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da9c530d99
* Update wasi-libc to a00bf321eeeca836ee2a0d2d25aeb8524107b8cc It includes a port of emscripten's allocator that performs performs much better than the old one. Most importantly, it includes the prerequisites to later add support for POSIX threads.
39 lines
863 B
C
Vendored
39 lines
863 B
C
Vendored
#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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#include "lock.h"
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char *__wasilibc_cwd = "/";
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#ifdef _REENTRANT
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static volatile int lock[1];
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void __wasilibc_cwd_lock(void) { LOCK(lock); }
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void __wasilibc_cwd_unlock(void) { UNLOCK(lock); }
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#else
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#define __wasilibc_cwd_lock() (void)0
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#define __wasilibc_cwd_unlock() (void)0
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#endif
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char *getcwd(char *buf, size_t size)
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{
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__wasilibc_cwd_lock();
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if (!buf) {
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buf = strdup(__wasilibc_cwd);
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if (!buf) {
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errno = ENOMEM;
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__wasilibc_cwd_unlock();
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return NULL;
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}
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} else {
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size_t len = strlen(__wasilibc_cwd);
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if (size < len + 1) {
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errno = ERANGE;
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__wasilibc_cwd_unlock();
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return NULL;
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}
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strcpy(buf, __wasilibc_cwd);
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}
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__wasilibc_cwd_unlock();
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return buf;
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}
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