stdio: stdin/stdout/stderr, perror, final adjustments

Support for <stdio.h> will stop here for now.

CMakeLists.txt

@@ -143,6 +143,7 @@ set(SOURCES
   src/libc/stdio/getc.c
   src/libc/stdio/getchar.c
   src/libc/stdio/gets.c
+  src/libc/stdio/perror.c
   src/libc/stdio/printf.c
   src/libc/stdio/printf/format_fixed.c
   src/libc/stdio/printf/format_fp.c
@@ -158,6 +159,7 @@ set(SOURCES
   src/libc/stdio/setvbuf.c
   src/libc/stdio/snprintf.c
   src/libc/stdio/sprintf.c
+  src/libc/stdio/streams.c
   src/libc/stdio/ungetc.c
   src/libc/stdio/vasprintf.c
   src/libc/stdio/vdprintf.c

STATUS

@@ -84,8 +84,8 @@ TEST:       Function/symbol/macro needs to be tested
 7.18 <stdint.h> => GCC
 
 7.19 <stdio.h>
-     7.19.1    Introduction                  TEST (no wide-oriented streams *)
+     7.19.1    Introduction                  - (no wide-oriented streams *)
-     7.19.1    stdin, stdout, stderr         TODO
+     7.19.1    stdin, stdout, stderr         -
 
      7.19.4.1  remove                        TEST
      7.19.4.2  rename                        TODO
@@ -93,42 +93,42 @@ TEST:       Function/symbol/macro needs to be tested
      7.19.4.4  tmpnam                        TODO
 
      7.19.5.1  fclose                        -
-     7.19.5.2  fflush                        -
+     7.19.5.2  fflush                        - (fflush(NULL) not supported yet)
      7.19.5.3  fopen                         -
      (EXT)     fdopen                        -
      7.19.5.4  freopen                       -
      7.19.5.5  setbuf                        -
      7.19.5.6  setvbuf                       -
 
-     7.19.6.1  fprintf                       TEST
+     7.19.6.1  fprintf                       -
      7.19.6.2  fscanf                        TODO
-     7.19.6.3  printf                        LDEPS(stdout)
+     7.19.6.3  printf                        -
      7.19.6.4  scanf                         TODO
      7.19.6.5  snprintf                      -
      7.19.6.6  sprintf                       -
      7.19.6.7  sscanf                        TODO
-     7.19.6.8  vfprintf                      TEST
+     7.19.6.8  vfprintf                      -
      7.19.6.9  vfscanf                       TODO
-     7.19.6.10 vprintf                       LDEPS(stdout)
+     7.19.6.10 vprintf                       -
      7.19.6.11 vscanf                        TODO
      7.19.6.12 vsnprintf                     -
      7.19.6.13 vsprintf                      -
      7.19.6.14 vsscanf                       TODO
      (EXT)     asprintf                      -
      (EXT)     vasprintf                     -
-     (EXT)     dprintf                       TEST
+     (EXT)     dprintf                       -
-     (EXT)     vdprintf                      TEST
+     (EXT)     vdprintf                      -
 
      7.19.7.1  fgetc                         -
      7.19.7.2  fgets                         -
      7.19.7.3  fputc                         -
      7.19.7.4  fputs                         -
      7.19.7.5  getc                          -
-     7.19.7.6  getchar                       LDEPS(stdin)
+     7.19.7.6  getchar                       -
-     7.19.7.7  gets                          LDEPS(stdin)
+     7.19.7.7  gets                          -
      7.19.7.8  putc                          -
-     7.19.7.9  putchar                       LDEPS(stdout)
+     7.19.7.9  putchar                       -
-     7.19.7.10 puts                          LDEPS(stdout)
+     7.19.7.10 puts                          -
      7.19.7.11 ungetc                        -
 
      7.19.8.1  fread                         -
@@ -143,7 +143,7 @@ TEST:       Function/symbol/macro needs to be tested
      7.19.10.1 clearerr                      -
      7.19.10.2 feof                          -
      7.19.10.3 ferror                        -
-     7.19.10.4 perror                        TODO
+     7.19.10.4 perror                        -
 
 7.20 <stdlib.h>
      7.20      MB_CUR_MAX                    TODO

src/libc/stdio/perror.c

@@ -0,0 +1,15 @@
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+
+void perror(char const *s)
+{
+	int errno_copy = errno;
+
+	if(s != NULL) {
+		fputs(s, stderr);
+		fputs(": ", stderr);
+	}
+	fputs(strerror(errno_copy), stderr);
+	fputc('\n', stderr);
+}

src/libc/stdio/printf/print.c

@@ -107,7 +107,7 @@ void __printf_flush(struct __printf_output *out)
 	/* File pointer: output with fwrite */
 	else if(out->fp)
 	{
-		// fwrite(out->buffer, out->ptr - out->buffer, 1, out->fp);
+		fwrite(out->buffer, 1, out->ptr - out->buffer, out->fp);
 	}
 	/* File pointer: output with write */
 	else if(out->fd)

src/libc/stdio/streams.c

@@ -0,0 +1,18 @@
+#include <stdio.h>
+#include <unistd.h>
+
+FILE *stdin;
+FILE *stdout;
+FILE *stderr;
+
+__attribute__((constructor))
+static void initialize_streams(void)
+{
+	stdin = fdopen(STDIN_FILENO, "r");
+
+	stdout = fdopen(STDOUT_FILENO, "w");
+	setvbuf(stdout, NULL, _IOLBF, BUFSIZ);
+
+	stderr = fdopen(STDERR_FILENO, "w");
+	setvbuf(stderr, NULL, _IONBF, 0);
+}