Port users(1) to libulog.
Instead of digging through the utmp database by hand, use proper API calls to do so. Instead of parsing entries with a non-empty ut_user, we now look at LOGIN_PROCESS entries.
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@ -3,4 +3,7 @@
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PROG= users
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DPADD= ${LIBULOG}
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LDADD= -lulog
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.include <bsd.prog.mk>
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@ -45,15 +45,16 @@ static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/types.h>
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ulog.h>
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#include <unistd.h>
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#include <utmp.h>
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typedef char namebuf[UT_NAMESIZE];
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typedef char namebuf[MAXLOGNAME];
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int scmp(const void *, const void *);
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static void usage(void);
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@ -65,7 +66,7 @@ main(int argc, char **argv)
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int ncnt = 0;
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int nmax = 0;
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int cnt;
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struct utmp utmp;
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struct ulog_utmpx *ut;
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int ch;
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while ((ch = getopt(argc, argv, "")) != -1)
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@ -77,28 +78,28 @@ main(int argc, char **argv)
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argc -= optind;
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argv += optind;
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if (!freopen(_PATH_UTMP, "r", stdin))
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errx(1, "can't open %s", _PATH_UTMP);
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while (fread((char *)&utmp, sizeof(utmp), 1, stdin) == 1) {
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if (*utmp.ut_name) {
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if (ncnt >= nmax) {
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nmax += 32;
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names = realloc(names, sizeof (*names) * nmax);
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if (!names) {
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errx(1, "realloc");
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/* NOTREACHED */
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}
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ulog_setutxent();
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while ((ut = ulog_getutxent()) != NULL) {
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if (ut->ut_type != LOGIN_PROCESS)
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continue;
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if (ncnt >= nmax) {
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nmax += 32;
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names = realloc(names, sizeof(*names) * nmax);
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if (!names) {
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errx(1, "realloc");
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/* NOTREACHED */
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}
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(void)strncpy(names[ncnt], utmp.ut_name, UT_NAMESIZE);
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++ncnt;
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}
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(void)strlcpy(names[ncnt], ut->ut_user, sizeof(*names));
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++ncnt;
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}
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if (ncnt) {
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qsort(names, ncnt, UT_NAMESIZE, scmp);
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(void)printf("%.*s", UT_NAMESIZE, names[0]);
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ulog_endutxent();
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if (ncnt > 0) {
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qsort(names, ncnt, sizeof(namebuf), scmp);
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(void)printf("%s", names[0]);
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for (cnt = 1; cnt < ncnt; ++cnt)
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if (strncmp(names[cnt], names[cnt - 1], UT_NAMESIZE))
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(void)printf(" %.*s", UT_NAMESIZE, names[cnt]);
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if (strcmp(names[cnt], names[cnt - 1]) != 0)
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(void)printf(" %s", names[cnt]);
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(void)printf("\n");
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}
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exit(0);
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@ -114,5 +115,6 @@ usage(void)
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int
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scmp(const void *p, const void *q)
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{
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return(strncmp(p, q, UT_NAMESIZE));
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return (strcmp(p, q));
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}
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