mdoc(7) police: remove extraneous .Pp before and/or after .Sh.

[pw-darwin.git] / libutil / pw_util.c

diff --git a/libutil/pw_util.c b/libutil/pw_util.c
index 9873f74c3a3183cd4eb79a3f88a1f7226cb62f6a..ce9eba229afc28937beb2e7b075036ecfb2acaac 100644 (file)
--- a/libutil/pw_util.c
+++ b/libutil/pw_util.c
@@ -32,7 +32,11 @@
  */
 
 #ifndef lint
-static char sccsid[] = "@(#)pw_util.c  8.3 (Berkeley) 4/2/94";
+#if 0
+static const char sccsid[] = "@(#)pw_util.c    8.3 (Berkeley) 4/2/94";
+#endif
+static const char rcsid[] =
+  "$FreeBSD$";
 #endif /* not lint */
 
 /*
@@ -41,13 +45,13 @@ static char sccsid[] = "@(#)pw_util.c       8.3 (Berkeley) 4/2/94";
  */
 
 #include <sys/param.h>
+#include <sys/errno.h>
 #include <sys/time.h>
 #include <sys/resource.h>
 #include <sys/stat.h>
 #include <sys/wait.h>
 
 #include <err.h>
-#include <errno.h>
 #include <fcntl.h>
 #include <paths.h>
 #include <pwd.h>
@@ -60,6 +64,19 @@ static char sccsid[] = "@(#)pw_util.c        8.3 (Berkeley) 4/2/94";
 #include "pw_util.h"
 
 extern char *tempname;
+static pid_t editpid = -1;
+static int lockfd;
+char *mppath = _PATH_PWD;
+char *masterpasswd = _PATH_MASTERPASSWD;
+
+void
+pw_cont(sig)
+       int sig;
+{
+
+       if (editpid != -1)
+               kill(editpid, sig);
+}
 
 void
 pw_init()
@@ -85,40 +102,56 @@ pw_init()
        (void)signal(SIGPIPE, SIG_IGN);
        (void)signal(SIGQUIT, SIG_IGN);
        (void)signal(SIGTERM, SIG_IGN);
-       (void)signal(SIGTSTP, SIG_IGN);
-       (void)signal(SIGTTOU, SIG_IGN);
+       (void)signal(SIGCONT, pw_cont);
 
        /* Create with exact permissions. */
        (void)umask(0);
 }
 
-static int lockfd;
-
 int
 pw_lock()
 {
-       /* 
+       /*
         * If the master password file doesn't exist, the system is hosed.
         * Might as well try to build one.  Set the close-on-exec bit so
         * that users can't get at the encrypted passwords while editing.
         * Open should allow flock'ing the file; see 4.4BSD.    XXX
         */
-       lockfd = open(_PATH_MASTERPASSWD, O_RDONLY, 0);
-       if (lockfd < 0 || fcntl(lockfd, F_SETFD, 1) == -1)
-               err(1, "%s", _PATH_MASTERPASSWD);
-       if (flock(lockfd, LOCK_EX|LOCK_NB))
-               errx(1, "the password db file is busy");
+       for (;;) {
+               struct stat st;
+
+               lockfd = open(masterpasswd, O_RDONLY, 0);
+               if (lockfd < 0 || fcntl(lockfd, F_SETFD, 1) == -1)
+                       err(1, "%s", masterpasswd);
+               if (flock(lockfd, LOCK_EX|LOCK_NB))
+                       errx(1, "the password db file is busy");
+
+               /*
+                * If the password file was replaced while we were trying to
+                * get the lock, our hardlink count will be 0 and we have to
+                * close and retry.
+                */
+               if (fstat(lockfd, &st) < 0)
+                       errx(1, "fstat() failed");
+               if (st.st_nlink != 0)
+                       break;
+               close(lockfd);
+               lockfd = -1;
+       }
        return (lockfd);
 }
 
 int
 pw_tmp()
 {
-       static char path[MAXPATHLEN] = _PATH_MASTERPASSWD;
+       static char path[MAXPATHLEN];
        int fd;
        char *p;
 
-       if (p = strrchr(path, '/'))
+       strncpy(path, masterpasswd, MAXPATHLEN - 1);
+       path[MAXPATHLEN] = '\0';
+
+       if ((p = strrchr(path, '/')))
                ++p;
        else
                p = path;
@@ -130,15 +163,23 @@ pw_tmp()
 }
 
 int
-pw_mkdb()
+pw_mkdb(username)
+char *username;
 {
        int pstat;
        pid_t pid;
 
-       warnx("rebuilding the database...");
        (void)fflush(stderr);
-       if (!(pid = vfork())) {
-               execl(_PATH_PWD_MKDB, "pwd_mkdb", "-p", tempname, NULL);
+       if (!(pid = fork())) {
+               if(!username) {
+                       warnx("rebuilding the database...");
+                       execl(_PATH_PWD_MKDB, "pwd_mkdb", "-p", "-d", mppath,
+                           tempname, (char *)NULL);
+               } else {
+                       warnx("updating the database...");
+                       execl(_PATH_PWD_MKDB, "pwd_mkdb", "-p", "-d", mppath,
+                           "-u", username, tempname, (char *)NULL);
+               }
                pw_error(_PATH_PWD_MKDB, 1, 1);
        }
        pid = waitpid(pid, &pstat, 0);
@@ -153,40 +194,50 @@ pw_edit(notsetuid)
        int notsetuid;
 {
        int pstat;
-       pid_t pid;
        char *p, *editor;
 
        if (!(editor = getenv("EDITOR")))
                editor = _PATH_VI;
-       if (p = strrchr(editor, '/'))
+       if ((p = strrchr(editor, '/')))
                ++p;
-       else 
+       else
                p = editor;
 
-       if (!(pid = vfork())) {
+       if (!(editpid = fork())) {
                if (notsetuid) {
                        (void)setgid(getgid());
                        (void)setuid(getuid());
                }
-               execlp(editor, p, tempname, NULL);
-               _exit(1);
+               errno = 0;
+               execlp(editor, p, tempname, (char *)NULL);
+               _exit(errno);
        }
-       pid = waitpid(pid, (int *)&pstat, 0);
-       if (pid == -1 || !WIFEXITED(pstat) || WEXITSTATUS(pstat) != 0)
-               pw_error(editor, 1, 1);
+       for (;;) {
+               editpid = waitpid(editpid, (int *)&pstat, WUNTRACED);
+               errno = WEXITSTATUS(pstat);
+               if (editpid == -1)
+                       pw_error(editor, 1, 1);
+               else if (WIFSTOPPED(pstat))
+                       raise(WSTOPSIG(pstat));
+               else if (WIFEXITED(pstat) && errno == 0)
+                       break;
+               else
+                       pw_error(editor, 1, 1);
+       }
+       editpid = -1;
 }
 
 void
 pw_prompt()
 {
-       int c;
+       int c, first;
 
        (void)printf("re-edit the password file? [y]: ");
        (void)fflush(stdout);
-       c = getchar();
-       if (c != EOF && c != '\n')
-               while (getchar() != '\n');
-       if (c == 'n')
+       first = c = getchar();
+       while (c != '\n' && c != EOF)
+               c = getchar();
+       if (first == 'n')
                pw_error(NULL, 0, 0);
 }
 
@@ -195,10 +246,21 @@ pw_error(name, err, eval)
        char *name;
        int err, eval;
 {
-       if (err)
-               warn(name);
-
-       warnx("%s: unchanged", _PATH_MASTERPASSWD);
+#ifdef YP
+       extern int _use_yp;
+#endif /* YP */
+       if (err) {
+               if (name != NULL)
+                       warn("%s", name);
+               else
+                       warn(NULL);
+       }
+#ifdef YP
+       if (_use_yp)
+               warnx("NIS information unchanged");
+       else
+#endif /* YP */
+       warnx("%s: unchanged", masterpasswd);
        (void)unlink(tempname);
        exit(eval);
 }