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w: use utmp headers to determine host size as well

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Completes change in commit ddd15211e0

Signed-off-by: Sami Kerola <kerolasa@iki.fi>
This commit is contained in:
Sami Kerola 2012-03-03 11:38:52 +01:00
parent ddd15211e0
commit abd9e0f6e2
1 changed files with 6 additions and 10 deletions
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16
w.c
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@ -67,10 +67,6 @@ typedef struct utmp utmp_t;
# define FROM_STRING "off"
#endif
/* Arbitary setting, not too big for the screen, max host size */
#define HOSTSZ 40
/*
* This routine is careful since some programs leave utmp strings
* unprintable. Always outputs at least 16 chars padded with
@ -249,7 +245,7 @@ static void showinfo(utmp_t * u, int formtype, int maxcmd, int from,
char uname[UT_NAMESIZE + 1] = "", tty[5 + UT_LINESIZE + 1] = "/dev/";
const proc_t *best;
for (i = 0; i < sizeof(u->ut_line); i++)
for (i = 0; i < UT_LINESIZE; i++)
/* clean up tty if garbled */
if (isalnum(u->ut_line[i]) || (u->ut_line[i] == '/'))
tty[i + 5] = u->ut_line[i];
@ -273,7 +269,7 @@ static void showinfo(utmp_t * u, int formtype, int maxcmd, int from,
if (formtype) {
printf("%-*.*s%-9.8s", userlen + 1, userlen, uname, u->ut_line);
if (from)
print_host(u->ut_host, sizeof u->ut_host, fromlen);
print_host(u->ut_host, UT_HOSTSIZE, fromlen);
print_logintime(u->ut_time, stdout);
if (*u->ut_line == ':')
/* idle unknown for xdm logins */
@ -293,7 +289,7 @@ static void showinfo(utmp_t * u, int formtype, int maxcmd, int from,
printf("%-*.*s%-9.8s", userlen + 1, userlen, u->ut_user,
u->ut_line);
if (from)
print_host(u->ut_host, sizeof u->ut_host, fromlen);
print_host(u->ut_host, UT_HOSTSIZE, fromlen);
if (*u->ut_line == ':')
/* idle unknown for xdm logins */
printf(" ?xdm? ");
@ -401,7 +397,7 @@ int main(int argc, char **argv)
/* Get user field length from environment */
if ((env_var = getenv("PROCPS_USERLEN")) != NULL) {
userlen = atoi(env_var);
if (userlen < 8 || userlen > UT_NAMESIZE) {
if (userlen < 8 || UT_NAMESIZE < userlen) {
xwarnx
(_("User length environment PROCPS_USERLEN must be between 8 and %zu, ignoring.\n"),
UT_NAMESIZE);
@ -411,10 +407,10 @@ int main(int argc, char **argv)
/* Get from field length from environment */
if ((env_var = getenv("PROCPS_FROMLEN")) != NULL) {
fromlen = atoi(env_var);
if (fromlen < 8 || fromlen > HOSTSZ) {
if (fromlen < 8 || UT_HOSTSIZE < fromlen) {
xwarnx
(_("from length environment PROCPS_FROMLEN must be between 8 and %d, ignoring\n"),
HOSTSZ);
UT_HOSTSIZE);
fromlen = 16;
}
}