Actual source code: ftest.c

  1: /*$Id: ftest.c,v 1.39 2001/04/04 21:18:39 bsmith Exp $*/

 3:  #include petsc.h
 4:  #include petscsys.h
  5: #if defined(PETSC_HAVE_PWD_H)
  6: #include <pwd.h>
  7: #endif
  8: #include <ctype.h>
  9: #include <sys/types.h>
 10: #if defined(PETSC_HAVE_SYS_STAT_H)
 11: #include <sys/stat.h>
 12: #endif
 13: #if defined(PETSC_HAVE_UNISTD_H)
 14: #include <unistd.h>
 15: #endif
 16: #if defined(PETSC_HAVE_STDLIB_H)
 17: #include <stdlib.h>
 18: #endif
 19: #if !defined(PARCH_win32)
 20: #include <sys/utsname.h>
 21: #endif
 22: #if defined(PARCH_win32)
 23: #include <windows.h>
 24: #include <io.h>
 25: #include <direct.h>
 26: #endif
 27: #if defined (PARCH_win32_gnu)
 28: #include <windows.h>
 29: #endif
 30: #if defined(PETSC_HAVE_SYS_SYSTEMINFO_H)
 31: #include <sys/systeminfo.h>
 32: #endif
 33: #include "petscfix.h"

 35: #if defined (PETSC_HAVE__ACCESS) || defined(PETSC_HAVE_ACCESS)

 39: static int PetscTestOwnership(const char fname[], char mode, uid_t fuid, gid_t fgid, int fmode, PetscTruth *flg) {
 40:   int m;
 41: 
 43:   if (mode == 'r') m = R_OK;
 44:   else if (mode == 'w') m = W_OK;
 45:   else if (mode == 'x') m = X_OK;
 46:   else SETERRQ(PETSC_ERR_ARG_WRONG, "Mode must be one of r, w, or x");
 47: #if defined(PETSC_HAVE_ACCESS)
 48:   if(!access(fname, m))  *flg = PETSC_TRUE;
 49: #else
 50:   if (m == X_OK) SETERRQ1(PETSC_ERR_SUP, "Unable to check execute permission for file %s", fname);
 51:   if(!_access(fname, m)) *flg = PETSC_TRUE;
 52: #endif
 53:   return(0);
 54: }

 56: #else  /* PETSC_HAVE_ACCESS or PETSC_HAVE__ACCESS */

 60: static int PetscTestOwnership(const char fname[], char mode, uid_t fuid, gid_t fgid, int fmode, PetscTruth *flg) {
 61:   uid_t  uid;
 62:   gid_t *gid = PETSC_NULL;
 63:   int    numGroups;
 64:   int    rbit = S_IROTH;
 65:   int    wbit = S_IWOTH;
 66:   int    ebit = S_IXOTH;
 67:   int    ierr;

 70:   /* Get the number of supplementary group IDs */
 71: #if !defined(PETSC_MISSING_GETGROUPS)
 72:   numGroups = getgroups(0, gid); if (numGroups < 0) {SETERRQ(numGroups, "Unable to count supplementary group IDs");}
 73:   PetscMalloc((numGroups+1) * sizeof(gid_t), &gid);
 74: #else
 75:   numGroups = 0;
 76: #endif

 78:   /* Get the (effective) user and group of the caller */
 79:   uid    = geteuid();
 80:   gid[0] = getegid();

 82:   /* Get supplementary group IDs */
 83: #if !defined(PETSC_MISSING_GETGROUPS)
 84:   getgroups(numGroups, gid+1); if (ierr < 0) {SETERRQ(ierr, "Unable to obtain supplementary group IDs");}
 85: #endif

 87:   /* Test for accessibility */
 88:   if (fuid == uid) {
 89:     rbit = S_IRUSR;
 90:     wbit = S_IWUSR;
 91:     ebit = S_IXUSR;
 92:   } else {
 93:     int g;

 95:     for(g = 0; g <= numGroups; g++) {
 96:       if (fgid == gid[g]) {
 97:         rbit = S_IRGRP;
 98:         wbit = S_IWGRP;
 99:         ebit = S_IXGRP;
100:         break;
101:       }
102:     }
103:   }
104:   PetscFree(gid);

106:   if (mode == 'r') {
107:     if (fmode & rbit) *flg = PETSC_TRUE;
108:   } else if (mode == 'w') {
109:     if (fmode & wbit) *flg = PETSC_TRUE;
110:   } else if (mode == 'x') {
111:     if (fmode & ebit) *flg = PETSC_TRUE;
112:   }
113:   return(0);
114: }

116: #endif /* PETSC_HAVE_ACCESS */

120: static int PetscGetFileStat(const char fname[], uid_t *fileUid, gid_t *fileGid, int *fileMode,PetscTruth *exists) {
121:   struct stat statbuf;
122:   int         ierr;

125: #if defined(PETSC_HAVE_STAT_NO_CONST)
126:   stat((char*) fname, &statbuf);
127: #else
128:   stat(fname, &statbuf);
129: #endif
130:   if (ierr) {
131:     *exists = PETSC_FALSE;
132:   } else {
133:     *exists = PETSC_TRUE;
134:     *fileUid  = statbuf.st_uid;
135:     *fileGid  = statbuf.st_gid;
136:     *fileMode = statbuf.st_mode;
137:   }
138:   return(0);
139: }

143: int PetscTestFile(const char fname[], char mode, PetscTruth *flg)
144: {
145:   uid_t      fuid;
146:   gid_t      fgid;
147:   int        fmode;
148:   int        ierr;
149:   PetscTruth exists;

152:   *flg = PETSC_FALSE;
153:   if (!fname) return(0);

155:   PetscGetFileStat(fname, &fuid, &fgid, &fmode,&exists);
156:   if (!exists) return(0);
157:   /* Except for systems that have this broken stat macros (rare), this
158:      is the correct way to check for a regular file */
159:   if (!S_ISREG(fmode)) return(0);

161:   PetscTestOwnership(fname, mode, fuid, fgid, fmode, flg);
162:   return(0);
163: }

167: int PetscTestDirectory(const char fname[],char mode,PetscTruth *flg)
168: {
169:   uid_t      fuid;
170:   gid_t      fgid;
171:   int        fmode;
172:   int        ierr;
173:   PetscTruth exists;

176:   *flg = PETSC_FALSE;
177:   if (!fname) return(0);

179:   PetscGetFileStat(fname, &fuid, &fgid, &fmode,&exists);
180:   if (!exists) return(0);
181:   /* Except for systems that have this broken stat macros (rare), this
182:      is the correct way to check for a directory */
183:   if (!S_ISDIR(fmode)) return(0);

185:   PetscTestOwnership(fname, mode, fuid, fgid, fmode, flg);
186:   return(0);
187: }

191: int PetscLs(MPI_Comm comm,const char libname[],char *found,int tlen,PetscTruth *flg)
192: {
193:   int   ierr,len;
194:   char  *f,program[PETSC_MAX_PATH_LEN];
195:   FILE  *fp;

198:   PetscStrcpy(program,"ls ");
199:   PetscStrcat(program,libname);
200:   PetscPOpen(comm,PETSC_NULL,program,"r",&fp);
201:   f      = fgets(found,tlen,fp);
202:   if (f) *flg = PETSC_TRUE; else *flg = PETSC_FALSE;
203:   while (f) {
204:     PetscStrlen(found,&len);
205:     f     = fgets(found+len,tlen-len,fp);
206:   }
207:   if (*flg) PetscLogInfo(0,"ls on %s gives \n%s\n",libname,found);
208:   return(0);
209: }