| /* |
| * LTszoff.c -- Lsof Test small file (< 32 bits) size and offset tests |
| * |
| * V. Abell |
| * Purdue University |
| */ |
| |
| |
| /* |
| * Copyright 2002 Purdue Research Foundation, West Lafayette, Indiana |
| * 47907. All rights reserved. |
| * |
| * Written by V. Abell. |
| * |
| * This software is not subject to any license of the American Telephone |
| * and Telegraph Company or the Regents of the University of California. |
| * |
| * Permission is granted to anyone to use this software for any purpose on |
| * any computer system, and to alter it and redistribute it freely, subject |
| * to the following restrictions: |
| * |
| * 1. Neither the authors nor Purdue University are responsible for any |
| * consequences of the use of this software. |
| * |
| * 2. The origin of this software must not be misrepresented, either by |
| * explicit claim or by omission. Credit to the authors and Purdue |
| * University must appear in documentation and sources. |
| * |
| * 3. Altered versions must be plainly marked as such, and must not be |
| * misrepresented as being the original software. |
| * |
| * 4. This notice may not be removed or altered. |
| */ |
| |
| #ifndef lint |
| static char copyright[] = |
| "@(#) Copyright 2002 Purdue Research Foundation.\nAll rights reserved.\n"; |
| #endif |
| |
| #include "LsofTest.h" |
| #include "lsof_fields.h" |
| |
| |
| /* |
| * Pre-definitions that might be undefined by dialects |
| */ |
| |
| #define OFFTST_STAT 1 /* offset tests status */ |
| |
| |
| #if defined(LT_DIAL_linux) |
| /* |
| * Linux-specific items |
| */ |
| |
| #undef OFFTST_STAT |
| #define OFFTST_STAT 0 /* Linux lsof may not be able to report |
| * offsets -- see the function |
| * ck_Linux_offset_support() */ |
| |
| _PROTOTYPE(static int ck_Linux_offset_support,(void)); |
| #endif /* defined(LT_DIAL_linux) */ |
| |
| |
| /* |
| * Local definitions |
| */ |
| |
| #define TYTST_SZ 0 /* size test type */ |
| #define TYTST_0to 1 /* 0t offset test type */ |
| #define TYTST_0xo 2 /* 0x offset test type */ |
| #define TSTFSZ 32768 /* test file size */ |
| |
| |
| /* |
| * Globals |
| */ |
| |
| int Fd = -1; /* test file descriptor; open if >= 0 */ |
| pid_t MyPid = (pid_t)0; /* PID of this process */ |
| char *Path = (char *)NULL; /* test file path; none if NULL */ |
| char *Pn = (char *)NULL; /* program name */ |
| |
| |
| /* |
| * Local function prototypes |
| */ |
| |
| _PROTOTYPE(static void cleanup,(void)); |
| _PROTOTYPE(static char *testlsof,(int tt, char *opt, char *xval)); |
| |
| |
| /* |
| * Main program |
| */ |
| |
| int |
| main(argc, argv) |
| int argc; /* argument count */ |
| char *argv[]; /* arguments */ |
| { |
| char buf[2048]; /* temporary buffer */ |
| int do_offt = OFFTST_STAT; /* do offset tests if == 1 */ |
| char *em; /* error message pointer */ |
| int ti; /* temporary index */ |
| char *tcp; /* temporary character pointer */ |
| char *tstsz = (char *)NULL; /* size test status */ |
| char *tst0to = (char *)NULL; /* offset 0t form test */ |
| char *tst0xo = (char *)NULL; /* offset 0x form test */ |
| int xv = 0; /* exit value */ |
| char xbuf[64]; /* expected value buffer */ |
| /* |
| * Get program name and PID, issue start message, and build space prefix. |
| */ |
| if ((Pn = strrchr(argv[0], '/'))) |
| Pn++; |
| else |
| Pn = argv[0]; |
| MyPid = getpid(); |
| (void) printf("%s ... ", Pn); |
| (void) fflush(stdout); |
| PrtMsg((char *)NULL, Pn); |
| /* |
| * Process arguments. |
| */ |
| if (ScanArg(argc, argv, "hp:", Pn)) |
| xv = 1; |
| if (xv || LTopt_h) { |
| (void) PrtMsg("usage: [-h] [-p path]", Pn); |
| PrtMsg (" -h print help (this panel)", Pn); |
| PrtMsgX (" -p path define test file path", Pn, cleanup, xv); |
| } |
| |
| #if defined(LT_DIAL_linux) |
| /* |
| * If this is Linux, see if lsof can report file offsets. |
| */ |
| do_offt = ck_Linux_offset_support(); |
| #endif /* defined(LT_DIAL_linux) */ |
| |
| /* |
| * See if lsof can be executed and can access kernel memory. |
| */ |
| if ((em = IsLsofExec())) |
| (void) PrtMsgX(em, Pn, cleanup, 1); |
| if ((em = CanRdKmem())) |
| (void) PrtMsgX(em, Pn, cleanup, 1); |
| /* |
| * If a path was supplied in an "-p path" option, use it. Otherwise construct |
| * a path in the CWD. |
| */ |
| if (!(Path = LTopt_p)) { |
| (void) snprintf(buf, sizeof(buf) - 1, "./config.LTszoff%ld", |
| (long)MyPid); |
| buf[sizeof(buf) - 1] = '\0'; |
| Path = MkStrCpy(buf, &ti); |
| } |
| /* |
| * Open a new test file at the specified path. |
| */ |
| (void) unlink(Path); |
| if ((Fd = open(Path, O_RDWR|O_CREAT, 0600)) < 0) { |
| (void) fprintf(stderr, "ERROR!!! can't open %s\n", Path); |
| |
| print_file_error: |
| |
| MsgStat = 1; |
| (void) snprintf(buf, sizeof(buf) - 1, " Errno %d: %s", |
| errno, strerror(errno)); |
| buf[sizeof(buf) - 1] = '\0'; |
| (void) PrtMsgX(buf, Pn, cleanup, 1); |
| } |
| /* |
| * Write the test file to its expected size. |
| */ |
| for (ti = 0; ti < sizeof(buf); ti++) { |
| buf[ti] = (char)(ti & 0xff); |
| } |
| for (ti = 0; ti < TSTFSZ; ti += sizeof(buf)) { |
| if (write(Fd, buf, sizeof(buf)) != sizeof(buf)) { |
| (void) fprintf(stderr, "ERROR!!! can't write %d bytes to %s\n", |
| (int)sizeof(buf), Path); |
| goto print_file_error; |
| } |
| } |
| /* |
| * Fsync() the file. |
| */ |
| if (fsync(Fd)) { |
| (void) fprintf(stderr, "ERROR!!! can't fsync %s\n", Path); |
| goto print_file_error; |
| } |
| /* |
| * Do the tests. Skip offset tests as indicated. |
| */ |
| (void) snprintf(xbuf, sizeof(xbuf) - 1, "%d", TSTFSZ); |
| xbuf[sizeof(xbuf) - 1] = '\0'; |
| if ((tstsz = testlsof(TYTST_SZ, "-s", xbuf))) |
| (void) PrtMsg(tstsz, Pn); |
| if (do_offt) { |
| (void) snprintf(xbuf, sizeof(xbuf) - 1, "0t%d", TSTFSZ); |
| xbuf[sizeof(xbuf) - 1] = '\0'; |
| if ((tst0to = testlsof(TYTST_0to, "-o", xbuf))) |
| (void) PrtMsg(tst0to, Pn); |
| (void) snprintf(xbuf, sizeof(xbuf) - 1, "0x%x", TSTFSZ); |
| xbuf[sizeof(xbuf) - 1] = '\0'; |
| if ((tst0xo = testlsof(TYTST_0xo, "-oo2", xbuf))) |
| (void) PrtMsg(tst0to, Pn); |
| } else { |
| PrtMsg("WARNING!!! lsof can't return file offsets for this dialect,", |
| Pn); |
| PrtMsg(" so offset tests have been disabled.", Pn); |
| } |
| /* |
| * Compute exit value and exit. |
| */ |
| if (tstsz || tst0to || tst0xo) { |
| tcp = (char *)NULL; |
| xv = 1; |
| } else { |
| tcp = "OK"; |
| xv = 0; |
| } |
| (void) PrtMsgX(tcp, Pn, cleanup, xv); |
| return(0); |
| } |
| |
| |
| #if defined(LT_DIAL_linux) |
| /* |
| * ck_Linux_offset_support() -- see if lsof can report offsets for this |
| * Linux implementation |
| */ |
| |
| static int |
| ck_Linux_offset_support() |
| { |
| char buf[1024]; /* lsof output line buffer */ |
| int bufl = sizeof(buf); /* size of buf[] */ |
| char *opv[5]; /* option vector for lsof */ |
| int rv = 1; /* return value: |
| * 0 == no lsof offset support |
| * 1 == lsof offset support */ |
| /* |
| * Ask lsof to report the test's FD zero offset. |
| */ |
| if (IsLsofExec()) |
| return(0); |
| opv[0] = "-o"; |
| snprintf(buf, bufl - 1, "-p%d", (int)getpid()); |
| opv[1] = buf; |
| opv[2] = "-ad0"; |
| opv[3] = "+w"; |
| opv[4] = (char *)NULL; |
| if (ExecLsof(opv)) |
| return(0); |
| /* |
| * Read the lsof output. Look for a line with "WARNING: can't report offset" |
| * in it. If it is found, then this Linux lsof can't report offsets. |
| */ |
| while(fgets(buf, bufl - 1, LsofFs)) { |
| if (strstr(buf, "WARNING: can't report offset")) { |
| rv = 0; |
| break; |
| } |
| } |
| (void) StopLsof(); |
| return(rv); |
| } |
| #endif /* defined(LT_DIAL_linux) */ |
| |
| |
| /* |
| * cleanup() -- release resources |
| */ |
| |
| static void |
| cleanup() |
| { |
| if (Fd >= 0) { |
| (void) close(Fd); |
| Fd = -1; |
| if (Path) { |
| (void) unlink(Path); |
| Path = (char *)NULL; |
| } |
| } |
| } |
| |
| |
| /* |
| * testlsof() -- test the open file with lsof |
| */ |
| |
| static char * |
| testlsof(tt, opt, xval) |
| int tt; /* test type -- TYTST_* symbol */ |
| char *opt; /* extra lsof options */ |
| char *xval; /* expected value */ |
| { |
| char buf[2048]; /* temporary buffer */ |
| char *cem; /* current error message pointer */ |
| LTfldo_t *cmdp; /* command pointer */ |
| LTfldo_t *devp; /* device pointer */ |
| int ff = 0; /* file found status */ |
| LTfldo_t *fop; /* field output pointer */ |
| char ibuf[64]; /* inode number buffer */ |
| LTfldo_t *inop; /* inode number pointer */ |
| LTdev_t lsofdc; /* lsof device components */ |
| int nf; /* number of fields */ |
| LTfldo_t *offp; /* offset pointer */ |
| char *opv[4]; /* option vector for ExecLsof() */ |
| char *pem = (char *)NULL; /* previous error message pointer */ |
| pid_t pid; /* PID */ |
| int pids = 0; /* PID found status */ |
| struct stat sb; /* stat(2) buffer */ |
| LTdev_t stdc; /* stat(2) device components */ |
| LTfldo_t *szp; /* size pointer */ |
| char *tcp; /* temporary character pointer */ |
| int ti; /* temporary integer */ |
| char *tnm1, *tnm2; /* test names */ |
| int ts = 0; /* test status flag */ |
| LTfldo_t *typ; /* file type pointer */ |
| /* |
| * Check the test type. |
| */ |
| switch (tt) { |
| case TYTST_SZ: |
| tnm1 = ""; |
| tnm2 = " size"; |
| break; |
| case TYTST_0to: |
| tnm1 = " 0t"; |
| tnm2 = " offset"; |
| break; |
| case TYTST_0xo: |
| tnm1 = " 0x"; |
| tnm2 = " offset"; |
| break; |
| default: |
| (void) snprintf(buf, sizeof(buf) - 1, |
| "ERROR!!! illegal test type: %d", tt); |
| buf[sizeof(buf) - 1] = '\0'; |
| (void) PrtMsgX(buf, Pn, cleanup, 1); |
| } |
| /* |
| * Get test file's information. |
| */ |
| if (stat(Path, &sb)) { |
| (void) snprintf(buf, sizeof(buf) - 1, |
| "ERROR!!! can't stat(2) %s: %s", Path, strerror(errno)); |
| buf[sizeof(buf) - 1] = '\0'; |
| PrtMsgX(buf, Pn, cleanup, 1); |
| } |
| /* |
| * Extract components from test file's stat buffer. |
| */ |
| if ((cem = ConvStatDev(&sb.st_dev, &stdc))) |
| PrtMsgX(buf, Pn, cleanup, 1); |
| (void) snprintf(ibuf, sizeof(ibuf) - 1, "%u", (unsigned int)sb.st_ino); |
| ibuf[sizeof(ibuf) - 1] = '\0'; |
| /* |
| * Complete the option vector and start lsof execution. |
| */ |
| ti = 0; |
| if (opt && *opt) |
| opv[ti++] = opt; |
| |
| #if defined(USE_LSOF_C_OPT) |
| opv[ti++] = "-C"; |
| #else /* !defined(USE_LSOF_C_OPT) */ |
| opv[ti++] = "--"; |
| #endif /* defined(USE_LSOF_C_OPT) */ |
| |
| opv[ti++] = Path; |
| opv[ti] = (char *)NULL; |
| if ((cem = ExecLsof(opv))) |
| return(cem); |
| /* |
| * Read lsof output. |
| */ |
| while (!ff && !cem && (fop = RdFrLsof(&nf, &cem))) { |
| if (cem) { |
| if (pem) |
| (void) PrtMsg(pem, Pn); |
| return(cem); |
| } |
| switch (fop->ft) { |
| case LSOF_FID_PID: |
| |
| /* |
| * This is a process information line. |
| */ |
| pid = (pid_t)atoi(fop->v); |
| pids = 1; |
| cmdp = (LTfldo_t *)NULL; |
| for (fop++, ti = 1; ti < nf; fop++, ti++) { |
| switch (fop->ft) { |
| case LSOF_FID_CMD: |
| cmdp = fop; |
| break; |
| } |
| } |
| if (!cmdp || (pid != MyPid)) |
| pids = 0; |
| break; |
| case LSOF_FID_FD: |
| |
| /* |
| * This is a file descriptor line. Make sure its number matches the |
| * test file's descriptor number. |
| */ |
| if (!pids) |
| break; |
| for (ti = 0, tcp = fop->v; *tcp; tcp++) { |
| |
| /* |
| * Convert file descriptor to a number. |
| */ |
| if (*tcp == ' ') |
| continue; |
| if (((int)*tcp < (int)'0') || ((int)*tcp > (int)'9')) { |
| ti = -1; |
| break; |
| } |
| ti = (ti * 10) + (int)*tcp - (int)'0'; |
| } |
| if (Fd != ti) |
| break; |
| /* |
| * Scan for device, inode, offset, size and type fields. |
| */ |
| devp = inop = offp = szp = typ = (LTfldo_t *)NULL; |
| for (fop++, ti = 1; ti < nf; fop++, ti++) { |
| switch (fop->ft) { |
| case LSOF_FID_DEVN: |
| devp = fop; |
| break; |
| case LSOF_FID_INODE: |
| inop = fop; |
| break; |
| case LSOF_FID_OFFSET: |
| offp = fop; |
| break; |
| case LSOF_FID_SIZE: |
| szp = fop; |
| break; |
| case LSOF_FID_TYPE: |
| typ = fop; |
| break; |
| } |
| } |
| /* |
| * Check the results of the file descriptor field scan. |
| */ |
| if (!devp || !inop || !typ) |
| break; |
| if (strcasecmp(typ->v, "reg") && strcasecmp(typ->v, "vreg")) |
| break; |
| if ((cem = ConvLsofDev(devp->v, &lsofdc))) { |
| if (pem) |
| (void) PrtMsg(pem, Pn); |
| pem = cem; |
| break; |
| } |
| if ((stdc.maj != lsofdc.maj) |
| || (stdc.min != lsofdc.min) |
| || (stdc.unit != lsofdc.unit) |
| || strcmp(inop->v, ibuf) |
| ) { |
| break; |
| } |
| /* |
| * The specified file has been located. Do the specified test. |
| */ |
| ff = 1; |
| fop = (tt == TYTST_SZ) ? szp : offp; |
| if (!fop) { |
| (void) snprintf(buf, sizeof(buf) - 1, |
| "ERROR!!! %s%s test, but no lsof%s", tnm1, tnm2, tnm2); |
| ts = 1; |
| } else if (strcmp(fop->v, xval)) { |
| (void) snprintf(buf, sizeof(buf) - 1, |
| "ERROR!!! %s%s mismatch: expected %s, got %s", |
| tnm1, tnm2, xval, fop->v); |
| ts = 1; |
| } |
| if (ts) { |
| buf[sizeof(buf) - 1] = '\0'; |
| cem = MkStrCpy(buf, &ti); |
| if (pem) |
| (void) PrtMsg(pem, Pn); |
| pem = cem; |
| } |
| break; |
| } |
| } |
| (void) StopLsof(); |
| if (!ff) { |
| (void) snprintf(buf, sizeof(buf) - 1, |
| "ERROR!!! test file %s not found by lsof", Path); |
| buf[sizeof(buf) - 1] = '\0'; |
| cem = MkStrCpy(buf, &ti); |
| if (pem) |
| (void) PrtMsg(pem, Pn); |
| return(cem); |
| } |
| return(pem); |
| } |