From daad709a7c13c0fac73e407528f96cc876c09629 Mon Sep 17 00:00:00 2001 From: "Yann E. MORIN" Date: Sun, 28 Aug 2016 17:26:42 +0200 Subject: missing.h: add missing definitions for __O_TMPFILE Currently, a missing __O_TMPFILE was only defined for i386 and x86_64, leaving any other architectures with an "old" toolchain fail miserably at build time: src/import/export-raw.c: In function 'reflink_snapshot': src/import/export-raw.c:271:26: error: 'O_TMPFILE' undeclared (first use in this function) new_fd = open(d, O_TMPFILE|O_CLOEXEC|O_NOCTTY|O_RDWR, 0600); ^ __O_TMPFILE (and O_TMPFILE) are available since glibc 2.19. However, a lot of existing toolchains are still using glibc-2.18, and some even before that, and it is not really possible to update those toolchains. Instead of defining it only for i386 and x86_64, define __O_TMPFILE with the specific values for those archs where it is different from the generic value. Use the values as found in the Linux kernel (v4.8-rc3, current as of time of commit). --- Note: tested on ARM (build+run), with glibc-2.18 and linux headers 3.12. Untested on other archs, though (I have no board to test this). Changes v1 -> v2: - add a comment specifying some are hexa, others are octal. --- src/basic/missing.h | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) (limited to 'src/basic') diff --git a/src/basic/missing.h b/src/basic/missing.h index f8e096605e..13ff51cd35 100644 --- a/src/basic/missing.h +++ b/src/basic/missing.h @@ -537,12 +537,21 @@ struct btrfs_ioctl_quota_ctl_args { # define DRM_IOCTL_DROP_MASTER _IO('d', 0x1f) #endif -#if defined(__i386__) || defined(__x86_64__) - -/* The precise definition of __O_TMPFILE is arch specific, so let's - * just define this on x86 where we know the value. */ +/* The precise definition of __O_TMPFILE is arch specific; use the + * values defined by the kernel (note: some are hexa, some are octal, + * duplicated as-is from the kernel definitions): + * - alpha, parisc, sparc: each has a specific value; + * - others: they use the "generic" value. + */ #ifndef __O_TMPFILE +#if defined(__alpha__) +#define __O_TMPFILE 0100000000 +#elif defined(__parisc__) || defined(__hppa__) +#define __O_TMPFILE 0400000000 +#elif defined(__sparc__) || defined(__sparc64__) +#define __O_TMPFILE 0x2000000 +#else #define __O_TMPFILE 020000000 #endif -- cgit v1.2.3-54-g00ecf From 1d9ed171788821c21ca900a921833a8e41bf22f3 Mon Sep 17 00:00:00 2001 From: "Yann E. MORIN" Date: Mon, 29 Aug 2016 12:34:50 +0200 Subject: basic/fileio: we always have O_TMPFILE now fileio makes use of O_TMPFILE when it is available. We now always have O_TMPFILE, defined in missing.h if missing from the toolchain headers. Have fileio include missing.h and drop the guards around the use of O_TMPFILE. --- src/basic/fileio.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) (limited to 'src/basic') diff --git a/src/basic/fileio.c b/src/basic/fileio.c index d642f3daea..a5920e7d36 100644 --- a/src/basic/fileio.c +++ b/src/basic/fileio.c @@ -37,6 +37,7 @@ #include "hexdecoct.h" #include "log.h" #include "macro.h" +#include "missing.h" #include "parse-util.h" #include "path-util.h" #include "random-util.h" @@ -1280,12 +1281,10 @@ int open_tmpfile_unlinkable(const char *directory, int flags) { /* Returns an unlinked temporary file that cannot be linked into the file system anymore */ -#ifdef O_TMPFILE /* Try O_TMPFILE first, if it is supported */ fd = open(directory, flags|O_TMPFILE|O_EXCL, S_IRUSR|S_IWUSR); if (fd >= 0) return fd; -#endif /* Fall back to unguessable name + unlinking */ p = strjoina(directory, "/systemd-tmp-XXXXXX"); @@ -1313,7 +1312,6 @@ int open_tmpfile_linkable(const char *target, int flags, char **ret_path) { * which case "ret_path" will be returned as NULL. If not possible a the tempoary path name used is returned in * "ret_path". Use link_tmpfile() below to rename the result after writing the file in full. */ -#ifdef O_TMPFILE { _cleanup_free_ char *dn = NULL; @@ -1329,7 +1327,6 @@ int open_tmpfile_linkable(const char *target, int flags, char **ret_path) { log_debug_errno(errno, "Failed to use O_TMPFILE on %s: %m", dn); } -#endif r = tempfn_random(target, NULL, &tmp); if (r < 0) -- cgit v1.2.3-54-g00ecf