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Code Issues Releases Wiki Activity

Keep the temp file open instead of re-opening after the editor has exited.

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This commit is contained in:
Todd C. Miller 2004-09-06 16:11:42 +00:00
parent e410bbb589
commit b701107b4e
1 changed files with 16 additions and 17 deletions
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33
sudo_edit.c
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@ -70,12 +70,13 @@ int sudo_edit(argc, argv)
const char *tmpdir;
char **nargv, **ap, *editor, *cp;
char buf[BUFSIZ];
int i, ac, ofd, tfd, nargc, rval;
int i, ac, ofd, nargc, rval;
sigaction_t sa;
struct stat sb;
struct tempfile {
char *tfile;
char *ofile;
int tfd;
time_t omtime; /* XXX - use st_mtimespec / st_mtim? */
off_t osize;
} *tf;
@ -93,13 +94,13 @@ int sudo_edit(argc, argv)
tmpdir = _PATH_TMP;
/*
* For each file specified, by the user, make a tempoary version
* For each file specified by the user, make a temporary version
* and copy the contents of the original to it. We make these files
* as root so the user can't steal them out from under us until we are
* done writing (and at that point the user will be able to edit the
* file anyway).
* XXX - It would be nice to lock the original files but that means
* keeping an fd open for each file.
* keeping an extra fd open for each file.
*/
tf = emalloc2(argc - 1, sizeof(*tf));
memset(tf, 0, (argc - 1) * sizeof(*tf));
@ -135,13 +136,13 @@ int sudo_edit(argc, argv)
else
cp = tf[i].ofile;
easprintf(&tf[i].tfile, "%s%s.XXXXXXXX", tmpdir, cp);
if ((tfd = mkstemp(tf[i].tfile)) == -1) {
if ((tf[i].tfd = mkstemp(tf[i].tfile)) == -1) {
warn("mkstemp");
goto cleanup;
}
if (ofd != -1) {
while ((nread = read(ofd, buf, sizeof(buf))) != 0) {
if ((nwritten = write(tfd, buf, nread)) != nread) {
if ((nwritten = write(tf[i].tfd, buf, nread)) != nread) {
if (nwritten == -1)
warn("%s", tf[i].tfile);
else
@ -149,15 +150,13 @@ int sudo_edit(argc, argv)
goto cleanup;
}
}
close(ofd);
}
#ifdef HAVE_FCHOWN
fchown(tfd, user_uid, user_gid);
fchown(tf[i].tfd, user_uid, user_gid);
#else
chown(tf[i].tfile, user_uid, user_gid);
#endif
if (ofd != -1)
close(ofd);
close(tfd);
touch(tf[i].tfile, tf[i].omtime);
}
if (argc == 1)
@ -214,6 +213,7 @@ int sudo_edit(argc, argv)
(void) sigaction(SIGINT, &saved_sa_int, NULL);
(void) sigaction(SIGQUIT, &saved_sa_quit, NULL);
(void) sigaction(SIGCHLD, &saved_sa_chld, NULL);
closefrom(STDERR_FILENO + 1);
set_perms(PERM_FULL_USER);
execvp(nargv[0], nargv);
warn("unable to execute %s", nargv[0]);
@ -247,21 +247,21 @@ int sudo_edit(argc, argv)
/* Copy contents of temp files to real ones */
for (i = 0; i < argc - 1; i++) {
/* XXX - open file with PERM_USER for nfs? */
if ((tfd = open(tf[i].tfile, O_RDONLY, 0644)) == -1) {
warn("unable to read edited file %s, cannot update %s",
if (lseek(tf[i].tfd, (off_t)0, SEEK_SET) != 0) {
warn("unable to rewind edited file %s, cannot update %s",
tf[i].tfile, tf[i].ofile);
close(tf[i].tfd);
continue;
}
#ifdef HAVE_FSTAT
if (fstat(tfd, &sb) == 0) {
if (fstat(tf[i].tfd, &sb) == 0) {
#else
if (stat(tf[i].tfile, &sb) == 0) {
#endif
if (tf[i].osize == sb.st_size && tf[i].omtime == sb.st_mtime) {
warnx("%s unchanged", tf[i].ofile);
unlink(tf[i].tfile);
close(tfd);
close(tf[i].tfd);
continue;
}
}
@ -271,10 +271,10 @@ int sudo_edit(argc, argv)
if (ofd == -1) {
warn("unable to write to %s", tf[i].ofile);
warnx("contents of edit session left in %s", tf[i].tfile);
close(tfd);
close(tf[i].tfd);
continue;
}
while ((nread = read(tfd, buf, sizeof(buf))) != 0) {
while ((nread = read(tf[i].tfd, buf, sizeof(buf))) != 0) {
if ((nwritten = write(ofd, buf, nread)) != nread) {
if (nwritten == -1)
warn("%s", tf[i].ofile);
@ -290,7 +290,6 @@ int sudo_edit(argc, argv)
warnx("contents of edit session left in %s", tf[i].tfile);
}
close(ofd);
close(tfd);
}
return(rval);