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4.99.1
tests/LTlib.c
1 053 строки
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Chen
Expose functionality as a re-usable library - Part 2 (#284)
12 апр 2023, 09:01
Не верифицирован
12 апр 2023, 09:01
6dca348
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/* * LTlib.c -- the lsof test library * * 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. */ #include "LsofTest.h" /* * Pre-defintions that may be changed by a specific dialect */ #define X2DEV_T unsigned int /* cast for result of x2dev() */ #define XDINDEV \ 8 /* number of hex digits in an lsof \ * device field -- should be \ * 2 X sizeof(X2DEV_T) */ #if defined(LT_DIAL_aix) /* * AIX-specific items */ # include <sys/sysmacros.h> # if defined(LT_AIXA) && LT_AIXA >= 1 /* * Note: the DEVNO64 and ISDEVNO54 #define's come from <sys/sysmacros.h>, but * only when _KERNEL is #define'd. */ # undef DEVNO64 # define DEVNO64 0x8000000000000000LL # undef ISDEVNO64 # define ISDEVNO64(d) (((ulong)(d)&DEVNO64) ? 1 : 0) /* * Define major and minor extraction macros that work on 64 bit AIX * architectures. */ # define major_S(d) (ISDEVNO64(d) ? major64(d) : minor(d & ~SDEV_REMOTE)) # define minor_S(d) \ (ISDEVNO64(d) ? (minor64(d) & ~SDEV_REMOTE) : minor(d)) # undef X2DEV_T # define X2DEV_T unsigned long long # undef XDINDEV # define XDINDEV 16 # define major_X(dp, em) major_S(x2dev(dp, em)) # define minor_X(dp, em) minor_S(x2dev(dp, em)) # endif /* defined(LT_AIXA) && LT_AIXA>=1 */ #endif /* defined(LT_DIAL_aix) */ #if defined(LT_DIAL_bsdi) /* * BSDI-specific items */ # define minor_S(dev) dv_subunit(dev) # define unit_S(dev) dv_unit(dev) # define minor_X(dp, em) dv_subunit(x2dev(dp, em)) # define unit_X(dp, em) dv_unit(x2dev(dp, em)) #endif /* defined(LT_DIAL_bsdi) */ #if defined(LT_DIAL_freebsd) /* *FreeBSD-specific items */ # undef XDINDEV # define XDINDEV 16 # if defined(LT_DEV64) # undef X2DEV_T # define X2DEV_T unsigned long long # endif /* defined(LT_DEV64) */ #endif /* defined(LT_DIAL_freebsd) */ #if defined(LT_DIAL_osr) /* * OpenUNIX-specific items */ # include <sys/sysmacros.h> #endif /* defined(LT_DIAL_osr) */ #if defined(LT_DIAL_ou) /* * OpenUNIX-specific items */ # include <sys/mkdev.h> #endif /* defined(LT_DIAL_ou) */ #if defined(LT_DIAL_solaris) /* * Solaris-specific items */ # include <sys/sysmacros.h> /* * Define maximum major device number in a stat(2) dev_t */ # if LT_VERS >= 20501 # define LT_MJX \ L_MAXMAJ /* Get maximum major device number from \ * <sys/sysmacros.h>. */ # else /* LT_VERS<20501 */ # define LT_MJX \ 0x3fff /* Avoid <sys/sysmacros.h> when \ * Solaris < 2.5.1. */ # endif /* LT_VERS>=20501 */ # define major_S(dev) ((int)((dev >> L_BITSMINOR) & LT_MJX)) # define minor_S(dev) ((int)(dev & L_MAXMIN)) # if defined(LT_DEV64) # undef X2DEV_T # define X2DEV_T unsigned long long # undef XDINDEV # define XDINDEV 16 # endif /* !defined(LT_DEV64) */ # define major_X(dp, em) (major_S(x2dev(dp, em))) # define minor_X(dp, em) (minor_S(x2dev(dp, em))) #endif /* defined(LT_DIAL_solaris) */ #if defined(LT_DIAL_uw) /* * UnixWare-specific items */ # include <sys/mkdev.h> #endif /* defined(LT_DIAL_uw) */ #if defined(LT_DIAL_linux) /* * Linux-specific items */ # include <sys/sysmacros.h> #endif /* defined(LT_DIAL_linux) */ /* * Global variables */ int LsofFd = -1; /* lsof pipe FD */ FILE *LsofFs = (FILE *)NULL; /* stream for lsof pipe FD */ char *LsofPath = (char *)NULL; /* path to lsof executable */ pid_t LsofPid = (pid_t)0; /* PID of lsof child process */ int LTopt_h = 0; /* "-h" option's switch value */ char *LTopt_p = (char *)NULL; /* "-p path" option's path value */ int MsgStat = 0; /* message status: 1 means prefix needs * to be issued */ /* * Local static variables */ static int Afo = 0; /* Fo[] structures allocated */ static char *GOv = (char *)NULL; /* option `:' value pointer */ static int GOx1 = 1; /* first opt[][] index */ static int GOx2 = 0; /* second opt[][] index */ static LTfldo_t *Fo = (LTfldo_t *)NULL; /* allocated LTfldo_t structures */ static int Ufo = 0; /* Fo[] structures used */ /* * Local function prototypes */ static void closepipe(void); static void getlsofpath(void); static int GetOpt(int ct, char *opt[], char *rules, char **em, char *pn); static X2DEV_T x2dev(char *x, char **em); /* * Default major, minor, and unit macros. */ #if !defined(major_S) # define major_S major #endif /* defined(major_S) */ #if !defined(minor_S) # define minor_S minor #endif /* defined(minor_S) */ #if !defined(unit_S) # define unit_S(x) 0 #endif /* defined(unit_S) */ #if !defined(major_X) # define major_X(dp, em) major(x2dev(dp, em)) #endif /* defined(major_X) */ #if !defined(minor_X) # define minor_X(dp, em) minor(x2dev(dp, em)) #endif /* defined(minor_X) */ #if !defined(unit_X) # define unit_X(dp, em) 0 #endif /* defined(unit_X) */ /* * CanRdKmem() -- can lsof read kernel memory devices? */ char *CanRdKmem() { #if defined(LT_KMEM) char buf[2048]; /* temporary buffer */ char *dn; /* memory device name */ char *em; /* error message pointer */ int fd; /* temporary file descriptor */ struct stat sb; /* memory device stat(2) buffer */ int ti; /* temporary integer */ /* * Get the lsof path. If it is not the default, check no further. */ (void)getlsofpath(); if (!strcmp(LsofPath, LT_DEF_LSOF_PATH)) return ((char *)NULL); /* * Check /dev/kmem access. */ dn = "/dev/kmem"; if (stat(dn, &sb)) { em = "stat"; kmem_error: (void)snprintf(buf, sizeof(buf) - 1, "ERROR!!! can't %s(%s): %s\n", em, dn, strerror(errno)); buf[sizeof(buf) - 1] = '\0'; return (MkStrCpy(buf, &ti)); } if ((fd = open(dn, O_RDONLY, 0)) < 0) { em = "open"; goto kmem_error; } (void)close(fd); /* * Check /dev/mem access. */ dn = "/dev/mem"; if (stat(dn, &sb)) { /* * If /dev/mem can't be found, ignore the error. */ return ((char *)NULL); } if ((fd = open(dn, O_RDONLY, 0)) < 0) { em = "open"; goto kmem_error; } (void)close(fd); #endif /* defined(LT_KMEM) */ return ((char *)NULL); } /* * closepipe() -- close pipe from lsof */ static void closepipe() { if (LsofFd >= 0) { /* * A pipe from lsof is open. Close it and the associated stream. */ if (LsofFs) { (void)fclose(LsofFs); LsofFs = (FILE *)NULL; } (void)close(LsofFd); LsofFd = -1; } } /* * ConvLsofDev() -- convert lsof device string * * Note: this function is dialect-specific. */ char *ConvLsofDev(char *dev, /* lsof device string -- the value to the * LSOF_FID_DEVN field of a LSOF_FID_FD block * (see lsof_fields.h) */ LTdev_t *ldev) /* results are returned to this structure */ { char *dp; /* device pointer */ char *em; /* error message pointer */ int tlen; /* temporary length */ /* * Check function arguments. * * Establish values for decoding the device string. */ if (!dev) return ("ERROR!!! no ConvLsofDev() device"); if (!ldev) return ("ERROR!!! no ConvLsofDev() result pointer"); if (strncmp(dev, "0x", 2)) return ("ERROR!!! no leading 0x in ConvLsofDev() device"); dp = dev + 2; if (((tlen = (int)strlen(dp)) < 1) || (tlen > XDINDEV)) return ("ERROR!!! bad ConvLsofDev() device length"); /* * Use the pre-defined *_X() macros to do the decomposition. */ ldev->maj = (unsigned int)major_X(dp, &em); if (em) return (em); ldev->min = (unsigned int)minor_X(dp, &em); if (em) return (em); ldev->unit = (unsigned int)unit_X(dp, &em); return (em); } /* * ConvStatDev() -- convert stat(2) device number * * Note: this function is dialect-specific. */ char *ConvStatDev(dev_t *dev, /* device number to be converted */ LTdev_t *ldev) /* results are returned to this structure */ { /* * Check function arguments. */ if (!dev) return ("ERROR!!! no ConvStatDev() device"); if (!ldev) return ("ERROR!!! no ConvStatDev() result pointer"); /* * Use the pre-defined *_S() macros to do the decomposition. */ ldev->maj = (unsigned int)major_S(*dev); ldev->min = (unsigned int)minor_S(*dev); ldev->unit = (unsigned int)unit_S(*dev); return ((char *)NULL); } /* * ExecLsof() -- execute lsof with full field output and a NUL field terminator * in a child process */ char *ExecLsof(char **opt) /* lsof options -- a pointer to an * array of character pointers, * terminated by a NULL pointer */ { static char **av = (char **)NULL; /* lsof argument vector, dynamically * allocated */ static int ava = 0; /* **av entries allocated */ char buf[2048]; /* temporary buffer */ char *em; /* error message pointer */ int fd; /* temporary file descriptor */ int optc; /* option count */ int nf; /* number of files */ int p[2]; /* pipe FDs */ char **tcpp; /* temporary character pointer * pointer */ int ti; /* temporary integer */ int tlen; /* temporary length */ pid_t tpid; /* temporary PID holder */ /* * It's an error if lsof is already in execution or if no lsof options * were supplied. */ (void)getlsofpath(); if (LsofPid) return ("ERROR!!! ExecLsof() says lsof is already in execution"); if (!opt) return ("ERROR!!! no ExecLsof() option list"); for (optc = 0, tcpp = opt; *tcpp; optc++, tcpp++) ; /* * Make sure lsof is executable. */ if ((em = IsLsofExec())) return (em); /* * Open a pipe through which lsof can return output. */ if (pipe(p)) { (void)snprintf(buf, sizeof(buf) - 1, "ERROR!!! can't open pipe: %s", strerror(errno)); return (MkStrCpy(buf, &ti)); } /* * Allocate and build an argument vector. The first entry will be set * to "lsof", the second to "-wFr", and the third to "-F0". Additional * entries will be set as supplied by the caller. */ if ((optc + 4) > ava) { tlen = (int)(sizeof(char *) * (optc + 4)); if (!av) av = (char **)malloc(tlen); else av = (char **)realloc((void *)av, tlen); if (!av) { (void)snprintf( buf, sizeof(buf) - 1, "LTlib: ExecLsof() can't allocat pointers for %d arguments", optc + 4); return (MkStrCpy(buf, &ti)); } ava = optc + 4; } for (ti = 0, tcpp = opt; ti < (optc + 3); ti++) { switch (ti) { case 0: av[ti] = "lsof"; break; case 1: av[ti] = "-wFr"; break; case 2: av[ti] = "-F0"; break; default: av[ti] = *tcpp; tcpp++; } } av[ti] = (char *)NULL; /* * Fork a child process to run lsof. */ switch ((tpid = fork())) { case (pid_t)0: /* * This is the child process. * * First close all file descriptors except the output side of the pipe. * * Make the output side of the pipe STDOUT and STDERR. */ for (fd = 0, nf = getdtablesize(); fd < nf; fd++) { if (fd == p[1]) continue; (void)close(fd); } if (p[1] != 1) (void)dup2(p[1], 1); if (p[1] != 2) (void)dup2(p[1], 2); if ((p[1] != 1) && (p[1] != 2)) (void)close(p[1]); /* * Execute lsof. */ (void)execv(LsofPath, av); _exit(0); /* (Shouldn't get here.) */ case (pid_t)-1: /* * A fork error occurred. Form and return a message. */ (void)snprintf(buf, sizeof(buf) - 1, "ERROR!!! ExecLsof() can't fork: %s", strerror(errno)); buf[sizeof(buf) - 1] = '\0'; return (MkStrCpy(buf, &ti)); default: /* * This is the parent. * * Save the lsof child PID. * * Close the output side of the pipe. * * Save the input side of the pipe as LsofFd; open a stream for it. */ LsofPid = tpid; (void)close(p[1]); LsofFd = p[0]; if (!(LsofFs = fdopen(LsofFd, "r"))) return ("ERROR!!! ExecLsof() can't open stream to lsof output FD"); } /* * Wait a bit for lsof to start and put something in its pipe, then return * an "All is well." response. */ sleep(1); return ((char *)NULL); } /* * getlsofpath() -- get lsof path, either from LT_LSOF_PATH in the environment * or from LT_DEF_LSOF_PATH */ static void getlsofpath() { char *tcp; /* temporary character pointer */ int ti; /* temporary integer */ if (LsofPath) return; if ((tcp = getenv("LT_LSOF_PATH"))) LsofPath = MkStrCpy(tcp, &ti); else LsofPath = LT_DEF_LSOF_PATH; } /* * GetOpt() -- Local get option * * Borrowed from lsof's main.c source file. * * Liberally adapted from the public domain AT&T getopt() source, * distributed at the 1985 UNIFORM conference in Dallas * * The modifications allow `?' to be an option character and allow * the caller to decide that an option that may be followed by a * value doesn't have one -- e.g., has a default instead. */ static int GetOpt(int ct, /* option count */ char *opt[], /* options */ char *rules, /* option rules */ char **em, /* error message return */ char *pn) { register int c; /* character value */ register char *cp = (char *)NULL; /* character pointer */ char embf[2048]; /* error message buffer */ int tlen; /* temporary message length from * MkStrCpy() */ *em = (char *)NULL; if (GOx2 == 0) { /* * Move to a new entry of the option array. * * EOF if: * * Option list has been exhausted; * Next option doesn't start with `-' or `+'; * Next option has nothing but `-' or `+'; * Next option is ``--'' or ``++''. */ if (GOx1 >= ct || (opt[GOx1][0] != '-' && opt[GOx1][0] != '+') || !opt[GOx1][1]) return (EOF); if (strcmp(opt[GOx1], "--") == 0 || strcmp(opt[GOx1], "++") == 0) { GOx1++; return (EOF); } GOx2 = 1; } /* * Flag `:' option character as an error. * * Check for a rule on this option character. */ if ((c = opt[GOx1][GOx2]) == ':') { (void)snprintf(embf, sizeof(embf) - 1, "ERROR!!! colon is an illegal option character."); embf[sizeof(embf) - 1] = '\0'; *em = MkStrCpy(embf, &tlen); } else if (!(cp = strchr(rules, c))) { (void)snprintf(embf, sizeof(embf) - 1, "ERROR!!! illegal option character: %c", c); embf[sizeof(embf) - 1] = '\0'; *em = MkStrCpy(embf, &tlen); } if (*em) { /* * An error was detected. * * Advance to the next option character. * * Return the character causing the error. */ if (opt[GOx1][++GOx2] == '\0') { GOx1++; GOx2 = 0; } return (c); } if (*(cp + 1) == ':') { /* * The option may have a following value. The caller decides if it * does. * * Don't indicate that an option of ``--'' is a possible value. * * Finally, on the assumption that the caller will decide that the * possible value belongs to the option, position to the option * following the possible value, so that the next call to GetOpt() will * find it. */ if (opt[GOx1][GOx2 + 1] != '\0') { GOv = &opt[GOx1++][GOx2]; } else if (++GOx1 >= ct) GOv = (char *)NULL; else { GOv = opt[GOx1]; if (strcmp(GOv, "--") == 0) GOv = (char *)NULL; else GOx1++; } GOx2 = 0; } else { /* * The option character stands alone with no following value. * * Advance to the next option character. */ if (opt[GOx1][++GOx2] == '\0') { GOx2 = 0; GOx1++; } GOv = (char *)NULL; } /* * Return the option character. */ return (c); } /* * IsLsofExec() -- see if lsof is executable */ char *IsLsofExec() { char buf[2048]; /* temporary buffer */ int len; /* temporary length */ (void)getlsofpath(); if (access(LsofPath, X_OK) < 0) { (void)snprintf(buf, sizeof(buf) - 1, "ERROR!!! can't execute %s: %s", LsofPath, strerror(errno)); return (MkStrCpy(buf, &len)); } return ((char *)NULL); } /* * LTlibClean() -- clean up LTlib resource accesses */ void LTlibClean() { (void)StopLsof(); } /* * MkStrCpy() -- make string copy */ char *MkStrCpy(char *src, /* string source to copy */ int *len) /* returned length allocation */ { char *rp; /* return pointer */ int srclen; /* source string length */ if (!src) { (void)fprintf(stderr, "ERROR!!! no string supplied to MkStrCpy()\n"); exit(1); } srclen = (int)strlen(src); *len = srclen++; if (!(rp = (char *)malloc(srclen))) { (void)fprintf(stderr, "ERROR!!! MkStrCpy() -- no malloc() space"); exit(1); } (void)strcpy(rp, src); return (rp); } /* * PrtMsg() -- print message */ void PrtMsg(mp, pn) char *mp; /* message pointer -- may be NULL to * trigger space prefix initialization */ char *pn; /* program name */ { static int pfxlen = -1; /* prefix length, based on program */ /* name -- computed on first call * when pfxlen == -1 */ static char *pfx = (char *)NULL; /* prefix (spaces) */ int ti; /* temporary index */ if (pfxlen == -1) { /* * This is the first call. Compute the prefix length and build the * prefix. */ if (!pn) pfxlen = 0; else pfxlen = (int)(strlen(pn)); pfxlen += (int)strlen(" ... "); if (!(pfx = (char *)malloc(pfxlen + 1))) { (void)printf("ERROR!!! not enough space for %d space prefix\n", pfxlen); exit(1); } for (ti = 0; ti < pfxlen; ti++) { pfx[ti] = ' '; } pfx[pfxlen] = '\0'; MsgStat = 0; } /* * Process the message. */ if (MsgStat) (void)printf("%s", pfx); if (mp && *mp) { (void)printf("%s\n", mp); MsgStat = 1; } } /* * PrtMsgX() -- print message and exit */ void PrtMsgX(mp, pn, f, xv) char *mp; /* message pointer */ char *pn; /* program name */ void (*f)(); /* clean-up function pointer */ int xv; /* exit value */ { if (mp) PrtMsg(mp, pn); if (f) (void)(*f)(); (void)LTlibClean(); exit(xv); } /* * RdFrLsof() -- read from lsof */ LTfldo_t *RdFrLsof(int *nf, /* number of fields receiver */ char **em) /* error message pointer receiver */ { char buf[2048]; /* temporary buffer */ int bufl = (int)sizeof(buf); /* size of buf[] */ char *blim = &buf[bufl - 1]; /* buf[] limit (last character * address) */ char *fsp; /* field start pointer */ char *tcp; /* temporary character pointer */ LTfldo_t *tfop; /* temporary field output pointer */ int ti; /* temporary index */ int tlen; /* remporary length */ char *vp; /* value character pointer */ /* * Check for errors. */ if (!em) return ((LTfldo_t *)NULL); if (!nf) { *em = "ERROR!!! RdFrLsof() not given a count return pointer"; return ((LTfldo_t *)NULL); } *em = (char *)NULL; *nf = 0; /* * If fields are in use, release their resources. */ for (ti = 0, tfop = Fo; (ti < Ufo); ti++, tfop++) { if (tfop->v) (void)free((void *)tfop->v); } Ufo = 0; /* * Read a line from lsof. */ if (!fgets(buf, bufl - 2, LsofFs)) { /* * An lsof pipe EOF has been reached. Indicate that with a NULL * pointer return, coupled with a NULL error message return pointer * (set above), and a field count of zero (set above). */ return ((LTfldo_t *)NULL); } /* * Parse the lsof line, allocating field output structures as appropriate. * * It is expected that fields will end in a NUL ('\0') or a NL ('\0') and * that a NL ends all fields in the lsof line. */ for (tcp = buf, Ufo = 0; (*tcp != '\n') && (tcp < blim); tcp++) { /* * Start a new field. The first character is the LSOF_FID_*. * * First allocate an LTfldo_t structure. */ if (Ufo >= Afo) { /* * More LTfldo_t space is required. */ Afo += LT_FLDO_ALLOC; tlen = (int)(Afo * sizeof(LTfldo_t)); if (Fo) Fo = (LTfldo_t *)realloc(Fo, tlen); else Fo = (LTfldo_t *)malloc(tlen); if (!Fo) { /* * A serious error has occurred; no LTfldo_t space is available. */ (void)snprintf( buf, bufl, "ERROR!!! RdFrLsof() can't allocate %d pointer bytes", tlen); *em = MkStrCpy(buf, &ti); *nf = -1; return ((LTfldo_t *)NULL); } } tfop = Fo + Ufo; tfop->v = (char *)NULL; Ufo++; /* * Save the LSOF_FID_* character. Then compute the field value length, * and make a copy of it. */ tfop->ft = *tcp++; fsp = tcp; tlen = 0; while (*tcp && (*tcp != '\n') && (tcp < blim)) { tcp++; tlen++; } if (!(vp = (char *)malloc(tlen + 1))) { /* * A serious error has occurred; there's no space for the field * value. */ (void)snprintf(buf, bufl, "ERROR!!! RdFrLsof() can't allocate %d field bytes", tlen + 1); *em = MkStrCpy(buf, &ti); *nf = -1; return ((LTfldo_t *)NULL); } (void)memcpy((void *)vp, (void *)fsp, tlen); vp[tlen] = '\0'; tfop->v = vp; if (*tcp == '\n') break; if (tcp >= blim) { /* * The lsof line has no NL terminator; that's an error. */ *em = "ERROR!!! RdFrLsof() didn't find a NL"; *nf = -1; return ((LTfldo_t *)NULL); } } /* * The end of the lsof line has been reached. If no fields were assembled, * return an error indicate. Otherwise return the fields and their count. */ if (!Ufo) { *em = "ERROR!!! RdFrLsof() read an empty lsof line"; *nf = -1; return ((LTfldo_t *)NULL); } *nf = Ufo; *em = (char *)NULL; return (Fo); } /* * ScanArg() -- scan arguments */ int ScanArg(int ac, /* argument count */ char *av[], /* argument pointers */ char *opt, /* option string */ char *pn) /* program name */ { char *em; /* pointer to error message returned by * GetOpt() */ char embf[2048]; /* error message buffer */ int rv = 0; /* return value */ int tc; /* temporary character value */ /* * Preset possible argument values. */ LTopt_h = 0; if (LTopt_p) { (void)free((void *)LTopt_p); LTopt_p = (char *)NULL; } /* * Process the options according to the supplied option string. */ while ((tc = GetOpt(ac, av, opt, &em, pn)) != EOF) { if (em) { rv = 1; PrtMsg(em, pn); continue; } switch (tc) { case 'h': LTopt_h = 1; break; case 'p': if (!GOv || *GOv == '-' || *GOv == '+') { rv = 1; (void)PrtMsg("ERROR!!! -p not followed by a path", pn); } else LTopt_p = GOv; break; default: rv = 1; (void)snprintf(embf, sizeof(embf) - 1, "ERROR!!! unknown option: %c", tc); PrtMsg(embf, pn); } } for (; GOx1 < ac; GOx1++) { /* * Report extraneous arguments. */ rv = 1; (void)snprintf(embf, sizeof(embf) - 1, "ERROR!!! extraneous option: \"%s\"", av[GOx1]); PrtMsg(embf, pn); } return (rv); } /* * StopLsof() -- stop a running lsof process and close the pipe from it */ void StopLsof() { pid_t pid; if (LsofPid) { /* * An lsof child process may be active. Wait for (or kill) it. */ pid = wait3(NULL, WNOHANG, NULL); if (pid != LsofPid) { (void)kill(LsofPid, SIGKILL); sleep(2); pid = wait3(NULL, WNOHANG, NULL); } LsofPid = (pid_t)0; } (void)closepipe(); } /* * x2dev() -- convert hex string to device number */ static X2DEV_T x2dev(char *x, /* hex string */ char **em) /* error message receiver */ { char buf[2048]; /* temporary message buffer */ int c; /* character holder */ X2DEV_T dev; /* device number result */ char *wx; /* working hex string pointer */ int xl; /* hex string length */ if (!x || !*x) { *em = "ERROR!!! no hex string supplied to x2dev()"; return (0); } wx = strncasecmp(x, "0x", 2) ? x : (x + 2); if (((xl = (int)strlen(wx)) < 1) || (xl > XDINDEV)) { (void)snprintf(buf, sizeof(buf) - 1, "ERROR!!! x2dev(\"%s\") bad length: %d", x, xl + 2); buf[sizeof(buf) - 1] = '\0'; *em = MkStrCpy(buf, &c); return (0); } /* * Assemble the device number result from the hex string. */ for (dev = (X2DEV_T)0; *wx; wx++) { if (isdigit((unsigned char)*wx)) { dev = (dev << 4) | (unsigned int)(((int)*wx - (int)'0') & 0xf); continue; } c = (int)tolower((unsigned char)*wx); if ((c >= (int)'a') && (c <= (int)'f')) { dev = (dev << 4) | (unsigned int)((c - 'a' + 10) & 0xf); continue; } (void)snprintf(buf, sizeof(buf) - 1, "ERROR!!! x2dev(\"%s\") non-hex character: %c", x, c); *em = MkStrCpy(buf, &c); } /* * Return result and no error indication. */ *em = (char *)NULL; return (dev); }