#endif
#include "alloc-util.h"
-#include "architecture.h"
+//#include "architecture.h"
#include "escape.h"
#include "fd-util.h"
#include "fileio.h"
int get_process_cmdline(pid_t pid, size_t max_length, bool comm_fallback, char **line) {
_cleanup_fclose_ FILE *f = NULL;
+ bool space = false;
char *r = NULL, *k;
const char *p;
int c;
assert(line);
assert(pid >= 0);
+ /* Retrieves a process' command line. Replaces unprintable characters while doing so by whitespace (coalescing
+ * multiple sequential ones into one). If max_length is != 0 will return a string of the specified size at most
+ * (the trailing NUL byte does count towards the length here!), abbreviated with a "..." ellipsis. If
+ * comm_fallback is true and the process has no command line set (the case for kernel threads), or has a
+ * command line that resolves to the empty string will return the "comm" name of the process instead.
+ *
+ * Returns -ESRCH if the process doesn't exist, and -ENOENT if the process has no command line (and
+ * comm_fallback is false). */
+
p = procfs_file_alloca(pid, "cmdline");
f = fopen(p, "re");
return -errno;
}
- if (max_length == 0) {
+ if (max_length == 1) {
+
+ /* If there's only room for one byte, return the empty string */
+ r = new0(char, 1);
+ if (!r)
+ return -ENOMEM;
+
+ *line = r;
+ return 0;
+
+ } else if (max_length == 0) {
size_t len = 0, allocated = 0;
while ((c = getc(f)) != EOF) {
- if (!GREEDY_REALLOC(r, allocated, len+2)) {
+ if (!GREEDY_REALLOC(r, allocated, len+3)) {
free(r);
return -ENOMEM;
}
- r[len++] = isprint(c) ? c : ' ';
- }
+ if (isprint(c)) {
+ if (space) {
+ r[len++] = ' ';
+ space = false;
+ }
+
+ r[len++] = c;
+ } else if (len > 0)
+ space = true;
+ }
if (len > 0)
- r[len-1] = 0;
+ r[len] = 0;
+ else
+ r = mfree(r);
} else {
- bool space = false;
+ bool dotdotdot = false;
size_t left;
r = new(char, max_length);
while ((c = getc(f)) != EOF) {
if (isprint(c)) {
+
if (space) {
- if (left <= 4)
+ if (left <= 2) {
+ dotdotdot = true;
break;
+ }
*(k++) = ' ';
left--;
space = false;
}
- if (left <= 4)
+ if (left <= 1) {
+ dotdotdot = true;
break;
+ }
*(k++) = (char) c;
left--;
- } else
+ } else if (k > r)
space = true;
}
- if (left <= 4) {
- size_t n = MIN(left-1, 3U);
- memcpy(k, "...", n);
- k[n] = 0;
+ if (dotdotdot) {
+ if (max_length <= 4) {
+ k = r;
+ left = max_length;
+ } else {
+ k = r + max_length - 4;
+ left = 4;
+
+ /* Eat up final spaces */
+ while (k > r && isspace(k[-1])) {
+ k--;
+ left++;
+ }
+ }
+
+ strncpy(k, "...", left-1);
+ k[left-1] = 0;
} else
*k = 0;
}
if (h < 0)
return h;
- r = strjoin("[", t, "]", NULL);
+ if (max_length == 0)
+ r = strjoin("[", t, "]", NULL);
+ else {
+ size_t l;
+
+ l = strlen(t);
+
+ if (l + 3 <= max_length)
+ r = strjoin("[", t, "]", NULL);
+ else if (max_length <= 6) {
+
+ r = new(char, max_length);
+ if (!r)
+ return -ENOMEM;
+
+ memcpy(r, "[...]", max_length-1);
+ r[max_length-1] = 0;
+ } else {
+ char *e;
+
+ t[max_length - 6] = 0;
+
+ /* Chop off final spaces */
+ e = strchr(t, 0);
+ while (e > t && isspace(e[-1]))
+ e--;
+ *e = 0;
+
+ r = strjoin("[", t, "...]", NULL);
+ }
+ }
if (!r)
return -ENOMEM;
}
* "systemd"). If you pass a longer string it will be
* truncated */
- prctl(PR_SET_NAME, name);
+ (void) prctl(PR_SET_NAME, name);
if (program_invocation_name)
strncpy(program_invocation_name, name, strlen(program_invocation_name));
assert(field);
assert(uid);
- if (pid == 0)
- return getuid();
-
p = procfs_file_alloca(pid, "status");
f = fopen(p, "re");
if (!f) {
if (!outcome)
return -ENOMEM;
} else
- outcome[sz] = '\0';
+ outcome[sz] = '\0';
*env = outcome;
outcome = NULL;
if (errno == EINTR)
continue;
- return -errno;
+ return negative_errno();
}
return 0;
return -EPROTO;
}
-void sigkill_wait(pid_t *pid) {
+#if 0 /// UNNEEDED by elogind
+void sigkill_wait(pid_t pid) {
+ assert(pid > 1);
+
+ if (kill(pid, SIGKILL) > 0)
+ (void) wait_for_terminate(pid, NULL);
+}
+
+void sigkill_waitp(pid_t *pid) {
if (!pid)
return;
if (*pid <= 1)
return;
- if (kill(*pid, SIGKILL) > 0)
- (void) wait_for_terminate(*pid, NULL);
+ sigkill_wait(*pid);
}
-#if 0 /// UNNEEDED by elogind
int kill_and_sigcont(pid_t pid, int sig) {
int r;
r = kill(pid, sig) < 0 ? -errno : 0;
- if (r >= 0)
- kill(pid, SIGCONT);
+ /* If this worked, also send SIGCONT, unless we already just sent a SIGCONT, or SIGKILL was sent which isn't
+ * affected by a process being suspended anyway. */
+ if (r >= 0 && !IN_SET(SIGCONT, SIGKILL))
+ (void) kill(pid, SIGCONT);
return r;
}
#if 0 /// UNNEEDED by elogind
noreturn void freeze(void) {
+ log_close();
+
/* Make sure nobody waits for us on a socket anymore */
close_all_fds(NULL, 0);
#endif
}
+int pid_compare_func(const void *a, const void *b) {
+ const pid_t *p = a, *q = b;
+
+ /* Suitable for usage in qsort() */
+
+ if (*p < *q)
+ return -1;
+ if (*p > *q)
+ return 1;
+ return 0;
+}
+
static const char *const ioprio_class_table[] = {
[IOPRIO_CLASS_NONE] = "none",
[IOPRIO_CLASS_RT] = "realtime",
~ianmdlvl / elogind.git / blobdiff