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--- src/missing.cc.orig 2020-09-15 17:46:41.000000000 +0300 |
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+++ src/missing.cc 2020-09-25 19:02:27.887117000 +0300 |
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@@ -40,6 +40,13 @@ |
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|
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#ifndef HAVE_FDWALK |
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|
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+#ifdef __FreeBSD__ |
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+#include <sys/param.h> |
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+#include <sys/sysctl.h> |
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+#include <sys/user.h> |
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+#include <sys/file.h> |
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+#endif |
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+ |
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#ifdef __linux__ |
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|
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struct linux_dirent64 |
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@@ -128,6 +135,48 @@ |
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return RLIM_INFINITY; |
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} |
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|
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+#ifdef __FreeBSD__ |
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+static int |
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+fdwalk2(int (*func)(void *, int), void *udata, int *ret) { |
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+ size_t i, bufsz = 0; |
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+ struct xfile *xfbuf, *xf; |
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+ int uret = 0, pid_found = 0; |
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+ int mib[2] = { CTL_KERN, KERN_FILE }; |
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+ pid_t pid; |
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+ |
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+ if (NULL == func) |
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+ return EINVAL; |
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+ |
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+ if (sysctl(mib, nitems(mib), NULL, &bufsz, NULL, 0) == -1) |
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+ return (errno); |
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+ bufsz += 65536; |
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+ xfbuf = (struct xfile*)alloca(bufsz); |
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+ if (xfbuf == NULL) |
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+ return errno; |
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+ if (sysctl(mib, nitems(mib), xfbuf, &bufsz, NULL, 0) == -1) |
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+ return errno; |
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+ bufsz /= sizeof(struct xfile); |
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+ |
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+ pid = getpid(); |
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+ for (i = 0; i < bufsz; i++) { |
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+ xf = &xfbuf[i]; |
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+ if (pid != xf->xf_pid) { |
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+ if (pid_found) |
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+ return 0; |
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+ continue; |
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+ } |
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+ pid_found = 1; |
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+ if (0 > xf->xf_fd) |
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+ continue; |
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+ uret = func(udata, xf->xf_fd); |
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+ if (uret != 0) |
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+ break; |
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+ } |
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+ |
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+ return 0; |
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+} |
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+#endif |
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+ |
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/* This function is called between fork and execve/_exit and so must be |
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* async-signal-safe; see man:signal-safety(7). |
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*/ |
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@@ -141,6 +190,12 @@ |
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*/ |
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int fd; |
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int res = 0; |
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+ |
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+#ifdef __FreeBSD__ |
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+ if (fdwalk2(cb, data, &res) == 0) |
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+ return res; |
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+ /* If any sysctl/malloc call fails continue with the fall back method */ |
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+#endif |
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|
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#ifdef __linux__ |
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/* Avoid use of opendir/closedir since these are not async-signal-safe. */ |