xnu-6153.81.5.tar.gz

[apple/xnu.git] / SETUP / replacecontents / replacecontents.c

diff --git a/SETUP/replacecontents/replacecontents.c b/SETUP/replacecontents/replacecontents.c
index 3e72b2d9d32342ab6ea6340ca33caa158a52248c..5b14bc3dab7972e667a4a55c70bfe8508d9cae9a 100644 (file)
--- a/SETUP/replacecontents/replacecontents.c
+++ b/SETUP/replacecontents/replacecontents.c
@@ -37,7 +37,8 @@
 
 void usage(void);
 
-int main(int argc, char * argv[])
+int
+main(int argc, char * argv[])
 {
        struct stat sb;
        char *newcontent = NULL;
@@ -55,18 +56,19 @@ int main(int argc, char * argv[])
 
        dst = argv[1];
 
-       for (i=2; i < argc; i++) {
+       for (i = 2; i < argc; i++) {
                newcontentlength += strlen(argv[i]) + 1 /* space or newline */;
        }
        newcontentlength += 1; /* NUL */
 
        newcontent = malloc(newcontentlength);
-       if (newcontent == NULL)
+       if (newcontent == NULL) {
                err(EX_UNAVAILABLE, "malloc() failed");
+       }
 
        newcontent[0] = '\0';
 
-       for (i=2; i < argc; i++) {
+       for (i = 2; i < argc; i++) {
                strlcat(newcontent, argv[i], newcontentlength);
                if (i < argc - 1) {
                        strlcat(newcontent, " ", newcontentlength);
@@ -76,15 +78,18 @@ int main(int argc, char * argv[])
        }
 
        dstfd = open(dst, O_RDWR | O_CREAT | O_APPEND, DEFFILEMODE);
-       if (dstfd < 0)
+       if (dstfd < 0) {
                err(EX_NOINPUT, "open(%s)", dst);
+       }
 
        ret = fstat(dstfd, &sb);
-       if (ret < 0)
+       if (ret < 0) {
                err(EX_NOINPUT, "fstat(%s)", dst);
+       }
 
-       if (!S_ISREG(sb.st_mode))
+       if (!S_ISREG(sb.st_mode)) {
                err(EX_USAGE, "%s is not a regular file", dst);
+       }
 
        if (sb.st_size != newcontentlength) {
                /* obvious new content must be different than old */
@@ -92,46 +97,53 @@ int main(int argc, char * argv[])
        }
 
        oldcontent = malloc(newcontentlength);
-       if (oldcontent == NULL)
+       if (oldcontent == NULL) {
                err(EX_UNAVAILABLE, "malloc(%lu) failed", newcontentlength);
+       }
 
        readsize = read(dstfd, oldcontent, newcontentlength);
-       if (readsize == -1)
+       if (readsize == -1) {
                err(EX_UNAVAILABLE, "read() failed");
-       else if (readsize != newcontentlength)
+       } else if (readsize != newcontentlength) {
                errx(EX_UNAVAILABLE, "short read of file");
+       }
 
        if (0 == memcmp(oldcontent, newcontent, newcontentlength)) {
                /* binary comparison succeeded, just exit */
                free(oldcontent);
                ret = close(dstfd);
-               if (ret < 0)
+               if (ret < 0) {
                        err(EX_UNAVAILABLE, "close() failed");
+               }
 
                exit(0);
        }
 
 replace:
        ret = ftruncate(dstfd, 0);
-       if (ret < 0)
+       if (ret < 0) {
                err(EX_UNAVAILABLE, "ftruncate() failed");
+       }
 
        writesize = write(dstfd, newcontent, newcontentlength);
-       if (writesize == -1)
+       if (writesize == -1) {
                err(EX_UNAVAILABLE, "write() failed");
-       else if (writesize != newcontentlength)
+       } else if (writesize != newcontentlength) {
                errx(EX_UNAVAILABLE, "short write of file");
+       }
 
        ret = close(dstfd);
-       if (ret < 0)
+       if (ret < 0) {
                err(EX_NOINPUT, "close(dst)");
+       }
 
        return 0;
 }
 
-void usage(void)
+void
+usage(void)
 {
        fprintf(stderr, "Usage: %s <dst> <new> <contents> <...>\n",
-                       getprogname());
+           getprogname());
        exit(EX_USAGE);
 }