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LibC: Implement mkdtemp library function

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This commit is contained in:
Mauri de Souza Nunes 2019-09-12 08:43:52 -03:00 • committed by Andreas Kling
parent 161cb89e87
commit 2d24b12a34
2 changed files with 32 additions and 2 deletions
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33
Libraries/LibC/stdlib.cpp
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@ -13,6 +13,7 @@
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <unistd.h>
@ -278,8 +279,7 @@ char* mktemp(char* pattern)
{
int length = strlen(pattern);
// FIXME: Check for an invalid template pattern and return EINVAL.
if (length < 6) {
if (length < 6 || !String(pattern).ends_with("XXXXXX")) {
pattern[0] = '\0';
errno = EINVAL;
return pattern;
@ -302,6 +302,35 @@ char* mktemp(char* pattern)
return pattern;
}
char* mkdtemp(char* pattern)
{
int length = strlen(pattern);
if (length < 6 || !String(pattern).ends_with("XXXXXX")) {
errno = EINVAL;
return nullptr;
}
int start = length - 6;
static constexpr char random_characters[] = "abcdefghijklmnopqrstuvwxyz0123456789";
for (int attempt = 0; attempt < 100; ++attempt) {
for (int i = 0; i < 6; ++i)
pattern[start + i] = random_characters[(rand() % sizeof(random_characters))];
struct stat st;
int rc = lstat(pattern, &st);
if (rc < 0 && errno == ENOENT) {
if (mkdir(pattern, 0700) < 0)
return nullptr;
return pattern;
}
}
errno = EEXIST;
return nullptr;
}
void* bsearch(const void* key, const void* base, size_t nmemb, size_t size, int (*compar)(const void*, const void*))
{
dbgprintf("FIXME(LibC): bsearch(%p, %p, %u, %u, %p)\n", key, base, nmemb, size, compar);