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errno: don’t use ‘_errno’ as a variable name; _ are reserved for use as identifiers

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This commit is contained in:
Daniel Eklöf 2021-02-21 20:33:07 +01:00
parent 0bda60aacc
commit 555f751f94
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GPG key ID: 5BBD4992C116573F
4 changed files with 29 additions and 28 deletions
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23
spawn.c
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@ -39,10 +39,10 @@ spawn(struct reaper *reaper, const char *cwd, char *const argv[],
sigset_t mask;
sigemptyset(&mask);
if (sigprocmask(SIG_SETMASK, &mask, NULL) < 0) {
const int _errno = errno;
LOG_ERRNO_P(errno, "failed to restore signals");
(void)!write(pipe_fds[1], &_errno, sizeof(_errno));
_exit(_errno);
const int errno_copy = errno;
LOG_ERRNO("failed to restore signals");
(void)!write(pipe_fds[1], &errno_copy, sizeof(errno_copy));
_exit(errno_copy);
}
if ((stdin_fd >= 0 && (dup2(stdin_fd, STDIN_FILENO) < 0 || close(stdin_fd) < 0)) ||
@ -51,8 +51,9 @@ spawn(struct reaper *reaper, const char *cwd, char *const argv[],
(cwd != NULL && chdir(cwd) < 0) ||
execvp(argv[0], argv) < 0)
{
(void)!write(pipe_fds[1], &errno, sizeof(errno));
_exit(errno);
const int errno_copy = errno;
(void)!write(pipe_fds[1], &errno_copy, sizeof(errno_copy));
_exit(errno_copy);
}
xassert(false);
_exit(errno);
@ -61,10 +62,10 @@ spawn(struct reaper *reaper, const char *cwd, char *const argv[],
/* Parent */
close(pipe_fds[1]);
int _errno;
static_assert(sizeof(_errno) == sizeof(errno), "errno size mismatch");
int errno_copy;
static_assert(sizeof(errno_copy) == sizeof(errno), "errno size mismatch");
ssize_t ret = read(pipe_fds[0], &_errno, sizeof(_errno));
ssize_t ret = read(pipe_fds[0], &errno_copy, sizeof(errno_copy));
close(pipe_fds[0]);
if (ret == 0) {
@ -74,8 +75,8 @@ spawn(struct reaper *reaper, const char *cwd, char *const argv[],
LOG_ERRNO("failed to read from pipe");
return false;
} else {
LOG_ERRNO_P(_errno, "%s: failed to spawn", argv[0]);
errno = _errno;
LOG_ERRNO_P(errno_copy, "%s: failed to spawn", argv[0]);
errno = errno_copy;
waitpid(pid, NULL, 0);
return false;
}