File procps-ng-3.3.8-readeof.patch of Package procps

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File procps-ng-3.3.8-readeof.patch of Package procps (Revision 424a34260ade1f22c42fbf8958b68a70)

Currently displaying revision 424a34260ade1f22c42fbf8958b68a70 , Show latest

--- proc/readproc.c
+++ proc/readproc.c	2013-05-29 10:55:48.129939330 +0000
@@ -544,7 +544,7 @@ static int file2str(const char *director
     if (ub->buf) ub->buf[0] = '\0';
     else ub->buf = xcalloc((ub->siz = buffGRW));
     sprintf(path, "%s/%s", directory, what);
-    if (-1 == (fd = open(path, O_RDONLY, 0))) return -1;
+    if (-1 == (fd = open(path, O_RDONLY, O_NOATIME))) return -1;
     while (0 < (num = read(fd, ub->buf + tot_read, ub->siz - tot_read))) {
         tot_read += num;
         if (tot_read < ub->siz) break;
@@ -559,41 +559,42 @@ static int file2str(const char *director
 
 static char** file2strvec(const char* directory, const char* what) {
     char buf[2048];	/* read buf bytes at a time */
-    char *p, *rbuf = 0, *endbuf, **q, **ret;
-    int fd, tot = 0, n, c, end_of_file = 0;
-    int align;
+    char *p, *rbuf = (char*)0, *endbuf, **q, **ret;
+    int fd, c;
+    ssize_t n, align, tot = 0;
 
     sprintf(buf, "%s/%s", directory, what);
-    fd = open(buf, O_RDONLY, 0);
+    fd = open(buf, O_RDONLY, O_NOATIME);
     if(fd==-1) return NULL;
 
     /* read whole file into a memory buffer, allocating as we go */
-    while ((n = read(fd, buf, sizeof buf - 1)) >= 0) {
-	if (n < (int)(sizeof buf - 1))
-	    end_of_file = 1;
-	if (n == 0 && rbuf == 0) {
-	    close(fd);
-	    return NULL;	/* process died between our open and read */
-	}
+    do {
+	n = read(fd, buf, sizeof(buf) - 1);
 	if (n < 0) {
-	    if (rbuf)
-		free(rbuf);
-	    close(fd);
-	    return NULL;	/* read error */
+	    tot = 0;
+	    break;				/* read error! */
+	}
+	if (n == 0) {
+	    if(rbuf == (char*)0)
+		tot = 0;			/* process died between our open and read */
+	    break;				/* we're done */
 	}
-	if (end_of_file && (n == 0 || buf[n-1]))/* last read char not null */
-	    buf[n++] = '\0';			/* so append null-terminator */
 	rbuf = xrealloc(rbuf, tot + n);		/* allocate more memory */
 	memcpy(rbuf + tot, buf, n);		/* copy buffer into it */
 	tot += n;				/* increment total byte ctr */
-	if (end_of_file)
-	    break;
-    }
+    } while (n >= (sizeof(buf) - 1));
+
     close(fd);
-    if (n <= 0 && !end_of_file) {
+
+    if (tot == 0) {
 	if (rbuf) free(rbuf);
-	return NULL;		/* read error */
+	return NULL;				/* read error */
+    }
+    if (rbuf[tot-1]) {				/* last read char not null */
+	rbuf = xrealloc(rbuf, tot + 1);		/* allocate more memory */
+	rbuf[tot++] = '\0';			/* and append null-terminator */
     }
+
     endbuf = rbuf + tot;			/* count space for pointers */
     align = (sizeof(char*)-1) - ((tot + sizeof(char*)-1) & (sizeof(char*)-1));
     for (c = 0, p = rbuf; p < endbuf; p++) {
@@ -626,7 +627,7 @@ static int read_unvectored(char *restric
     unsigned n = 0;
 
     snprintf(path, sizeof(path), "%s/%s", whom, what);
-    fd = open(path, O_RDONLY);
+    fd = open(path, O_RDONLY, O_NOATIME);
     if(fd==-1) return 0;
 
     for(;;){

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File procps-ng-3.3.8-readeof.patch of Package procps (Revision 424a34260ade1f22c42fbf8958b68a70)

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