added sigchld handler, cleaned error checking.
This commit is contained in:
Aurélien Aptel
parent
2f35cef54b
commit
ad39f000be
2 changed files with 41 additions and 26 deletions
58
st.c
58
st.c
|
|
@ -1,4 +1,4 @@
|
|||
/* See LICENSE for licence details. */
|
||||
/* See LICENSE for licence details. */
|
||||
#include "st.h"
|
||||
|
||||
/* Globals */
|
||||
|
|
@ -7,6 +7,7 @@ XWindow xw;
|
|||
Term term;
|
||||
Escseq escseq;
|
||||
int cmdfd;
|
||||
pid_t pid;
|
||||
int running;
|
||||
|
||||
void
|
||||
|
|
@ -27,34 +28,45 @@ execsh(void) {
|
|||
}
|
||||
|
||||
void
|
||||
xbell(void) { /* visual bell */
|
||||
xbell(void) { /* visual bell */
|
||||
XRectangle r = { 0, 0, xw.w, xw.h };
|
||||
XSetForeground(xw.dis, dc.gc, dc.col[BellCol]);
|
||||
XFillRectangles(xw.dis, xw.win, dc.gc, &r, 1);
|
||||
usleep(30000);
|
||||
/* usleep(30000); */
|
||||
draw(SCredraw);
|
||||
}
|
||||
|
||||
void
|
||||
sigchld(int a) {
|
||||
int stat = 0;
|
||||
if(waitpid(pid, &stat, 0) < 0)
|
||||
die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
|
||||
if(WIFEXITED(stat))
|
||||
exit(WEXITSTATUS(stat));
|
||||
else
|
||||
exit(EXIT_FAILURE);
|
||||
}
|
||||
|
||||
|
||||
void
|
||||
ttynew(void) {
|
||||
int m, s;
|
||||
pid_t pid;
|
||||
char *pts;
|
||||
|
||||
if((m = posix_openpt(O_RDWR | O_NOCTTY)) < 0)
|
||||
die("openpt");
|
||||
if(grantpt(m) == -1)
|
||||
die("grandpt");
|
||||
if(unlockpt(m) == -1)
|
||||
die("unlockpt");
|
||||
if((pts = ptsname(m)) == NULL)
|
||||
die("ptsname");
|
||||
die("openpt failed: %s\n", SERRNO);
|
||||
if(grantpt(m) < 0)
|
||||
die("grandpt failed: %s\n", SERRNO);
|
||||
if(unlockpt(m) < 0)
|
||||
die("unlockpt failed: %s\n", SERRNO);
|
||||
if(!(pts = ptsname(m)))
|
||||
die("ptsname failed: %s\n", SERRNO);
|
||||
if((s = open(pts, O_RDWR | O_NOCTTY)) < 0)
|
||||
die("slave open");
|
||||
die("Couldn't open slave: %s\n", SERRNO);
|
||||
fcntl(s, F_SETFL, O_NDELAY);
|
||||
switch(pid = fork()) {
|
||||
case -1:
|
||||
die("fork");
|
||||
die("fork failed\n");
|
||||
break;
|
||||
case 0:
|
||||
setsid(); /* create a new process group */
|
||||
|
|
@ -62,12 +74,13 @@ ttynew(void) {
|
|||
dup2(s, STDOUT_FILENO);
|
||||
dup2(s, STDERR_FILENO);
|
||||
if(ioctl(s, TIOCSCTTY, NULL) < 0)
|
||||
die("slave TTIOCSTTY");
|
||||
die("ioctl TTIOCSTTY failed: %s\n", SERRNO);
|
||||
execsh();
|
||||
break;
|
||||
default:
|
||||
close(s);
|
||||
cmdfd = m;
|
||||
signal(SIGCHLD, sigchld);
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -85,9 +98,8 @@ ttyread(void) {
|
|||
int ret;
|
||||
|
||||
switch(ret = read(cmdfd, buf, BUFSIZ)) {
|
||||
case -1: /* error or exit */
|
||||
/* XXX: be more precise */
|
||||
running = 0;
|
||||
case -1:
|
||||
die("Couldn't read from shell: %s\n", SERRNO);
|
||||
break;
|
||||
default:
|
||||
tputs(buf, ret);
|
||||
|
|
@ -97,7 +109,7 @@ ttyread(void) {
|
|||
void
|
||||
ttywrite(char *s, size_t n) {
|
||||
if(write(cmdfd, s, n) == -1)
|
||||
die("write error on tty.");
|
||||
die("write error on tty: %s\n", SERRNO);
|
||||
}
|
||||
|
||||
void
|
||||
|
|
@ -108,7 +120,7 @@ ttyresize(int x, int y) {
|
|||
w.ws_col = term.col;
|
||||
w.ws_xpixel = w.ws_ypixel = 0;
|
||||
if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
|
||||
fprintf(stderr, "Couldn't set window size: %m\n");
|
||||
fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
|
||||
}
|
||||
|
||||
int
|
||||
|
|
@ -889,7 +901,7 @@ run(void) {
|
|||
|
||||
running = 1;
|
||||
XSelectInput(xw.dis, xw.win, ExposureMask | KeyPressMask | StructureNotifyMask);
|
||||
XResizeWindow(xw.dis, xw.win, xw.w , xw.h); /* seems to fix the resize bug in wmii */
|
||||
XResizeWindow(xw.dis, xw.win, xw.w , xw.h); /* fix resize bug in wmii (?) */
|
||||
|
||||
while(running) {
|
||||
FD_ZERO(&rfd);
|
||||
|
|
@ -898,10 +910,8 @@ run(void) {
|
|||
XFlush(xw.dis);
|
||||
ret = select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL);
|
||||
|
||||
if(ret < 0) {
|
||||
fprintf(stderr, "select: %m\n");
|
||||
running = 0;
|
||||
}
|
||||
if(ret < 0)
|
||||
die("select failed: %s\n", SERRNO);
|
||||
|
||||
if(FD_ISSET(xfd, &rfd)) {
|
||||
while(XPending(xw.dis)) {
|
||||
|
|
|
|||
7
st.h
7
st.h
|
|
@ -1,16 +1,19 @@
|
|||
/* See LICENSE for licence details. */
|
||||
#define _XOPEN_SOURCE
|
||||
#include <ctype.h>
|
||||
#include <errno.h>
|
||||
#include <fcntl.h>
|
||||
#include <locale.h>
|
||||
#include <stdarg.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <signal.h>
|
||||
#include <sys/ioctl.h>
|
||||
#include <sys/select.h>
|
||||
#include <sys/stat.h>
|
||||
#include <sys/types.h>
|
||||
#include <sys/wait.h>
|
||||
#include <unistd.h>
|
||||
#include <X11/Xlib.h>
|
||||
#include <X11/keysym.h>
|
||||
|
|
@ -52,6 +55,7 @@ static char* colorname[] = {
|
|||
#define ESCSIZ 256
|
||||
#define ESCARG 16
|
||||
|
||||
#define SERRNO strerror(errno)
|
||||
#define MIN(a, b) ((a) < (b) ? (a) : (b))
|
||||
#define MAX(a, b) ((a) < (b) ? (b) : (a))
|
||||
#define LEN(a) (sizeof(a) / sizeof(a[0]))
|
||||
|
|
@ -63,7 +67,7 @@ static char* colorname[] = {
|
|||
enum { ATnone=0 , ATreverse=1 , ATunderline=2, ATbold=4 }; /* Attribute */
|
||||
enum { CSup, CSdown, CSright, CSleft, CShide, CSdraw, CSwrap, CSsave, CSload }; /* Cursor */
|
||||
enum { CRset=1 , CRupdate=2 }; /* Character state */
|
||||
enum { TMwrap=1 , TMinsert=2 }; /* Terminal mode */
|
||||
enum { TMwrap=1 , TMinsert=2, TMaltcharset }; /* Terminal mode */
|
||||
enum { SCupdate, SCredraw }; /* screen draw mode */
|
||||
|
||||
typedef int Color;
|
||||
|
|
@ -130,6 +134,7 @@ typedef struct {
|
|||
void die(const char *errstr, ...);
|
||||
void draw(int);
|
||||
void execsh(void);
|
||||
void sigchld(int);
|
||||
void kpress(XKeyEvent *);
|
||||
void resize(XEvent *);
|
||||
void run(void);
|
||||
|
|
|
|||
Loading…
Reference in a new issue