diff options
| author | Theo de Raadt <deraadt@cvs.openbsd.org> | 1997-02-07 13:01:25 +0000 |
|---|---|---|
| committer | Theo de Raadt <deraadt@cvs.openbsd.org> | 1997-02-07 13:01:25 +0000 |
| commit | 3726b717f8d5b50637dc8bef79d164e9d5130d16 (patch) | |
| tree | 9a20d441bedeee43bf5d316e3307979c3b42385b /lib/libc/stdio/mktemp.c | |
| parent | 75c3bed0edcc445c71ccadbe87e273d33061f24d (diff) | |
pre-pad with random alphabetic letters instead of digit 0
Diffstat (limited to 'lib/libc/stdio/mktemp.c')
| -rw-r--r-- | lib/libc/stdio/mktemp.c | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/lib/libc/stdio/mktemp.c b/lib/libc/stdio/mktemp.c index 0d49e06b824..b1f7092bf0e 100644 --- a/lib/libc/stdio/mktemp.c +++ b/lib/libc/stdio/mktemp.c @@ -32,7 +32,7 @@ */ #if defined(LIBC_SCCS) && !defined(lint) -static char rcsid[] = "$OpenBSD: mktemp.c,v 1.5 1997/01/20 07:46:56 graichen Exp $"; +static char rcsid[] = "$OpenBSD: mktemp.c,v 1.6 1997/02/07 13:01:24 deraadt Exp $"; #endif /* LIBC_SCCS and not lint */ #include <sys/types.h> @@ -82,14 +82,26 @@ _gettemp(path, doopen) extern int errno; register char *start, *trv; struct stat sbuf; - u_int pid; + int pid; pid = getpid(); - for (trv = path; *trv; ++trv); /* extra X's get set to 0's */ - while (*--trv == 'X') { - *trv = (pid % 10) + '0'; + for (trv = path; *trv; ++trv) + ; + --trv; + while (*trv == 'X' && pid != 0) { + *trv-- = (pid % 10) + '0'; pid /= 10; } + while (*trv == 'X') { + char c; + + pid = (arc4random() & 0xffff) % (26+26); + if (pid < 26) + c = pid + 'A'; + else + c = (pid - 26) + 'a'; + *trv-- = c; + } /* * check the target directory; if you have six X's and it |