Date: Mon, 26 Apr 2010 14:43:28 GMT From: Jonathan Anderson <jona@FreeBSD.org> To: Perforce Change Reviews <perforce@FreeBSD.org> Subject: PERFORCE change 177354 for review Message-ID: <201004261443.o3QEhSL3032873@repoman.freebsd.org>
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http://p4web.freebsd.org/@@177354?ac=10 Change 177354 by jona@jona-belle-freebsd8 on 2010/04/26 14:42:36 Allow objects to be loaded by FD number instead of name Affected files ... .. //depot/projects/trustedbsd/capabilities/src/libexec/rtld-elf/rtld.c#43 edit Differences ... ==== //depot/projects/trustedbsd/capabilities/src/libexec/rtld-elf/rtld.c#43 (text+ko) ==== @@ -1703,17 +1703,22 @@ return obj; #ifdef IN_RTLD_CAP - if (strchr(name, '/') != NULL) { - _rtld_error("Absolute paths to shared objects not supported \"%s\"", name); - return NULL; - } + path = xstrdup(name); /* is the name actually a file descriptor? */ - long long long_fd = strtonum(name, 0, 10000, NULL); - fd = (int) long_fd; - if (fstat(fd, &sb) == -1) { - /* if not, search the library path */ - path = xstrdup(name); + long long long_fd = strtonum(path, 0, __INT_MAX, NULL); + if ((long_fd >= 0) && (fstat((int) long_fd, &sb) == 0)) + fd = (int) long_fd; + + /* if not, search the library path */ + else { + dbg("preload by name: %s", name); + if (strchr(name, '/') != NULL) { + _rtld_error("Absolute paths (e.g. \"%s\") not supported", path); + free(path); + return NULL; + } + if ((fd = find_library_fd(path)) < 0) { _rtld_error("Unable to find \"%s\" in LD_LIBRARY_DIRS", path); free(path); @@ -1791,7 +1796,7 @@ if (dangerous_ld_env) { if (fstatfs(fd, &fs) != 0) { _rtld_error("Cannot fstatfs \"%s\"", path); - return NULL; + return NULL; } if (fs.f_flags & MNT_NOEXEC) { _rtld_error("Cannot execute objects on %s\n", fs.f_mntonname);
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