diff options
Diffstat (limited to 'editors/sed.c')
| -rw-r--r-- | editors/sed.c | 74 |
1 files changed, 46 insertions, 28 deletions
diff --git a/editors/sed.c b/editors/sed.c index ae8d983..db364e3 100644 --- a/editors/sed.c +++ b/editors/sed.c @@ -34,7 +34,10 @@ resulting sed_cmd_t structures are appended to a linked list (sed_cmd_head/sed_cmd_tail). - process_file() does actual sedding, reading data lines from an input FILE * + add_input_file() adds a FILE * to the list of input files. We need to + know them all ahead of time to find the last line for the $ match. + + process_files() does actual sedding, reading data lines from each input FILE * (which could be stdin) and applying the sed command list (sed_cmd_head) to each of the resulting lines. @@ -116,6 +119,9 @@ static int be_quiet, in_place, regex_type; FILE *nonstdout; char *outname,*hold_space; +/* List of input files */ +int input_file_count,current_input_file; +FILE **input_file_list; static const char bad_format_in_subst[] = "bad format in substitution expression"; @@ -171,6 +177,9 @@ static void free_and_close_stuff(void) } if(hold_space) free(hold_space); + + while(current_input_file<input_file_count) + fclose(input_file_list[current_input_file++]); } #endif @@ -565,6 +574,8 @@ void add_cmd(char *cmdstr) } } +/* Append to a string, reallocating memory as necessary. */ + struct pipeline { char *buf; /* Space to hold string */ int idx; /* Space used */ @@ -718,20 +729,29 @@ static void flush_append(void) append_head=append_tail=NULL; } -/* Get next line of input, flushing append buffer and noting if we hit EOF - * without a newline on the last line. +void add_input_file(FILE *file) +{ + input_file_list=xrealloc(input_file_list,(input_file_count+1)*sizeof(FILE *)); + input_file_list[input_file_count++]=file; +} + +/* Get next line of input from input_file_list, flushing append buffer and + * noting if we ran out of files without a newline on the last line we read. */ -static char *get_next_line(FILE * file, int *no_newline) +static char *get_next_line(int *no_newline) { - char *temp; + char *temp=NULL; int len; flush_append(); - temp=bb_get_line_from_file(file); - if(temp) { - len=strlen(temp); - if(len && temp[len-1]=='\n') temp[len-1]=0; - else *no_newline=1; + while(current_input_file<input_file_count) { + temp=bb_get_line_from_file(input_file_list[current_input_file]); + if(temp) { + len=strlen(temp); + *no_newline=!(len && temp[len-1]=='\n'); + if(!*no_newline) temp[len-1]=0; + break; + } else fclose(input_file_list[current_input_file++]); } return temp; @@ -757,15 +777,15 @@ static int puts_maybe_newline(char *s, FILE *file, int missing_newline, int no_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_files(void) { char *pattern_space, *next_line; - static int linenum = 0, missing_newline=0; + int linenum = 0, missing_newline=0; int no_newline,next_no_newline=0; - next_line = get_next_line(file,&next_no_newline); + next_line = get_next_line(&next_no_newline); - /* go through every line in the file */ + /* go through every line in each file */ for(;;) { sed_cmd_t *sed_cmd; int substituted=0; @@ -775,7 +795,7 @@ static void process_file(FILE *file) no_newline=next_no_newline; /* Read one line in advance so we can act on the last line, the '$' address */ - next_line = get_next_line(file,&next_no_newline); + next_line = get_next_line(&next_no_newline); linenum++; restart: /* for every line, go through all the commands */ @@ -944,7 +964,7 @@ restart: free(pattern_space); pattern_space = next_line; no_newline=next_no_newline; - next_line = get_next_line(file,&next_no_newline); + next_line = get_next_line(&next_no_newline); linenum++; break; } @@ -974,7 +994,7 @@ restart: pattern_space[len]='\n'; strcpy(pattern_space+len+1, next_line); no_newline=next_no_newline; - next_line = get_next_line(file,&next_no_newline); + next_line = get_next_line(&next_no_newline); linenum++; } break; @@ -1150,8 +1170,7 @@ extern int sed_main(int argc, char **argv) } } - /* if we didn't get a pattern from a -e and no command file was specified, - * argv[optind] should be the pattern. no pattern, no worky */ + /* if we didn't get a pattern from -e or -f, use argv[optind] */ if(getpat) { if (argv[optind] == NULL) bb_show_usage(); @@ -1172,14 +1191,16 @@ extern int sed_main(int argc, char **argv) fprintf(stderr,"sed: Filename required for -i\n"); exit(1); } - process_file(stdin); + add_input_file(stdin); + process_files(); } else { int i; FILE *file; for (i = optind; i < argc; i++) { if(!strcmp(argv[i], "-") && !in_place) { - process_file(stdin); + add_input_file(stdin); + process_files(); } else { file = bb_wfopen(argv[i], "r"); if (file) { @@ -1187,30 +1208,27 @@ extern int sed_main(int argc, char **argv) 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(nonstdout),statbuf.st_mode); atexit(cleanup_outname); - } - process_file(file); - fclose(file); - if(in_place) { + add_input_file(file); + process_files(); fclose(nonstdout); nonstdout=stdout; unlink(argv[i]); rename(outname,argv[i]); free(outname); outname=0; - } + } else add_input_file(file); } else { status = EXIT_FAILURE; } } } + if(input_file_count>current_input_file) process_files(); } return status; |