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-rw-r--r--src/kmk/kmkbuiltin/ln.c287
1 files changed, 287 insertions, 0 deletions
diff --git a/src/kmk/kmkbuiltin/ln.c b/src/kmk/kmkbuiltin/ln.c
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+++ b/src/kmk/kmkbuiltin/ln.c
@@ -0,0 +1,287 @@
+/*-
+ * Copyright (c) 1987, 1993, 1994
+ * The Regents of the University of California. 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.
+ * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
+ */
+
+#if 0
+#ifndef lint
+static char const copyright[] =
+"@(#) Copyright (c) 1987, 1993, 1994\n\
+ The Regents of the University of California. All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)ln.c 8.2 (Berkeley) 3/31/94";
+#endif /* not lint */
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD: src/bin/ln/ln.c,v 1.33 2005/02/09 17:37:37 ru Exp $");
+#endif /* no $id */
+
+#define FAKES_NO_GETOPT_H /* bird */
+#include "config.h"
+#ifndef _MSC_VER
+# include <sys/param.h>
+#endif
+#include <sys/stat.h>
+
+#include "err.h"
+#include <errno.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include "getopt_r.h"
+#ifdef _MSC_VER
+# include "mscfakes.h"
+#endif
+#include "kmkbuiltin.h"
+
+/*********************************************************************************************************************************
+* Structures and Typedefs *
+*********************************************************************************************************************************/
+typedef struct LNINSTANCE
+{
+ PKMKBUILTINCTX pCtx;
+ int fflag; /* Unlink existing files. */
+ int hflag; /* Check new name for symlink first. */
+ int iflag; /* Interactive mode. */
+ int sflag; /* Symbolic, not hard, link. */
+ int vflag; /* Verbose output. */
+ int (*linkf)(const char *, const char *); /* System link call. */
+ char linkch;
+} LNINSTANCE;
+typedef LNINSTANCE *PLNINSTANCE;
+
+static struct option long_options[] =
+{
+ { "help", no_argument, 0, 261 },
+ { "version", no_argument, 0, 262 },
+ { 0, 0, 0, 0 },
+};
+
+
+static int linkit(PLNINSTANCE,const char *, const char *, int);
+static int usage(PKMKBUILTINCTX, int);
+
+
+int
+kmk_builtin_ln(int argc, char **argv, char **envp, PKMKBUILTINCTX pCtx)
+{
+ LNINSTANCE This;
+ struct getopt_state_r gos;
+ struct stat sb;
+ char *sourcedir;
+ int ch, exitval;
+
+ /* initialize globals. */
+ This.pCtx = pCtx;
+ This.fflag = 0;
+ This.hflag = 0;
+ This.iflag = 0;
+ This.sflag = 0;
+ This.vflag = 0;
+ This.linkch = 0;
+ This.linkf = NULL;
+
+ getopt_initialize_r(&gos, argc, argv, "fhinsv", long_options, envp, pCtx);
+ while ((ch = getopt_long_r(&gos, NULL)) != -1)
+ switch (ch) {
+ case 'f':
+ This.fflag = 1;
+ This.iflag = 0;
+ break;
+ case 'h':
+ case 'n':
+ This.hflag = 1;
+ break;
+ case 'i':
+ This.iflag = 1;
+ This.fflag = 0;
+ break;
+ case 's':
+ This.sflag = 1;
+ break;
+ case 'v':
+ This.vflag = 1;
+ break;
+ case 261:
+ usage(pCtx, 0);
+ return 0;
+ case 262:
+ return kbuild_version(argv[0]);
+ case '?':
+ default:
+ return usage(pCtx, 1);
+ }
+
+ argv += gos.optind;
+ argc -= gos.optind;
+
+ This.linkf = This.sflag ? symlink : link;
+ This.linkch = This.sflag ? '-' : '=';
+
+ switch(argc) {
+ case 0:
+ return usage(pCtx, 1);
+ /* NOTREACHED */
+ case 1: /* ln target */
+ return linkit(&This, argv[0], ".", 1);
+ case 2: /* ln target source */
+ return linkit(&This, argv[0], argv[1], 0);
+ default:
+ ;
+ }
+ /* ln target1 target2 directory */
+ sourcedir = argv[argc - 1];
+ if (This.hflag && lstat(sourcedir, &sb) == 0 && S_ISLNK(sb.st_mode)) {
+ /*
+ * We were asked not to follow symlinks, but found one at
+ * the target--simulate "not a directory" error
+ */
+ errno = ENOTDIR;
+ return err(pCtx, 1, "st_mode: %s", sourcedir);
+ }
+ if (stat(sourcedir, &sb))
+ return err(pCtx, 1, "stat: %s", sourcedir);
+ if (!S_ISDIR(sb.st_mode))
+ return usage(pCtx, 1);
+ for (exitval = 0; *argv != sourcedir; ++argv)
+ exitval |= linkit(&This, *argv, sourcedir, 1);
+ return exitval;
+}
+
+static int
+linkit(PLNINSTANCE pThis, const char *target, const char *source, int isdir)
+{
+ struct stat sb;
+ const char *p;
+ int ch, exists, first;
+ char path[PATH_MAX];
+
+ if (!pThis->sflag) {
+ /* If target doesn't exist, quit now. */
+ if (stat(target, &sb)) {
+ warn(pThis->pCtx, "stat: %s", target);
+ return (1);
+ }
+ /* Only symbolic links to directories. */
+ if (S_ISDIR(sb.st_mode)) {
+ errno = EISDIR;
+ warn(pThis->pCtx, "st_mode: %s", target);
+ return (1);
+ }
+ }
+
+ /*
+ * If the source is a directory (and not a symlink if hflag),
+ * append the target's name.
+ */
+ if (isdir ||
+ (lstat(source, &sb) == 0 && S_ISDIR(sb.st_mode)) ||
+ (!pThis->hflag && stat(source, &sb) == 0 && S_ISDIR(sb.st_mode))) {
+#if defined(_MSC_VER) || defined(__OS2__)
+ char *p2 = strrchr(target, '\\');
+ p = strrchr(target, '/');
+ if (p2 != NULL && (p == NULL || p2 > p))
+ p = p2;
+ if (p == NULL)
+#else
+ if ((p = strrchr(target, '/')) == NULL)
+#endif
+ p = target;
+ else
+ ++p;
+ if (snprintf(path, sizeof(path), "%s/%s", source, p) >=
+ (ssize_t)sizeof(path)) {
+ errno = ENAMETOOLONG;
+ warn(pThis->pCtx, "snprintf: %s", target);
+ return (1);
+ }
+ source = path;
+ }
+
+ exists = !lstat(source, &sb);
+ /*
+ * If the file exists, then unlink it forcibly if -f was specified
+ * and interactively if -i was specified.
+ */
+ if (pThis->fflag && exists) {
+ if (unlink(source)) {
+ warn(pThis->pCtx, "unlink: %s", source);
+ return (1);
+ }
+ } else if (pThis->iflag && exists) {
+ fflush(stdout);
+ fprintf(stderr, "replace %s? ", source);
+
+ first = ch = getchar();
+ while(ch != '\n' && ch != EOF)
+ ch = getchar();
+ if (first != 'y' && first != 'Y') {
+ kmk_builtin_ctx_printf(pThis->pCtx, 1, "not replaced\n");
+ return (1);
+ }
+
+ if (unlink(source)) {
+ warn(pThis->pCtx, "unlink: %s", source);
+ return (1);
+ }
+ }
+
+ /* Attempt the link. */
+ if ((*pThis->linkf)(target, source)) {
+ warn(pThis->pCtx, "%s: %s", pThis->linkf == link ? "link" : "symlink", source);
+ return (1);
+ }
+ if (pThis->vflag)
+ kmk_builtin_ctx_printf(pThis->pCtx, 0, "%s %c> %s\n", source, pThis->linkch, target);
+ return (0);
+}
+
+static int
+usage(PKMKBUILTINCTX pCtx, int fIsErr)
+{
+ kmk_builtin_ctx_printf(pCtx,fIsErr,
+ "usage: %s [-fhinsv] source_file [target_file]\n"
+ " or: %s [-fhinsv] source_file ... target_dir\n"
+ " or: %s source_file target_file\n"
+ " or: %s --help\n"
+ " or: %s --version\n",
+ pCtx->pszProgName, pCtx->pszProgName, pCtx->pszProgName,
+ pCtx->pszProgName, pCtx->pszProgName);
+ return 1;
+}
+
+#ifdef KMK_BUILTIN_STANDALONE
+int main(int argc, char **argv, char **envp)
+{
+ KMKBUILTINCTX Ctx = { "kmk_ln", NULL };
+ return kmk_builtin_ln(argc, argv, envp, &Ctx);
+}
+#endif
+
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