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Code Issues Releases Wiki Activity

355. [func] Added isc_dir_createunique(), similar to mkdtemp().

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This commit is contained in:
David Lawrence
2000-07-27 02:04:36 +00:00
parent c34bdef6bd
commit febf5f8b55
3 changed files with 86 additions and 6 deletions
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2
CHANGES
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@@ -1,3 +1,5 @@
355. [func] Added isc_dir_createunique(), similar to mkdtemp().
354. [doc] Man pages for the dnssec tools are now included in
the distribution, in doc/man/dnssec.

79
lib/isc/unix/dir.c
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@@ -15,12 +15,16 @@
* SOFTWARE.
*/
/* $Id: dir.c,v 1.10 2000/05/11 15:09:27 tale Exp $ */
/* $Id: dir.c,v 1.11 2000/07/27 02:04:34 tale Exp $ */
/* Principal Authors: DCL */
#include <config.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <ctype.h>
#include <errno.h>
#include <unistd.h>
@@ -126,10 +130,6 @@ isc_dir_reset(isc_dir_t *dir) {
return (ISC_R_SUCCESS);
}
/*
* XXX Is there a better place for this?
*/
isc_result_t
isc_dir_chdir(const char *dirname) {
/*
@@ -143,3 +143,72 @@ isc_dir_chdir(const char *dirname) {
return (ISC_R_SUCCESS);
}
isc_result_t
isc_dir_createunique(char *templet) {
isc_result_t result;
char *x;
char *p;
int i;
int pid;
REQUIRE(templet != NULL);
/*
* mkdtemp is not portable, so this emulates it.
*/
pid = getpid();
/*
* Replace trailing Xs with the process-id, zero-filled.
*/
for (x = templet + strlen(templet) - 1; *x == 'X' && x >= templet;
x--, pid /= 10)
*x = pid % 10 + '0';
x++; /* Set x to start of ex-Xs. */
do {
i = mkdir(templet, 0700);
if (i == 0 || errno != EEXIST)
break;
/*
* The BSD algorithm.
*/
p = x;
while (*p != '\0') {
if (isdigit(*p))
*p = 'a';
else if (*p != 'z')
++*p;
else {
/*
* Reset character and move to next.
*/
*p++ = 'a';
continue;
}
break;
}
if (*p == '\0') {
/*
* Tried all combinations. errno should already
* be EEXIST, but ensure it is anyway for
* isc__errno2result().
*/
errno = EEXIST;
break;
}
} while (1);
if (i == -1)
result = isc__errno2result(errno);
else
result = ISC_R_SUCCESS;
return (result);
}

11
lib/isc/unix/include/isc/dir.h
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@@ -15,7 +15,7 @@
* SOFTWARE.
*/
/* $Id: dir.h,v 1.8 2000/06/23 03:08:18 tale Exp $ */
/* $Id: dir.h,v 1.9 2000/07/27 02:04:36 tale Exp $ */
/* Principal Authors: DCL */
@@ -73,6 +73,15 @@ isc_dir_close(isc_dir_t *dir);
isc_result_t
isc_dir_chdir(const char *dirname);
isc_result_t
isc_dir_createunique(char *templet);
/*
* Use a templet (such as from isc_file_mktemplate()) to create a uniquely
* named, empty directory. The templet string is modified in place.
* If result == ISC_R_SUCCESS, it is the name of the directory that was
* created.
*/
ISC_LANG_ENDDECLS
#endif /* ISC_DIR_H */