diff options
author | Eshan dhawan <eshandhawan51@gmail.com> | 2021-01-21 01:14:27 +0300 |
---|---|---|
committer | Corinna Vinschen <corinna@vinschen.de> | 2021-02-09 13:07:59 +0300 |
commit | d8ee634506424ce8b3bea057b84ec82dfdd7a821 (patch) | |
tree | 88f4832ccc682363ff8c47192cd09e84d1f594b7 /newlib/libc/posix | |
parent | 55a6e49a0813232bbca3b3e97bb03c22c5857639 (diff) |
FTW Port for Newlib
Signed-off-by: Eshan Dhawan <eshandhawan51@gmail.com>
Diffstat (limited to 'newlib/libc/posix')
-rw-r--r-- | newlib/libc/posix/Makefile.am | 2 | ||||
-rw-r--r-- | newlib/libc/posix/ftw.c | 33 | ||||
-rw-r--r-- | newlib/libc/posix/nftw.c | 154 |
3 files changed, 188 insertions, 1 deletions
diff --git a/newlib/libc/posix/Makefile.am b/newlib/libc/posix/Makefile.am index 6cdee1df0..5a358f782 100644 --- a/newlib/libc/posix/Makefile.am +++ b/newlib/libc/posix/Makefile.am @@ -10,7 +10,7 @@ GENERAL_SOURCES = \ opendir.c readdir.c readdir_r.c \ regcomp.c regerror.c regexec.c regfree.c \ rewinddir.c sleep.c usleep.c \ - telldir.c + telldir.c ftw.c nftw.c ELIX_2_SOURCES = \ scandir.c seekdir.c diff --git a/newlib/libc/posix/ftw.c b/newlib/libc/posix/ftw.c new file mode 100644 index 000000000..18cfc24cb --- /dev/null +++ b/newlib/libc/posix/ftw.c @@ -0,0 +1,33 @@ +/* +* Copyright © 2005-2020 Rich Felker, et al. +* +* Permission is hereby granted, free of charge, to any person obtaining +* a copy of this software and associated documentation files (the +* "Software"), to deal in the Software without restriction, including +* without limitation the rights to use, copy, modify, merge, publish, +* distribute, sublicense, and/or sell copies of the Software, and to +* permit persons to whom the Software is furnished to do so, subject to +* the following conditions: +* +* The above copyright notice and this permission notice shall be +* included in all copies or substantial portions of the Software. +* +* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, +* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE +* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +*/ + +#include <ftw.h> + +int ftw(const char *path, int (*fn)(const char *, const struct stat *, int), int fd_limit) +{ + /* The following cast assumes that calling a function with one + * argument more than it needs behaves as expected. This is + * actually undefined, but works on all real-world machines. */ + return nftw(path, (int (*)())fn, fd_limit, FTW_PHYS); +} + diff --git a/newlib/libc/posix/nftw.c b/newlib/libc/posix/nftw.c new file mode 100644 index 000000000..f4f55f341 --- /dev/null +++ b/newlib/libc/posix/nftw.c @@ -0,0 +1,154 @@ +/* +* Copyright © 2005-2020 Rich Felker, et al. +* +* Permission is hereby granted, free of charge, to any person obtaining +* a copy of this software and associated documentation files (the +* "Software"), to deal in the Software without restriction, including +* without limitation the rights to use, copy, modify, merge, publish, +* distribute, sublicense, and/or sell copies of the Software, and to +* permit persons to whom the Software is furnished to do so, subject to +* the following conditions: +* +* The above copyright notice and this permission notice shall be +* included in all copies or substantial portions of the Software. +* +* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, +* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE +* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +*/ + +#include <ftw.h> +#include <dirent.h> +#include <sys/stat.h> +#include <errno.h> +#include <unistd.h> +#include <string.h> +#include <limits.h> +#include <pthread.h> + +struct history +{ + struct history *chain; + dev_t dev; + ino_t ino; + int level; + int base; +}; + +#undef dirfd +#define dirfd(d) (*(int *)d) + +static int do_nftw(char *path, int (*fn)(const char *, const struct stat *, int, struct FTW *), int fd_limit, int flags, struct history *h) +{ + size_t l = strlen(path), j = l && path[l-1]=='/' ? l-1 : l; + struct stat st; + struct history new; + int type; + int r; + struct FTW lev; + + if ((flags & FTW_PHYS) ? lstat(path, &st) : stat(path, &st) < 0) { + if (!(flags & FTW_PHYS) && errno==ENOENT && !lstat(path, &st)) + type = FTW_SLN; + else if (errno != EACCES) return -1; + else type = FTW_NS; + } else if (S_ISDIR(st.st_mode)) { + if (access(path, R_OK) < 0) type = FTW_DNR; + else if (flags & FTW_DEPTH) type = FTW_DP; + else type = FTW_D; + } else if (S_ISLNK(st.st_mode)) { + if (flags & FTW_PHYS) type = FTW_SL; + else type = FTW_SLN; + } else { + type = FTW_F; + } + + if ((flags & FTW_MOUNT) && h && st.st_dev != h->dev) + return 0; + + new.chain = h; + new.dev = st.st_dev; + new.ino = st.st_ino; + new.level = h ? h->level+1 : 0; + new.base = j+1; + + lev.level = new.level; + if (h) { + lev.base = h->base; + } else { + size_t k; + for (k=j; k && path[k]=='/'; k--); + for (; k && path[k-1]!='/'; k--); + lev.base = k; + } + + if (!(flags & FTW_DEPTH) && (r=fn(path, &st, type, &lev))) + return r; + + for (; h; h = h->chain) + if (h->dev == st.st_dev && h->ino == st.st_ino) + return 0; + + if ((type == FTW_D || type == FTW_DP) && fd_limit) { + DIR *d = opendir(path); + if (d) { + struct dirent *de; + while ((de = readdir(d))) { + if (de->d_name[0] == '.' + && (!de->d_name[1] + || (de->d_name[1]=='.' + && !de->d_name[2]))) continue; + if (strlen(de->d_name) >= PATH_MAX-l) { + errno = ENAMETOOLONG; + closedir(d); + return -1; + } + path[j]='/'; + strcpy(path+j+1, de->d_name); + if ((r=do_nftw(path, fn, fd_limit-1, flags, &new))) { + closedir(d); + return r; + } + } + closedir(d); + } else if (errno != EACCES) { + return -1; + } + } + + path[l] = 0; + if ((flags & FTW_DEPTH) && (r=fn(path, &st, type, &lev))) + return r; + + return 0; +} + +int nftw(const char *path, int (*fn)(const char *, const struct stat *, int, struct FTW *), int fd_limit, int flags) +{ + int r, cs; + size_t l; + char pathbuf[PATH_MAX+1]; + + if (fd_limit <= 0) return 0; + + l = strlen(path); + if (l > PATH_MAX) { + errno = ENAMETOOLONG; + return -1; + } + memcpy(pathbuf, path, l+1); + +#ifdef _STDIO_WITH_THREAD_CANCELLATION_SUPPORT + pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs); +#endif + r = do_nftw(pathbuf, fn, fd_limit, flags, NULL); +#ifdef _STDIO_WITH_THREAD_CANCELLATION_SUPPORT + pthread_setcancelstate(cs, 0); +#endif + return r; +} + |