diff options
| -rw-r--r-- | sponge.c | 12 | ||||
| -rw-r--r-- | sponge.docbook | 18 |
2 files changed, 27 insertions, 3 deletions
@@ -42,7 +42,8 @@ char *tmpname = NULL; void usage() { - printf("sponge <file>: soak up all input from stdin and write it to <file>\n"); + printf("sponge [-a] <file>: soak up all input from stdin and write it " + "to <file>\n"); exit(0); } @@ -278,6 +279,12 @@ int main (int argc, char **argv) { ssize_t i = 0; size_t mem_available = default_sponge_size(); int tmpfile_used=0; + int append=0; + + if ((argc == 3) && (!strcmp(argv[1], "-a"))) { + append = 1; + argc--, argv++; + } if (argc > 2 || (argc == 2 && strcmp(argv[1], "-h") == 0)) { usage(); @@ -342,6 +349,7 @@ int main (int argc, char **argv) { /* If it's a regular file, or does not yet exist, * attempt a fast rename of the temp file. */ if (((exists && + !append && S_ISREG(statbuf.st_mode) && ! S_ISLNK(statbuf.st_mode) ) || ! exists) && @@ -350,7 +358,7 @@ int main (int argc, char **argv) { } else { /* Fall back to slow copy. */ - outfile = fopen(outname, "w"); + outfile = fopen(outname, append ? "a" : "w"); if (!outfile) { perror("error opening output file"); exit(1); diff --git a/sponge.docbook b/sponge.docbook index 07a2645..a892837 100644 --- a/sponge.docbook +++ b/sponge.docbook @@ -48,7 +48,7 @@ USA <refsynopsisdiv> <cmdsynopsis> - <command>sed '...' file | grep '...' | sponge file</command> + <command>sed '...' file | grep '...' | sponge [-a] file</command> </cmdsynopsis> </refsynopsisdiv> @@ -72,6 +72,22 @@ USA stdout.</para> </refsect1> + + <refsect1> + <title>OPTIONS</title> + + <variablelist> + + <varlistentry> + <term><option>-a</option></term> + <listitem> + <para>Append the output to the specified file + instead possible backup and re-creation.</para> + </listitem> + </varlistentry> + + </variablelist> + </refsect1> <refsect1> <title>AUTHOR</title> |