1 | /* |
1 | /* |
2 | * libeio implementation |
2 | * libeio implementation |
3 | * |
3 | * |
4 | * Copyright (c) 2007,2008,2009,2010,2011,2012,2013,2016 Marc Alexander Lehmann <libeio@schmorp.de> |
4 | * Copyright (c) 2007,2008,2009,2010,2011,2012,2013,2016,2017 Marc Alexander Lehmann <libeio@schmorp.de> |
5 | * All rights reserved. |
5 | * All rights reserved. |
6 | * |
6 | * |
7 | * Redistribution and use in source and binary forms, with or without modifica- |
7 | * Redistribution and use in source and binary forms, with or without modifica- |
8 | * tion, are permitted provided that the following conditions are met: |
8 | * tion, are permitted provided that the following conditions are met: |
9 | * |
9 | * |
… | |
… | |
231 | #define D_NAME(entp) entp.cFileName |
231 | #define D_NAME(entp) entp.cFileName |
232 | #define D_TYPE(entp) (entp.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY ? DT_DIR : DT_REG) |
232 | #define D_TYPE(entp) (entp.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY ? DT_DIR : DT_REG) |
233 | |
233 | |
234 | #else |
234 | #else |
235 | |
235 | |
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|
236 | #include <sys/ioctl.h> |
236 | #include <sys/time.h> |
237 | #include <sys/time.h> |
237 | #include <sys/select.h> |
238 | #include <sys/select.h> |
238 | #include <unistd.h> |
239 | #include <unistd.h> |
239 | #include <signal.h> |
240 | #include <signal.h> |
240 | #include <dirent.h> |
241 | #include <dirent.h> |
… | |
… | |
299 | # else |
300 | # else |
300 | # error sendfile support requested but not available |
301 | # error sendfile support requested but not available |
301 | # endif |
302 | # endif |
302 | #endif |
303 | #endif |
303 | |
304 | |
|
|
305 | #if HAVE_RENAMEAT2 |
|
|
306 | # include <sys/syscall.h> |
|
|
307 | # include <linux/fs.h> |
|
|
308 | #endif |
|
|
309 | |
304 | #ifndef D_TYPE |
310 | #ifndef D_TYPE |
305 | # define D_TYPE(de) 0 |
311 | # define D_TYPE(de) 0 |
306 | #endif |
312 | #endif |
307 | #ifndef D_INO |
313 | #ifndef D_INO |
308 | # define D_INO(de) 0 |
314 | # define D_INO(de) 0 |
… | |
… | |
547 | } |
553 | } |
548 | |
554 | |
549 | /*****************************************************************************/ |
555 | /*****************************************************************************/ |
550 | /* work around various missing functions */ |
556 | /* work around various missing functions */ |
551 | |
557 | |
|
|
558 | #if HAVE_POSIX_CLOSE && !__linux |
|
|
559 | # define eio__close(fd) posix_close (fd, 0) |
|
|
560 | #else |
|
|
561 | # define eio__close(fd) close (fd) |
|
|
562 | #endif |
|
|
563 | |
|
|
564 | /* close() without disturbing errno */ |
|
|
565 | static void |
|
|
566 | silent_close (int fd) |
|
|
567 | { |
|
|
568 | int saved_errno = errno; |
|
|
569 | eio__close (fd); |
|
|
570 | errno = saved_errno; |
|
|
571 | } |
|
|
572 | |
552 | #ifndef HAVE_UTIMES |
573 | #ifndef HAVE_UTIMES |
553 | |
574 | |
554 | # undef utimes |
575 | # undef utimes |
555 | # define utimes(path,times) eio__utimes (path, times) |
576 | # define utimes(path,times) eio__utimes (path, times) |
556 | |
577 | |
… | |
… | |
1012 | if (fd >= 0) |
1033 | if (fd >= 0) |
1013 | { |
1034 | { |
1014 | sprintf (tmp1, "/proc/self/fd/%d", fd); |
1035 | sprintf (tmp1, "/proc/self/fd/%d", fd); |
1015 | req->result = readlink (tmp1, res, EIO_PATH_MAX); |
1036 | req->result = readlink (tmp1, res, EIO_PATH_MAX); |
1016 | /* here we should probably stat the open file and the disk file, to make sure they still match */ |
1037 | /* here we should probably stat the open file and the disk file, to make sure they still match */ |
1017 | close (fd); |
1038 | eio__close (fd); |
1018 | |
1039 | |
1019 | if (req->result > 0) |
1040 | if (req->result > 0) |
1020 | goto done; |
1041 | goto done; |
1021 | } |
1042 | } |
1022 | else if (errno == ELOOP || errno == ENAMETOOLONG || errno == ENOENT || errno == ENOTDIR || errno == EIO) |
1043 | else if (errno == ELOOP || errno == ENAMETOOLONG || errno == ENOENT || errno == ENOTDIR || errno == EIO) |
… | |
… | |
1380 | return; |
1401 | return; |
1381 | |
1402 | |
1382 | dirp = fdopendir (fd); |
1403 | dirp = fdopendir (fd); |
1383 | |
1404 | |
1384 | if (!dirp) |
1405 | if (!dirp) |
1385 | close (fd); |
1406 | silent_close (fd); |
1386 | } |
1407 | } |
1387 | else |
1408 | else |
1388 | dirp = opendir (req->ptr1); |
1409 | dirp = opendir (req->ptr1); |
1389 | #else |
1410 | #else |
1390 | dirp = opendir (wd_expand (&self->tmpbuf, req->wd, req->ptr1)); |
1411 | dirp = opendir (wd_expand (&self->tmpbuf, req->wd, req->ptr1)); |
… | |
… | |
1669 | eio_wd_close_sync (eio_wd wd) |
1690 | eio_wd_close_sync (eio_wd wd) |
1670 | { |
1691 | { |
1671 | if (wd != EIO_INVALID_WD && wd != EIO_CWD) |
1692 | if (wd != EIO_INVALID_WD && wd != EIO_CWD) |
1672 | { |
1693 | { |
1673 | #if HAVE_AT |
1694 | #if HAVE_AT |
1674 | close (wd->fd); |
1695 | eio__close (wd->fd); |
1675 | #endif |
1696 | #endif |
1676 | free (wd); |
1697 | free (wd); |
1677 | } |
1698 | } |
1678 | } |
1699 | } |
1679 | |
1700 | |
1680 | #if HAVE_AT |
1701 | #if HAVE_AT |
1681 | |
1702 | |
|
|
1703 | static int |
|
|
1704 | eio__renameat2 (int olddirfd, const char *oldpath, int newdirfd, const char *newpath, unsigned int flags) |
|
|
1705 | { |
|
|
1706 | #if HAVE_RENAMEAT2 |
|
|
1707 | return syscall (SYS_renameat2, olddirfd, oldpath, newdirfd, newpath, flags); |
|
|
1708 | #else |
|
|
1709 | if (flags) |
|
|
1710 | return EIO_ENOSYS (); |
|
|
1711 | |
|
|
1712 | return renameat (olddirfd, oldpath, newdirfd, newpath); |
|
|
1713 | #endif |
|
|
1714 | } |
|
|
1715 | |
1682 | /* they forgot these */ |
1716 | /* they forgot these */ |
1683 | |
1717 | |
1684 | static int |
1718 | static int |
1685 | eio__truncateat (int dirfd, const char *path, off_t length) |
1719 | eio__truncateat (int dirfd, const char *path, off_t length) |
1686 | { |
1720 | { |
… | |
… | |
1689 | |
1723 | |
1690 | if (fd < 0) |
1724 | if (fd < 0) |
1691 | return fd; |
1725 | return fd; |
1692 | |
1726 | |
1693 | res = ftruncate (fd, length); |
1727 | res = ftruncate (fd, length); |
1694 | close (fd); |
1728 | silent_close (fd); |
1695 | return res; |
1729 | return res; |
1696 | } |
1730 | } |
1697 | |
1731 | |
1698 | static int |
1732 | static int |
1699 | eio__statvfsat (int dirfd, const char *path, struct statvfs *buf) |
1733 | eio__statvfsat (int dirfd, const char *path, struct statvfs *buf) |
… | |
… | |
1703 | |
1737 | |
1704 | if (fd < 0) |
1738 | if (fd < 0) |
1705 | return fd; |
1739 | return fd; |
1706 | |
1740 | |
1707 | res = fstatvfs (fd, buf); |
1741 | res = fstatvfs (fd, buf); |
1708 | close (fd); |
1742 | silent_close (fd); |
1709 | return res; |
1743 | return res; |
1710 | |
|
|
1711 | } |
1744 | } |
1712 | |
1745 | |
1713 | #endif |
1746 | #endif |
1714 | |
1747 | |
1715 | /*****************************************************************************/ |
1748 | /*****************************************************************************/ |
… | |
… | |
1723 | req->ptr2 = malloc (len); \ |
1756 | req->ptr2 = malloc (len); \ |
1724 | if (!req->ptr2) \ |
1757 | if (!req->ptr2) \ |
1725 | { \ |
1758 | { \ |
1726 | errno = ENOMEM; \ |
1759 | errno = ENOMEM; \ |
1727 | req->result = -1; \ |
1760 | req->result = -1; \ |
1728 | break; \ |
1761 | goto alloc_fail; \ |
1729 | } \ |
1762 | } \ |
1730 | } |
1763 | } |
1731 | |
1764 | |
1732 | /*****************************************************************************/ |
1765 | /*****************************************************************************/ |
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|
1766 | |
|
|
1767 | static void |
|
|
1768 | eio__slurp (int fd, eio_req *req) |
|
|
1769 | { |
|
|
1770 | req->result = fd; |
|
|
1771 | |
|
|
1772 | if (fd < 0) |
|
|
1773 | return; |
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|
1774 | |
|
|
1775 | if (req->offs < 0 || !req->size) /* do we need the size? */ |
|
|
1776 | { |
|
|
1777 | off_t size = lseek (fd, 0, SEEK_END); |
|
|
1778 | |
|
|
1779 | if (req->offs < 0) |
|
|
1780 | req->offs += size; |
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|
1781 | |
|
|
1782 | if (!req->size) |
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|
1783 | req->size = size - req->offs; |
|
|
1784 | } |
|
|
1785 | |
|
|
1786 | ALLOC (req->size); |
|
|
1787 | req->result = pread (fd, req->ptr2, req->size, req->offs); |
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|
1788 | |
|
|
1789 | silent_close (fd); |
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|
1790 | |
|
|
1791 | alloc_fail: |
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|
1792 | ; |
|
|
1793 | } |
1733 | |
1794 | |
1734 | int ecb_cold |
1795 | int ecb_cold |
1735 | eio_init (void (*want_poll)(void), void (*done_poll)(void)) |
1796 | eio_init (void (*want_poll)(void), void (*done_poll)(void)) |
1736 | { |
1797 | { |
1737 | eio_want_poll_cb = want_poll; |
1798 | eio_want_poll_cb = want_poll; |
… | |
… | |
1835 | req->result = fstatat (dirfd, req->ptr1, (EIO_STRUCT_STAT *)req->ptr2, AT_SYMLINK_NOFOLLOW); break; |
1896 | req->result = fstatat (dirfd, req->ptr1, (EIO_STRUCT_STAT *)req->ptr2, AT_SYMLINK_NOFOLLOW); break; |
1836 | case EIO_CHOWN: req->result = fchownat (dirfd, req->ptr1, req->int2, req->int3, 0); break; |
1897 | case EIO_CHOWN: req->result = fchownat (dirfd, req->ptr1, req->int2, req->int3, 0); break; |
1837 | case EIO_CHMOD: req->result = fchmodat (dirfd, req->ptr1, (mode_t)req->int2, 0); break; |
1898 | case EIO_CHMOD: req->result = fchmodat (dirfd, req->ptr1, (mode_t)req->int2, 0); break; |
1838 | case EIO_TRUNCATE: req->result = eio__truncateat (dirfd, req->ptr1, req->offs); break; |
1899 | case EIO_TRUNCATE: req->result = eio__truncateat (dirfd, req->ptr1, req->offs); break; |
1839 | case EIO_OPEN: req->result = openat (dirfd, req->ptr1, req->int1, (mode_t)req->int2); break; |
1900 | case EIO_OPEN: req->result = openat (dirfd, req->ptr1, req->int1, (mode_t)req->int2); break; |
|
|
1901 | case EIO_SLURP: eio__slurp ( openat (dirfd, req->ptr1, O_RDONLY | O_CLOEXEC), req); break; |
1840 | |
1902 | |
1841 | case EIO_UNLINK: req->result = unlinkat (dirfd, req->ptr1, 0); break; |
1903 | case EIO_UNLINK: req->result = unlinkat (dirfd, req->ptr1, 0); break; |
1842 | case EIO_RMDIR: /* complications arise because "." cannot be removed, so we might have to expand */ |
1904 | case EIO_RMDIR: /* complications arise because "." cannot be removed, so we might have to expand */ |
1843 | req->result = req->wd && SINGLEDOT (req->ptr1) |
1905 | req->result = req->wd && SINGLEDOT (req->ptr1) |
1844 | ? rmdir (req->wd->str) |
1906 | ? rmdir (req->wd->str) |
1845 | : unlinkat (dirfd, req->ptr1, AT_REMOVEDIR); break; |
1907 | : unlinkat (dirfd, req->ptr1, AT_REMOVEDIR); break; |
1846 | case EIO_MKDIR: req->result = mkdirat (dirfd, req->ptr1, (mode_t)req->int2); break; |
1908 | case EIO_MKDIR: req->result = mkdirat (dirfd, req->ptr1, (mode_t)req->int2); break; |
|
|
1909 | case EIO_RENAME: req->result = eio__renameat2 ( |
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|
1910 | dirfd, |
1847 | case EIO_RENAME: /* complications arise because "." cannot be renamed, so we might have to expand */ |
1911 | /* complications arise because "." cannot be renamed, so we might have to expand */ |
1848 | req->result = req->wd && SINGLEDOT (req->ptr1) |
1912 | req->wd && SINGLEDOT (req->ptr1) ? req->wd->str : req->ptr1, |
1849 | ? rename (req->wd->str, req->ptr2) |
1913 | WD2FD ((eio_wd)req->int3), |
1850 | : renameat (dirfd, req->ptr1, WD2FD ((eio_wd)req->int3), req->ptr2); break; |
1914 | req->ptr2, |
|
|
1915 | req->int2 |
|
|
1916 | ); |
|
|
1917 | break; |
1851 | case EIO_LINK: req->result = linkat (dirfd, req->ptr1, WD2FD ((eio_wd)req->int3), req->ptr2, 0); break; |
1918 | case EIO_LINK: req->result = linkat (dirfd, req->ptr1, WD2FD ((eio_wd)req->int3), req->ptr2, 0); break; |
1852 | case EIO_SYMLINK: req->result = symlinkat (req->ptr1, dirfd, req->ptr2); break; |
1919 | case EIO_SYMLINK: req->result = symlinkat (req->ptr1, dirfd, req->ptr2); break; |
1853 | case EIO_MKNOD: req->result = mknodat (dirfd, req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break; |
1920 | case EIO_MKNOD: req->result = mknodat (dirfd, req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break; |
1854 | case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS)); |
1921 | case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS)); |
1855 | req->result = eio__statvfsat (dirfd, req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break; |
1922 | req->result = eio__statvfsat (dirfd, req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break; |
… | |
… | |
1893 | req->result = lstat (path , (EIO_STRUCT_STAT *)req->ptr2); break; |
1960 | req->result = lstat (path , (EIO_STRUCT_STAT *)req->ptr2); break; |
1894 | case EIO_CHOWN: req->result = chown (path , req->int2, req->int3); break; |
1961 | case EIO_CHOWN: req->result = chown (path , req->int2, req->int3); break; |
1895 | case EIO_CHMOD: req->result = chmod (path , (mode_t)req->int2); break; |
1962 | case EIO_CHMOD: req->result = chmod (path , (mode_t)req->int2); break; |
1896 | case EIO_TRUNCATE: req->result = truncate (path , req->offs); break; |
1963 | case EIO_TRUNCATE: req->result = truncate (path , req->offs); break; |
1897 | case EIO_OPEN: req->result = open (path , req->int1, (mode_t)req->int2); break; |
1964 | case EIO_OPEN: req->result = open (path , req->int1, (mode_t)req->int2); break; |
|
|
1965 | case EIO_SLURP: eio__slurp ( open (path , O_RDONLY | O_CLOEXEC), req); break; |
1898 | |
1966 | |
1899 | case EIO_UNLINK: req->result = unlink (path ); break; |
1967 | case EIO_UNLINK: req->result = unlink (path ); break; |
1900 | case EIO_RMDIR: req->result = rmdir (path ); break; |
1968 | case EIO_RMDIR: req->result = rmdir (path ); break; |
1901 | case EIO_MKDIR: req->result = mkdir (path , (mode_t)req->int2); break; |
1969 | case EIO_MKDIR: req->result = mkdir (path , (mode_t)req->int2); break; |
1902 | case EIO_RENAME: req->result = rename (path , req->ptr2); break; |
1970 | case EIO_RENAME: req->result = req->int2 ? EIO_ENOSYS () : rename (path, req->ptr2); break; |
1903 | case EIO_LINK: req->result = link (path , req->ptr2); break; |
1971 | case EIO_LINK: req->result = link (path , req->ptr2); break; |
1904 | case EIO_SYMLINK: req->result = symlink (path , req->ptr2); break; |
1972 | case EIO_SYMLINK: req->result = symlink (path , req->ptr2); break; |
1905 | case EIO_MKNOD: req->result = mknod (path , (mode_t)req->int2, (dev_t)req->offs); break; |
1973 | case EIO_MKNOD: req->result = mknod (path , (mode_t)req->int2, (dev_t)req->offs); break; |
1906 | case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS)); |
1974 | case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS)); |
1907 | req->result = statvfs (path , (EIO_STRUCT_STATVFS *)req->ptr2); break; |
1975 | req->result = statvfs (path , (EIO_STRUCT_STATVFS *)req->ptr2); break; |
… | |
… | |
1955 | |
2023 | |
1956 | case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break; |
2024 | case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break; |
1957 | case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break; |
2025 | case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break; |
1958 | case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break; |
2026 | case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break; |
1959 | |
2027 | |
1960 | case EIO_CLOSE: req->result = close (req->int1); break; |
2028 | case EIO_CLOSE: req->result = eio__close (req->int1); break; |
1961 | case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break; |
2029 | case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break; |
1962 | case EIO_SYNC: req->result = 0; sync (); break; |
2030 | case EIO_SYNC: req->result = 0; sync (); break; |
1963 | case EIO_FSYNC: req->result = fsync (req->int1); break; |
2031 | case EIO_FSYNC: req->result = fsync (req->int1); break; |
1964 | case EIO_FDATASYNC: req->result = fdatasync (req->int1); break; |
2032 | case EIO_FDATASYNC: req->result = fdatasync (req->int1); break; |
1965 | case EIO_SYNCFS: req->result = eio__syncfs (req->int1); break; |
2033 | case EIO_SYNCFS: req->result = eio__syncfs (req->int1); break; |
… | |
… | |
2003 | default: |
2071 | default: |
2004 | req->result = EIO_ENOSYS (); |
2072 | req->result = EIO_ENOSYS (); |
2005 | break; |
2073 | break; |
2006 | } |
2074 | } |
2007 | |
2075 | |
|
|
2076 | alloc_fail: |
2008 | req->errorno = errno; |
2077 | req->errorno = errno; |
2009 | } |
2078 | } |
2010 | |
2079 | |
2011 | #ifndef EIO_NO_WRAPPERS |
2080 | #ifndef EIO_NO_WRAPPERS |
2012 | |
2081 | |
… | |
… | |
2265 | eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data) |
2334 | eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data) |
2266 | { |
2335 | { |
2267 | return eio__2path (EIO_RENAME, path, new_path, pri, cb, data); |
2336 | return eio__2path (EIO_RENAME, path, new_path, pri, cb, data); |
2268 | } |
2337 | } |
2269 | |
2338 | |
|
|
2339 | eio_req *eio_slurp (const char *path, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data) |
|
|
2340 | { |
|
|
2341 | REQ (EIO_SLURP); PATH; req->offs = offset; req->size = length; req->ptr2 = buf; SEND; |
|
|
2342 | } |
|
|
2343 | |
2270 | eio_req *eio_custom (void (*execute)(eio_req *), int pri, eio_cb cb, void *data) |
2344 | eio_req *eio_custom (void (*execute)(eio_req *), int pri, eio_cb cb, void *data) |
2271 | { |
2345 | { |
2272 | REQ (EIO_CUSTOM); req->feed = execute; SEND; |
2346 | REQ (EIO_CUSTOM); req->feed = execute; SEND; |
2273 | } |
2347 | } |
2274 | |
2348 | |