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Code Issues Releases Wiki Activity

🆕 fork vfork

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This commit is contained in:
fslongjin 2022-05-06 11:44:38 +08:00
parent ffb0a3c961
commit c9784b457c
1 changed files with 27 additions and 8 deletions
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35
user/libs/libc/unistd.c
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@ -1,18 +1,17 @@
#include <libc/unistd.h> #include <libc/unistd.h>
#include <libsystem/syscall.h> #include <libsystem/syscall.h>
/** /**
* @brief 往屏幕上输出字符串 * @brief 往屏幕上输出字符串
* *
* @param str 字符串指针 * @param str 字符串指针
* @param front_color 前景色 * @param front_color 前景色
* @param bg_color 背景色 * @param bg_color 背景色
* @return int64_t * @return int64_t
*/ */
int64_t put_string(char* str, uint64_t front_color, uint64_t bg_color) int64_t put_string(char *str, uint64_t front_color, uint64_t bg_color)
{ {
return syscall_invoke(SYS_PUT_STRING, str, front_color, bg_color,0,0,0,0,0); return syscall_invoke(SYS_PUT_STRING, (uint64_t)str, front_color, bg_color, 0, 0, 0, 0, 0);
} }
/** /**
* @brief 关闭文件接口 * @brief 关闭文件接口
@ -35,7 +34,7 @@ int close(int fd)
*/ */
ssize_t read(int fd, void *buf, size_t count) ssize_t read(int fd, void *buf, size_t count)
{ {
return (ssize_t)syscall_invoke(SYS_READ, fd, buf, count,0,0,0,0,0); return (ssize_t)syscall_invoke(SYS_READ, fd, (uint64_t)buf, count, 0, 0, 0, 0, 0);
} }
/** /**
@ -48,7 +47,7 @@ ssize_t read(int fd, void *buf, size_t count)
*/ */
ssize_t write(int fd, void const *buf, size_t count) ssize_t write(int fd, void const *buf, size_t count)
{ {
return (ssize_t)syscall_invoke(SYS_WRITE, fd, buf, count,0,0,0,0,0); return (ssize_t)syscall_invoke(SYS_WRITE, fd, (uint64_t)buf, count, 0, 0, 0, 0, 0);
} }
/** /**
@ -61,5 +60,25 @@ ssize_t write(int fd, void const *buf, size_t count)
*/ */
off_t lseek(int fd, off_t offset, int whence) off_t lseek(int fd, off_t offset, int whence)
{ {
return (off_t)syscall_invoke(SYS_LSEEK, fd, offset, whence, 0,0,0,0,0); return (off_t)syscall_invoke(SYS_LSEEK, fd, offset, whence, 0, 0, 0, 0, 0);
}
/**
* @brief fork当前进程
*
* @return pid_t
*/
pid_t fork(void)
{
return (pid_t)syscall_invoke(SYS_FORK, 0, 0, 0, 0, 0, 0, 0, 0);
}
/**
* @brief fork当前进程，但是与父进程共享VM、flags、fd
*
* @return pid_t
*/
pid_t vfork(void)
{
return (pid_t)syscall_invoke(SYS_VFORK, 0, 0, 0, 0, 0, 0, 0, 0);
} }