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authorTom Gundersen <teg@jklm.no>2015-06-28 23:42:52 +0200
committerTom Gundersen <teg@jklm.no>2015-06-29 19:51:04 +0200
commitbbf35206735f97cf3fcda8d26982b35b0cad20a9 (patch)
tree22c7f66a5ea8f058e56929085c63216399a2a8e5
parent1cf34d7118e93f0734a52d0eb09f238cf9962b85 (diff)
udev: event - simplify udev_event_spawn() logic
Push the extraction of the envp + argv as close as possible to their use, to avoid code duplication. As a sideeffect fix logging when delaing execution.
-rw-r--r--src/udev/udev-event.c50
-rw-r--r--src/udev/udev-rules.c11
-rw-r--r--src/udev/udev.h3
3 files changed, 28 insertions, 36 deletions
diff --git a/src/udev/udev-event.c b/src/udev/udev-event.c
index 1092071e26..4761222786 100644
--- a/src/udev/udev-event.c
+++ b/src/udev/udev-event.c
@@ -721,19 +721,13 @@ int udev_event_spawn(struct udev_event *event,
usec_t timeout_usec,
usec_t timeout_warn_usec,
bool accept_failure,
- const char *cmd, char **envp,
+ const char *cmd,
char *result, size_t ressize) {
int outpipe[2] = {-1, -1};
int errpipe[2] = {-1, -1};
pid_t pid;
- char arg[UTIL_PATH_SIZE];
- char *argv[128];
- char program[UTIL_PATH_SIZE];
int err = 0;
- strscpy(arg, sizeof(arg), cmd);
- udev_build_argv(event->udev, arg, NULL, argv);
-
/* pipes from child to parent */
if (result != NULL || log_get_max_level() >= LOG_INFO) {
if (pipe2(outpipe, O_NONBLOCK) != 0) {
@@ -750,15 +744,14 @@ int udev_event_spawn(struct udev_event *event,
}
}
- /* allow programs in /usr/lib/udev/ to be called without the path */
- if (argv[0][0] != '/') {
- strscpyl(program, sizeof(program), UDEVLIBEXECDIR "/", argv[0], NULL);
- argv[0] = program;
- }
-
pid = fork();
switch(pid) {
case 0:
+ {
+ char arg[UTIL_PATH_SIZE];
+ char *argv[128];
+ char program[UTIL_PATH_SIZE];
+
/* child closes parent's ends of pipes */
if (outpipe[READ_END] >= 0) {
close(outpipe[READ_END]);
@@ -769,12 +762,22 @@ int udev_event_spawn(struct udev_event *event,
errpipe[READ_END] = -1;
}
+ strscpy(arg, sizeof(arg), cmd);
+ udev_build_argv(event->udev, arg, NULL, argv);
+
+ /* allow programs in /usr/lib/udev/ to be called without the path */
+ if (argv[0][0] != '/') {
+ strscpyl(program, sizeof(program), UDEVLIBEXECDIR "/", argv[0], NULL);
+ argv[0] = program;
+ }
+
log_debug("starting '%s'", cmd);
- spawn_exec(event, cmd, argv, envp,
+ spawn_exec(event, cmd, argv, udev_device_get_properties_envp(event->dev),
outpipe[WRITE_END], errpipe[WRITE_END]);
- _exit(2 );
+ _exit(2);
+ }
case -1:
log_error_errno(errno, "fork of '%s' failed: %m", cmd);
err = -1;
@@ -934,26 +937,21 @@ void udev_event_execute_run(struct udev_event *event, usec_t timeout_usec, usec_
struct udev_list_entry *list_entry;
udev_list_entry_foreach(list_entry, udev_list_get_entry(&event->run_list)) {
+ char command[UTIL_PATH_SIZE];
const char *cmd = udev_list_entry_get_name(list_entry);
enum udev_builtin_cmd builtin_cmd = udev_list_entry_get_num(list_entry);
- if (builtin_cmd < UDEV_BUILTIN_MAX) {
- char command[UTIL_PATH_SIZE];
+ udev_event_apply_format(event, cmd, command, sizeof(command));
- udev_event_apply_format(event, cmd, command, sizeof(command));
+ if (builtin_cmd < UDEV_BUILTIN_MAX)
udev_builtin_run(event->dev, builtin_cmd, command, false);
- } else {
- char program[UTIL_PATH_SIZE];
- char **envp;
-
+ else {
if (event->exec_delay > 0) {
- log_debug("delay execution of '%s'", program);
+ log_debug("delay execution of '%s'", command);
sleep(event->exec_delay);
}
- udev_event_apply_format(event, cmd, program, sizeof(program));
- envp = udev_device_get_properties_envp(event->dev);
- udev_event_spawn(event, timeout_usec, timeout_warn_usec, false, program, envp, NULL, 0);
+ udev_event_spawn(event, timeout_usec, timeout_warn_usec, false, command, NULL, 0);
}
}
}
diff --git a/src/udev/udev-rules.c b/src/udev/udev-rules.c
index 8ebc061eb1..c3e2e211e3 100644
--- a/src/udev/udev-rules.c
+++ b/src/udev/udev-rules.c
@@ -634,14 +634,11 @@ static int import_program_into_properties(struct udev_event *event,
usec_t timeout_usec,
usec_t timeout_warn_usec,
const char *program) {
- struct udev_device *dev = event->dev;
- char **envp;
char result[UTIL_LINE_SIZE];
char *line;
int err;
- envp = udev_device_get_properties_envp(dev);
- err = udev_event_spawn(event, timeout_usec, timeout_warn_usec, true, program, envp, result, sizeof(result));
+ err = udev_event_spawn(event, timeout_usec, timeout_warn_usec, true, program, result, sizeof(result));
if (err < 0)
return err;
@@ -654,7 +651,7 @@ static int import_program_into_properties(struct udev_event *event,
pos[0] = '\0';
pos = &pos[1];
}
- import_property_from_string(dev, line);
+ import_property_from_string(event->dev, line);
line = pos;
}
return 0;
@@ -2119,19 +2116,17 @@ int udev_rules_apply_to_event(struct udev_rules *rules,
}
case TK_M_PROGRAM: {
char program[UTIL_PATH_SIZE];
- char **envp;
char result[UTIL_LINE_SIZE];
free(event->program_result);
event->program_result = NULL;
udev_event_apply_format(event, rules_str(rules, cur->key.value_off), program, sizeof(program));
- envp = udev_device_get_properties_envp(event->dev);
log_debug("PROGRAM '%s' %s:%u",
program,
rules_str(rules, rule->rule.filename_off),
rule->rule.filename_line);
- if (udev_event_spawn(event, timeout_usec, timeout_warn_usec, true, program, envp, result, sizeof(result)) < 0) {
+ if (udev_event_spawn(event, timeout_usec, timeout_warn_usec, true, program, result, sizeof(result)) < 0) {
if (cur->key.op != OP_NOMATCH)
goto nomatch;
} else {
diff --git a/src/udev/udev.h b/src/udev/udev.h
index 3dca72e499..d17fc8c1ea 100644
--- a/src/udev/udev.h
+++ b/src/udev/udev.h
@@ -85,8 +85,7 @@ int udev_event_spawn(struct udev_event *event,
usec_t timeout_usec,
usec_t timeout_warn_usec,
bool accept_failure,
- const char *cmd, char **envp,
- char *result, size_t ressize);
+ const char *cmd, char *result, size_t ressize);
void udev_event_execute_rules(struct udev_event *event,
usec_t timeout_usec, usec_t timeout_warn_usec,
struct udev_list *properties_list,