usign-exec: do not close stdin and stderr before exec

FDs 0, 1 and 2 should always be available. This also allows the exec error
message in the forked process to be displayed.

Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>

diff --git a/usign-exec.c b/usign-exec.c
index 22fdc14e7ebb956a7cd155f94c5992f9edff9248..436c627356b0f79d64cdc68f475fd266357263e5 100644 (file)
--- a/usign-exec.c
+++ b/usign-exec.c
@@ -46,7 +46,7 @@ int _usign_key_is_revoked(const char *fingerprint, const char *pubkeydir) {
 #ifdef UCERT_FULL
 /*
  * call usign -S ...
- * return WEXITSTATUS or -1 if fork or execv fails
+ * return WEXITSTATUS or -1 if fork fails
  */
 int usign_s(const char *msgfile, const char *seckeyfile, const char *sigfile, bool quiet) {
        pid_t pid;
@@ -92,7 +92,7 @@ int usign_s(const char *msgfile, const char *seckeyfile, const char *sigfile, bo
 
 /*
  * call usign -F ... and set fingerprint returned
- * return WEXITSTATUS or -1 if fork or execv fails
+ * return WEXITSTATUS or -1 if fork fails
  */
 static int usign_f(char *fingerprint, const char *pubkeyfile, const char *seckeyfile, const char *sigfile, bool quiet) {
        int fds[2];
@@ -130,8 +130,6 @@ static int usign_f(char *fingerprint, const char *pubkeyfile, const char *seckey
        case 0:
                dup2(fds[1], 1);
 
-               close(0);
-               close(2);
                close(fds[0]);
                close(fds[1]);
 
@@ -185,7 +183,7 @@ int usign_f_sig(char *fingerprint, const char *sigfile, bool quiet) {
 
 /*
  * call usign -V ...
- * return WEXITSTATUS or -1 if fork or execv fails
+ * return WEXITSTATUS or -1 if fork fails
  */
 int usign_v(const char *msgfile, const char *pubkeyfile,
            const char *pubkeydir, const char *sigfile, bool quiet) {