summaryrefslogtreecommitdiffstats
path: root/lib/readline/shell.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/readline/shell.c')
-rw-r--r--lib/readline/shell.c214
1 files changed, 214 insertions, 0 deletions
diff --git a/lib/readline/shell.c b/lib/readline/shell.c
new file mode 100644
index 0000000..36c9148
--- /dev/null
+++ b/lib/readline/shell.c
@@ -0,0 +1,214 @@
+/* shell.c -- readline utility functions that are normally provided by
+ bash when readline is linked as part of the shell. */
+
+/* Copyright (C) 1997-2009,2017,2021 Free Software Foundation, Inc.
+
+ This file is part of the GNU Readline Library (Readline), a library
+ for reading lines of text with interactive input and history editing.
+
+ Readline is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ Readline is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with Readline. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#define READLINE_LIBRARY
+
+#if defined (HAVE_CONFIG_H)
+# include <config.h>
+#endif
+
+#include <sys/types.h>
+
+#if defined (HAVE_UNISTD_H)
+# include <unistd.h>
+#endif /* HAVE_UNISTD_H */
+
+#if defined (HAVE_STDLIB_H)
+# include <stdlib.h>
+#else
+# include "ansi_stdlib.h"
+#endif /* HAVE_STDLIB_H */
+
+#if defined (HAVE_STRING_H)
+# include <string.h>
+#else
+# include <strings.h>
+#endif /* !HAVE_STRING_H */
+
+#if defined (HAVE_LIMITS_H)
+# include <limits.h>
+#endif
+
+#if defined (HAVE_FCNTL_H)
+#include <fcntl.h>
+#endif
+#if defined (HAVE_PWD_H)
+#include <pwd.h>
+#endif
+
+#include <stdio.h>
+
+#include "rlstdc.h"
+#include "rlshell.h"
+#include "rldefs.h"
+
+#include "xmalloc.h"
+
+#if defined (HAVE_GETPWUID) && !defined (HAVE_GETPW_DECLS)
+extern struct passwd *getpwuid (uid_t);
+#endif /* HAVE_GETPWUID && !HAVE_GETPW_DECLS */
+
+#ifndef NULL
+# define NULL 0
+#endif
+
+#ifndef CHAR_BIT
+# define CHAR_BIT 8
+#endif
+
+/* Nonzero if the integer type T is signed. */
+#define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
+
+/* Bound on length of the string representing an integer value of type T.
+ Subtract one for the sign bit if T is signed;
+ 302 / 1000 is log10 (2) rounded up;
+ add one for integer division truncation;
+ add one more for a minus sign if t is signed. */
+#define INT_STRLEN_BOUND(t) \
+ ((sizeof (t) * CHAR_BIT - TYPE_SIGNED (t)) * 302 / 1000 \
+ + 1 + TYPE_SIGNED (t))
+
+/* All of these functions are resolved from bash if we are linking readline
+ as part of bash. */
+
+/* Does shell-like quoting using single quotes. */
+char *
+sh_single_quote (char *string)
+{
+ register int c;
+ char *result, *r, *s;
+
+ result = (char *)xmalloc (3 + (4 * strlen (string)));
+ r = result;
+ *r++ = '\'';
+
+ for (s = string; s && (c = *s); s++)
+ {
+ *r++ = c;
+
+ if (c == '\'')
+ {
+ *r++ = '\\'; /* insert escaped single quote */
+ *r++ = '\'';
+ *r++ = '\''; /* start new quoted string */
+ }
+ }
+
+ *r++ = '\'';
+ *r = '\0';
+
+ return (result);
+}
+
+/* Set the environment variables LINES and COLUMNS to lines and cols,
+ respectively. */
+static char setenv_buf[INT_STRLEN_BOUND (int) + 1];
+static char putenv_buf1[INT_STRLEN_BOUND (int) + 6 + 1]; /* sizeof("LINES=") == 6 */
+static char putenv_buf2[INT_STRLEN_BOUND (int) + 8 + 1]; /* sizeof("COLUMNS=") == 8 */
+
+void
+sh_set_lines_and_columns (int lines, int cols)
+{
+#if defined (HAVE_SETENV)
+ sprintf (setenv_buf, "%d", lines);
+ setenv ("LINES", setenv_buf, 1);
+
+ sprintf (setenv_buf, "%d", cols);
+ setenv ("COLUMNS", setenv_buf, 1);
+#else /* !HAVE_SETENV */
+# if defined (HAVE_PUTENV)
+ sprintf (putenv_buf1, "LINES=%d", lines);
+ putenv (putenv_buf1);
+
+ sprintf (putenv_buf2, "COLUMNS=%d", cols);
+ putenv (putenv_buf2);
+# endif /* HAVE_PUTENV */
+#endif /* !HAVE_SETENV */
+}
+
+char *
+sh_get_env_value (const char *varname)
+{
+ return ((char *)getenv (varname));
+}
+
+char *
+sh_get_home_dir (void)
+{
+ static char *home_dir = (char *)NULL;
+ struct passwd *entry;
+
+ if (home_dir)
+ return (home_dir);
+
+ home_dir = (char *)NULL;
+#if defined (HAVE_GETPWUID)
+# if defined (__TANDEM)
+ entry = getpwnam (getlogin ());
+# else
+ entry = getpwuid (getuid ());
+# endif
+ if (entry)
+ home_dir = savestring (entry->pw_dir);
+#endif
+
+#if defined (HAVE_GETPWENT)
+ endpwent (); /* some systems need this */
+#endif
+
+ return (home_dir);
+}
+
+#if !defined (O_NDELAY)
+# if defined (FNDELAY)
+# define O_NDELAY FNDELAY
+# endif
+#endif
+
+int
+sh_unset_nodelay_mode (int fd)
+{
+#if defined (HAVE_FCNTL)
+ int flags, bflags;
+
+ if ((flags = fcntl (fd, F_GETFL, 0)) < 0)
+ return -1;
+
+ bflags = 0;
+
+#ifdef O_NONBLOCK
+ bflags |= O_NONBLOCK;
+#endif
+
+#ifdef O_NDELAY
+ bflags |= O_NDELAY;
+#endif
+
+ if (flags & bflags)
+ {
+ flags &= ~bflags;
+ return (fcntl (fd, F_SETFL, flags));
+ }
+#endif
+
+ return 0;
+}