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use portabale file io

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This commit is contained in:
Duncan Laurie 2004-09-01 16:41:00 +00:00
parent c1fd61b419
commit eab79363a2
1 changed files with 18 additions and 16 deletions
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34
ipmitool/lib/helper.c
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@ -155,52 +155,54 @@ unsigned char ipmi_csum(unsigned char * d, int s)
* file: filename * file: filename
* rw: read-write flag, 1=write * rw: read-write flag, 1=write
*/ */
int ipmi_open_file(const char * file, int rw) FILE * ipmi_open_file(const char * file, int rw)
{ {
struct stat st1, st2; struct stat st1, st2;
int fp; FILE * fp;
/* verify existance */ /* verify existance */
if (lstat(file, &st1) < 0) { if (lstat(file, &st1) < 0) {
if (rw) { if (rw) {
/* does not exist, ok to create */ /* does not exist, ok to create */
fp = open(file, O_WRONLY|O_TRUNC|O_EXCL|O_CREAT, 0600); fp = fopen(file, "w");
if (fp < 0) { if (!fp) {
printf("ERROR: Unable to open file %s for write: %s\n", printf("ERROR: Unable to open file %s for write: %s\n",
file, strerror(errno)); file, strerror(errno));
return -1; return NULL;
} }
return fp; return fp;
} else { } else {
printf("ERROR: File %s does not exist\n", file); printf("ERROR: File %s does not exist\n", file);
return -1; return NULL;
} }
} }
/* it exists - only regular files, not links */ /* it exists - only regular files, not links */
if (!S_ISREG(st1.st_mode)) { if (!S_ISREG(st1.st_mode)) {
printf("ERROR: File %s has invalid mode: %d\n", file, st1.st_mode); printf("ERROR: File %s has invalid mode: %d\n", file, st1.st_mode);
return -1; return NULL;
} }
/* allow only files with 1 link (itself) */ /* allow only files with 1 link (itself) */
if (st1.st_nlink != 1) { if (st1.st_nlink != 1) {
printf("ERROR: File %s has invalid link count: %d != 1\n", printf("ERROR: File %s has invalid link count: %d != 1\n",
file, (int)st1.st_nlink); file, (int)st1.st_nlink);
return -1; return NULL;
} }
fp = open(file, rw ? (O_WRONLY|O_TRUNC) : O_RDONLY, 0600); fp = fopen(file, rw ? "w+" : "r");
if (fp < 0) { if (!fp) {
printf("ERROR: Unable to open file %s: %s\n", printf("ERROR: Unable to open file %s: %s\n",
file, strerror(errno)); file, strerror(errno));
return -1; return NULL;
} }
/* stat again */ /* stat again */
if (fstat(fp, &st2) < 0) { if (fstat(fileno(fp), &st2) < 0) {
close(fp); printf("ERROR: Unable to stat file %s: %s\n",
return -1; file, strerror(errno));
fclose(fp);
return NULL;
} }
/* verify inode, owner, link count */ /* verify inode, owner, link count */
@ -208,8 +210,8 @@ int ipmi_open_file(const char * file, int rw)
st2.st_uid != st1.st_uid || st2.st_uid != st1.st_uid ||
st2.st_nlink != 1) { st2.st_nlink != 1) {
printf("ERROR: Unable to verify file %s\n", file); printf("ERROR: Unable to verify file %s\n", file);
close(fp); fclose(fp);
return -1; return NULL;
} }
return fp; return fp;