66 lines
1.8 KiB
C
66 lines
1.8 KiB
C
/* Spotify looks for its theme data in /usr/share/spotify/theme. This
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LD_PRELOAD library intercepts open() and stat() calls to redirect
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them to the corresponding location in $out. */
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#define _GNU_SOURCE
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#include <stdio.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <dlfcn.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <limits.h>
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char themeDir [] = "/usr/share/spotify/theme";
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char realThemeDir [] = OUT "/share/spotify/theme";
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const char * rewrite(const char * path, char * buf)
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{
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if (strncmp(path, themeDir, sizeof(themeDir) - 1) != 0) return path;
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if (snprintf(buf, PATH_MAX, "%s%s", realThemeDir, path + sizeof(themeDir) - 1) >= PATH_MAX)
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abort();
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return buf;
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}
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int open(const char *path, int flags, ...)
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{
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char buf[PATH_MAX];
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int (*_open) (const char *, int, mode_t) = dlsym(RTLD_NEXT, "open");
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mode_t mode = 0;
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if (flags & O_CREAT) {
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va_list ap;
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va_start(ap, flags);
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mode = va_arg(ap, mode_t);
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va_end(ap);
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}
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return _open(rewrite(path, buf), flags, mode);
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}
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int open64(const char *path, int flags, ...)
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{
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char buf[PATH_MAX];
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int (*_open64) (const char *, int, mode_t) = dlsym(RTLD_NEXT, "open64");
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mode_t mode = 0;
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if (flags & O_CREAT) {
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va_list ap;
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va_start(ap, flags);
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mode = va_arg(ap, mode_t);
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va_end(ap);
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}
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return _open64(rewrite(path, buf), flags, mode);
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}
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int __xstat64(int ver, const char *path, struct stat64 *st)
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{
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char buf[PATH_MAX];
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int (*___xstat64) (int ver, const char *, struct stat64 *) = dlsym(RTLD_NEXT, "__xstat64");
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return ___xstat64(ver, rewrite(path, buf), st);
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}
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int access(const char *path, int mode)
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{
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char buf[PATH_MAX];
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int (*_access) (const char *path, int mode) = dlsym(RTLD_NEXT, "access");
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return _access(rewrite(path, buf), mode);
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}
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