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11 .TH OPENDIR 3C "Jun 26, 2007"
13 opendir, fdopendir \- open directory
17 #include <sys/types.h>
20 \fBDIR *\fR\fBopendir\fR(\fBconst char *\fR\fIdirname\fR);
25 \fBDIR *\fR\fBfdopendir\fR(\fBint\fR \fIfildes\fR);
31 The \fBopendir()\fR function opens a directory stream corresponding to the
32 directory named by the \fIdirname\fR argument.
35 The \fBfdopendir()\fR function opens a directory stream for the directory file
36 descriptor \fIfildes\fR. The directory file descriptor should not be used or
37 closed following a successful function call, as this might cause undefined
38 results from future operations on the directory stream obtained from the call.
39 Use \fBclosedir\fR(3C) to close a directory stream.
42 The directory stream is positioned at the first entry. If the type \fBDIR\fR is
43 implemented using a file descriptor, applications will only be able to open up
44 to a total of {\fBOPEN_MAX\fR} files and directories. A successful call to any
45 of the \fBexec\fR functions will close any directory streams that are open in
46 the calling process. See \fBexec\fR(2).
50 Upon successful completion, \fBopendir()\fR and \fBfdopendir()\fR return a
51 pointer to an object of type \fBDIR\fR. Otherwise, a null pointer is returned
52 and \fBerrno\fR is set to indicate the error.
56 The \fBopendir()\fR function will fail if:
63 Search permission is denied for the component of the path prefix of
64 \fIdirname\fR or read permission is denied for \fIdirname\fR.
73 Too many symbolic links were encountered in resolving \fIpath\fR.
79 \fB\fBENAMETOOLONG\fR\fR
82 The length of the \fIdirname\fR argument exceeds {\fBPATH_MAX\fR}, or a path
83 name component is longer than {\fBNAME_MAX\fR} while {\fB_POSIX_NO_TRUNC\fR} is
93 A component of \fIdirname\fR does not name an existing directory or
94 \fIdirname\fR is an empty string.
103 A component of \fIdirname\fR is not a directory.
108 The \fBfdopendir()\fR function will fail if:
115 The file descriptor \fIfildes\fR does not reference a directory.
120 The \fBopendir()\fR function may fail if:
127 There are {\fBOPEN_MAX\fR} file descriptors currently open in the calling
134 \fB\fBENAMETOOLONG\fR\fR
137 Pathname resolution of a symbolic link produced an intermediate result whose
138 length exceeds \fBPATH_MAX\fR.
147 Too many files are currently open on the system.
153 The \fBopendir()\fR and \fBfdopendir()\fR functions should be used in
154 conjunction with \fBreaddir\fR(3C), \fBclosedir\fR(3C) and \fBrewinddir\fR(3C)
155 to examine the contents of the directory (see the \fBEXAMPLES\fR section in
156 \fBreaddir\fR(3C)). This method is recommended for portability.
160 See \fBattributes\fR(5) for descriptions of the following attributes:
168 ATTRIBUTE TYPE ATTRIBUTE VALUE
170 Interface Stability T{
171 \fBopendir()\fR is Standard; \fBfdopendir()\fR is Evolving
180 \fBlstat\fR(2), \fBsymlink\fR(2), \fBclosedir\fR(3C), \fBreaddir\fR(3C),
181 \fBrewinddir\fR(3C), \fBscandir\fR(3C), \fBattributes\fR(5)