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This page displays the COHERENT manpage for mktemp() [Generate a temporary file name].
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mktemp() -- General Function (libc) Generate a temporary file name char *mktemp(pattern) char *pattern; mktemp() generates a unique file name. It can be used, for example, to name intermediate data files. pattern must consist of a string with six X's at the end. mktemp replaces these X's with the five-digit process id of the requesting process and a letter that is changed for each subsequent call. mktemp returns pattern. For example, the call char template[] = "/tmp/sortXXXXXX"; mktemp(template); might return the name /tmp/sort01234a. It is normal practice to write temporary files into the directory /tmp. The start of the file name identifies the originator of the file. See Also libc Notes Because mktemp() writes on the argument template, passing it a quoted string causes a segmentation violation. To avoid this, either compile the module that contains the call to mktemp() with the compiler option -VPSTR (to put the quoted string into segment .data rather than into segment .text) or, preferably, move the string into the data segment. For example, use char template[] = "/tmp/sortXXXXXX"; mktemp(template); rather than: mktemp("/tmp/sortXXXXXX");