust_before_fork(&sigset);
-	/* Do the real fork */
-	retval = plibc_func();
-	saved_errno = errno;
-	if (retval == 0) {
-		/* child */
-		lttng_ust_after_fork_child(&sigset);
-	} else {
-		lttng_ust_after_fork_parent(&sigset);
-	}
-	errno = saved_errno;
-	return retval;
-}
-
-int daemon(int nochdir, int noclose)
-{
-	static int (*plibc_func)(int nochdir, int noclose) = NULL;
-	sigset_t sigset;
-	int retval;
-	int saved_errno;
-
-	if (plibc_func == NULL) {
-		plibc_func = dlsym(RTLD_NEXT, "daemon");
-		if (plibc_func == NULL) {
-			fprintf(stderr, "libustfork: unable to find \"daemon\" symbol\n");
-			errno = ENOSYS;
-			return -1;
-		}
-	}
-
-	lttng_ust_before_fork(&sigset);
-	/* Do the real daemon call */
-	retval = plibc_func(nochdir, noclose);
-	saved_errno = errno;
-	if (retval == 0) {
-		/* child, parent called _exit() directly */
-		lttng_ust_after_fork_child(&sigset);
-	} else {
-		/* on error in the parent */
-		lttng_ust_after_fork_parent(&sigset);
-	}
-	errno = saved_errno;
-	return retval;
-}
-
-int setuid(uid_t uid)
-{
-	static int (*plibc_func)(uid_t uid) = NULL;
-	int retval;
-	int saved_errno;
-
-	if (plibc_func == NULL) {
-		plibc_func = dlsym(RTLD_NEXT, "setuid");
-		if (plibc_func == NULL) {
-			fprintf(stderr, "libustfork: unable to find \"setuid\" symbol\n");
-			errno = ENOSYS;
-			return -1;
-		}
-	}
-
-	/* Do the real setuid */
-	retval = plibc_func(uid);
-	saved_errno = errno;
-
-	lttng_ust_after_setuid();
-
-	errno = saved_errno;
-	return retval;
-}
-
-int setgid(gid_t gid)
-{
-	static int (*plibc_func)(gid_t gid) = NULL;
-	int retval;
-	int saved_errno;
-
-	if (plibc_func == NULL) {
-		plibc_func = dlsym(RTLD_NEXT, "setgid");
-		if (plibc_func == NULL) {
-			fprintf(stderr, "libustfork: unable to find \"setgid\" symbol\n");
-			errno = ENOSYS;
-			return -1;
-		}
-	}
-
-	/* Do the real setgid */
-	retval = plibc_func(gid);
-	saved_errno = errno;
-
-	lttng_ust_after_setgid();
-
-	errno = saved_errno;
-	return retval;
-}
-
-int seteuid(uid_t euid)
-{
-	static int (*plibc_func)(uid_t euid) = NULL;
-	int retval;
-	int saved_errno;
-
-	if (plibc_func == NULL) {
-		plibc_func = dlsym(RTLD_NEXT, "seteuid");
-		if (plibc_func == NULL) {
-			fprintf(stderr, "libustfork: unable to find \"seteuid\" symbol\n");
-			errno = ENOSYS;
-			return -1;
-		}
-	}
-
-	/* Do the real seteuid */
-	retval = plibc_func(euid);
-	saved_errno = errno;
-
-	lttng_ust_after_seteuid();
-
-	errno = saved_errno;
-	return retval;
-}
-
-int setegid(gid_t egid)
-{
-	static int (*plibc_func)(gid_t egid) = NULL;
-	int retval;
-	int saved_errno;
-
-	if (plibc_func == NULL) {
-		plibc_func = dlsym(RTLD_NEXT, "setegid");
-		if (plibc_func == NULL) {
-			fprintf(stderr, "libustfork: unable to find \"setegid\" symbol\n");
-			errno = ENOSYS;
-			return -1;
-		}
-	}
-
-	/* Do the real setegid */
-	retval = plibc_func(egid);
-	saved_errno = errno;
-
-	lttng_ust_after_setegid();
-
-	errno = saved_errno;
-	return retval;
-}
-
-int setreuid(uid_t ruid, uid_t euid)
-{
-	static int (*plibc_func)(uid_t ruid, uid_t euid) = NULL;
-	int retval;
-	int saved_errno;
-
-	if (plibc_func == NULL) {
-		plibc_func = dlsym(RTLD_NEXT, "setreuid");
-		if (plibc_func == NULL) {
-			fprintf(stderr, "libustfork: unable to find \"setreuid\" symbol\n");
-			errno = ENOSYS;
-			return -1;
-		}
-	}
-
-	/* Do the real setreuid */
-	retval = plibc_func(ruid, euid);
-	saved_errno = errno;
-
-	lttng_ust_after_setreuid();
-
-	errno = saved_errno;
-	return retval;
-}
-
-int setregid(gid_t rgid, gid_t egid)
-{
-	static int (*plibc_func)(gid_t rgid, gid_t egid) = NULL;
-	int retval;
-	int saved_errno;
-
-	if (plibc_func == NULL) {
-		plibc_func = dlsym(RTLD_NEXT, "setregid");
-		if (plibc_func == NULL) {
-			fprintf(stderr, "libustfork: unable to find \"setregid\" symbol\n");
-			errno = ENOSYS;
-			return -1;
-		}
-	}
-
-	/* Do the real setregid */
-	retval = plibc_func(rgid, egid);
-	saved_errno = errno;
-
-	lttng_ust_after_setregid();
-
-	errno = saved_errno;
-	return retval;
-}
-
-#ifdef __linux__
-
-struct user_desc;
-
-struct ustfork_clone_info {
-	int (*fn)(void *);
-	void *arg;
-	sigset_t sigset;
-};
-
-static int clone_fn(void *arg)
-{
-	struct ustfork_clone_info *info = (struct ustfork_clone_info *) arg;
-
-	/* clone is now done and we are in child */
-	lttng_ust_after_fork_child(&info->sigset);
-	return info->fn(info->arg);
-}
-
-int clone(int (*fn)(void *), void *child_stack, int flags, void *arg, ...)
-{
-	static int (*plibc_func)(int (*fn)(void *), void *child_stack,
-			int flags, void *arg, pid_t *ptid,
-			struct user_desc *tls, pid_t *ctid) = NULL;
-	/* var args */
-	pid_t *ptid;
-	struct user_desc *tls;
-	pid_t *ctid;
-	/* end of var args */
-	va_list ap;
-	int retval;
-	int saved_errno;
-
-	va_start(ap, arg);
-	ptid = va_arg(ap, pid_t *);
-	tls = va_arg(ap, struct user_desc *);
-	ctid = va_arg(ap, pid_t *);
-	va_end(ap);
-
-	if (plibc_func == NULL) {
-		plibc_func = dlsym(RTLD_NEXT, "clone");
-		if (plibc_func == NULL) {
-			fprintf(stderr, "libustfork: unable to find \"clone\" symbol.\n");
-			errno = ENOSYS;
-			return -1;
-		}
-	}
-
-	if (flags & CLONE_VM) {
-		/*
-		 * Creating a thread, no need to intervene, just pass on
-		 * the arguments.
-		 */
-		retval = plibc_func(fn, child_stack, flags, arg, ptid,
-				tls, ctid);
-		saved_errno = errno;
-	} else {
-		/* Creating a real process, we need to intervene. */
-		struct ustfork_clone_info info = { .fn = fn, .arg = arg };
-
-		lttng_ust_before_fork(&info.sigset);
-		retval = plibc_func(clone_fn, child_stack, flags, &info,
-				ptid, tls, ctid);
-		saved_errno = errno;
-		/* The child doesn't get here. */
-		lttng_ust_after_fork_parent(&info.sigset);
-	}
-	errno = saved_errno;
-	return retval;
-}
-
-int setns(int fd, int nstype)
-{
-	static int (*plibc_func)(int fd, int nstype) = NULL;
-	int retval;
-	int saved_errno;
-
-	if (plibc_func == NULL) {
-		plibc_func = dlsym(RTLD_NEXT, "setns");
-		if (plibc_func == NULL) {
-			fprintf(stderr, "libustfork: unable to find \"setns\" symbol\n");
-			errno = ENOSYS;
-			return -1;
-		}
-	}
-
-	/* Do the real setns */
-	retval = plibc_func(fd, nstype);
-	saved_errno = errno;
-
-	lttng_ust_after_setns();
-
-	errno = saved_errno;
-	return retval;
-}
-
-int unshare(int flags)
-{
-	static int (*plibc_func)(int flags) = NULL;
-	int retval;
-	int saved_errno;
-
-	if (plibc_func == NULL) {
-		plibc_func = dlsym(RTLD_NEXT, "unshare");
-		if (plibc_func == NULL) {
-			fprintf(stderr, "libustfork: unable to find \"unshare\" symbol\n");
-			errno = ENOSYS;
-			return -1;
-		}
-	}
-
-	/* Do the real setns */
-	retval = plibc_func(flags);
-	saved_errno = errno;
-
-	lttng_ust_after_unshare();
-
-	errno = saved_errno;
-	return retval;
-}
-
-int setresuid(uid_t ruid, uid_t euid, uid_t suid)
-{
-	static int (*plibc_func)(uid_t ruid, uid_t euid, uid_t suid) = NULL;
-	int retval;
-	int saved_errno;
-
-	if (plibc_func == NULL) {
-		plibc_func = dlsym(RTLD_NEXT, "setresuid");
-		if (plibc_func == NULL) {
-			fprintf(stderr, "libustfork: unable to find \"setresuid\" symbol\n");
-			errno = ENOSYS;
-			return -1;
-		}
-	}
-
-	/* Do the real setresuid */
-	retval = plibc_func(ruid, euid, suid);
-	saved_errno = errno;
-
-	lttng_ust_after_setresuid();
-
-	errno = saved_errno;
-	return retval;
-}
-
-int setresgid(gid_t rgid, gid_t egid, gid_t sgid)
-{
-	static int (*plibc_func)(gid_t rgid, gid_t egid, gid_t sgid) = NULL;
-	int retval;
-	int saved_errno;
-
-	if (plibc_func == NULL) {
-		plibc_func = dlsym(RTLD_NEXT, "setresgid");
-		if (plibc_func == NULL) {
-			fprintf(stderr, "libustfork: unable to find \"setresgid\" symbol\n");
-			errno = ENOSYS;
-			return -1;
-		}
-	}
-
-	/* Do the real setresgid */
-	retval = plibc_func(rgid, egid, sgid);
-	saved_errno = errno;
-
-	lttng_ust_after_setresgid();
-
-	errno = saved_errno;
-	return retval;
-}
-
-#elif defined (__FreeBSD__)
-
-pid_t rfork(int flags)
-{
-	static pid_t (*plibc_func)(void) = NULL;
-	sigset_t sigset;
-	pid_t retval;
-	int saved_errno;
-
-	if (plibc_func == NULL) {
-		plibc_func = dlsym(RTLD_NEXT, "rfork");
-		if (plibc_func == NULL) {
-			fprintf(stderr, "libustfork: unable to find \"rfork\" symbol\n");
-			errno = ENOSYS;
-			return -1;
-		}
-	}
-
-	lttng_ust_before_fork(&sigset);
-	/* Do the real rfork */
-	retval = plibc_func();
-	saved_errno = errno;
-	if (retval == 0) {
-		/* child */
-		lttng_ust_after_fork_child(&sigset);
-	} else {
-		lttng_ust_after_fork_parent(&sigset);
-	}
-	errno = saved_errno;
-	return retval;
-}
-
-/*
- * On BSD, no need to override vfork, because it runs in the context of
- * the parent, with parent waiting until execve or exit is executed in
- * the child.
- */
-
-#else
-#warning "Unknown OS. You might want to ensure that fork/clone/vfork/fork handling is complete."
-#endif