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Add -i option to sed, to edit files in-place.

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This commit is contained in:
Rob Landley 2004-02-18 09:54:15 +00:00
parent be8a6ae6eb
commit 53302f80da
1 changed files with 54 additions and 7 deletions
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61
editors/sed.c
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@ -111,7 +111,10 @@ typedef struct sed_cmd_s {
/* globals */
/* options */
static int be_quiet = 0;
static int be_quiet = 0, in_place=0;
FILE *nonstdout;
char *outname;
static const char bad_format_in_subst[] =
"bad format in substitution expression";
@ -168,6 +171,13 @@ static void free_and_close_stuff(void)
}
#endif
/* If something bad happens during -i operation, delete temp file */
static void cleanup_outname(void)
{
if(outname) unlink(outname);
}
/* strdup, replacing "\n" with '\n', and "\delimiter" with 'delimiter' */
static void parse_escapes(char *dest, const char *string, int len, char from, char to)
@ -690,7 +700,7 @@ static void flush_append(void)
{
/* Output appended lines. */
while(append_head) {
puts(append_head->string);
fprintf(nonstdout,"%s\n",append_head->string);
append_tail=append_head->next;
free(append_head->string);
free(append_head);
@ -728,12 +738,17 @@ static int puts_maybe_newline(char *s, FILE *file, int missing_newline, int no_n
fputs(s,file);
if(!no_newline) fputc('\n',file);
if(ferror(file)) {
fprintf(stderr,"Write failed.\n");
exit(4); /* It's what gnu sed exits with... */
}
return no_newline;
}
#define sed_puts(s,n) missing_newline=puts_maybe_newline(s,stdout,missing_newline,n)
#define sed_puts(s,n) missing_newline=puts_maybe_newline(s,nonstdout,missing_newline,n)
static void process_file(FILE * file)
static void process_file(FILE *file)
{
char *pattern_space, *next_line, *hold_space=NULL;
static int linenum = 0, missing_newline=0;
@ -819,7 +834,7 @@ restart:
/* Print line number */
case '=':
printf("%d\n", linenum);
fprintf(nonstdout,"%d\n", linenum);
break;
/* Write the current pattern space up to the first newline */
@ -1091,8 +1106,12 @@ extern int sed_main(int argc, char **argv)
#endif
/* do normal option parsing */
while ((opt = getopt(argc, argv, "ne:f:")) > 0) {
while ((opt = getopt(argc, argv, "ine:f:")) > 0) {
switch (opt) {
case 'i':
in_place++;
atexit(cleanup_outname);
break;
case 'n':
be_quiet++;
break;
@ -1131,23 +1150,51 @@ extern int sed_main(int argc, char **argv)
/* Flush any unfinished commands. */
add_cmd("");
/* By default, we write to stdout */
nonstdout=stdout;
/* argv[(optind)..(argc-1)] should be names of file to process. If no
* files were specified or '-' was specified, take input from stdin.
* Otherwise, we process all the files specified. */
if (argv[optind] == NULL) {
if(in_place) {
fprintf(stderr,"sed: Filename required for -i\n");
exit(1);
}
process_file(stdin);
} else {
int i;
FILE *file;
for (i = optind; i < argc; i++) {
if(!strcmp(argv[i], "-")) {
if(!strcmp(argv[i], "-") && !in_place) {
process_file(stdin);
} else {
file = bb_wfopen(argv[i], "r");
if (file) {
if(in_place) {
struct stat statbuf;
outname=bb_xstrndup(argv[i],strlen(argv[i])+6);
strcat(outname,"XXXXXX");
/* Set permissions of output file */
fstat(fileno(file),&statbuf);
mkstemp(outname);
nonstdout=bb_wfopen(outname,"w");
/* Set permissions of output file */
fstat(fileno(file),&statbuf);
fchmod(fileno(file),statbuf.st_mode);
atexit(cleanup_outname);
}
process_file(file);
fclose(file);
if(in_place) {
fclose(nonstdout);
nonstdout=stdout;
unlink(argv[i]);
rename(outname,argv[i]);
free(outname);
outname=0;
}
} else {
status = EXIT_FAILURE;
}