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| -rw-r--r-- | ChangeLog | 3 | ||||
| -rw-r--r-- | Src/utils.c | 25 |
2 files changed, 28 insertions, 0 deletions
@@ -1,5 +1,8 @@ 2019-12-18 Daniel Shahaf <danielsh@apache.org> + * 45064: Src/utils.c: Fix the mktemp() warning, in debug + builds only. + * 45073: Doc/Zsh/contrib.yo: regex-replace docs: Simplify grammar (avoid a double negative, state defaults first). diff --git a/Src/utils.c b/Src/utils.c index 1d916e71f..086c0dfcb 100644 --- a/Src/utils.c +++ b/Src/utils.c @@ -2201,6 +2201,31 @@ gettempname(const char *prefix, int use_heap) #ifdef HAVE__MKTEMP /* Zsh uses mktemp() safely, so silence the warnings */ ret = (char *) _mktemp(ret); +#elif HAVE_MKSTEMP && defined(DEBUG) + { + /* zsh uses mktemp() safely (all callers use O_EXCL, and one of them + * uses mkfifo()/mknod(), as opposed to open()), but some compilers + * warn about this anyway and give no way to disable the warning. To + * appease them, use mkstemp() and then close the fd and unlink the + * filename, to match callers' expectations. + * + * But do this in debug builds only, because we don't want to suffer + * x3 the disk access (touch, unlink, touch again) in production. + */ + int fd; + errno = 0; + fd = mkstemp(ret); + if (fd < 0) + zwarn("can't get a temporary filename: %e", errno); + else { + close(fd); + ret = ztrdup(ret); + + errno = 0; + if (unlink(ret) < 0) + zwarn("unlinking a temporary filename failed: %e", errno); + } + } #else ret = (char *) mktemp(ret); #endif |