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3265324e00
This change fixes #496 where ASAN spotted a race condition that could happen in multithreaded programs, with more than OPEN_MAX descriptors when using ZipOS or Windows NT, which require tracking open file info and this change fixes that table so it never relocates, thus allowing us to continue to enjoy the benefits of avoiding locks while reading.
55 lines
2.4 KiB
C
55 lines
2.4 KiB
C
#if 0
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/*─────────────────────────────────────────────────────────────────╗
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│ To the extent possible under law, Justine Tunney has waived │
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│ all copyright and related or neighboring rights to this file, │
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│ as it is written in the following disclaimers: │
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│ • http://unlicense.org/ │
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│ • http://creativecommons.org/publicdomain/zero/1.0/ │
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╚─────────────────────────────────────────────────────────────────*/
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#endif
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#include "libc/errno.h"
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#include "libc/runtime/runtime.h"
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#include "libc/stdio/stdio.h"
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#include "libc/str/str.h"
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#include "libc/sysv/consts/exit.h"
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#include "libc/sysv/consts/s.h"
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#include "third_party/musl/ftw.h"
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/**
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* @fileoverview Directory walker example.
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* Copied from IEEE Std 1003.1-2017
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*/
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static int display_info(const char *fpath, const struct stat *sb, int tflag,
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struct FTW *ftwbuf) {
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printf("%-3s %2d %7jd %-40s %d %s\n",
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(tflag == FTW_D) ? "d"
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: (tflag == FTW_DNR) ? "dnr"
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: (tflag == FTW_DP) ? "dp"
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: (tflag == FTW_F) ? (S_ISBLK(sb->st_mode) ? "f b"
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: S_ISCHR(sb->st_mode) ? "f c"
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: S_ISFIFO(sb->st_mode) ? "f p"
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: S_ISREG(sb->st_mode) ? "f r"
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: S_ISSOCK(sb->st_mode) ? "f s"
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: "f ?")
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: (tflag == FTW_NS) ? "ns"
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: (tflag == FTW_SL) ? "sl"
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: (tflag == FTW_SLN) ? "sln"
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: "?",
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ftwbuf->level, (intmax_t)sb->st_size, fpath, ftwbuf->base,
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fpath + ftwbuf->base);
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return 0; /* To tell nftw() to continue */
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}
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int main(int argc, char *argv[]) {
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int flags = 0;
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const char *dir;
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if (argc > 2 && strchr(argv[2], 'd') != NULL) flags |= FTW_DEPTH;
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if (argc > 2 && strchr(argv[2], 'p') != NULL) flags |= FTW_PHYS;
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dir = argc < 2 ? "." : argv[1];
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if (nftw(dir, display_info, 20, flags) == -1) {
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fprintf(stderr, "nftw() failed: %s: %s\n", strerror(errno), dir);
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exit(EXIT_FAILURE);
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}
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exit(EXIT_SUCCESS);
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}
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