X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fshared%2Fpager.c;h=f1f3dc7e7edb41a3c5d9320ffa02b7557efe5217;hb=6156b4779584b4bf1dc973ce988a34a1bcae1db3;hp=aa74bab103de3406aafb3c0bc9e3a02238d9dbc3;hpb=da927ba997d68401563b927f92e6e40e021a8e5c;p=elogind.git
diff --git a/src/shared/pager.c b/src/shared/pager.c
index aa74bab10..f1f3dc7e7 100644
--- a/src/shared/pager.c
+++ b/src/shared/pager.c
@@ -19,7 +19,6 @@
along with systemd; If not, see .
***/
-#include
#include
#include
#include
@@ -28,19 +27,20 @@
#include "pager.h"
#include "util.h"
+#include "process-util.h"
#include "macro.h"
+#include "terminal-util.h"
+#include "signal-util.h"
+#include "copy.h"
static pid_t pager_pid = 0;
noreturn static void pager_fallback(void) {
- ssize_t n;
-
- do {
- n = splice(STDIN_FILENO, NULL, STDOUT_FILENO, NULL, 64*1024, 0);
- } while (n > 0);
+ int r;
- if (n < 0) {
- log_error("Internal pager failed: %m");
+ r = copy_bytes(STDIN_FILENO, STDOUT_FILENO, (off_t) -1, false);
+ if (r < 0) {
+ log_error_errno(r, "Internal pager failed: %m");
_exit(EXIT_FAILURE);
}
@@ -67,35 +67,46 @@ int pager_open(bool jump_to_end) {
* pager so that we get the value from the actual tty */
columns();
- if (pipe(fd) < 0) {
- log_error("Failed to create pager pipe: %m");
- return -errno;
- }
+ if (pipe(fd) < 0)
+ return log_error_errno(errno, "Failed to create pager pipe: %m");
parent_pid = getpid();
pager_pid = fork();
if (pager_pid < 0) {
r = -errno;
- log_error("Failed to fork pager: %m");
+ log_error_errno(errno, "Failed to fork pager: %m");
safe_close_pair(fd);
return r;
}
/* In the child start the pager */
if (pager_pid == 0) {
- const char* less_opts;
+ const char* less_opts, *less_charset;
+
+ (void) reset_all_signal_handlers();
+ (void) reset_signal_mask();
dup2(fd[0], STDIN_FILENO);
safe_close_pair(fd);
+ /* Initialize a good set of less options */
less_opts = getenv("SYSTEMD_LESS");
if (!less_opts)
less_opts = "FRSXMK";
if (jump_to_end)
- less_opts = strappenda(less_opts, " +G");
+ less_opts = strjoina(less_opts, " +G");
setenv("LESS", less_opts, 1);
+ /* Initialize a good charset for less. This is
+ * particularly important if we output UTF-8
+ * characters. */
+ less_charset = getenv("SYSTEMD_LESSCHARSET");
+ if (!less_charset && is_locale_utf8())
+ less_charset = "utf-8";
+ if (less_charset)
+ setenv("LESSCHARSET", less_charset, 1);
+
/* Make sure the pager goes away when the parent dies */
if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0)
_exit(EXIT_FAILURE);
@@ -126,10 +137,10 @@ int pager_open(bool jump_to_end) {
}
/* Return in the parent */
- if (dup2(fd[1], STDOUT_FILENO) < 0) {
- log_error("Failed to duplicate pager pipe: %m");
- return -errno;
- }
+ if (dup2(fd[1], STDOUT_FILENO) < 0)
+ return log_error_errno(errno, "Failed to duplicate pager pipe: %m");
+ if (dup2(fd[1], STDERR_FILENO) < 0)
+ return log_error_errno(errno, "Failed to duplicate pager pipe: %m");
safe_close_pair(fd);
return 1;
@@ -142,6 +153,15 @@ void pager_close(void) {
/* Inform pager that we are done */
fclose(stdout);
+#if defined(__GLIBC__)
+ stdout = NULL;
+#endif // in musl-libc this is a const
+
+ fclose(stderr);
+#if defined(__GLIBC__)
+ stderr = NULL;
+#endif // in musl-libc this is a const
+
kill(pager_pid, SIGCONT);
(void) wait_for_terminate(pager_pid, NULL);
pager_pid = 0;
@@ -151,6 +171,8 @@ bool pager_have(void) {
return pager_pid > 0;
}
+/// UNNEEDED by elogind
+#if 0
int show_man_page(const char *desc, bool null_stdio) {
const char *args[4] = { "man", NULL, NULL, NULL };
char *e = NULL;
@@ -176,13 +198,15 @@ int show_man_page(const char *desc, bool null_stdio) {
args[1] = desc;
pid = fork();
- if (pid < 0) {
- log_error("Failed to fork: %m");
- return -errno;
- }
+ if (pid < 0)
+ return log_error_errno(errno, "Failed to fork: %m");
if (pid == 0) {
/* Child */
+
+ (void) reset_all_signal_handlers();
+ (void) reset_signal_mask();
+
if (null_stdio) {
r = make_null_stdio();
if (r < 0) {
@@ -192,7 +216,7 @@ int show_man_page(const char *desc, bool null_stdio) {
}
execvp(args[0], (char**) args);
- log_error("Failed to execute man: %m");
+ log_error_errno(errno, "Failed to execute man: %m");
_exit(EXIT_FAILURE);
}
@@ -203,3 +227,4 @@ int show_man_page(const char *desc, bool null_stdio) {
log_debug("Exit code %i status %i", status.si_code, status.si_status);
return status.si_status;
}
+#endif // 0