Changeset 946058b
- Timestamp:
- Oct 15, 2009, 8:00:07 PM (15 years ago)
- Branches:
- master, release-1.10, release-1.5, release-1.6, release-1.7, release-1.8, release-1.9
- Children:
- 050d25e
- Parents:
- 6ace255
- git-author:
- Karl Ramm <kcr@1ts.org> (09/25/09 10:50:17)
- git-committer:
- Karl Ramm <kcr@1ts.org> (10/15/09 20:00:07)
- File:
-
- 1 edited
Legend:
- Unmodified
- Added
- Removed
-
util.c
r6ace255 r946058b 552 552 } 553 553 554 /* Delete the line matching "line" from the named file. If no such 555 * line is found the file is left intact. If backup==1 then create a 556 * backupfile containing the original contents. This is an 557 * inefficient impelementation which reads the entire file into 558 * memory. 554 /* Delete all lines matching "line" from the named file. If no such 555 * line is found the file is left intact. If backup==1 then leave a 556 * backup file containing the original contents. The match is 557 * case-insensitive. 559 558 * 560 559 * Returns the number of lines removed … … 562 561 int owl_util_file_deleteline(const char *filename, const char *line, int backup) 563 562 { 564 char buff[LINE], *text; 565 char *backupfilename=NULL; 566 FILE *file, *backupfile=NULL; 567 int size, newline; 563 char *backupfile, *newfile, *buf = NULL; 564 FILE *old, *new; 565 struct stat st; 568 566 int numremoved = 0; 569 567 570 /* open the file for reading */ 571 file=fopen(filename, "r"); 572 if (!file) { 573 owl_function_error("Error opening file %s", filename); 568 if ((old = fopen(filename, "r")) == NULL) { 569 owl_function_error("Cannot open %s (for reading): %s", 570 filename, strerror(errno)); 574 571 return 0; 575 572 } 576 573 577 /* open the backup file for writing */ 574 if (fstat(fileno(old), &st) != 0) { 575 owl_function_error("Cannot stat %s: %s", filename, strerror(errno)); 576 return 0; 577 } 578 579 newfile = owl_sprintf("%s.new", filename); 580 if ((new = fopen(newfile, "w")) == NULL) { 581 owl_function_error("Cannot open %s (for writing): %s", 582 filename, strerror(errno)); 583 free(newfile); 584 fclose(old); 585 return 0; 586 } 587 588 if (fchmod(fileno(new), st.st_mode & 0777) != 0) { 589 owl_function_error("Cannot set permissions on %s: %s", 590 filename, strerror(errno)); 591 unlink(newfile); 592 fclose(new); 593 free(newfile); 594 fclose(old); 595 return 0; 596 } 597 598 while (owl_getline_chomp(&buf, old)) 599 if (strcasecmp(buf, line) != 0) 600 fprintf(new, "%s\n", buf); 601 else 602 numremoved++; 603 604 fclose(new); 605 fclose(old); 606 578 607 if (backup) { 579 backupfilename=owl_sprintf("%s.backup", filename); 580 backupfile=fopen(backupfilename, "w"); 581 if (!backupfile) { 582 owl_function_error("Error opening file %s for writing", backupfilename); 583 owl_free(backupfilename); 584 fclose(file); 608 backupfile = owl_sprintf("%s.backup", filename); 609 unlink(backupfile); 610 if (link(filename, backupfile) != 0) { 611 owl_function_error("Cannot link %s: %s", backupfile, strerror(errno)); 612 owl_free(backupfile); 613 unlink(newfile); 614 owl_free(newfile); 585 615 return 0; 586 616 } 587 } 588 589 /* we'll read the entire file into memory, minus the line we don't want and 590 * and at the same time create the backup file if necessary 591 */ 592 text=owl_malloc(LINE); 593 strcpy(text, ""); 594 size=LINE; 595 while (fgets(buff, LINE, file)!=NULL) { 596 /* strip the newline */ 597 newline=0; 598 if (buff[0] != '\0' && buff[strlen(buff) - 1] == '\n') { 599 buff[strlen(buff)-1]='\0'; 600 newline=1; 601 } 602 603 /* if we don't match the line, add to saved text in memory */ 604 if (strcasecmp(buff, line)) { 605 size+=LINE; 606 text=owl_realloc(text, size); 607 strcat(text, buff); 608 if (newline) strcat(text, "\n"); 609 } else { 610 numremoved++; 611 } 612 613 /* write to backupfile if necessary */ 614 if (backup) { 615 fputs(buff, backupfile); 616 if (newline) fputs("\n", backupfile); 617 } 618 } 619 if (backup) fclose(backupfile); 620 fclose(file); 621 622 /* now rewrite the original file from memory */ 623 file=fopen(filename, "w"); 624 if (!file) { 625 owl_function_error("WARNING: Error opening %s for writing. Use %s to restore.", filename, backupfilename); 626 owl_function_beep(); 627 } else { 628 fputs(text, file); 629 fclose(file); 630 } 631 632 if (backup) 633 owl_free(backupfilename); 634 owl_free(text); 617 owl_free(backupfile); 618 } 619 620 if (rename(newfile, filename) != 0) { 621 owl_function_error("Cannot move %s to %s: %s", 622 newfile, filename, strerror(errno)); 623 numremoved = 0; 624 } 625 626 unlink(newfile); 627 owl_free(newfile); 635 628 636 629 return numremoved;
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