#include <unistd.h>
#include <utmp.h>
#include <errno.h>
-#include <ctype.h>
#include <time.h>
#include <pwd.h>
#include <string.h>
#include <signal.h>
#include <sys/param.h>
#include <sys/stat.h>
-#include <sys/file.h>
-#include <sys/time.h>
#include <paths.h>
+#include <asm/param.h>
#include <getopt.h>
-#include "pathnames.h"
+#include "c.h"
#include "carefulputc.h"
#include "nls.h"
-
+
+static void __attribute__ ((__noreturn__)) usage(FILE * out);
void search_utmp(char *, char *, char *, uid_t);
void do_write(char *, char *, uid_t);
void wr_fputs(char *);
-static void done(int);
+static void __attribute__ ((__noreturn__)) done(int);
int term_chk(char *, int *, time_t *, int);
int utmp_chk(char *, char *);
exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS);
}
-int
-main(int argc, char **argv) {
+int main(int argc, char **argv)
+{
time_t atime;
uid_t myuid;
int msgsok, myttyfd, c;
myttyfd = fileno(stdout);
else if (isatty(fileno(stderr)))
myttyfd = fileno(stderr);
- else {
- myttyfd = -1;
- }
+ else
+ myttyfd = -1;
+
if (myttyfd != -1) {
- if (!(mytty = ttyname(myttyfd))) {
- (void)fprintf(stderr, _("write: can't find your tty's name\n"));
- exit(1);
- }
- /* We may have /dev/ttyN but also /dev/pts/xx.
- Below, term_chk() will put "/dev/" in front, so remove that part. */
- if (!strncmp(mytty, "/dev/", 5))
- mytty += 5;
- if (term_chk(mytty, &msgsok, &atime, 1))
- exit(1);
- if (!msgsok) {
- (void)fprintf(stderr,
- _("write: you have write permission turned off.\n"));
- exit(1);
- }
-
- } else {
- mytty = "<no tty>";
- }
+ if (!(mytty = ttyname(myttyfd)))
+ errx(EXIT_FAILURE,
+ _("can't find your tty's name"));
+
+ /*
+ * We may have /dev/ttyN but also /dev/pts/xx. Below,
+ * term_chk() will put "/dev/" in front, so remove that
+ * part.
+ */
+ if (!strncmp(mytty, "/dev/", 5))
+ mytty += 5;
+ if (term_chk(mytty, &msgsok, &atime, 1))
+ exit(EXIT_FAILURE);
+ if (!msgsok)
+ errx(EXIT_FAILURE,
+ _("you have write permission turned off."));
+
+ } else
+ mytty = "<no tty>";
myuid = getuid();
case 3:
if (!strncmp(argv[2], "/dev/", 5))
argv[2] += 5;
- if (utmp_chk(argv[1], argv[2])) {
- (void)fprintf(stderr,
- _("write: %s is not logged in on %s.\n"),
- argv[1], argv[2]);
- exit(1);
- }
+ if (utmp_chk(argv[1], argv[2]))
+ errx(EXIT_FAILURE,
+ _("%s is not logged in on %s."),
+ argv[1], argv[2]);
if (term_chk(argv[2], &msgsok, &atime, 1))
- exit(1);
- if (myuid && !msgsok) {
- (void)fprintf(stderr,
- _("write: %s has messages disabled on %s\n"),
- argv[1], argv[2]);
- exit(1);
- }
+ exit(EXIT_FAILURE);
+ if (myuid && !msgsok)
+ errx(EXIT_FAILURE,
+ _("%s has messages disabled on %s"),
+ argv[1], argv[2]);
do_write(argv[2], mytty, myuid);
break;
default:
usage(stderr);
}
+
done(0);
/* NOTREACHED */
- return 0;
+ return EXIT_FAILURE;
}
* the given tty
*/
int utmp_chk(char *user, char *tty)
-
{
struct utmp u;
struct utmp *uptr;
}
endutent();
- return(res);
+ return res;
}
/*
* writing from, unless that's the only terminal with messages enabled.
*/
void search_utmp(char *user, char *tty, char *mytty, uid_t myuid)
-
{
struct utmp u;
struct utmp *uptr;
memcpy(&u, uptr, sizeof(u));
if (strncmp(user, u.ut_name, sizeof(u.ut_name)) == 0) {
++nloggedttys;
- (void)strncpy(atty, u.ut_line, sizeof(u.ut_line));
+ strncpy(atty, u.ut_line, sizeof(u.ut_line));
atty[sizeof(u.ut_line)] = '\0';
if (term_chk(atty, &msgsok, &atime, 0))
- continue; /* bad term? skip */
+ /* bad term? skip */
+ continue;
if (myuid && !msgsok)
- continue; /* skip ttys with msgs off */
+ /* skip ttys with msgs off */
+ continue;
if (strcmp(atty, mytty) == 0) {
user_is_me = 1;
- continue; /* don't write to yourself */
+ /* don't write to yourself */
+ continue;
}
- if (u.ut_type != USER_PROCESS)
- continue; /* it's not a valid entry */
+ if (u.ut_type != USER_PROCESS)
+ /* it's not a valid entry */
+ continue;
++nttys;
if (atime > bestatime) {
bestatime = atime;
- (void)strcpy(tty, atty);
+ strcpy(tty, atty);
}
}
}
endutent();
- if (nloggedttys == 0) {
- (void)fprintf(stderr, _("write: %s is not logged in\n"), user);
- exit(1);
- }
+ if (nloggedttys == 0)
+ errx(EXIT_FAILURE, _("%s is not logged in"), user);
if (nttys == 0) {
- if (user_is_me) { /* ok, so write to yourself! */
- (void)strcpy(tty, mytty);
+ if (user_is_me) {
+ /* ok, so write to yourself! */
+ strcpy(tty, mytty);
return;
}
- (void)fprintf(stderr,
- _("write: %s has messages disabled\n"), user);
- exit(1);
+ errx(EXIT_FAILURE, _("%s has messages disabled"), user);
} else if (nttys > 1) {
- (void)fprintf(stderr,
- _("write: %s is logged in more than once; writing to %s\n"),
- user, tty);
+ warnx(_("%s is logged in more than once; writing to %s"),
+ user, tty);
}
}
* term_chk - check that a terminal exists, and get the message bit
* and the access time
*/
-int term_chk(char *tty, int *msgsokP, time_t *atimeP, int showerror)
-
+int term_chk(char *tty, int *msgsokP, time_t * atimeP, int showerror)
{
struct stat s;
char path[MAXPATHLEN];
if (strlen(tty) + 6 > sizeof(path))
- return(1);
- (void)sprintf(path, "/dev/%s", tty);
+ return 1;
+ sprintf(path, "/dev/%s", tty);
if (stat(path, &s) < 0) {
if (showerror)
- (void)fprintf(stderr,
- "write: %s: %s\n", path, strerror(errno));
- return(1);
+ warn("%s", path);
+ return 1;
}
/* group write bit and group ownership */
*msgsokP = (s.st_mode & (S_IWRITE >> 3)) && myegid == s.st_gid;
*atimeP = s.st_atime;
- return(0);
+ return 0;
}
/*
* do_write - actually make the connection
*/
-void do_write(char *tty, char *mytty, uid_t myuid) {
+void do_write(char *tty, char *mytty, uid_t myuid)
+{
char *login, *pwuid, *nows;
struct passwd *pwd;
time_t now;
login = pwuid;
if (strlen(tty) + 6 > sizeof(path))
- exit(1);
- (void)sprintf(path, "/dev/%s", tty);
- if ((freopen(path, "w", stdout)) == NULL) {
- (void)fprintf(stderr, "write: %s: %s\n",
- path, strerror(errno));
- exit(1);
- }
+ errx(EXIT_FAILURE, _("tty path %s too long"), tty);
+ printf(path, "/dev/%s", tty);
+ if ((freopen(path, "w", stdout)) == NULL)
+ err(EXIT_FAILURE, "%s", path);
- (void)signal(SIGINT, done);
- (void)signal(SIGHUP, done);
+ signal(SIGINT, done);
+ signal(SIGHUP, done);
/* print greeting */
if (gethostname(host, sizeof(host)) < 0)
- (void)strcpy(host, "???");
- now = time((time_t *)NULL);
+ strcpy(host, "???");
+ now = time((time_t *) NULL);
nows = ctime(&now);
nows[16] = '\0';
printf("\r\n\007\007\007");
if (strcmp(login, pwuid))
- (void)printf(_("Message from %s@%s (as %s) on %s at %s ..."),
- login, host, pwuid, mytty, nows + 11);
+ printf(_("Message from %s@%s (as %s) on %s at %s ..."),
+ login, host, pwuid, mytty, nows + 11);
else
- (void)printf(_("Message from %s@%s on %s at %s ..."),
- login, host, mytty, nows + 11);
+ printf(_("Message from %s@%s on %s at %s ..."),
+ login, host, mytty, nows + 11);
printf("\r\n");
while (fgets(line, sizeof(line), stdin) != NULL)
/*
* done - cleanup and exit
*/
-static void
-done(int dummy) {
- (void)printf("EOF\r\n");
- _exit(0);
+static void __attribute__ ((__noreturn__))
+ done(int dummy __attribute__ ((__unused__)))
+{
+ printf("EOF\r\n");
+ _exit(EXIT_SUCCESS);
}
/*
* wr_fputs - like fputs(), but makes control characters visible and
* turns \n into \r\n.
*/
-void
-wr_fputs(char *s) {
+void wr_fputs(char *s)
+{
char c;
-#define PUTC(c) if (carefulputc(c,stdout) == EOF) goto err;
-
- while(*s) {
+#define PUTC(c) if (carefulputc(c, stdout) == EOF) \
+ err(EXIT_FAILURE, _("carefulputc failed"));
+ while (*s) {
c = *s++;
if (c == '\n')
PUTC('\r');
PUTC(c);
}
return;
-
-err:
- fprintf(stderr, "write: %s\n", strerror(errno));
- exit(1);
#undef PUTC
}
projects / thirdparty / util-linux.git / commitdiff
