ado@elsie.UUCP (Arthur David Olson) (02/23/86)
Index: bin/sh/main.c Fix
Description:
Temporary files created by /bin/sh are given names of the form
/tmp/sh$$$serial
where "$$" above is the process identifier of the shell and "$serial"
is a serial number that starts at zero. This means that the first
temporary file created by process number 321 is given the same name as
the eleventh temporary file created by process 32--with potentially
disastrous results.
Repeat-By:
The light of a blue moon.
Fix:
Use the form
/tmp/sh$$.$serial
for temporary file names. Here's one way to do it with the 4.1bsd
version of "sh/main.c", an addition conditionally compiled based on
"OLDVERSION" (where, as usual, the trade secret status of the code
involved precludes a clearer posting):
settmp()
{
itos(getpid()); serial=0;
tmpnam=movstr(numbuf,&tmpout[TMPNAM]);
#ifndef OLDVERSION
tmpnam = movstr(".", tmpnam);
#endif
}
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