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author | bapt <bapt@FreeBSD.org> | 2012-10-30 08:00:53 +0000 |
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committer | bapt <bapt@FreeBSD.org> | 2012-10-30 08:00:53 +0000 |
commit | cfea627c58f70cc4126131afee74d6b05a61cc6a (patch) | |
tree | f8fbed3c12f4f1af29e9e5a6673aebe65379a86c /usr.sbin/pw/fileupd.c | |
parent | 730fb9d66a265a556977aeb09ba87ab28e754cba (diff) | |
download | FreeBSD-src-cfea627c58f70cc4126131afee74d6b05a61cc6a.zip FreeBSD-src-cfea627c58f70cc4126131afee74d6b05a61cc6a.tar.gz |
Teach pw(8) about how to use pw/gr API to reduce code duplication
MFC after: 2 months
Diffstat (limited to 'usr.sbin/pw/fileupd.c')
-rw-r--r-- | usr.sbin/pw/fileupd.c | 135 |
1 files changed, 0 insertions, 135 deletions
diff --git a/usr.sbin/pw/fileupd.c b/usr.sbin/pw/fileupd.c index b88f4fa..7df4bb1 100644 --- a/usr.sbin/pw/fileupd.c +++ b/usr.sbin/pw/fileupd.c @@ -66,138 +66,3 @@ extendarray(char ***buf, int * buflen, int needed) } return *buflen; } - - -int -fileupdate(char const * filename, mode_t fmode, char const * newline, char const * prefix, int pfxlen, int updmode) -{ - int rc = 0; - - if (pfxlen <= 1) - rc = EINVAL; - else { - int infd = open(filename, O_RDWR | O_CREAT | O_EXLOCK, fmode); - - if (infd == -1) - rc = errno; - else { - FILE *infp = fdopen(infd, "r+"); - - if (infp == NULL) { - rc = errno; /* Assumes fopen(3) sets errno from open(2) */ - close(infd); - } else { - int outfd; - char file[MAXPATHLEN]; - - strcpy(file, filename); - strcat(file, ".new"); - outfd = open(file, O_RDWR | O_CREAT | O_TRUNC, fmode); - if (outfd == -1) - rc = errno; - else { - FILE *outfp = fdopen(outfd, "w+"); - - if (outfp == NULL) { - rc = errno; - close(outfd); - } else { - int updated = UPD_CREATE; - int linesize = PWBUFSZ; - char *line = malloc(linesize); - - nextline: - while (fgets(line, linesize, infp) != NULL) { - char *p = strchr(line, '\n'); - - while ((p = strchr(line, '\n')) == NULL) { - int l; - if (extendline(&line, &linesize, linesize + PWBUFSZ) == -1) { - int ch; - fputs(line, outfp); - while ((ch = fgetc(infp)) != EOF) { - fputc(ch, outfp); - if (ch == '\n') - break; - } - goto nextline; - } - l = strlen(line); - if (fgets(line + l, linesize - l, infp) == NULL) - break; - } - if (*line != '#' && *line != '\n') { - if (!updated && strncmp(line, prefix, pfxlen) == 0) { - updated = updmode == UPD_REPLACE ? UPD_REPLACE : UPD_DELETE; - - /* - * Only actually write changes if updating - */ - if (updmode == UPD_REPLACE) - strcpy(line, newline); - else if (updmode == UPD_DELETE) - continue; - } - } - fputs(line, outfp); - } - - /* - * Now, we need to decide what to do: If we are in - * update mode, and no record was updated, then error If - * we are in insert mode, and record already exists, - * then error - */ - if (updmode != updated) - /* -1 return means: - * update,delete=no user entry - * create=entry exists - */ - rc = -1; - else { - - /* - * If adding a new record, append it to the end - */ - if (updmode == UPD_CREATE) - fputs(newline, outfp); - - /* - * Flush the file and check for the result - */ - if (fflush(outfp) == EOF) - rc = errno; /* Failed to update */ - else { - /* - * Copy data back into the - * original file and truncate - */ - rewind(infp); - rewind(outfp); - while (fgets(line, linesize, outfp) != NULL) - fputs(line, infp); - - /* - * If there was a problem with copying - * we will just rename 'file.new' - * to 'file'. - * This is a gross hack, but we may have - * corrupted the original file - */ - if (fflush(infp) == EOF || ferror(infp)) - rename(file, filename); - else - ftruncate(infd, ftell(infp)); - } - } - free(line); - fclose(outfp); - } - remove(file); - } - fclose(infp); - } - } - } - return rc; -} |