musl/src/unistd/getcwd.c

#include <unistd.h>
#include <errno.h>
#include <limits.h>
#include <string.h>
#include "syscall.h"

char *getcwd(char *buf, size_t size)
{
	char tmp[PATH_MAX];
	if (!buf) buf = tmp, size = PATH_MAX;
	if (syscall(SYS_getcwd, buf, size) < 0) return 0;
	return buf == tmp ? strdup(buf) : buf;
}
initial check-in, version 0.5.0 2011-02-12 00:22:29 -05:00			`#include <unistd.h>`
			`#include <errno.h>`
support null buffer argument to getcwd, auto-allocating behavior this is a popular extension some programs depend on, and by using a temporary buffer and strdup rather than malloc prior to the syscall, i've avoided the dependency on free and thus minimized the bloat cost of supporting this feature. 2012-03-01 22:08:05 -05:00			`#include <limits.h>`
			`#include <string.h>`
initial check-in, version 0.5.0 2011-02-12 00:22:29 -05:00			`#include "syscall.h"`

			`char getcwd(char buf, size_t size)`
			`{`
support null buffer argument to getcwd, auto-allocating behavior this is a popular extension some programs depend on, and by using a temporary buffer and strdup rather than malloc prior to the syscall, i've avoided the dependency on free and thus minimized the bloat cost of supporting this feature. 2012-03-01 22:08:05 -05:00			`char tmp[PATH_MAX];`
			`if (!buf) buf = tmp, size = PATH_MAX;`
			`if (syscall(SYS_getcwd, buf, size) < 0) return 0;`
			`return buf == tmp ? strdup(buf) : buf;`
initial check-in, version 0.5.0 2011-02-12 00:22:29 -05:00			`}`