Warning: That file was not part of the compilation database. It may have many parsing errors.
| 1 | /* SPDX-License-Identifier: LGPL-2.1 OR MIT */ |
|---|---|
| 2 | /* |
| 3 | * Directory access for NOLIBC |
| 4 | * Copyright (C) 2025 Thomas Weißschuh <linux@weissschuh.net> |
| 5 | */ |
| 6 | |
| 7 | /* make sure to include all global symbols */ |
| 8 | #include "nolibc.h" |
| 9 | |
| 10 | #ifndef _NOLIBC_DIRENT_H |
| 11 | #define _NOLIBC_DIRENT_H |
| 12 | |
| 13 | #include "compiler.h" |
| 14 | #include "stdint.h" |
| 15 | #include "types.h" |
| 16 | #include "fcntl.h" |
| 17 | |
| 18 | #include <linux/limits.h> |
| 19 | |
| 20 | struct dirent { |
| 21 | ino_t d_ino; |
| 22 | char d_name[NAME_MAX + 1]; |
| 23 | }; |
| 24 | |
| 25 | /* See comment of FILE in stdio.h */ |
| 26 | typedef struct { |
| 27 | char dummy[1]; |
| 28 | } DIR; |
| 29 | |
| 30 | static __attribute__((unused)) |
| 31 | DIR *fdopendir(int fd) |
| 32 | { |
| 33 | if (fd < 0) { |
| 34 | SET_ERRNO(EBADF); |
| 35 | return NULL; |
| 36 | } |
| 37 | return (DIR *)(intptr_t)~fd; |
| 38 | } |
| 39 | |
| 40 | static __attribute__((unused)) |
| 41 | DIR *opendir(const char *name) |
| 42 | { |
| 43 | int fd; |
| 44 | |
| 45 | fd = open(path: name, O_RDONLY); |
| 46 | if (fd == -1) |
| 47 | return NULL; |
| 48 | return fdopendir(fd); |
| 49 | } |
| 50 | |
| 51 | static __attribute__((unused)) |
| 52 | int closedir(DIR *dirp) |
| 53 | { |
| 54 | intptr_t i = (intptr_t)dirp; |
| 55 | |
| 56 | if (i >= 0) { |
| 57 | SET_ERRNO(EBADF); |
| 58 | return -1; |
| 59 | } |
| 60 | return close(fd: ~i); |
| 61 | } |
| 62 | |
| 63 | static __attribute__((unused)) |
| 64 | int readdir_r(DIR *dirp, struct dirent *entry, struct dirent **result) |
| 65 | { |
| 66 | char buf[sizeof(struct linux_dirent64) + NAME_MAX + 1] __nolibc_aligned_as(struct linux_dirent64); |
| 67 | struct linux_dirent64 *ldir = (void *)buf; |
| 68 | intptr_t i = (intptr_t)dirp; |
| 69 | int fd, ret; |
| 70 | |
| 71 | if (i >= 0) |
| 72 | return EBADF; |
| 73 | |
| 74 | fd = ~i; |
| 75 | |
| 76 | ret = sys_getdents64(fd, dirp: ldir, count: sizeof(buf)); |
| 77 | if (ret < 0) |
| 78 | return -ret; |
| 79 | if (ret == 0) { |
| 80 | *result = NULL; |
| 81 | return 0; |
| 82 | } |
| 83 | |
| 84 | /* |
| 85 | * getdents64() returns as many entries as fit the buffer. |
| 86 | * readdir() can only return one entry at a time. |
| 87 | * Make sure the non-returned ones are not skipped. |
| 88 | */ |
| 89 | ret = sys_lseek(fd, ldir->d_off, SEEK_SET); |
| 90 | if (ret < 0) |
| 91 | return -ret; |
| 92 | |
| 93 | entry->d_ino = ldir->d_ino; |
| 94 | /* the destination should always be big enough */ |
| 95 | strlcpy(dst: entry->d_name, src: ldir->d_name, size: sizeof(entry->d_name)); |
| 96 | *result = entry; |
| 97 | return 0; |
| 98 | } |
| 99 | |
| 100 | #endif /* _NOLIBC_DIRENT_H */ |
| 101 |
Warning: That file was not part of the compilation database. It may have many parsing errors.