st

my build of st - simple terminal
git clone git://git.kocotian.pl/st.git
Log | Files | Refs | README | LICENSE

commit ad39f000be87ec16e74c05bdc3fa81ef307b5477
parent 2f35cef54b5a32b5498aded0a25f78d0d973a152
Author: Aurélien Aptel <aurelien.aptel@gmail.com>
Date:   Thu, 11 Jun 2009 16:41:14 +0200

added sigchld handler, cleaned error checking.

Diffstat:
Mst.c | 60+++++++++++++++++++++++++++++++++++-------------------------
Mst.h | 7++++++-
2 files changed, 41 insertions(+), 26 deletions(-)

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); 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);