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Check fgets' return value, silent -Wall.

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Obtained from: OpenBSD
This commit is contained in:
Philippe Charnier 1997-07-21 12:04:31 +00:00
parent 342548bf0f
commit 492dbf7344
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=27572
2 changed files with 22 additions and 11 deletions
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12
usr.bin/leave/leave.1
View File

@ -38,7 +38,7 @@
.Nm leave .Nm leave
.Nd remind you when you have to leave .Nd remind you when you have to leave
.Sh SYNOPSIS .Sh SYNOPSIS
.Nm leave .Nm
.Sm off .Sm off
.Oo .Oo
.Op Cm \&+ .Op Cm \&+
@ -52,7 +52,7 @@ have to leave.
You are reminded 5 minutes and 1 minute before the actual You are reminded 5 minutes and 1 minute before the actual
time, at the time, and every minute thereafter. time, at the time, and every minute thereafter.
When you log off, When you log off,
.Nm leave .Nm
exits just before it would have exits just before it would have
printed the next message. printed the next message.
.Pp .Pp
@ -78,16 +78,16 @@ from the current time.
.El .El
.Pp .Pp
If no argument is given, If no argument is given,
.Nm leave .Nm
prompts with "When do you prompts with "When do you
have to leave?". A reply of newline causes have to leave?". A reply of newline causes
.Nm leave .Nm
to exit, to exit,
otherwise the reply is assumed to be a time. otherwise the reply is assumed to be a time.
This form is suitable for inclusion in a This form is suitable for inclusion in a
.Pa .login .Pa .login
or or
.Pa .profile. .Pa .profile .
.Pp .Pp
Leave ignores interrupts, quits, and terminates. Leave ignores interrupts, quits, and terminates.
To get rid of it you should either log off or use To get rid of it you should either log off or use
@ -97,6 +97,6 @@ giving its process id.
.Xr calendar 1 .Xr calendar 1
.Sh HISTORY .Sh HISTORY
The The
.Nm leave .Nm
command appeared in command appeared in
.Bx 3.0 . .Bx 3.0 .

21
usr.bin/leave/leave.c
View File

@ -32,19 +32,27 @@
*/ */
#ifndef lint #ifndef lint
static char copyright[] = static const char copyright[] =
"@(#) Copyright (c) 1980, 1988, 1993\n\ "@(#) Copyright (c) 1980, 1988, 1993\n\
The Regents of the University of California. All rights reserved.\n"; The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */ #endif /* not lint */
#ifndef lint #ifndef lint
#if 0
static char sccsid[] = "@(#)leave.c 8.1 (Berkeley) 6/6/93"; static char sccsid[] = "@(#)leave.c 8.1 (Berkeley) 6/6/93";
#endif
static const char rcsid[] =
"$Id$";
#endif /* not lint */ #endif /* not lint */
#include <sys/param.h> #include <sys/param.h>
#include <sys/time.h> #include <sys/time.h>
#include <stdio.h>
#include <ctype.h> #include <ctype.h>
#include <stdio.h>
#include <unistd.h>
void doalarm __P((u_int));
static void usage __P((void));
/* /*
* leave [[+]hhmm] * leave [[+]hhmm]
@ -53,6 +61,7 @@ static char sccsid[] = "@(#)leave.c 8.1 (Berkeley) 6/6/93";
* Leave prompts for input and goes away if you hit return. * Leave prompts for input and goes away if you hit return.
* It nags you like a mother hen. * It nags you like a mother hen.
*/ */
int
main(argc, argv) main(argc, argv)
int argc; int argc;
char **argv; char **argv;
@ -69,7 +78,7 @@ main(argc, argv)
#define MSG1 "When do you have to leave? " #define MSG1 "When do you have to leave? "
(void)write(1, MSG1, sizeof(MSG1) - 1); (void)write(1, MSG1, sizeof(MSG1) - 1);
cp = fgets(buf, sizeof(buf), stdin); cp = fgets(buf, sizeof(buf), stdin);
if (*cp == '\n') if (cp == NULL || *cp == '\n')
exit(0); exit(0);
} else } else
cp = argv[1]; cp = argv[1];
@ -97,7 +106,7 @@ main(argc, argv)
secs = hours * 60 * 60 + minutes * 60; secs = hours * 60 * 60 + minutes * 60;
else { else {
if (hours > 23 || t->tm_hour > hours || if (hours > 23 || t->tm_hour > hours ||
t->tm_hour == hours && minutes <= t->tm_min) (t->tm_hour == hours && minutes <= t->tm_min))
usage(); usage();
secs = (hours - t->tm_hour) * 60 * 60; secs = (hours - t->tm_hour) * 60 * 60;
secs += (minutes - t->tm_min) * 60; secs += (minutes - t->tm_min) * 60;
@ -106,6 +115,7 @@ main(argc, argv)
exit(0); exit(0);
} }
void
doalarm(secs) doalarm(secs)
u_int secs; u_int secs;
{ {
@ -114,7 +124,7 @@ doalarm(secs)
int pid; int pid;
char *ctime(); char *ctime();
if (pid = fork()) { if ((pid = fork())) {
(void)time(&daytime); (void)time(&daytime);
daytime += secs; daytime += secs;
printf("Alarm set for %.16s. (pid %d)\n", printf("Alarm set for %.16s. (pid %d)\n",
@ -156,6 +166,7 @@ doalarm(secs)
exit(0); exit(0);
} }
static void
usage() usage()
{ {
fprintf(stderr, "usage: leave [[+]hhmm]\n"); fprintf(stderr, "usage: leave [[+]hhmm]\n");