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-rw-r--r--src/port/system.c117
1 files changed, 117 insertions, 0 deletions
diff --git a/src/port/system.c b/src/port/system.c
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+++ b/src/port/system.c
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+/*-------------------------------------------------------------------------
+ *
+ * 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) 1996-2021, 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