[hackers] [st] Limit usage of extern to config.h globals || Devin J. Pohly
commit 30683c70ab62fd37b5921cf72077b9aef2cb842e
Author: Devin J. Pohly <djpohly_AT_gmail.com>
AuthorDate: Sat Feb 24 16:16:12 2018 -0600
Commit: Devin J. Pohly <djpohly_AT_gmail.com>
CommitDate: Sun Feb 25 21:56:26 2018 -0600
Limit usage of extern to config.h globals
Prefer passing arguments to declaring external global variables. The
only remaining usage of extern is for config.h variables which are
needed in st.c instead of x.c (where it is now included).
Signed-off-by: Devin J. Pohly <djpohly_AT_gmail.com>
diff --git a/config.def.h b/config.def.h
index 616616a..82b1b09 100644
--- a/config.def.h
+++ b/config.def.h
_AT_@ -16,7 +16,7 @@ static int borderpx = 2;
* 4: value of shell in /etc/passwd
* 5: value of shell in config.h
*/
-char *shell = "/bin/sh";
+static char *shell = "/bin/sh";
char *utmp = NULL;
char *stty_args = "stty raw pass8 nl -echo -iexten -cstopb 38400";
diff --git a/st.c b/st.c
index da832ed..ce32cc0 100644
--- a/st.c
+++ b/st.c
_AT_@ -136,8 +136,7 @@ typedef struct {
int narg; /* nb of args */
} STREscape;
-
-static void execsh(char **);
+static void execsh(char *, char **);
static void stty(char **);
static void sigchld(int);
static void ttywriteraw(const char *, size_t);
_AT_@ -201,15 +200,13 @@ static char *base64dec(const char *);
static ssize_t xwrite(int, const char *, size_t);
/* Globals */
-int cmdfd;
-pid_t pid;
-int oldbutton = 3; /* button event on startup: 3 = release */
-
static Term term;
static Selection sel;
static CSIEscape csiescseq;
static STREscape strescseq;
static int iofd = 1;
+static int cmdfd;
+static pid_t pid;
static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
_AT_@ -659,7 +656,7 @@ die(const char *errstr, ...)
}
void
-execsh(char **args)
+execsh(char *cmd, char **args)
{
char *sh, *prog;
const struct passwd *pw;
_AT_@ -673,7 +670,7 @@ execsh(char **args)
}
if ((sh = getenv("SHELL")) == NULL)
- sh = (pw->pw_shell[0]) ? pw->pw_shell : shell;
+ sh = (pw->pw_shell[0]) ? pw->pw_shell : cmd;
if (args)
prog = args[0];
_AT_@ -745,8 +742,8 @@ stty(char **args)
perror("Couldn't call stty");
}
-void
-ttynew(char *line, char *out, char **args)
+int
+ttynew(char *line, char *cmd, char *out, char **args)
{
int m, s;
_AT_@ -765,7 +762,7 @@ ttynew(char *line, char *out, char **args)
die("open line failed: %s\n", strerror(errno));
dup2(cmdfd, 0);
stty(args);
- return;
+ return cmdfd;
}
/* seems to work fine on linux, openbsd and freebsd */
_AT_@ -786,7 +783,7 @@ ttynew(char *line, char *out, char **args)
die("ioctl TIOCSCTTY failed: %s\n", strerror(errno));
close(s);
close(m);
- execsh(args);
+ execsh(cmd, args);
break;
default:
close(s);
_AT_@ -794,6 +791,7 @@ ttynew(char *line, char *out, char **args)
signal(SIGCHLD, sigchld);
break;
}
+ return cmdfd;
}
size_t
_AT_@ -916,6 +914,13 @@ ttyresize(int tw, int th)
fprintf(stderr, "Couldn't set window size: %s\n", strerror(errno));
}
+void
+ttyhangup()
+{
+ /* Send SIGHUP to shell */
+ kill(pid, SIGHUP);
+}
+
int
tattrset(int attr)
{
diff --git a/st.h b/st.h
index b5bc1b5..0a7472b 100644
--- a/st.h
+++ b/st.h
_AT_@ -125,7 +125,8 @@ int tattrset(int);
void tnew(int, int);
void tresize(int, int);
void tsetdirtattr(int);
-void ttynew(char *, char *, char **);
+void ttyhangup(void);
+int ttynew(char *, char *, char *, char **);
size_t ttyread(void);
void ttyresize(int, int);
void ttywrite(const char *, size_t, int);
_AT_@ -147,13 +148,7 @@ void *xmalloc(size_t);
void *xrealloc(void *, size_t);
char *xstrdup(char *);
-/* Globals */
-extern int cmdfd;
-extern pid_t pid;
-extern int oldbutton;
-
/* config.h globals */
-extern char *shell;
extern char *utmp;
extern char *stty_args;
extern char *vtiden;
diff --git a/x.c b/x.c
index 873ff08..970d6dd 100644
--- a/x.c
+++ b/x.c
_AT_@ -227,6 +227,8 @@ static char *opt_line = NULL;
static char *opt_name = NULL;
static char *opt_title = NULL;
+static int oldbutton = 3; /* button event on startup: 3 = release */
+
void
clipcopy(const Arg *dummy)
{
_AT_@ -1733,8 +1735,7 @@ cmessage(XEvent *e)
win.mode &= ~MODE_FOCUSED;
}
} else if (e->xclient.data.l[0] == xw.wmdeletewin) {
- /* Send SIGHUP to shell */
- kill(pid, SIGHUP);
+ ttyhangup();
exit(0);
}
}
_AT_@ -1755,6 +1756,7 @@ run(void)
int w = win.w, h = win.h;
fd_set rfd;
int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
+ int ttyfd;
struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
long deltatime;
_AT_@ -1774,7 +1776,7 @@ run(void)
}
} while (ev.type != MapNotify);
- ttynew(opt_line, opt_io, opt_cmd);
+ ttyfd = ttynew(opt_line, shell, opt_io, opt_cmd);
cresize(w, h);
clock_gettime(CLOCK_MONOTONIC, &last);
_AT_@ -1782,15 +1784,15 @@ run(void)
for (xev = actionfps;;) {
FD_ZERO(&rfd);
- FD_SET(cmdfd, &rfd);
+ FD_SET(ttyfd, &rfd);
FD_SET(xfd, &rfd);
- if (pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
+ if (pselect(MAX(xfd, ttyfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
if (errno == EINTR)
continue;
die("select failed: %s\n", strerror(errno));
}
- if (FD_ISSET(cmdfd, &rfd)) {
+ if (FD_ISSET(ttyfd, &rfd)) {
ttyread();
if (blinktimeout) {
blinkset = tattrset(ATTR_BLINK);
_AT_@ -1834,7 +1836,7 @@ run(void)
if (xev && !FD_ISSET(xfd, &rfd))
xev--;
- if (!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
+ if (!FD_ISSET(ttyfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
if (blinkset) {
if (TIMEDIFF(now, lastblink) \
> blinktimeout) {
Received on Fri Mar 09 2018 - 15:37:40 CET
This archive was generated by hypermail 2.3.0
: Fri Mar 09 2018 - 15:51:06 CET