split udev_util in several files

It too big for the small tools to link against for only the log function.

Signed-off-by: Kay Sievers <kay.sievers@suse.de>

1 files changed, 179 insertions, 0 deletions

diff --git a/udev_utils_run.c b/udev_utils_run.c
new file mode 100644
index 0000000000..c2e77cbbcc
--- /dev/null
+++ b/udev_utils_run.c
@@ -0,0 +1,179 @@
+/*
+ * udev_utils_run.c - execute programs from udev and read its output
+ *
+ * Copyright (C) 2004-2005 Kay Sievers <kay.sievers@vrfy.org>
+ *
+ *	This program is free software; you can redistribute it and/or modify it
+ *	under the terms of the GNU General Public License as published by the
+ *	Free Software Foundation version 2 of the License.
+ * 
+ *	This program is distributed in the hope that it will be useful, but
+ *	WITHOUT ANY WARRANTY; without even the implied warranty of
+ *	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *	General Public License for more details.
+ * 
+ *	You should have received a copy of the GNU General Public License along
+ *	with this program; if not, write to the Free Software Foundation, Inc.,
+ *	675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <stddef.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <ctype.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <sys/wait.h>
+
+#include "udev_libc_wrapper.h"
+#include "udev.h"
+#include "logging.h"
+#include "udev_utils.h"
+#include "list.h"
+
+
+int pass_env_to_socket(const char *sockname, const char *devpath, const char *action)
+{
+	int sock;
+	struct sockaddr_un saddr;
+	socklen_t addrlen;
+	char buf[2048];
+	size_t bufpos = 0;
+	int i;
+	int retval;
+
+	dbg("pass environment to socket '%s'", sockname);
+	sock = socket(AF_LOCAL, SOCK_DGRAM, 0);
+	memset(&saddr, 0x00, sizeof(struct sockaddr_un));
+	saddr.sun_family = AF_LOCAL;
+	/* only abstract namespace is supported */
+	strcpy(&saddr.sun_path[1], sockname);
+	addrlen = offsetof(struct sockaddr_un, sun_path) + strlen(saddr.sun_path+1) + 1;
+
+	bufpos = snprintf(buf, sizeof(buf)-1, "%s@%s", action, devpath);
+	bufpos++;
+	for (i = 0; environ[i] != NULL && bufpos < sizeof(buf); i++) {
+		bufpos += strlcpy(&buf[bufpos], environ[i], sizeof(buf) - bufpos-1);
+		bufpos++;
+	}
+
+	retval = sendto(sock, &buf, bufpos, 0, (struct sockaddr *)&saddr, addrlen);
+	if (retval != -1)
+		retval = 0;
+
+	close(sock);
+	return retval;
+}
+
+int execute_program(const char *command, const char *subsystem,
+		    char *result, size_t ressize, size_t *reslen)
+{
+	int retval = 0;
+	int count;
+	int status;
+	int pipefds[2];
+	pid_t pid;
+	char *pos;
+	char arg[PATH_SIZE];
+	char *argv[(sizeof(arg) / 2) + 1];
+	int devnull;
+	int i;
+	size_t len;
+
+	strlcpy(arg, command, sizeof(arg));
+	i = 0;
+	if (strchr(arg, ' ')) {
+		pos = arg;
+		while (pos != NULL) {
+			if (pos[0] == '\'') {
+				/* don't separate if in apostrophes */
+				pos++;
+				argv[i] = strsep(&pos, "\'");
+				while (pos && pos[0] == ' ')
+					pos++;
+			} else {
+				argv[i] = strsep(&pos, " ");
+			}
+			dbg("arg[%i] '%s'", i, argv[i]);
+			i++;
+		}
+		argv[i] =  NULL;
+		dbg("execute '%s' with parsed arguments", arg);
+	} else {
+		argv[0] = arg;
+		argv[1] = (char *) subsystem;
+		argv[2] = NULL;
+		dbg("execute '%s' with subsystem '%s' argument", arg, argv[1]);
+	}
+
+	if (result) {
+		if (pipe(pipefds) != 0) {
+			err("pipe failed");
+			return -1;
+		}
+	}
+
+	pid = fork();
+	switch(pid) {
+	case 0:
+		/* child dup2 write side of pipe to STDOUT */
+		devnull = open("/dev/null", O_RDWR);
+		if (devnull >= 0) {
+			dup2(devnull, STDIN_FILENO);
+			if (!result)
+				dup2(devnull, STDOUT_FILENO);
+			dup2(devnull, STDERR_FILENO);
+			close(devnull);
+		}
+		if (result)
+			dup2(pipefds[1], STDOUT_FILENO);
+		execv(arg, argv);
+		err("exec of program failed");
+		_exit(1);
+	case -1:
+		err("fork of '%s' failed", arg);
+		return -1;
+	default:
+		/* parent reads from pipefds[0] */
+		if (result) {
+			close(pipefds[1]);
+			len = 0;
+			while (1) {
+				count = read(pipefds[0], result + len, ressize - len-1);
+				if (count < 0) {
+					err("read failed with '%s'", strerror(errno));
+					retval = -1;
+					break;
+				}
+
+				if (count == 0)
+					break;
+
+				len += count;
+				if (len >= ressize-1) {
+					err("ressize %ld too short", (long)ressize);
+					retval = -1;
+					break;
+				}
+			}
+			result[len] = '\0';
+			close(pipefds[0]);
+			if (reslen)
+				*reslen = len;
+		}
+		waitpid(pid, &status, 0);
+
+		if (!WIFEXITED(status) || (WEXITSTATUS(status) != 0)) {
+			dbg("exec program status 0x%x", status);
+			retval = -1;
+		}
+	}
+
+	return retval;
+}
+