diff options
Diffstat (limited to 'Compat.c')
| -rw-r--r-- | Compat.c | 47 |
1 files changed, 42 insertions, 5 deletions
@@ -1,7 +1,7 @@ /* htop - Compat.c (C) 2020 htop dev team -Released under the GNU GPLv2, see the COPYING file +Released under the GNU GPLv2+, see the COPYING file in the source distribution for its full text. */ @@ -11,6 +11,7 @@ in the source distribution for its full text. #include <errno.h> #include <fcntl.h> // IWYU pragma: keep +#include <limits.h> #include <unistd.h> #include <sys/stat.h> #include <sys/types.h> // IWYU pragma: keep @@ -18,6 +19,12 @@ in the source distribution for its full text. #include "XUtils.h" // IWYU pragma: keep +/* GNU/Hurd does not have PATH_MAX in limits.h */ +#ifndef PATH_MAX +# define PATH_MAX 4096 +#endif + + int Compat_faccessat(int dirfd, const char* pathname, int mode, @@ -43,11 +50,11 @@ int Compat_faccessat(int dirfd, } // Fallback to stat(2)/lstat(2) depending on flags - struct stat statinfo; - if(flags) { - ret = lstat(pathname, &statinfo); + struct stat sb; + if (flags) { + ret = lstat(pathname, &sb); } else { - ret = stat(pathname, &statinfo); + ret = stat(pathname, &sb); } return ret; @@ -117,3 +124,33 @@ ssize_t Compat_readlinkat(int dirfd, #endif } + +ssize_t Compat_readlink(openat_arg_t dirfd, + const char* pathname, + char* buf, + size_t bufsize) { + +#ifdef HAVE_OPENAT + + char fdPath[32]; + xSnprintf(fdPath, sizeof(fdPath), "/proc/self/fd/%d", dirfd); + + char dirPath[PATH_MAX + 1]; + ssize_t r = readlink(fdPath, dirPath, sizeof(dirPath) - 1); + if (r < 0) + return r; + + dirPath[r] = '\0'; + + char linkPath[PATH_MAX + 1]; + xSnprintf(linkPath, sizeof(linkPath), "%s/%s", dirPath, pathname); + +#else + + char linkPath[PATH_MAX + 1]; + xSnprintf(linkPath, sizeof(linkPath), "%s/%s", dirfd, pathname); + +#endif /* HAVE_OPENAT */ + + return readlink(linkPath, buf, bufsize); +} |