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author | Daniel Lange <DLange@git.local> | 2020-12-07 10:26:01 +0100 |
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committer | Daniel Lange <DLange@git.local> | 2020-12-07 10:26:01 +0100 |
commit | 65357c8c46154de4e4eca14075bfe5523bb5fc14 (patch) | |
tree | 8f430ee5a0d5de377c4e7c94e47842a27c70d7e8 /Compat.c | |
parent | f80394a20254938142011855f2954b3f63fe5909 (diff) | |
download | debian_htop-65357c8c46154de4e4eca14075bfe5523bb5fc14.tar.gz debian_htop-65357c8c46154de4e4eca14075bfe5523bb5fc14.tar.bz2 debian_htop-65357c8c46154de4e4eca14075bfe5523bb5fc14.zip |
New upstream version 3.0.3upstream/3.0.3
Diffstat (limited to 'Compat.c')
-rw-r--r-- | Compat.c | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/Compat.c b/Compat.c new file mode 100644 index 0000000..43d02ec --- /dev/null +++ b/Compat.c @@ -0,0 +1,119 @@ +/* +htop - Compat.c +(C) 2020 htop dev team +Released under the GNU GPLv2, see the COPYING file +in the source distribution for its full text. +*/ + +#include "config.h" // IWYU pragma: keep + +#include "Compat.h" + +#include <errno.h> +#include <fcntl.h> // IWYU pragma: keep +#include <unistd.h> +#include <sys/stat.h> +#include <sys/types.h> // IWYU pragma: keep + +#include "XUtils.h" // IWYU pragma: keep + + +int Compat_faccessat(int dirfd, + const char* pathname, + int mode, + int flags) { + int ret; + +#ifdef HAVE_FACCESSAT + + // Implementation note: AT_SYMLINK_NOFOLLOW unsupported on FreeBSD, fallback to lstat in that case + + errno = 0; + + ret = faccessat(dirfd, pathname, mode, flags); + if (!ret || errno != EINVAL) + return ret; + +#endif + + // Error out on unsupported configurations + if (dirfd != AT_FDCWD || mode != F_OK) { + errno = EINVAL; + return -1; + } + + // Fallback to stat(2)/lstat(2) depending on flags + struct stat statinfo; + if(flags) { + ret = lstat(pathname, &statinfo); + } else { + ret = stat(pathname, &statinfo); + } + + return ret; +} + +int Compat_fstatat(int dirfd, + const char* dirpath, + const char* pathname, + struct stat* statbuf, + int flags) { + +#ifdef HAVE_FSTATAT + + (void)dirpath; + + return fstatat(dirfd, pathname, statbuf, flags); + +#else + + (void)dirfd; + + char path[4096]; + xSnprintf(path, sizeof(path), "%s/%s", dirpath, pathname); + + if (flags & AT_SYMLINK_NOFOLLOW) + return lstat(path, statbuf); + + return stat(path, statbuf); + +#endif +} + +#ifndef HAVE_OPENAT + +int Compat_openat(const char* dirpath, + const char* pathname, + int flags) { + + char path[4096]; + xSnprintf(path, sizeof(path), "%s/%s", dirpath, pathname); + + return open(path, flags); +} + +#endif /* !HAVE_OPENAT */ + +ssize_t Compat_readlinkat(int dirfd, + const char* dirpath, + const char* pathname, + char* buf, + size_t bufsize) { + +#ifdef HAVE_READLINKAT + + (void)dirpath; + + return readlinkat(dirfd, pathname, buf, bufsize); + +#else + + (void)dirfd; + + char path[4096]; + xSnprintf(path, sizeof(path), "%s/%s", dirpath, pathname); + + return readlink(path, buf, bufsize); + +#endif +} |