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10 .TH FTELL 3C "Jul 24, 2002"
12 ftell, ftello \- return a file offset in a stream
18 \fBlong\fR \fBftell\fR(\fBFILE *\fR\fIstream\fR);
23 \fBoff_t\fR \fBftello\fR(\fBFILE *\fR\fIstream\fR);
29 The \fBftell()\fR function obtains the current value of the file-position
30 indicator for the stream pointed to by \fIstream\fR. The \fBftello()\fR
31 function is identical to \fBftell()\fR except for the return type.
35 Upon successful completion, the \fBftell()\fR and \fBftello()\fR functions
36 return the current value of the file-position indicator for the stream measured
37 in bytes from the beginning of the file. Otherwise, they return \fB\(mi1\fR and
38 sets \fBerrno\fR to indicate the error.
42 The \fBftell()\fR and \fBftello()\fR functions will fail if:
49 The file descriptor underlying \fIstream\fR is not an open file descriptor.
58 The file descriptor underlying \fIstream\fR is associated with a pipe, a FIFO,
64 The \fBftell()\fR function will fail if:
71 The current file offset cannot be represented correctly in an object of type
77 The \fBftello()\fR function will fail if:
84 The current file offset cannot be represented correctly in an object of type
91 The \fBftello()\fR function has a transitional interface for 64-bit file
92 offsets. See \fBlf64\fR(5).
96 See \fBattributes\fR(5) for descriptions of the following attributes:
104 ATTRIBUTE TYPE ATTRIBUTE VALUE
106 Interface Stability Standard
114 \fBlseek\fR(2), \fBfopen\fR(3C), \fBfseek\fR(3C), \fBattributes\fR(5), ,
115 \fBstandards\fR(5), \fBlf64\fR(5)