Adding upstream version 2:4.17.12+dfsg.upstream/2%4.17.12+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 325 insertions, 0 deletions

diff --git a/third_party/heimdal/lib/roken/simple_exec.c b/third_party/heimdal/lib/roken/simple_exec.c
new file mode 100644
index 0000000..552e121
--- /dev/null
+++ b/third_party/heimdal/lib/roken/simple_exec.c
@@ -0,0 +1,325 @@
+/*
+ * Copyright (c) 1998 - 2001, 2004 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <config.h>
+
+#include <stdarg.h>
+#include <stdlib.h>
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_WAIT_H
+#include <sys/wait.h>
+#endif
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <errno.h>
+
+#include "roken.h"
+
+#define EX_NOEXEC	126
+#define EX_NOTFOUND	127
+
+/* return values:
+   SE_E_UNSPECIFIED   on `unspecified' system errors
+   SE_E_FORKFAILED    on fork failures
+   SE_E_WAITPIDFAILED on waitpid errors
+   SE_E_EXECTIMEOUT   exec timeout
+   0-   is return value from subprocess
+   SE_E_NOEXEC        if the program couldn't be executed
+   SE_E_NOTFOUND      if the program couldn't be found
+   128- is 128 + signal that killed subprocess
+
+   possible values `func' can return:
+   ((time_t)-2)		exit loop w/o killing child and return
+   			`exec timeout'/-4 from simple_exec
+   ((time_t)-1)		kill child with SIGTERM and wait for child to exit
+   0			don't timeout again
+   n			seconds to next timeout
+   */
+
+static int sig_alarm;
+
+static RETSIGTYPE
+sigtimeout(int sig)
+{
+    sig_alarm = 1;
+    SIGRETURN(0);
+}
+
+ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
+wait_for_process_timed(pid_t pid, time_t (*func)(void *),
+		       void *ptr, time_t timeout)
+{
+    RETSIGTYPE (*old_func)(int sig) = NULL;
+    unsigned int oldtime = 0;
+    int ret;
+
+    sig_alarm = 0;
+
+    if (func) {
+	old_func = signal(SIGALRM, sigtimeout);
+	oldtime = alarm(timeout);
+    }
+
+    while(1) {
+	int status;
+
+	while(waitpid(pid, &status, 0) < 0) {
+	    if (errno != EINTR) {
+		ret = SE_E_WAITPIDFAILED;
+		goto out;
+	    }
+	    if (func == NULL)
+		continue;
+	    if (sig_alarm == 0)
+		continue;
+	    timeout = (*func)(ptr);
+	    if (timeout == (time_t)-1) {
+		kill(pid, SIGTERM);
+		continue;
+	    } else if (timeout == (time_t)-2) {
+		ret = SE_E_EXECTIMEOUT;
+		goto out;
+	    }
+	    alarm(timeout);
+	}
+	if(WIFSTOPPED(status))
+	    continue;
+	if(WIFEXITED(status)) {
+	    ret = WEXITSTATUS(status);
+	    break;
+	}
+	if(WIFSIGNALED(status)) {
+	    ret = WTERMSIG(status) + 128;
+	    break;
+	}
+    }
+ out:
+    if (func) {
+	signal(SIGALRM, old_func);
+	alarm(oldtime);
+    }
+    return ret;
+}
+
+ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
+wait_for_process(pid_t pid)
+{
+    return wait_for_process_timed(pid, NULL, NULL, 0);
+}
+
+ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
+pipe_execv(FILE **stdin_fd, FILE **stdout_fd, FILE **stderr_fd,
+	   const char *file, ...)
+{
+    int in_fd[2] = {-1, -1};
+    int out_fd[2] = {-1, -1};
+    int err_fd[2] = {-1, -1};
+    pid_t pid;
+    va_list ap;
+    char **argv;
+    int ret = 0;
+
+    if(stdin_fd != NULL)
+	ret = pipe(in_fd);
+    if(ret != -1 && stdout_fd != NULL)
+	ret = pipe(out_fd);
+    if(ret != -1 && stderr_fd != NULL)
+	ret = pipe(err_fd);
+
+    if (ret == -1) {
+	close(in_fd[0]);
+	close(in_fd[1]);
+	close(out_fd[0]);
+	close(out_fd[1]);
+	close(err_fd[0]);
+	close(err_fd[1]);
+	return SE_E_UNSPECIFIED;
+    }
+
+    pid = fork();
+    switch(pid) {
+    case 0:
+	va_start(ap, file);
+	argv = vstrcollect(&ap);
+	va_end(ap);
+	if(argv == NULL)
+	    exit(-1);
+
+	/* close pipes we're not interested in */
+	if(stdin_fd != NULL)
+	    close(in_fd[1]);
+	if(stdout_fd != NULL)
+	    close(out_fd[0]);
+	if(stderr_fd != NULL)
+	    close(err_fd[0]);
+
+	/* pipe everything caller doesn't care about to /dev/null */
+	if(stdin_fd == NULL)
+	    in_fd[0] = open(_PATH_DEVNULL, O_RDONLY);
+	if(stdout_fd == NULL)
+	    out_fd[1] = open(_PATH_DEVNULL, O_WRONLY);
+	if(stderr_fd == NULL)
+	    err_fd[1] = open(_PATH_DEVNULL, O_WRONLY);
+
+	/* move to proper descriptors */
+	if(in_fd[0] != STDIN_FILENO) {
+	    dup2(in_fd[0], STDIN_FILENO);
+	    close(in_fd[0]);
+	}
+	if(out_fd[1] != STDOUT_FILENO) {
+	    dup2(out_fd[1], STDOUT_FILENO);
+	    close(out_fd[1]);
+	}
+	if(err_fd[1] != STDERR_FILENO) {
+	    dup2(err_fd[1], STDERR_FILENO);
+	    close(err_fd[1]);
+	}
+
+	closefrom(3);
+
+	execv(file, argv);
+	exit((errno == ENOENT) ? EX_NOTFOUND : EX_NOEXEC);
+    case -1:
+	if(stdin_fd != NULL) {
+	    close(in_fd[0]);
+	    close(in_fd[1]);
+	}
+	if(stdout_fd != NULL) {
+	    close(out_fd[0]);
+	    close(out_fd[1]);
+	}
+	if(stderr_fd != NULL) {
+	    close(err_fd[0]);
+	    close(err_fd[1]);
+	}
+	return SE_E_FORKFAILED;
+    default:
+	if(stdin_fd != NULL) {
+	    close(in_fd[0]);
+	    *stdin_fd = fdopen(in_fd[1], "w");
+	}
+	if(stdout_fd != NULL) {
+	    close(out_fd[1]);
+	    *stdout_fd = fdopen(out_fd[0], "r");
+	}
+	if(stderr_fd != NULL) {
+	    close(err_fd[1]);
+	    *stderr_fd = fdopen(err_fd[0], "r");
+	}
+    }
+    return pid;
+}
+
+ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
+simple_execvp_timed(const char *file, char *const args[],
+		    time_t (*func)(void *), void *ptr, time_t timeout)
+{
+    pid_t pid = fork();
+    switch(pid){
+    case -1:
+	return SE_E_FORKFAILED;
+    case 0:
+	execvp(file, args);
+	exit((errno == ENOENT) ? EX_NOTFOUND : EX_NOEXEC);
+    default:
+	return wait_for_process_timed(pid, func, ptr, timeout);
+    }
+}
+
+ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
+simple_execvp(const char *file, char *const args[])
+{
+    return simple_execvp_timed(file, args, NULL, NULL, 0);
+}
+
+/* gee, I'd like a execvpe */
+ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
+simple_execve_timed(const char *file, char *const args[], char *const envp[],
+		    time_t (*func)(void *), void *ptr, time_t timeout)
+{
+    pid_t pid = fork();
+    switch(pid){
+    case -1:
+	return SE_E_FORKFAILED;
+    case 0:
+	execve(file, args, envp);
+	exit((errno == ENOENT) ? EX_NOTFOUND : EX_NOEXEC);
+    default:
+	return wait_for_process_timed(pid, func, ptr, timeout);
+    }
+}
+
+ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
+simple_execve(const char *file, char *const args[], char *const envp[])
+{
+    return simple_execve_timed(file, args, envp, NULL, NULL, 0);
+}
+
+ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
+simple_execlp(const char *file, ...)
+{
+    va_list ap;
+    char **argv;
+    int ret;
+
+    va_start(ap, file);
+    argv = vstrcollect(&ap);
+    va_end(ap);
+    if(argv == NULL)
+	return SE_E_UNSPECIFIED;
+    ret = simple_execvp(file, argv);
+    free(argv);
+    return ret;
+}
+
+ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
+simple_execle(const char *file, ... /* ,char *const envp[] */)
+{
+    va_list ap;
+    char **argv;
+    char *const* envp;
+    int ret;
+
+    va_start(ap, file);
+    argv = vstrcollect(&ap);
+    envp = va_arg(ap, char **);
+    va_end(ap);
+    if(argv == NULL)
+	return SE_E_UNSPECIFIED;
+    ret = simple_execve(file, argv, envp);
+    free(argv);
+    return ret;
+}