mount.cifs: make return codes match the return codes for /bin/mount (try #3)

The manpage for /bin/mount specifies that the return code should be a
positive integer (actually, it's a bitfield). Clean up the return
codes from mount.cifs to make them match the expected return values
from /bin/mount. This necessary for proper integration with autofs.

This is the third attempt at this patch. The changes here are minor,
just changing some return's from main() into exit() calls for
consistency's sake.

Signed-off-by: Jeff Layton <jlayton@redhat.com>

1 files changed, 46 insertions, 36 deletions

diff --git a/source3/client/mount.cifs.c b/source3/client/mount.cifs.c
index 0c30216cd4..fd8014cf9f 100644
--- a/source3/client/mount.cifs.c
+++ b/source3/client/mount.cifs.c
@@ -79,6 +79,15 @@
 #define MOUNT_PASSWD_SIZE 64
 #define DOMAIN_SIZE 64
 
+/* exit status - bits below are ORed */
+#define EX_USAGE        1       /* incorrect invocation or permission */
+#define EX_SYSERR       2       /* out of memory, cannot fork, ... */
+#define EX_SOFTWARE     4       /* internal mount bug or wrong version */
+#define EX_USER         8       /* user interrupt */
+#define EX_FILEIO      16       /* problems writing, locking, ... mtab/fstab */
+#define EX_FAIL        32       /* mount failure */
+#define EX_SOMEOK      64       /* some mount succeeded */
+
 const char *thisprogram;
 int verboseflag = 0;
 static int got_password = 0;
@@ -174,7 +183,7 @@ static void mount_cifs_usage(void)
 	printf("\n\t%s -V\n",thisprogram);
 
 	SAFE_FREE(mountpassword);
-	exit(1);
+	exit(EX_USAGE);
 }
 
 /* caller frees username if necessary */
@@ -233,7 +242,7 @@ static int open_cred_file(char * file_name)
 				if(length > 4086) {
 					printf("mount.cifs failed due to malformed username in credentials file");
 					memset(line_buf,0,4096);
-					exit(1);
+					exit(EX_USAGE);
 				} else {
 					got_user = 1;
 					user_name = (char *)calloc(1 + length,1);
@@ -257,7 +266,7 @@ static int open_cred_file(char * file_name)
 				if(length > MOUNT_PASSWD_SIZE) {
 					printf("mount.cifs failed: password in credentials file too long\n");
 					memset(line_buf,0, 4096);
-					exit(1);
+					exit(EX_USAGE);
 				} else {
 					if(mountpassword == NULL) {
 						mountpassword = (char *)calloc(MOUNT_PASSWD_SIZE+1,1);
@@ -285,7 +294,7 @@ static int open_cred_file(char * file_name)
                                 }
                                 if(length > DOMAIN_SIZE) {
                                         printf("mount.cifs failed: domain in credentials file too long\n");
-                                        exit(1);
+                                        exit(EX_USAGE);
                                 } else {
                                         if(domain_name == NULL) {
                                                 domain_name = (char *)calloc(DOMAIN_SIZE+1,1);
@@ -318,7 +327,7 @@ static int get_password_from_file(int file_descript, char * filename)
 
 	if (mountpassword == NULL) {
 		printf("malloc failed\n");
-		exit(1);
+		exit(EX_SYSERR);
 	}
 
 	if(filename != NULL) {
@@ -326,7 +335,7 @@ static int get_password_from_file(int file_descript, char * filename)
 		if(file_descript < 0) {
 			printf("mount.cifs failed. %s attempting to open password file %s\n",
 				   strerror(errno),filename);
-			exit(1);
+			exit(EX_SYSERR);
 		}
 	}
 	/* else file already open and fd provided */
@@ -337,7 +346,7 @@ static int get_password_from_file(int file_descript, char * filename)
 			printf("mount.cifs failed. Error %s reading password file\n",strerror(errno));
 			if(filename != NULL)
 				close(file_descript);
-			exit(1);
+			exit(EX_SYSERR);
 		} else if(rc == 0) {
 			if(mountpassword[0] == 0) {
 				if(verboseflag)
@@ -563,7 +572,7 @@ static int parse_options(char ** optionsp, int * filesys_flags)
 
 					if (!(pw = getpwnam(value))) {
 						printf("bad user name \"%s\"\n", value);
-						exit(1);
+						exit(EX_USAGE);
 					}
 					snprintf(user, sizeof(user), "%u", pw->pw_uid);
 				} else {
@@ -579,7 +588,7 @@ static int parse_options(char ** optionsp, int * filesys_flags)
 
 					if (!(gr = getgrnam(value))) {
 						printf("bad group name \"%s\"\n", value);
-						exit(1);
+						exit(EX_USAGE);
 					}
 					snprintf(group, sizeof(group), "%u", gr->gr_gid);
 				} else {
@@ -674,7 +683,7 @@ static int parse_options(char ** optionsp, int * filesys_flags)
 		out = (char *)realloc(out, out_len + word_len + 2);
 		if (out == NULL) {
 			perror("malloc");
-			exit(1);
+			exit(EX_SYSERR);
 		}
 
 		if (out_len) {
@@ -699,7 +708,7 @@ nocopy:
 		out = (char *)realloc(out, out_len + word_len + 6);
 		if (out == NULL) {
 			perror("malloc");
-			exit(1);
+			exit(EX_SYSERR);
 		}
 
 		if (out_len) {
@@ -715,7 +724,7 @@ nocopy:
 		out = (char *)realloc(out, out_len + 1 + word_len + 6);
 		if (out == NULL) {
 		perror("malloc");
-			exit(1);
+			exit(EX_SYSERR);
 		}
 
 		if (out_len) {
@@ -1050,7 +1059,7 @@ int main(int argc, char ** argv)
 		thisprogram = argv[0];
 	} else {
 		mount_cifs_usage();
-		exit(1);
+		exit(EX_USAGE);
 	}
 
 	if(thisprogram == NULL)
@@ -1067,12 +1076,12 @@ int main(int argc, char ** argv)
 		share_name = strndup(argv[1], MAX_UNC_LEN);
 		if (share_name == NULL) {
 			fprintf(stderr, "%s: %s", argv[0], strerror(ENOMEM));
-			exit(1);
+			exit(EX_SYSERR);
 		}
 		mountpoint = argv[2];
 	} else {
 		mount_cifs_usage();
-		exit(1);
+		exit(EX_USAGE);
 	}
 
 	/* add sharename in opts string as unc= parm */
@@ -1094,7 +1103,7 @@ int main(int argc, char ** argv)
 		case '?':
 		case 'h':	 /* help */
 			mount_cifs_usage ();
-			exit(1);
+			exit(EX_USAGE);
 		case 'n':
 		    ++nomtab;
 		    break;
@@ -1148,14 +1157,14 @@ int main(int argc, char ** argv)
 				uid = strtoul(optarg, &ep, 10);
 				if (*ep) {
 					printf("bad uid value \"%s\"\n", optarg);
-					exit(1);
+					exit(EX_USAGE);
 				}
 			} else {
 				struct passwd *pw;
 
 				if (!(pw = getpwnam(optarg))) {
 					printf("bad user name \"%s\"\n", optarg);
-					exit(1);
+					exit(EX_USAGE);
 				}
 				uid = pw->pw_uid;
 				endpwent();
@@ -1168,14 +1177,14 @@ int main(int argc, char ** argv)
 				gid = strtoul(optarg, &ep, 10);
 				if (*ep) {
 					printf("bad gid value \"%s\"\n", optarg);
-					exit(1);
+					exit(EX_USAGE);
 				}
 			} else {
 				struct group *gr;
 
 				if (!(gr = getgrnam(optarg))) {
 					printf("bad user name \"%s\"\n", optarg);
-					exit(1);
+					exit(EX_USAGE);
 				}
 				gid = gr->gr_gid;
 				endpwent();
@@ -1205,13 +1214,13 @@ int main(int argc, char ** argv)
 		default:
 			printf("unknown mount option %c\n",c);
 			mount_cifs_usage();
-			exit(1);
+			exit(EX_USAGE);
 		}
 	}
 
 	if((argc < 3) || (dev_name == NULL) || (mountpoint == NULL)) {
 		mount_cifs_usage();
-		exit(1);
+		exit(EX_USAGE);
 	}
 
 	if (getenv("PASSWD")) {
@@ -1228,13 +1237,13 @@ int main(int argc, char ** argv)
 	}
 
         if (orgoptions && parse_options(&orgoptions, &flags)) {
-                rc = -1;
+                rc = EX_USAGE;
 		goto mount_exit;
 	}
 	ipaddr = parse_server(&share_name);
 	if((ipaddr == NULL) && (got_ip == 0)) {
 		printf("No ip address specified and hostname not found\n");
-		rc = -1;
+		rc = EX_USAGE;
 		goto mount_exit;
 	}
 	
@@ -1249,19 +1258,19 @@ int main(int argc, char ** argv)
 	}
 	if(chdir(mountpoint)) {
 		printf("mount error: can not change directory into mount target %s\n",mountpoint);
-		rc = -1;
+		rc = EX_USAGE;
 		goto mount_exit;
 	}
 
 	if(stat (".", &statbuf)) {
 		printf("mount error: mount point %s does not exist\n",mountpoint);
-		rc = -1;
+		rc = EX_USAGE;
 		goto mount_exit;
 	}
 
 	if (S_ISDIR(statbuf.st_mode) == 0) {
 		printf("mount error: mount point %s is not a directory\n",mountpoint);
-		rc = -1;
+		rc = EX_USAGE;
 		goto mount_exit;
 	}
 
@@ -1274,7 +1283,7 @@ int main(int argc, char ** argv)
 #endif						
 		} else {
 			printf("mount error: permission denied or not superuser and mount.cifs not installed SUID\n"); 
-			return -1;
+			exit(EX_USAGE);
 		}
 	}
 
@@ -1289,7 +1298,7 @@ int main(int argc, char ** argv)
 		mountpassword = (char *)calloc(MOUNT_PASSWD_SIZE+1,1);
 		if (!tmp_pass || !mountpassword) {
 			printf("Password not entered, exiting\n");
-			return -1;
+			exit(EX_USAGE);
 		}
 		strlcpy(mountpassword, tmp_pass, MOUNT_PASSWD_SIZE+1);
 		got_password = 1;
@@ -1307,7 +1316,7 @@ mount_retry:
 	else {
 		printf("No server share name specified\n");
 		printf("\nMounting the DFS root for server not implemented yet\n");
-                exit(1);
+                exit(EX_USAGE);
 	}
 	if(user_name)
 		optlen += strlen(user_name) + 6;
@@ -1321,7 +1330,7 @@ mount_retry:
 
 	if(options == NULL) {
 		printf("Could not allocate memory for mount options\n");
-		return -1;
+		exit(EX_SYSERR);
 	}
 
 	options[0] = 0;
@@ -1400,8 +1409,7 @@ mount_retry:
 			printf("mount error %d = %s\n",errno,strerror(errno));
 		}
 		printf("Refer to the mount.cifs(8) manual page (e.g.man mount.cifs)\n");
-		rc = -1;
-		goto mount_exit;
+		rc = EX_FAIL;
 	} else {
 		pmntfile = setmntent(MOUNTED, "a+");
 		if(pmntfile) {
@@ -1439,11 +1447,13 @@ mount_retry:
 			rc = addmntent(pmntfile,&mountent);
 			endmntent(pmntfile);
 			SAFE_FREE(mountent.mnt_opts);
+			if (rc)
+				rc = EX_FILEIO;
 		} else {
-		    printf("could not update mount table\n");
+			printf("could not update mount table\n");
+			rc = EX_FILEIO;
 		}
 	}
-	rc = 0;
 mount_exit:
 	if(mountpassword) {
 		int len = strlen(mountpassword);
@@ -1455,5 +1465,5 @@ mount_exit:
 	SAFE_FREE(orgoptions);
 	SAFE_FREE(resolved_path);
 	SAFE_FREE(share_name);
-	return rc;
+	exit(rc);
 }