Initial import

.gitignore

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+*swp
+*.o
+*.so*

Makefile

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+include version.mk
+
+SUBDIRS = src lib
+.PHONY: subdirs $(SUBDIRS)
+
+all: build
+
+lib: src
+
+subdirs: clean $(SUBDIRS)
+$(SUBDIRS):
+	$(MAKE) -C $@ build
+
+clean:
+	rm -fv lib/*so*
+	make -C src clean
+
+build: subdirs
+
+install: subdirs
+	mkdir -p $(DESTDIR)/usr/include $(DESTDIR)/usr/lib
+	cp -r lib/*so*  $(DESTDIR)/usr/lib/

include/open.h

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+/*
+ * Copyright (c) 2011 Paul Tagliamonte <paultag@debian.org>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <sys/stat.h>
+
+#ifndef _OPEN_H_
+#define _OPEN_H_ I_CAN_HAS
+
+int open (const char * pathname, int flags, ...);
+
+int creat(const char *pathname, mode_t mode);
+FILE *fopen(const char *path, const char *mode);
+FILE *freopen(const char *path, const char *mode, FILE *stream);
+
+#endif

lib/Makefile

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+include ../version.mk
+
+build:
+	ln -s libtmperamental.so.$(LIB_MAJOR).$(LIB_MINOR) \
+		libtmperamental.so.$(LIB_MAJOR)
+	ln -s libtmperamental.so.$(LIB_MAJOR).$(LIB_MINOR) \
+		libtmperamental.so

src/Makefile

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+include ../version.mk
+
+LIB=../lib/
+INC=../include/
+
+TARGETS=$(shell ls *.c | sed s/.c$$/.o/g)
+CFLAGS=-Wall -c -fPIC -I$(INC)  # FIXME
+CC=gcc  # FIXME
+
+LDFLAGS=-shared \
+		-Wl,--no-as-needed \
+		-ldl \
+		-Wl,-soname,$(LIB_NAME).so.$(LIB_MAJOR).$(LIB_MINOR)
+
+OUTPUT=$(LIB)$(LIB_NAME).so.$(LIB_MAJOR).$(LIB_MINOR)
+
+build: $(TARGETS) link
+
+clean:
+	rm -f *.o
+	rm -f $(OUTPUT)
+
+.c.o:
+	$(CC) $(CFLAGS) -c -o $@ $<
+
+link:
+	$(CC) $(LDFLAGS) $(TARGETS) -o $(OUTPUT)

src/open.c

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+/*
+ * Copyright (c) 2011 Paul Tagliamonte <paultag@debian.org>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#define _GNU_SOURCE 1
+/* This horseshit hack brought to you by the fine folks over at wherever
+ * the fuck this came from. This breaks in Cygwin. Not that that really
+ * matters in this small case. */
+
+#include <dlfcn.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <malloc.h>
+
+#include "open.h"
+
+void enforcer ( const char * pathname ) {
+    const char * to_check = "/tmp/";
+    int len = strlen(to_check);
+    char * leading = malloc(sizeof(char) * len);
+    strncpy(leading, pathname, len);
+    if ( strcmp(to_check, leading) == 0 ) {
+        printf("tmperamental: caught a write to /tmp.\n");
+    }
+}
+
+int open ( const char * pathname, int flags, ... ) {
+    enforcer( pathname );
+
+    va_list v;
+    va_start(v, flags);
+    mode_t mode = va_arg(v, mode_t);
+    va_end(v);
+    if ( mode ) {
+        int (*orig_addr)(const char *, int, mode_t) = dlsym(RTLD_NEXT, "open");
+        return orig_addr(pathname, flags, mode);
+    } else {
+        int (*orig_addr)(const char *, int) = dlsym(RTLD_NEXT, "open");
+        return orig_addr(pathname, flags);
+    }
+}
+
+int creat ( const char *pathname, mode_t mode ) {
+    enforcer( pathname );
+
+    int (*orig_addr)(const char *, mode_t) = dlsym(RTLD_NEXT, "creat");
+    return orig_addr(pathname, mode);
+}
+
+FILE * fopen ( const char * path, const char *mode ) {
+    enforcer( path );
+
+    FILE * (*orig_addr)(const char *, const char *) = dlsym(RTLD_NEXT, "fopen");
+    return orig_addr(path, mode);
+}
+
+FILE * freopen ( const char *path, const char *mode, FILE * stream ) {
+    enforcer( path );
+
+    FILE * (*orig_addr)(const char *, const char *, FILE *)
+        = dlsym(RTLD_NEXT, "freopen");
+    return orig_addr(path, mode, stream);
+}

version.mk

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+LIB_NAME = libtmperamental
+LIB_MAJOR = 1
+LIB_MINOR = 0
+LIB_PATCH = 0