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use stdio(3)

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This commit is contained in:
Matthias-Christian Ott
2008-08-25 17:56:00 +02:00
parent 7e57d1fbba
commit 6bcdd0edd5
1 changed files with 48 additions and 47 deletions
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95
std.c
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@ -15,6 +15,7 @@
#include <sys/wait.h> #include <sys/wait.h>
#include <ctype.h> #include <ctype.h>
#include <err.h> #include <err.h>
#include <errno.h>
#include <fcntl.h> #include <fcntl.h>
#if !(_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600) #if !(_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600)
#include <pty.h> #include <pty.h>
@ -36,15 +37,8 @@ typedef struct {
int n; int n;
} RingBuffer; } RingBuffer;
typedef struct {
unsigned char data[BUFSIZ];
int i, n;
int fd;
} ReadBuffer;
static void buffer(char c); static void buffer(char c);
static void cmd(const char *cmdstr, ...); static void cmd(const char *cmdstr, ...);
static int getch(ReadBuffer *buf);
static void getpty(void); static void getpty(void);
static void movea(int x, int y); static void movea(int x, int y);
static void mover(int x, int y); static void mover(int x, int y);
@ -54,7 +48,6 @@ static void scroll(int l);
static void shell(void); static void shell(void);
static void sigchld(int n); static void sigchld(int n);
static char unbuffer(void); static char unbuffer(void);
static void ungetch(ReadBuffer *buf, int c);
static int cols = 80, lines = 25; static int cols = 80, lines = 25;
static int cx = 0, cy = 0; static int cx = 0, cy = 0;
@ -63,7 +56,7 @@ static int ptm, pts;
static _Bool bold, digit, qmark; static _Bool bold, digit, qmark;
static pid_t pid; static pid_t pid;
static RingBuffer buf; static RingBuffer buf;
static ReadBuffer cmdbuf, ptmbuf; static FILE *fptm;
void void
buffer(char c) { buffer(char c) {
@ -86,17 +79,6 @@ cmd(const char *cmdstr, ...) {
va_end(ap); va_end(ap);
} }
int
getch(ReadBuffer *buf) {
if(buf->i++ >= buf->n) {
buf->n = read(buf->fd, buf->data, BUFSIZ);
if(buf->n == -1)
err(EXIT_FAILURE, "cannot read");
buf->i = 0;
}
return buf->data[buf->i];
}
void void
movea(int x, int y) { movea(int x, int y) {
x = MAX(x, cols); x = MAX(x, cols);
@ -121,10 +103,10 @@ parseesc(void) {
int arg[16]; int arg[16];
memset(arg, 0, LENGTH(arg)); memset(arg, 0, LENGTH(arg));
c = getch(&ptmbuf); c = getc(fptm);
switch(c) { switch(c) {
case '[': case '[':
c = getch(&ptmbuf); c = getc(fptm);
for(j = 0; j < LENGTH(arg);) { for(j = 0; j < LENGTH(arg);) {
if(isdigit(c)) { if(isdigit(c)) {
digit = 1; digit = 1;
@ -146,7 +128,7 @@ parseesc(void) {
} }
break; break;
} }
c = getch(&ptmbuf); c = getc(fptm);
} }
switch(c) { switch(c) {
case '@': case '@':
@ -220,7 +202,7 @@ parseesc(void) {
break; break;
default: default:
putchar('\033'); putchar('\033');
ungetch(&ptmbuf, c); ungetc(c, fptm);
} }
} }
@ -308,13 +290,6 @@ unbuffer(void) {
return c; return c;
} }
void
ungetch(ReadBuffer *buf, int c) {
if(buf->i + 1 >= buf->n)
errx(EXIT_FAILURE, "buffer full");
buf->data[buf->i++] = c;
}
int int
main(int argc, char *argv[]) { main(int argc, char *argv[]) {
fd_set rfds; fd_set rfds;
@ -325,28 +300,31 @@ main(int argc, char *argv[]) {
errx(EXIT_FAILURE, "usage: std [-v]"); errx(EXIT_FAILURE, "usage: std [-v]");
getpty(); getpty();
shell(); shell();
cmdbuf.fd = STDIN_FILENO;
ptmbuf.fd = ptm;
FD_ZERO(&rfds); FD_ZERO(&rfds);
FD_SET(STDIN_FILENO, &rfds); FD_SET(STDIN_FILENO, &rfds);
FD_SET(ptm, &rfds); FD_SET(ptm, &rfds);
if(!(fptm = fdopen(ptm, "r+")))
err(EXIT_FAILURE, "cannot open pty");
if(fcntl(ptm, F_SETFL, O_NONBLOCK) == -1)
err(EXIT_FAILURE, "cannot set pty to non-blocking mode");
if(fcntl(STDIN_FILENO, F_SETFL, O_NONBLOCK) == -1)
err(EXIT_FAILURE, "cannot set stdin to non-blocking mode");
for(;;) { for(;;) {
if(select(ptm + 1, &rfds, NULL, NULL, NULL) == -1) if(select(MAX(ptm, STDIN_FILENO) + 1, &rfds, NULL, NULL, NULL) == -1)
err(EXIT_FAILURE, "cannot select"); err(EXIT_FAILURE, "cannot select");
if(FD_ISSET(STDIN_FILENO, &rfds)) if(FD_ISSET(ptm, &rfds)) {
do { for(;;) {
c = getch(&cmdbuf); if((c = getc(fptm)) == EOF) {
switch(c) { if(feof(fptm)) {
case ':': FD_CLR(ptm, &rfds);
parsecmd(); fflush(fptm);
break; break;
default: }
if(errno != EAGAIN)
err(EXIT_FAILURE, "cannot read from pty");
fflush(stdout);
break; break;
} }
} while(cmdbuf.i < cmdbuf.n);
if(FD_ISSET(ptm, &rfds)) {
do {
c = getch(&ptmbuf);
switch(c) { switch(c) {
case '\033': case '\033':
parseesc(); parseesc();
@ -354,9 +332,32 @@ main(int argc, char *argv[]) {
default: default:
putchar(c); putchar(c);
} }
} while(ptmbuf.i < ptmbuf.n); }
fflush(stdout); fflush(stdout);
} }
if(FD_ISSET(STDIN_FILENO, &rfds)) {
for(;;) {
if((c = getchar()) == EOF) {
if(feof(stdin)) {
FD_CLR(STDIN_FILENO, &rfds);
fflush(fptm);
break;
}
if(errno != EAGAIN)
err(EXIT_FAILURE, "cannot read from stdin");
fflush(fptm);
break;
}
switch(c) {
case ':':
parsecmd();
break;
default:
putc(c, fptm);
}
}
fflush(fptm);
}
} }
return 0; return 0;
} }