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94 lines
1.9 KiB
94 lines
1.9 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* I'm tired of doing "vsnprintf()" etc just to open a |
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* file, so here's a "return static buffer with printf" |
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* interface for paths. |
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* |
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* It's obviously not thread-safe. Sue me. But it's quite |
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* useful for doing things like |
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* |
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* f = open(mkpath("%s/%s.perf", base, name), O_RDONLY); |
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* |
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* which is what it's designed for. |
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*/ |
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#include "path.h" |
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#include "cache.h" |
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#include <linux/kernel.h> |
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#include <limits.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <dirent.h> |
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#include <unistd.h> |
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static char bad_path[] = "/bad-path/"; |
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/* |
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* One hack: |
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*/ |
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static char *get_pathname(void) |
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{ |
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static char pathname_array[4][PATH_MAX]; |
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static int idx; |
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return pathname_array[3 & ++idx]; |
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} |
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static char *cleanup_path(char *path) |
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{ |
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/* Clean it up */ |
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if (!memcmp(path, "./", 2)) { |
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path += 2; |
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while (*path == '/') |
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path++; |
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} |
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return path; |
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} |
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char *mkpath(const char *fmt, ...) |
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{ |
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va_list args; |
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unsigned len; |
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char *pathname = get_pathname(); |
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va_start(args, fmt); |
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len = vsnprintf(pathname, PATH_MAX, fmt, args); |
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va_end(args); |
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if (len >= PATH_MAX) |
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return bad_path; |
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return cleanup_path(pathname); |
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} |
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int path__join(char *bf, size_t size, const char *path1, const char *path2) |
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{ |
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return scnprintf(bf, size, "%s%s%s", path1, path1[0] ? "/" : "", path2); |
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} |
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int path__join3(char *bf, size_t size, const char *path1, const char *path2, const char *path3) |
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{ |
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return scnprintf(bf, size, "%s%s%s%s%s", path1, path1[0] ? "/" : "", |
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path2, path2[0] ? "/" : "", path3); |
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} |
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bool is_regular_file(const char *file) |
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{ |
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struct stat st; |
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if (stat(file, &st)) |
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return false; |
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return S_ISREG(st.st_mode); |
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} |
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/* Helper function for filesystems that return a dent->d_type DT_UNKNOWN */ |
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bool is_directory(const char *base_path, const struct dirent *dent) |
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{ |
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char path[PATH_MAX]; |
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struct stat st; |
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sprintf(path, "%s/%s", base_path, dent->d_name); |
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if (stat(path, &st)) |
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return false; |
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return S_ISDIR(st.st_mode); |
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}
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