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author | Mark Johnston <markj@FreeBSD.org> | 2020-09-01 15:15:09 +0000 |
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committer | Mark Johnston <markj@FreeBSD.org> | 2020-09-01 15:15:09 +0000 |
commit | d39094af97e61b4f863744f5cf43ad37d28898c3 (patch) | |
tree | 4fc8c5f458ada6a2d0e9a4a4b7687294bf89e7d7 | |
parent | 0352161ff390269df8d9a0bf9df8bf76de7e879e (diff) | |
download | pw-darwin-d39094af97e61b4f863744f5cf43ad37d28898c3.tar.gz pw-darwin-d39094af97e61b4f863744f5cf43ad37d28898c3.tar.zst pw-darwin-d39094af97e61b4f863744f5cf43ad37d28898c3.zip |
pw: Handle errors from ftell() when removing records from /etc/opiekeys.
Reported by: Coverity
MFC after: 1 week
Sponsored by: NetApp, Inc.
Sponsored by: Klara, Inc.
-rw-r--r-- | pw/pw_user.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/pw/pw_user.c b/pw/pw_user.c index cb95d45..2eec317 100644 --- a/pw/pw_user.c +++ b/pw/pw_user.c @@ -712,24 +712,24 @@ rmopie(char const * name) { char tmp[1014]; FILE *fp; - int fd; size_t len; - off_t atofs = 0; - + long atofs; + int fd; + if ((fd = openat(conf.rootfd, "etc/opiekeys", O_RDWR)) == -1) return; fp = fdopen(fd, "r+"); len = strlen(name); - while (fgets(tmp, sizeof(tmp), fp) != NULL) { + for (atofs = 0; fgets(tmp, sizeof(tmp), fp) != NULL && atofs >= 0; + atofs = ftell(fp)) { if (strncmp(name, tmp, len) == 0 && tmp[len]==' ') { /* Comment username out */ if (fseek(fp, atofs, SEEK_SET) == 0) fwrite("#", 1, 1, fp); break; } - atofs = ftell(fp); } /* * If we got an error of any sort, don't update! |