Add Solaris implementation

solaris/Makefile

@@ -0,0 +1,9 @@
+CC = gcc
+BIN = restartable
+CFLAGS = -Wall -O2
+
+$(BIN): *.c
+	$(CC) -o $@ $(CFLAGS) *.c $(LDFLAGS)
+
+clean:
+	@rm -f $(BIN)

solaris/restartable.c

@@ -0,0 +1,107 @@
+#include <sys/types.h>
+#include <ctype.h>
+#include <err.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <limits.h>
+#include <paths.h>
+#include <pwd.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#define _KERNEL
+#include <sys/procfs.h>
+
+static int verbose;
+
+static void
+parse_psinfo(const char *pid, int procFd) {
+	struct passwd *pwd;
+	char *user = "-";
+	psinfo_t psinfo;
+	int fd;
+
+	if ((fd = openat(procFd, "psinfo", O_RDONLY)) == -1) {
+		warn("%s", pid);
+		return;
+	}
+
+	if (read(fd, &psinfo, sizeof(psinfo_t)) == sizeof(psinfo_t)) {
+		if ((pwd = getpwuid(psinfo.pr_uid)) != NULL)
+			user = pwd->pw_name;
+		printf("%d\t%d\t%d\t%s\t%s\n", psinfo.pr_pid, psinfo.pr_ppid, psinfo.pr_uid, user, psinfo.pr_fname);
+		if (verbose)
+			printf("\t%s\n", psinfo.pr_psargs);
+	}
+
+	(void) close(fd);
+}
+
+static void
+print_proc(const char *pid) {
+	char linkPath[PATH_MAX];
+	char link[PATH_MAX];
+	char procPid[256];
+	int procFd, mapFd;
+	prmap_t entry;
+
+	(void) snprintf(procPid, sizeof(procPid), "/proc/%s", pid);
+	if ((procFd = open(procPid, O_RDONLY | O_DIRECTORY)) == -1)
+		return;
+
+	if ((mapFd = openat(procFd, "map", O_RDONLY)) == -1) {
+		warn("%s", pid);
+		close(procFd);
+		return;
+	}
+
+	while (read(mapFd, &entry, sizeof(entry)) == sizeof(entry)) {
+		/* Skip anonymous mappings */
+		if (entry.pr_mflags & MA_ANON)
+			continue;
+		/* Skip non-executable mappings */
+		if (!(entry.pr_mflags & MA_EXEC)) 
+			continue;
+		/* Solaris doesn't have w^x, so skip writable to avoid duplicate entries */
+		if (entry.pr_mflags & MA_WRITE)
+			continue;
+
+		(void) snprintf(linkPath, sizeof(linkPath), "path/%s", entry.pr_mapname);
+		if (readlinkat(procFd, linkPath, link, sizeof(link)) == -1) {
+			parse_psinfo(pid, procFd);
+			break;
+		}
+	}
+
+	(void) close(mapFd);
+	(void) close(procFd);
+}
+
+static void
+print_all(void) {
+	DIR *dir;
+	struct dirent *entry;
+
+	dir = opendir("/proc");
+	if (dir == NULL)
+		err(1, "/proc");
+
+	while ((entry = readdir(dir)) != NULL)
+		if (isdigit(entry->d_name[0]))
+			print_proc(entry->d_name);
+
+	(void) closedir(dir);
+}
+
+int
+main(int argc, char *argv[]) {
+	if (argc > 2)
+		errx(1, "Usage: %s [-v]\n", argv[0]);
+	if (argc > 1 && !strcmp(argv[1], "-v"))
+		verbose = 1;
+
+	printf("PID\tPPID\tUID\tUser\tCommand\n");
+	print_all();
+
+	return 0;
+}