1 // SPDX-License-Identifier: GPL-2.0 2 #include "path.h" 3 #include "cache.h" 4 #include <linux/kernel.h> 5 #include <limits.h> 6 #include <stdio.h> 7 #include <string.h> 8 #include <sys/types.h> 9 #include <sys/stat.h> 10 #include <dirent.h> 11 #include <unistd.h> 12 13 static char *cleanup_path(char *path) 14 { 15 /* Clean it up */ 16 if (!memcmp(path, "./", 2)) { 17 path += 2; 18 while (*path == '/') 19 path++; 20 } 21 return path; 22 } 23 24 char *mkpath(char *path_buf, size_t sz, const char *fmt, ...) 25 { 26 va_list args; 27 unsigned len; 28 29 va_start(args, fmt); 30 len = vsnprintf(path_buf, sz, fmt, args); 31 va_end(args); 32 if (len >= sz) 33 strncpy(path_buf, "/bad-path/", sz); 34 return cleanup_path(path_buf); 35 } 36 37 int path__join(char *bf, size_t size, const char *path1, const char *path2) 38 { 39 return scnprintf(bf, size, "%s%s%s", path1, path1[0] ? "/" : "", path2); 40 } 41 42 int path__join3(char *bf, size_t size, const char *path1, const char *path2, const char *path3) 43 { 44 return scnprintf(bf, size, "%s%s%s%s%s", path1, path1[0] ? "/" : "", 45 path2, path2[0] ? "/" : "", path3); 46 } 47 48 bool is_regular_file(const char *file) 49 { 50 struct stat st; 51 52 if (stat(file, &st)) 53 return false; 54 55 return S_ISREG(st.st_mode); 56 } 57 58 /* Helper function for filesystems that return a dent->d_type DT_UNKNOWN */ 59 bool is_directory(const char *base_path, const struct dirent *dent) 60 { 61 char path[PATH_MAX]; 62 struct stat st; 63 64 snprintf(path, sizeof(path), "%s/%s", base_path, dent->d_name); 65 if (stat(path, &st)) 66 return false; 67 68 return S_ISDIR(st.st_mode); 69 } 70 71 bool is_executable_file(const char *base_path, const struct dirent *dent) 72 { 73 char path[PATH_MAX]; 74 struct stat st; 75 76 snprintf(path, sizeof(path), "%s/%s", base_path, dent->d_name); 77 if (stat(path, &st)) 78 return false; 79 80 return !S_ISDIR(st.st_mode) && (st.st_mode & S_IXUSR); 81 } 82