Adding upstream version 15.5.upstream/15.5

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

1 files changed, 117 insertions, 0 deletions

diff --git a/src/port/system.c b/src/port/system.c
new file mode 100644
index 0000000..20a830f
--- /dev/null
+++ b/src/port/system.c
@@ -0,0 +1,117 @@
+/*-------------------------------------------------------------------------
+ *
+ * system.c
+ *	   Win32 system() and popen() replacements
+ *
+ *
+ *	Win32 needs double quotes at the beginning and end of system()
+ *	strings.  If not, it gets confused with multiple quoted strings.
+ *	It also requires double-quotes around the executable name and
+ *	any files used for redirection.  Filter other args through
+ *	appendShellString() to quote them.
+ *
+ *	Generated using Win32 "CMD /?":
+ *
+ *	1. If all of the following conditions are met, then quote characters
+ *	on the command line are preserved:
+ *
+ *	 - no /S switch
+ *	 - exactly two quote characters
+ *	 - no special characters between the two quote characters, where special
+ *	   is one of: &<>()@^|
+ *	 - there are one or more whitespace characters between the two quote
+ *	   characters
+ *	 - the string between the two quote characters is the name of an
+ *	   executable file.
+ *
+ *	 2. Otherwise, old behavior is to see if the first character is a quote
+ *	 character and if so, strip the leading character and remove the last
+ *	 quote character on the command line, preserving any text after the last
+ *	 quote character.
+ *
+ * Portions Copyright (c) 1996-2022, PostgreSQL Global Development Group
+ *
+ * src/port/system.c
+ *
+ *-------------------------------------------------------------------------
+ */
+
+#if defined(WIN32) && !defined(__CYGWIN__)
+
+#ifndef FRONTEND
+#include "postgres.h"
+#else
+#include "postgres_fe.h"
+#endif
+
+#include <fcntl.h>
+
+#undef system
+#undef popen
+
+int
+pgwin32_system(const char *command)
+{
+	size_t		cmdlen = strlen(command);
+	char	   *buf;
+	int			save_errno;
+	int			res;
+
+	/*
+	 * Create a malloc'd copy of the command string, enclosed with an extra
+	 * pair of quotes
+	 */
+	buf = malloc(cmdlen + 2 + 1);
+	if (buf == NULL)
+	{
+		errno = ENOMEM;
+		return -1;
+	}
+	buf[0] = '"';
+	memcpy(&buf[1], command, cmdlen);
+	buf[cmdlen + 1] = '"';
+	buf[cmdlen + 2] = '\0';
+
+	res = system(buf);
+
+	save_errno = errno;
+	free(buf);
+	errno = save_errno;
+
+	return res;
+}
+
+
+FILE *
+pgwin32_popen(const char *command, const char *type)
+{
+	size_t		cmdlen = strlen(command);
+	char	   *buf;
+	int			save_errno;
+	FILE	   *res;
+
+	/*
+	 * Create a malloc'd copy of the command string, enclosed with an extra
+	 * pair of quotes
+	 */
+	buf = malloc(cmdlen + 2 + 1);
+	if (buf == NULL)
+	{
+		errno = ENOMEM;
+		return NULL;
+	}
+	buf[0] = '"';
+	memcpy(&buf[1], command, cmdlen);
+	buf[cmdlen + 1] = '"';
+	buf[cmdlen + 2] = '\0';
+
+	res = _popen(buf, type);
+
+	save_errno = errno;
+	free(buf);
+	errno = save_errno;
+
+	return res;
+}
+
+#endif