From 84abb659dfc8aecbdfb19fa868a1bcb920f867ab Mon Sep 17 00:00:00 2001 From: Tom London Date: Sun, 10 Dec 1978 18:36:57 -0500 Subject: [PATCH] Bell 32V development Work on file usr/src/cmd/who.c Co-Authored-By: John Reiser Synthesized-from: 32v --- usr/src/cmd/who.c | 62 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+) create mode 100644 usr/src/cmd/who.c diff --git a/usr/src/cmd/who.c b/usr/src/cmd/who.c new file mode 100644 index 0000000000..27e0b1d4bb --- /dev/null +++ b/usr/src/cmd/who.c @@ -0,0 +1,62 @@ +/* + * who + */ + +#include +#include +#include +struct utmp utmp; +struct passwd *pw; +struct passwd *getpwuid(); + +char *ttyname(), *rindex(), *ctime(), *strcpy(); +main(argc, argv) +char **argv; +{ + register char *tp, *s; + register FILE *fi; + + s = "/etc/utmp"; + if(argc == 2) + s = argv[1]; + if (argc==3) { + tp = ttyname(0); + if (tp) + tp = rindex(tp, '/') + 1; + else { /* no tty - use best guess from passwd file */ + pw = getpwuid(getuid()); + strcpy(utmp.ut_name, pw?pw->pw_name: "?"); + strcpy(utmp.ut_line, "tty??"); + time(&utmp.ut_time); + putline(); + exit(0); + } + } + if ((fi = fopen(s, "r")) == NULL) { + puts("who: cannot open utmp"); + exit(1); + } + while (fread((char *)&utmp, sizeof(utmp), 1, fi) == 1) { + if(argc==3) { + if (strcmp(utmp.ut_line, tp)) + continue; +#ifdef vax + printf("(Vax) "); +#endif + putline(); + exit(0); + } + if(utmp.ut_name[0] == '\0' && argc==1) + continue; + putline(); + } +} + +putline() +{ + register char *cbuf; + + printf("%-8.8s %-8.8s", utmp.ut_name, utmp.ut_line); + cbuf = ctime(&utmp.ut_time); + printf("%.12s\n", cbuf+4); +} -- 2.20.1