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authorZbigniew Jedrzejewski-Szmek <zbyszek@in.waw.pl>2012-07-20 09:06:26 +0200
committerZbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>2012-07-23 17:57:11 +0200
commitfafb6eccc2c9e3f8d6ce0aad9cb428f8cc402b24 (patch)
tree1cf54ff0d9fa2a6d5cf36b13d8511caa0b5fc4c8 /src/shared
parentf84b1a8c3aff81c9d80f47943e116e205c884565 (diff)
journalctl: fix ellipsization with PAGER=cat
There are other reasons for not opening the pager then the --no-pager or --follow options (described below). If the pager is not used, messages must be ellipsized. On Fri, Jul 20, 2012 at 05:42:44AM +0000, Shawn Landen wrote: > "Pager to use when --no-pager is not given; overrides $PAGER. > Setting this to an empty string or the value cat is equivalent to passing --no-pager."
Diffstat (limited to 'src/shared')
-rw-r--r--src/shared/pager.c17
-rw-r--r--src/shared/pager.h4
2 files changed, 13 insertions, 8 deletions
diff --git a/src/shared/pager.c b/src/shared/pager.c
index 6a85af33c4..36b409c070 100644
--- a/src/shared/pager.c
+++ b/src/shared/pager.c
@@ -44,20 +44,20 @@ _noreturn_ static void pager_fallback(void) {
_exit(EXIT_SUCCESS);
}
-void pager_open(void) {
+bool pager_open(void) {
int fd[2];
const char *pager;
pid_t parent_pid;
if (pager_pid > 0)
- return;
+ return false;
if ((pager = getenv("SYSTEMD_PAGER")) || (pager = getenv("PAGER")))
if (!*pager || streq(pager, "cat"))
- return;
+ return false;
if (isatty(STDOUT_FILENO) <= 0)
- return;
+ return false;
/* Determine and cache number of columns before we spawn the
* pager so that we get the value from the actual tty */
@@ -65,7 +65,7 @@ void pager_open(void) {
if (pipe(fd) < 0) {
log_error("Failed to create pager pipe: %m");
- return;
+ return false;
}
parent_pid = getpid();
@@ -74,7 +74,7 @@ void pager_open(void) {
if (pager_pid < 0) {
log_error("Failed to fork pager: %m");
close_pipe(fd);
- return;
+ return false;
}
/* In the child start the pager */
@@ -115,10 +115,13 @@ void pager_open(void) {
}
/* Return in the parent */
- if (dup2(fd[1], STDOUT_FILENO) < 0)
+ if (dup2(fd[1], STDOUT_FILENO) < 0) {
log_error("Failed to duplicate pager pipe: %m");
+ return false;
+ }
close_pipe(fd);
+ return true;
}
void pager_close(void) {
diff --git a/src/shared/pager.h b/src/shared/pager.h
index dcd61957ef..0b4afc04b8 100644
--- a/src/shared/pager.h
+++ b/src/shared/pager.h
@@ -21,5 +21,7 @@
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
-void pager_open(void);
+#include <stdbool.h>
+
+bool pager_open(void);
void pager_close(void);