[Crash-utility] [patch 1/1] patch to handle path name properly in "mount" command

From: Lin Feng Shen <shenlinf(a)cn.ibm.com&gt; "mount [devname | dirname]" showes mount points according to the device name or directory name. Generally speaking, two path names shouldn't be different due to additional "/", e.g. /distros and /distros/, but it seems that mount command doesn't handle it properly, e.g. ---------- crash> mount VFSMOUNT SUPERBLK TYPE DEVNAME DIRNAME ... c00000000224eb80 c000000002589800 ext3 /dev/sda2 /boot ... crash> mount /boot VFSMOUNT SUPERBLK TYPE DEVNAME DIRNAME c00000000224eb80 c000000002589800 ext3 /dev/sda2 /boot crash> mount /boot/ crash> ---------- The patch provides pathcmp() replacing STREQ to compare two path names. It's created against crash-4.0-25.4 in SLES10_RC3. Signed-off-by: Lin Feng Shen <shenlinf(a)cn.ibm.com&gt; --- diff -upNr crash-4.0-2.18.orig/defs.h crash-4.0-2.18/defs.h --- crash-4.0-2.18.orig/defs.h 2006-07-05 23:46:10.000000000 -0400 +++ crash-4.0-2.18/defs.h 2006-07-06 06:30:12.000000000 -0400 @@ -91,6 +91,7 @@ #define STREQ(A, B) (A && B && (strcmp((char *)(A), (char *)(B)) == 0)) #define STRNEQ(A, B) (A && B && \ (strncmp((char *)(A), (char *)(B), strlen((char *)(B))) == 0)) +#define PATHEQ(A, B) (A && B && (pathcmp((char *)(A), (char *)(B)) == 0)) #define BZERO(S, N) (memset(S, NULLCHAR, N)) #define BCOPY(S, D, C) (memcpy(D, S, C)) #define BNEG(S, N) (memset(S, 0xff, N)) @@ -2876,6 +2877,7 @@ int empty_list(ulong); int machine_type(char *); void command_not_supported(void); void option_not_supported(int); +int pathcmp(char* p1, char* p2); /* diff -upNr crash-4.0-2.18.orig/filesys.c crash-4.0-2.18/filesys.c --- crash-4.0-2.18.orig/filesys.c 2006-07-05 23:46:09.000000000 -0400 +++ crash-4.0-2.18/filesys.c 2006-07-06 06:30:22.000000000 -0400 @@ -1193,7 +1193,7 @@ cmd_mount(void) continue; for (i = 0; i < c; i++) { - if (STREQ(arglist[i], spec_string)) + if (PATHEQ(arglist[i], spec_string)) found = TRUE; } if (found) { diff -upNr crash-4.0-2.18.orig/tools.c crash-4.0-2.18/tools.c --- crash-4.0-2.18.orig/tools.c 2006-07-05 23:46:10.000000000 -0400 +++ crash-4.0-2.18/tools.c 2006-07-06 06:28:01.000000000 -0400 @@ -4328,3 +4328,23 @@ option_not_supported(int c) error(FATAL, "-%c option not supported on this architecture or kernel\n", (char)c); } + +/* + * The function to compare two device paths + */ +int +pathcmp(char* p1, char* p2) +{ + char c1, c2; + + do { + if ((c1 = *p1++) == '/') + while(*p1 == '/'){ p1++; } + if ((c2 = *p2++) == '/') + while(*p2 == '/'){ p2++; } + if (c1 == '\0') + return ((c2 == '/') && (*p2 == '\0')) ? 0 : c1 - c2; + } while (c1 == c2); + + return ( (c2 == '\0') && (c1 == '/') && (*p1 == '\0')) ? 0 : c1 - c2; +}