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Add prototypes, staticize, constify, don't shadow global variables and

Browse Source 
functions, remove an unused function, and silence other assorted
warnings.

Set WARNS=2.
This commit is contained in:
Dima Dorfman 2001-07-15 11:03:28 +00:00
parent b91c884fda
commit 8d43ce09fc
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=79759
2 changed files with 60 additions and 54 deletions
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1
usr.sbin/watch/Makefile
View File

@ -1,6 +1,7 @@
# $FreeBSD$
PROG= watch
WARNS?= 2
MAN= watch.8
LDADD+= -ltermcap
DPADD+= ${LIBTERMCAP}

113
usr.sbin/watch/watch.c
View File

@ -18,7 +18,7 @@ static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
#include <sys/types.h>
#include <sys/param.h>
#include <sys/fcntl.h>
#include <sys/filio.h>
#include <sys/snoop.h>
@ -49,6 +49,19 @@ static const char rcsid[] =
#define CHR_SWITCH 24 /* Ctrl+X */
#define CHR_CLEAR 23 /* Ctrl+V */
static void clear __P((void));
static void timestamp __P((const char *));
static void set_tty __P((void));
static void unset_tty __P((void));
static void fatal __P((int, const char *));
static int open_snp __P((void));
static void cleanup __P((int));
static void usage __P((void));
static void setup_scr __P((void));
static void attach_snp __P((void));
static void detach_snp __P((void));
static void set_dev __P((const char *));
static void ask_dev __P((char *, const char *));
int opt_reconn_close = 0;
int opt_reconn_oflow = 0;
@ -65,20 +78,20 @@ int std_in = 0, std_out = 1;
int clear_ok = 0;
struct termios otty;
char tbuf[1024], buf[1024];
char tbuf[1024], gbuf[1024];
void
static void
clear()
{
if (clear_ok)
tputs(buf, 1, putchar);
tputs(gbuf, 1, putchar);
fflush(stdout);
}
void
static void
timestamp(buf)
char *buf;
const char *buf;
{
time_t t;
char btmp[1024];
@ -92,7 +105,7 @@ timestamp(buf)
fflush(stdout);
}
void
static void
set_tty()
{
struct termios ntty;
@ -118,26 +131,26 @@ set_tty()
tcsetattr (std_in, TCSANOW, &ntty);
}
void
static void
unset_tty()
{
tcsetattr (std_in, TCSANOW, &otty);
}
void
fatal(err, buf)
unsigned int err;
char *buf;
static void
fatal(error, buf)
int error;
const char *buf;
{
unset_tty();
if (buf)
errx(err, "fatal: %s", buf);
errx(error, "fatal: %s", buf);
else
exit(err);
exit(error);
}
int
static int
open_snp()
{
char snp[] = {_PATH_DEV "snpX"};
@ -160,8 +173,9 @@ open_snp()
}
void
cleanup()
static void
cleanup(signo)
int signo __unused;
{
if (opt_timestamp)
timestamp("Logging Exited.");
@ -178,10 +192,10 @@ usage()
exit(EX_USAGE);
}
void
static void
setup_scr()
{
char *cbuf = buf, *term;
char *cbuf = gbuf, *term;
if (!opt_interactive)
return;
if ((term = getenv("TERM")))
@ -192,32 +206,16 @@ setup_scr()
clear();
}
int
ctoh(c)
char c;
{
if (c >= '0' && c <= '9')
return (int) (c - '0');
if (c >= 'a' && c <= 'f')
return (int) (c - 'a' + 10);
fatal(EX_DATAERR, "bad tty number");
return (0);
}
void
static void
detach_snp()
{
dev_t dev;
dev = -1;
dev = NODEV;
ioctl(snp_io, SNPSTTY, &dev);
}
void
static void
attach_snp()
{
if (ioctl(snp_io, SNPSTTY, &snp_tty) != 0)
@ -227,9 +225,9 @@ attach_snp()
}
void
static void
set_dev(name)
char *name;
const char *name;
{
char buf[DEV_NAME_LEN];
struct stat sb;
@ -255,8 +253,9 @@ set_dev(name)
}
void
ask_dev(dev_name, msg)
char *dev_name, *msg;
ask_dev(dbuf, msg)
char *dbuf;
const char *msg;
{
char buf[DEV_NAME_LEN];
int len;
@ -266,8 +265,8 @@ ask_dev(dev_name, msg)
if (msg)
printf("%s\n", msg);
if (dev_name)
printf("Enter device name [%s]:", dev_name);
if (dbuf)
printf("Enter device name [%s]:", dbuf);
else
printf("Enter device name:");
@ -276,7 +275,7 @@ ask_dev(dev_name, msg)
if (buf[len - 1] == '\n')
buf[len - 1] = '\0';
if (buf[0] != '\0' && buf[0] != ' ')
strcpy(dev_name, buf);
strcpy(dbuf, buf);
}
set_tty();
}
@ -288,7 +287,8 @@ main(ac, av)
int ac;
char **av;
{
int res, nread, b_size = MIN_SIZE;
int res, idata, rv;
size_t nread, b_size = MIN_SIZE;
char ch, *buf, chb[READB_LEN];
fd_set fd_s;
@ -356,7 +356,8 @@ main(ac, av)
fatal(EX_OSERR, "ioctl(FIONREAD)");
if (nread > READB_LEN)
nread = READB_LEN;
if (read(std_in,chb,nread)!=nread)
rv = read(std_in, chb, nread);
if (rv == -1 || (unsigned)rv != nread)
fatal(EX_IOERR, "read (stdin) failed");
switch (chb[0]) {
@ -372,7 +373,8 @@ main(ac, av)
break;
default:
if (opt_write) {
if (write(snp_io,chb,nread) != nread) {
rv = write(snp_io, chb, nread);
if (rv == -1 || (unsigned)rv != nread) {
detach_snp();
if (opt_no_switch)
fatal(EX_IOERR, "write failed");
@ -386,10 +388,10 @@ main(ac, av)
if (!FD_ISSET(snp_io, &fd_s))
continue;
if ((res = ioctl(snp_io, FIONREAD, &nread)) != 0)
if ((res = ioctl(snp_io, FIONREAD, &idata)) != 0)
fatal(EX_OSERR, "ioctl(FIONREAD)");
switch (nread) {
switch (idata) {
case SNP_OFLOW:
if (opt_reconn_oflow)
attach_snp();
@ -397,7 +399,7 @@ main(ac, av)
ask_dev(dev_name, MSG_OFLOW);
set_dev(dev_name);
} else
cleanup();
cleanup(-1);
case SNP_DETACH:
case SNP_TTYCLOSE:
if (opt_reconn_close)
@ -406,8 +408,9 @@ main(ac, av)
ask_dev(dev_name, MSG_CLOSED);
set_dev(dev_name);
} else
cleanup();
cleanup(-1);
default:
nread = (unsigned)idata;
if (nread < (b_size / 2) && (b_size / 2) > MIN_SIZE) {
free(buf);
if (!(buf = (char *) malloc(b_size / 2)))
@ -420,9 +423,11 @@ main(ac, av)
if (!(buf = (char *) malloc(b_size)))
fatal(EX_UNAVAILABLE, "malloc failed");
}
if (read(snp_io, buf, nread) < nread)
rv = read(snp_io, buf, nread);
if (rv == -1 || (unsigned)rv != nread)
fatal(EX_IOERR, "read failed");
if (write(std_out, buf, nread) < nread)
rv = write(std_out, buf, nread);
if (rv == -1 || (unsigned)rv != nread)
fatal(EX_IOERR, "write failed");
}
} /* While */