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Add test for creating a new file and add openc macro to use openat with the mode option

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This commit is contained in:
Lucas Schumacher 2025-04-27 02:19:47 -04:00
parent eda1bbca23
commit faab7a9622
2 changed files with 22 additions and 3 deletions
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5
buildtest.c
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@ -28,9 +28,14 @@ int main() {
// Test the read syscall
#define INPUT_BUFFER_LEN 4096
char input_buffer[INPUT_BUFFER_LEN] = {0};
int32_t fout = openc("outfile", O_RDWR | O_CREAT | O_TRUNC, 0664);
write(STDOUT, "Enter some text:", 16);
intptr_t n_read = read(STDIN, input_buffer, INPUT_BUFFER_LEN);
write(STDOUT, input_buffer, n_read);
if(fout > 0) {
write(fout, input_buffer, n_read);
}
// Test the open syscall
int32_t file = open("/proc/version", O_RDONLY);

20
sys.h
View File

@ -13,11 +13,25 @@ intptr_t read(int32_t fd, const void* buf, intptr_t size);
#define O_WRONLY 01
#define O_RDWR 02
#define AT_FDCWD -100
#if defined(__mips__)
// linux/arch/mips/include/uapi/asm/fcntl.h
#define O_APPEND 0x0008
#define O_CREAT 0x0100 /* not fcntl */
#define O_TRUNC 0x0200 /* not fcntl */
#define O_EXCL 0x0400 /* not fcntl */
#define O_NOCTTY 0x0800 /* not fcntl */
#else
// linux/include/uapi/asm-generic/fcntl.h
#define O_CREAT 1<<6
#define O_EXCL 1<<7
#define O_NOCTTY 1<<8
#define O_TRUNC 1<<9
#define O_APPEND 1<<10
#endif
int32_t openat(int32_t fd, const char* filename, uint32_t flags, uint32_t mode);
#define open(...) openat(AT_FDCWD, __VA_ARGS__, 0)
//inline int32_t openat(int32_t fd, const char* filename, uint32_t flags) {return openat(fd, filename, flags, 0);}
//inline int32_t open(const char* filename, uint32_t flags, uint32_t mode) {return openat(AT_FDCWD, filename, flags, mode);}
//inline int32_t open(const char* filename, uint32_t flags) {return openat(AT_FDCWD, filename, flags, 0);}
#define openc(...) openat(AT_FDCWD, __VA_ARGS__)
uint32_t fork();