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https://github.com/torvalds/linux
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370ce164de
Avoid 4 static arrays for paths, pass in a char[] buffer to use. Makes mkpath thread safe for the small number of users. Also removes 16,384 bytes from .bss. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: K Prateek Nayak <kprateek.nayak@amd.com> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Leo Yan <leo.yan@linaro.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@amd.com> Cc: Ross Zwisler <zwisler@chromium.org> Cc: Sean Christopherson <seanjc@google.com> Cc: Steven Rostedt (VMware) <rostedt@goodmis.org> Cc: Tiezhu Yang <yangtiezhu@loongson.cn> Cc: Yang Jihong <yangjihong1@huawei.com> Link: https://lore.kernel.org/r/20230526183401.2326121-13-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
81 lines
1.7 KiB
C
81 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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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 *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(char *path_buf, size_t sz, const char *fmt, ...)
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{
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va_list args;
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unsigned len;
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va_start(args, fmt);
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len = vsnprintf(path_buf, sz, fmt, args);
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va_end(args);
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if (len >= sz)
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strncpy(path_buf, "/bad-path/", sz);
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return cleanup_path(path_buf);
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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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snprintf(path, sizeof(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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bool is_executable_file(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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snprintf(path, sizeof(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) && (st.st_mode & S_IXUSR);
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}
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