diff options
author | Tor Lillqvist <tml@iki.fi> | 2000-10-30 22:06:22 +0000 |
---|---|---|
committer | Tor Lillqvist <tml@src.gnome.org> | 2000-10-30 22:06:22 +0000 |
commit | dd3f4d6bb37b2f8eb4722bcbd2560a45ac1fa2d9 (patch) | |
tree | fbef3b1efadbc9ce14d67b94909c2749f76afe30 /gfileutils.c | |
parent | 6acee58bdfc7e90ff8be4130b3eb3aaa319cfd3b (diff) | |
download | glib-dd3f4d6bb37b2f8eb4722bcbd2560a45ac1fa2d9.tar.gz |
gutils.c gutils.h gfileutils.c Actually, g_mkstemp() is better suited in
2000-10-31 Tor Lillqvist <tml@iki.fi>
* gutils.c
* gutils.h
* gfileutils.c
* gfileutils.h: Actually, g_mkstemp() is better suited in gfileutils.
Diffstat (limited to 'gfileutils.c')
-rw-r--r-- | gfileutils.c | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/gfileutils.c b/gfileutils.c index 20a8d370a..e983a1dad 100644 --- a/gfileutils.c +++ b/gfileutils.c @@ -497,3 +497,78 @@ g_file_get_contents (const gchar *filename, return get_contents_posix (filename, contents, length, error); #endif } + +/** + * g_mkstemp: + * + * Open a temporary file + * + * The parameter is a string that should match the rules for mktemp, i.e. + * end in "XXXXXX". The X string will be modified to form the name + * of a file that didn't exist. + * + * Return value: A file handle (as from open()) to the file file + * opened for reading and writing. The file is opened in binary mode + * on platforms where there is a difference. The file handle should be + * closed with close(). In case of errors, -1 is returned. + * + * From the GNU C library. + * Copyright (C) 1991,92,93,94,95,96,97,98,99 Free Software Foundation, Inc. + */ +int +g_mkstemp (char *tmpl) +{ +#ifdef HAVE_MKSTEMP + return mkstemp (tmpl); +#else + int len; + char *XXXXXX; + int count, fd; + static const char letters[] = + "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"; + glong value; + GTimeVal tv; + + len = strlen (tmpl); + if (len < 6 || strcmp (&tmpl[len - 6], "XXXXXX")) + return -1; + + /* This is where the Xs start. */ + XXXXXX = &tmpl[len - 6]; + + /* Get some more or less random data. */ + g_get_current_time (&tv); + value = tv.tv_usec ^ tv.tv_sec; + + for (count = 0; count < 100; value += 7777, ++count) + { + glong v = value; + + /* Fill in the random bits. */ + XXXXXX[0] = letters[v % 62]; + v /= 62; + XXXXXX[1] = letters[v % 62]; + v /= 62; + XXXXXX[2] = letters[v % 62]; + v /= 62; + XXXXXX[3] = letters[v % 62]; + v /= 62; + XXXXXX[4] = letters[v % 62]; + v /= 62; + XXXXXX[5] = letters[v % 62]; + + fd = open (tmpl, O_RDWR | O_CREAT | O_EXCL | O_BINARY, 0600); + + if (fd >= 0) + return fd; + else if (errno != EEXIST) + /* Any other error will apply also to other names we might + * try, and there are 2^32 or so of them, so give up now. + */ + return -1; + } + + /* We got out of the loop because we ran out of combinations to try. */ + return -1; +#endif +} |