added sigchld handler, cleaned error checking. - st - simple terminal
HTML git clone https://git.parazyd.org/st
DIR Log
DIR Files
DIR Refs
DIR README
DIR LICENSE
---
DIR commit ad39f000be87ec16e74c05bdc3fa81ef307b5477
DIR parent 2f35cef54b5a32b5498aded0a25f78d0d973a152
HTML Author: Aurélien Aptel <aurelien.aptel@gmail.com>
Date: Thu, 11 Jun 2009 16:41:14 +0200
added sigchld handler, cleaned error checking.
Diffstat:
M st.c | 60 ++++++++++++++++++-------------
M st.h | 7 ++++++-
2 files changed, 41 insertions(+), 26 deletions(-)
---
DIR diff --git a/st.c b/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);
@@ -898,11 +910,9 @@ 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)) {
XNextEvent(xw.dis, &ev);
DIR diff --git a/st.h b/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);