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libredirect: add support for openat and dlopen

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gobject-introspection uses glib’s g_module_open function, which in turn relies
on dlopen. I also implemented openat, since I initially thought this function
was used but turns out dlopen uses the openat signal directly. We might as
well keep it, even thought I do not need it at the moment.
This commit is contained in:
Jan Tojnar 2019-04-20 03:02:44 +02:00
parent cd8697da9f
commit 90f3a237eb
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GPG key ID: 7FAB2A15F7A607A4
1 changed files with 21 additions and 0 deletions
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21
pkgs/build-support/libredirect/libredirect.c
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@ -91,6 +91,20 @@ int open64(const char * path, int flags, ...)
return open64_real(rewrite(path, buf), flags, mode);
}
int openat(int dirfd, const char * path, int flags, ...)
{
int (*openat_real) (int, const char *, int, mode_t) = dlsym(RTLD_NEXT, "openat");
mode_t mode = 0;
if (flags & O_CREAT) {
va_list ap;
va_start(ap, flags);
mode = va_arg(ap, mode_t);
va_end(ap);
}
char buf[PATH_MAX];
return openat_real(dirfd, rewrite(path, buf), flags, mode);
}
FILE * fopen(const char * path, const char * mode)
{
FILE * (*fopen_real) (const char *, const char *) = dlsym(RTLD_NEXT, "fopen");
@ -152,3 +166,10 @@ int execv(const char *path, char *const argv[])
char buf[PATH_MAX];
return execv_real(rewrite(path, buf), argv);
}
void *dlopen(const char *filename, int flag)
{
void * (*__dlopen_real) (const char *, int) = dlsym(RTLD_NEXT, "dlopen");
char buf[PATH_MAX];
return __dlopen_real(rewrite(filename, buf), flag);
}