Actual source code: ftest.c
2: #include <petscsys.h>
3: #if defined(PETSC_HAVE_PWD_H)
4: #include <pwd.h>
5: #endif
6: #include <ctype.h>
7: #include <sys/types.h>
8: #include <sys/stat.h>
9: #if defined(PETSC_HAVE_UNISTD_H)
10: #include <unistd.h>
11: #endif
12: #if defined(PETSC_HAVE_STDLIB_H)
13: #include <stdlib.h>
14: #endif
15: #if defined(PETSC_HAVE_SYS_UTSNAME_H)
16: #include <sys/utsname.h>
17: #endif
18: #if defined(PETSC_HAVE_IO_H)
19: #include <io.h>
20: #endif
21: #if defined(PETSC_HAVE_SYS_SYSTEMINFO_H)
22: #include <sys/systeminfo.h>
23: #endif
25: #if defined (PETSC_HAVE__ACCESS) || defined(PETSC_HAVE_ACCESS)
29: static PetscErrorCode PetscTestOwnership(const char fname[], char mode, uid_t fuid, gid_t fgid, int fmode, PetscBool *flg)
30: {
31: int m = R_OK;
32:
34: if (mode == 'r') m = R_OK;
35: else if (mode == 'w') m = W_OK;
36: else if (mode == 'x') m = X_OK;
37: else SETERRQ(PETSC_COMM_SELF,PETSC_ERR_ARG_WRONG, "Mode must be one of r, w, or x");
38: #if defined(PETSC_HAVE_ACCESS)
39: if(!access(fname, m)) *flg = PETSC_TRUE;
40: #else
41: if (m == X_OK) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_SUP, "Unable to check execute permission for file %s", fname);
42: if(!_access(fname, m)) *flg = PETSC_TRUE;
43: #endif
44: return(0);
45: }
47: #else /* PETSC_HAVE_ACCESS or PETSC_HAVE__ACCESS */
51: static PetscErrorCode PetscTestOwnership(const char fname[], char mode, uid_t fuid, gid_t fgid, int fmode, PetscBool *flg)
52: {
53: uid_t uid;
54: gid_t *gid = PETSC_NULL;
55: int numGroups;
56: int rbit = S_IROTH;
57: int wbit = S_IWOTH;
58: int ebit = S_IXOTH;
62: /* Get the number of supplementary group IDs */
63: #if !defined(PETSC_MISSING_GETGROUPS)
64: numGroups = getgroups(0, gid); if (numGroups < 0) SETERRQ(PETSC_COMM_SELF,numGroups, "Unable to count supplementary group IDs");
65: PetscMalloc((numGroups+1) * sizeof(gid_t), &gid);
66: #else
67: numGroups = 0;
68: #endif
70: /* Get the (effective) user and group of the caller */
71: uid = geteuid();
72: gid[0] = getegid();
74: /* Get supplementary group IDs */
75: #if !defined(PETSC_MISSING_GETGROUPS)
76: getgroups(numGroups, gid+1); if (ierr < 0) SETERRQ(PETSC_COMM_SELF,ierr, "Unable to obtain supplementary group IDs");
77: #endif
79: /* Test for accessibility */
80: if (fuid == uid) {
81: rbit = S_IRUSR;
82: wbit = S_IWUSR;
83: ebit = S_IXUSR;
84: } else {
85: int g;
87: for(g = 0; g <= numGroups; g++) {
88: if (fgid == gid[g]) {
89: rbit = S_IRGRP;
90: wbit = S_IWGRP;
91: ebit = S_IXGRP;
92: break;
93: }
94: }
95: }
96: PetscFree(gid);
98: if (mode == 'r') {
99: if (fmode & rbit) *flg = PETSC_TRUE;
100: } else if (mode == 'w') {
101: if (fmode & wbit) *flg = PETSC_TRUE;
102: } else if (mode == 'x') {
103: if (fmode & ebit) *flg = PETSC_TRUE;
104: }
105: return(0);
106: }
108: #endif /* PETSC_HAVE_ACCESS */
112: static PetscErrorCode PetscGetFileStat(const char fname[], uid_t *fileUid, gid_t *fileGid, int *fileMode,PetscBool *exists)
113: {
114: struct stat statbuf;
118: #if defined(PETSC_HAVE_STAT_NO_CONST)
119: stat((char*) fname, &statbuf);
120: #else
121: stat(fname, &statbuf);
122: #endif
123: if (ierr) {
124: *exists = PETSC_FALSE;
125: } else {
126: *exists = PETSC_TRUE;
127: *fileUid = statbuf.st_uid;
128: *fileGid = statbuf.st_gid;
129: *fileMode = statbuf.st_mode;
130: }
131: return(0);
132: }
136: PetscErrorCode PetscTestFile(const char fname[], char mode, PetscBool *flg)
137: {
138: uid_t fuid;
139: gid_t fgid;
140: int fmode;
142: PetscBool exists;
145: *flg = PETSC_FALSE;
146: if (!fname) return(0);
148: PetscGetFileStat(fname, &fuid, &fgid, &fmode,&exists);
149: if (!exists) return(0);
150: /* Except for systems that have this broken stat macros (rare), this
151: is the correct way to check for a regular file */
152: if (!S_ISREG(fmode)) return(0);
154: PetscTestOwnership(fname, mode, fuid, fgid, fmode, flg);
155: return(0);
156: }
160: PetscErrorCode PetscTestDirectory(const char fname[],char mode,PetscBool *flg)
161: {
162: uid_t fuid;
163: gid_t fgid;
164: int fmode;
166: PetscBool exists;
169: *flg = PETSC_FALSE;
170: if (!fname) return(0);
172: PetscGetFileStat(fname, &fuid, &fgid, &fmode,&exists);
173: if (!exists) return(0);
174: /* Except for systems that have this broken stat macros (rare), this
175: is the correct way to check for a directory */
176: if (!S_ISDIR(fmode)) return(0);
178: PetscTestOwnership(fname, mode, fuid, fgid, fmode, flg);
179: return(0);
180: }
184: PetscErrorCode PetscLs(MPI_Comm comm,const char libname[],char found[],size_t tlen,PetscBool *flg)
185: {
187: size_t len;
188: char *f,program[PETSC_MAX_PATH_LEN];
189: FILE *fp;
192: PetscStrcpy(program,"ls ");
193: PetscStrcat(program,libname);
194: #if defined(PETSC_HAVE_POPEN)
195: PetscPOpen(comm,PETSC_NULL,program,"r",&fp);
196: #else
197: SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SUP_SYS,"Cannot run external programs on this machine");
198: #endif
199: f = fgets(found,tlen,fp);
200: if (f) *flg = PETSC_TRUE; else *flg = PETSC_FALSE;
201: while (f) {
202: PetscStrlen(found,&len);
203: f = fgets(found+len,tlen-len,fp);
204: }
205: if (*flg) {PetscInfo2(0,"ls on %s gives \n%s\n",libname,found);}
206: #if defined(PETSC_HAVE_POPEN)
207: PetscPClose(comm,fp);
208: #else
209: SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SUP_SYS,"Cannot run external programs on this machine");
210: #endif
211: return(0);
212: }