Introduction
Introduction Statistics Contact Development Disclaimer Help
lastlog.c - ubase - suckless linux base utils
git clone git://git.suckless.org/ubase
Log
Files
Refs
README
LICENSE
---
lastlog.c (1555B)
---
1 /* See LICENSE file for copyright and license details. */
2 #include <errno.h>
3 #include <paths.h>
4 #include <pwd.h>
5 #include <stdio.h>
6 #include <stdlib.h>
7 #include <string.h>
8 #include <time.h>
9 #include <utmp.h>
10
11 #include "text.h"
12 #include "util.h"
13
14 #define PASSWD "/etc/passwd"
15
16 static FILE *last;
17
18 static void
19 lastlog(char *user)
20 {
21 struct passwd *pwd;
22 struct lastlog ll;
23 time_t lltime;
24
25 errno = 0;
26 if ((pwd = getpwnam(user)) == NULL) {
27 if (errno)
28 weprintf("getpwnam %s:", user);
29 else
30 weprintf("unknown user: %s\n", user);
31 return;
32 }
33
34 fseek(last, pwd->pw_uid * sizeof(struct lastlog), 0);
35 fread(&ll, sizeof(struct lastlog), 1, last);
36
37 if (ferror(last))
38 eprintf("%s: read error:", _PATH_LASTLOG);
39
40 /* on glibc `ll_time' can be an int32_t with compat32
41 * avoid compiler warning when calling ctime() */
42 lltime = ll.ll_time;
43 printf("%-8.8s %-8.8s %-16.16s %s",
44 user, ll.ll_line, ll.ll_host, ctime(&lltime));
45 }
46
47 int
48 main(int argc, char **argv)
49 {
50 FILE *fp;
51 char *line = NULL, *p;
52 size_t sz = 0;
53
54 if ((last = fopen(_PATH_LASTLOG, "r")) == NULL)
55 eprintf("fopen %s:", _PATH_LASTLOG);
56
57 if (argc > 1) {
58 while (*++argv)
59 lastlog(*argv);
60 } else {
61 if ((fp = fopen(PASSWD, "r")) == NULL)
62 eprintf("fopen %s:", PASSWD);
63 while (agetline(&line, &sz, fp) != -1) {
64 if ((p = strchr(line, ':')) == NULL)
65 eprintf("invalid passwd entry\n");
66 *p = '\0';
67 lastlog(line);
68 }
69 if (fclose(fp))
70 eprintf("fclose %s:", PASSWD);
71 free(line);
72 }
73
74 if (fclose(last))
75 eprintf("fclose %s:", _PATH_LASTLOG);
76
77 return 0;
78 }
You are viewing proxied material from suckless.org. The copyright of proxied material belongs to its original authors. Any comments or complaints in relation to proxied material should be directed to the original authors of the content concerned. Please see the disclaimer for more details.