!97 支持sys模块api接口：ftok、nice、getlogin、getgrgid、getgrnam等

Merge pull request !97 from wangjianjun/sys

porting/liteos_a/user/src/ipc/ftok.c

-#include <sys/ipc.h>
-#include <sys/stat.h>
-#include <unsupported_api.h>
-
-key_t ftok(const char *path, int id)
-{
-	struct stat st;
-	unsupported_api(__FUNCTION__);
-	if (stat(path, &st) < 0) return -1;
-
-	return ((st.st_ino & 0xffff) | ((st.st_dev & 0xff) << 16) | ((id & 0xffu) << 24));
-}

porting/liteos_a/user/src/passwd/getgr_r.c

-#include "pwf.h"
-#include <pthread.h>
-#include <unsupported_api.h>
-
-#define FIX(x) (gr->gr_##x = gr->gr_##x-line+buf)
-
-static int getgr_r(const char *name, gid_t gid, struct group *gr, char *buf, size_t size, struct group **res)
-{
-	char *line = 0;
-	size_t len = 0;
-	char **mem = 0;
-	size_t nmem = 0;
-	int rv = 0;
-	size_t i;
-	int cs;
-
-	pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
-
-	rv = __getgr_a(name, gid, gr, &line, &len, &mem, &nmem, res);
-	if (*res && size < len + (nmem+1)*sizeof(char *) + 32) {
-		*res = 0;
-		rv = ERANGE;
-	}
-	if (*res) {
-		buf += (16-(uintptr_t)buf)%16;
-		gr->gr_mem = (void *)buf;
-		buf += (nmem+1)*sizeof(char *);
-		memcpy(buf, line, len);
-		FIX(name);
-		FIX(passwd);
-		for (i=0; mem[i]; i++)
-			gr->gr_mem[i] = mem[i]-line+buf;
-		gr->gr_mem[i] = 0;
-	}
- 	free(mem);
- 	free(line);
-	pthread_setcancelstate(cs, 0);
-	if (rv) errno = rv;
-	return rv;
-}
-
-int getgrnam_r(const char *name, struct group *gr, char *buf, size_t size, struct group **res)
-{
-	unsupported_api(__FUNCTION__);
-	return getgr_r(name, 0, gr, buf, size, res);
-}
-
-int getgrgid_r(gid_t gid, struct group *gr, char *buf, size_t size, struct group **res)
-{
-	return getgr_r(0, gid, gr, buf, size, res);
-}

porting/liteos_a/user/src/passwd/getgrent.c

-#include <unsupported_api.h>
-#include "pwf.h"
-
-static FILE *f;
-static char *line, **mem;
-static struct group gr;
-
-void setgrent()
-{
-	unsupported_api(__FUNCTION__);
-	if (f) fclose(f);
-	f = 0;
-}
-
-weak_alias(setgrent, endgrent);
-
-struct group *getgrent()
-{
-	struct group *res;
-	size_t size=0, nmem=0;
-	unsupported_api(__FUNCTION__);
-	if (!f) f = fopen("/etc/group", "rbe");
-	if (!f) return 0;
-	__getgrent_a(f, &gr, &line, &size, &mem, &nmem, &res);
-	return res;
-}
-
-struct group *getgrgid(gid_t gid)
-{
-	struct group *res;
-	size_t size=0, nmem=0;
-	unsupported_api(__FUNCTION__);
-	__getgr_a(0, gid, &gr, &line, &size, &mem, &nmem, &res);
-	return res;
-}
-
-struct group *getgrnam(const char *name)
-{
-	struct group *res;
-	size_t size=0, nmem=0;
-	__getgr_a(name, 0, &gr, &line, &size, &mem, &nmem, &res);
-	return res;
-}

porting/liteos_a/user/src/passwd/getpw_r.c

-#include "pwf.h"
-#include <pthread.h>
-#include <unsupported_api.h>
-
-#define FIX(x) (pw->pw_##x = pw->pw_##x-line+buf)
-
-static int getpw_r(const char *name, uid_t uid, struct passwd *pw, char *buf, size_t size, struct passwd **res)
-{
-	char *line = 0;
-	size_t len = 0;
-	int rv = 0;
-	int cs;
-
-	pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
-
-	rv = __getpw_a(name, uid, pw, &line, &len, res);
-	if (*res && size < len) {
-		*res = 0;
-		rv = ERANGE;
-	}
-	if (*res) {
-		memcpy(buf, line, len);
-		FIX(name);
-		FIX(passwd);
-		FIX(gecos);
-		FIX(dir);
-		FIX(shell);
-	}
- 	free(line);
-	pthread_setcancelstate(cs, 0);
-	if (rv) errno = rv;
-	return rv;
-}
-
-int getpwnam_r(const char *name, struct passwd *pw, char *buf, size_t size, struct passwd **res)
-{
-	unsupported_api(__FUNCTION__);
-	return getpw_r(name, 0, pw, buf, size, res);
-}
-
-int getpwuid_r(uid_t uid, struct passwd *pw, char *buf, size_t size, struct passwd **res)
-{
-	return getpw_r(0, uid, pw, buf, size, res);
-}

porting/liteos_a/user/src/passwd/getpwent.c

-#include "pwf.h"
-#include <unsupported_api.h>
-
-static FILE *f;
-static char *line;
-static struct passwd pw;
-static size_t size;
-
-void setpwent()
-{
-	unsupported_api(__FUNCTION__);
-	if (f) fclose(f);
-	f = 0;
-}
-
-weak_alias(setpwent, endpwent);
-
-struct passwd *getpwent()
-{
-	struct passwd *res;
-	unsupported_api(__FUNCTION__);
-	if (!f) f = fopen("/etc/passwd", "rbe");
-	if (!f) return 0;
-	__getpwent_a(f, &pw, &line, &size, &res);
-	return res;
-}
-
-struct passwd *getpwuid(uid_t uid)
-{
-	struct passwd *res;
-	unsupported_api(__FUNCTION__);
-	__getpw_a(0, uid, &pw, &line, &size, &res);
-	return res;
-}
-
-struct passwd *getpwnam(const char *name)
-{
-	struct passwd *res;
-	__getpw_a(name, 0, &pw, &line, &size, &res);
-	return res;
-}

porting/liteos_a/user/src/unistd/getlogin.c

-#include <unistd.h>
-#include <stdlib.h>
-#include <unsupported_api.h>
-
-char *getlogin(void)
-{
-	unsupported_api(__FUNCTION__);
-	return getenv("LOGNAME");
-}

porting/liteos_a/user/src/unistd/getlogin_r.c

-#include <unistd.h>
-#include <string.h>
-#include <errno.h>
-#include <unsupported_api.h>
-
-int getlogin_r(char *name, size_t size)
-{
-	char *logname = getlogin();
-	unsupported_api(__FUNCTION__);
-	if (!logname) return ENXIO; /* or...? */
-	if (strlen(logname) >= size) return ERANGE;
-	strcpy(name, logname);
-	return 0;
-}

porting/liteos_a/user/src/unistd/nice.c

-#include <unistd.h>
-#include <sys/resource.h>
-#include <limits.h>
-#include "syscall.h"
-#include <unsupported_api.h>
-
-int nice(int inc)
-{
-	int prio = inc;
-	unsupported_api(__FUNCTION__);
-	// Only query old priority if it can affect the result.
-	// This also avoids issues with integer overflow.
-	if (inc > -2*NZERO && inc < 2*NZERO)
-		prio += getpriority(PRIO_PROCESS, 0);
-	if (prio > NZERO-1) prio = NZERO-1;
-	if (prio < -NZERO) prio = -NZERO;
-	return setpriority(PRIO_PROCESS, 0, prio) ? -1 : prio;
-}