1 files changed, 130 insertions, 0 deletions
diff --git a/src/collectors/apps.plugin/apps_proc_pid_cmdline.c b/src/collectors/apps.plugin/apps_proc_pid_cmdline.c
new file mode 100644
index 000000000..75a60fa3a
--- /dev/null
+++ b/src/collectors/apps.plugin/apps_proc_pid_cmdline.c
@@ -0,0 +1,130 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "apps_plugin.h"
+
+#ifdef __APPLE__
+bool get_cmdline_per_os(struct pid_stat *p, char *cmdline, size_t maxBytes) {
+    int mib[3] = {CTL_KERN, KERN_PROCARGS2, p->pid};
+    static char *args = NULL;
+    static size_t size = 0;
+
+    size_t new_size;
+    if (sysctl(mib, 3, NULL, &new_size, NULL, 0) == -1) {
+        return false;
+    }
+
+    if (new_size > size) {
+        if (args)
+            freez(args);
+
+        args = (char *)mallocz(new_size);
+        size = new_size;
+    }
+
+    memset(cmdline, 0, new_size < maxBytes ? new_size : maxBytes);
+
+    size_t used_size = size;
+    if (sysctl(mib, 3, args, &used_size, NULL, 0) == -1)
+        return false;
+
+    int argc;
+    memcpy(&argc, args, sizeof(argc));
+    char *ptr = args + sizeof(argc);
+    used_size -= sizeof(argc);
+
+    // Skip the executable path
+    while (*ptr && used_size > 0) {
+        ptr++;
+        used_size--;
+    }
+
+    // Copy only the arguments to the cmdline buffer, skipping the environment variables
+    size_t i = 0, copied_args = 0;
+    bool inArg = false;
+    for (; used_size > 0 && i < maxBytes - 1 && copied_args < argc; --used_size, ++ptr) {
+        if (*ptr == '\0') {
+            if (inArg) {
+                cmdline[i++] = ' ';  // Replace nulls between arguments with spaces
+                inArg = false;
+                copied_args++;
+            }
+        } else {
+            cmdline[i++] = *ptr;
+            inArg = true;
+        }
+    }
+
+    if (i > 0 && cmdline[i - 1] == ' ')
+        i--;  // Remove the trailing space if present
+
+    cmdline[i] = '\0'; // Null-terminate the string
+
+    return true;
+}
+#endif // __APPLE__
+
+#if defined(__FreeBSD__)
+static inline bool get_cmdline_per_os(struct pid_stat *p, char *cmdline, size_t bytes) {
+    size_t i, b = bytes - 1;
+    int mib[4];
+
+    mib[0] = CTL_KERN;
+    mib[1] = KERN_PROC;
+    mib[2] = KERN_PROC_ARGS;
+    mib[3] = p->pid;
+    if (unlikely(sysctl(mib, 4, cmdline, &b, NULL, 0)))
+        return false;
+
+    cmdline[b] = '\0';
+    for(i = 0; i < b ; i++)
+        if(unlikely(!cmdline[i])) cmdline[i] = ' ';
+
+    return true;
+}
+#endif // __FreeBSD__
+
+#if !defined(__FreeBSD__) && !defined(__APPLE__)
+static inline bool get_cmdline_per_os(struct pid_stat *p, char *cmdline, size_t bytes) {
+    if(unlikely(!p->cmdline_filename)) {
+        char filename[FILENAME_MAX];
+        snprintfz(filename, FILENAME_MAX, "%s/proc/%d/cmdline", netdata_configured_host_prefix, p->pid);
+        p->cmdline_filename = strdupz(filename);
+    }
+
+    int fd = open(p->cmdline_filename, procfile_open_flags, 0666);
+    if(unlikely(fd == -1))
+        return false;
+
+    ssize_t i, b = read(fd, cmdline, bytes - 1);
+    close(fd);
+
+    if(unlikely(b < 0))
+        return false;
+
+    cmdline[b] = '\0';
+    for(i = 0; i < b ; i++)
+        if(unlikely(!cmdline[i])) cmdline[i] = ' ';
+
+    return true;
+}
+#endif // !__FreeBSD__ !__APPLE__
+
+int read_proc_pid_cmdline(struct pid_stat *p) {
+    static char cmdline[MAX_CMDLINE];
+
+    if(unlikely(!get_cmdline_per_os(p, cmdline, sizeof(cmdline))))
+        goto cleanup;
+
+    if(p->cmdline) freez(p->cmdline);
+    p->cmdline = strdupz(cmdline);
+
+    debug_log("Read file '%s' contents: %s", p->cmdline_filename, p->cmdline);
+
+    return 1;
+
+cleanup:
+    // copy the command to the command line
+    if(p->cmdline) freez(p->cmdline);
+    p->cmdline = strdupz(p->comm);
+    return 0;
+}