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only use memcpy realloc to shrink if an exact-sized free chunk exists
[oweals/musl.git]
/
src
/
dirent
/
fdopendir.c
1
#include <dirent.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <stdlib.h>
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#include "__dirent.h"
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DIR *fdopendir(int fd)
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{
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DIR *dir;
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struct stat st;
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if (fstat(fd, &st) < 0) {
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return 0;
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}
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if (fcntl(fd, F_GETFL) & O_PATH) {
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errno = EBADF;
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return 0;
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}
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if (!S_ISDIR(st.st_mode)) {
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errno = ENOTDIR;
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return 0;
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}
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if (!(dir = calloc(1, sizeof *dir))) {
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return 0;
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}
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fcntl(fd, F_SETFD, FD_CLOEXEC);
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dir->fd = fd;
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return dir;
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}