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Cherry-pick bug fixes and Landlock Make 1.0.2

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This commit is contained in:
Justine Tunney 2022-08-10 12:56:45 -07:00
parent c1d99676c4
commit 7e1c78b4f3
13 changed files with 468 additions and 64 deletions
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59
libc/stdio/tmpfile.c
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@ -16,31 +16,60 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/bits/safemacros.internal.h"
#include "libc/calls/calls.h"
#include "libc/fmt/fmt.h"
#include "libc/macros.internal.h"
#include "libc/errno.h"
#include "libc/rand/rand.h"
#include "libc/runtime/runtime.h"
#include "libc/stdio/stdio.h"
#include "libc/stdio/temp.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/o.h"
/**
* Creates a temporary file.
* Opens stream backed by anonymous file.
*
* We use $TMPDIR or /tmp to create a temporary file securely, which
* will be unlink()'d before this function returns. The file content
* will be released from disk once fclose() is called.
*
* @see mkostempsm(), kTmpPath
* @asyncsignalsafe
* @threadsafe
* @vforksafe
*/
FILE *tmpfile(void) {
int fd;
char *tmp, *sep, tpl[PATH_MAX];
tmp = firstnonnull(getenv("TMPDIR"), kTmpPath);
sep = !isempty(tmp) && !endswith(tmp, "/") ? "/" : "";
if ((snprintf)(tpl, PATH_MAX, "%s%stmp.%s.XXXXXX", tmp, sep,
firstnonnull(program_invocation_short_name, "unknown")) <=
PATH_MAX) {
if ((fd = mkostemps(tpl, 0, 0)) != -1) {
return fdopen(fd, "w+");
FILE *f;
unsigned x;
int fd, i, j, e;
char path[PATH_MAX], *p;
p = path;
p = stpcpy(p, kTmpPath);
p = stpcpy(p, "tmp.");
if (program_invocation_short_name &&
strlen(program_invocation_short_name) < 128) {
p = stpcpy(p, program_invocation_short_name);
*p++ = '.';
}
for (i = 0; i < 10; ++i) {
x = rand64();
for (j = 0; j < 6; ++j) {
p[j] = "0123456789abcdefghijklmnopqrstuvwxyz"[x % 36];
x /= 36;
}
p[j] = 0;
e = errno;
if ((fd = open(path, O_RDWR | O_CREAT | O_EXCL, 0600)) != -1) {
unlink(path);
if ((f = fdopen(fd, "w+"))) {
return f;
} else {
close(fd);
return 0;
}
} else if (errno == EEXIST) {
errno = e;
} else {
break;
}
}
return NULL;
return 0;
}