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Use getline() instead of fgets(). This enables nl(1) to handle

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arbitrarily long lines and embedded NULs. The new functionality is
nugatory, but adding it is a simple way to improve the exposure of
getline() in -CURRENT.
This commit is contained in:
David Schultz 2009-02-28 15:53:36 +00:00
parent 4b2d6aaf4b
commit 8e31b96c07
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=189168
1 changed files with 22 additions and 27 deletions
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49
usr.bin/nl/nl.c
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@ -42,6 +42,7 @@ __COPYRIGHT(
__RCSID("$FreeBSD$");
#endif
#define _WITH_GETLINE
#include <sys/types.h>
#include <err.h>
@ -97,12 +98,6 @@ static void filter(void);
static void parse_numbering(const char *, int);
static void usage(void);
/*
* Pointer to dynamically allocated input line buffer, and its size.
*/
static char *buffer;
static size_t buffersize;
/*
* Dynamically allocated buffer suitable for string representation of ints.
*/
@ -269,14 +264,6 @@ main(argc, argv)
memcpy(delim + delim1len, delim2, delim2len);
delimlen = delim1len + delim2len;
/* Determine the maximum input line length to operate on. */
if ((val = sysconf(_SC_LINE_MAX)) == -1) /* ignore errno */
val = LINE_MAX;
/* Allocate sufficient buffer space (including the terminating NUL). */
buffersize = (size_t)val + 1;
if ((buffer = malloc(buffersize)) == NULL)
err(EXIT_FAILURE, "cannot allocate input line buffer");
/* Allocate a buffer suitable for preformatting line number. */
intbuffersize = max(INT_STRLEN_MAXIMUM, width) + 1; /* NUL */
if ((intbuffer = malloc(intbuffersize)) == NULL)
@ -292,6 +279,9 @@ main(argc, argv)
static void
filter()
{
char *buffer;
size_t buffersize;
ssize_t linelen;
int line; /* logical line number */
int section; /* logical page section */
unsigned int adjblank; /* adjacent blank lines */
@ -302,21 +292,23 @@ filter()
line = startnum;
section = BODY;
while (fgets(buffer, (int)buffersize, stdin) != NULL) {
buffer = NULL;
buffersize = 0;
while ((linelen = getline(&buffer, &buffersize, stdin)) > 0) {
for (idx = FOOTER; idx <= NP_LAST; idx++) {
/* Does it look like a delimiter? */
if (memcmp(buffer + delimlen * idx, delim,
delimlen) == 0) {
/* Was this the whole line? */
if (buffer[delimlen * (idx + 1)] == '\n') {
section = idx;
adjblank = 0;
if (restart)
line = startnum;
goto nextline;
}
} else {
if (delimlen * (idx + 1) > linelen)
break;
if (memcmp(buffer + delimlen * idx, delim,
delimlen) != 0)
break;
/* Was this the whole line? */
if (buffer[delimlen * (idx + 1)] == '\n') {
section = idx;
adjblank = 0;
if (restart)
line = startnum;
goto nextline;
}
}
@ -354,7 +346,8 @@ filter()
} else {
(void)printf("%*s", width, "");
}
(void)printf("%s%s", sep, buffer);
(void)fputs(sep, stdout);
(void)fwrite(buffer, linelen, 1, stdout);
if (ferror(stdout))
err(EXIT_FAILURE, "output error");
@ -364,6 +357,8 @@ nextline:
if (ferror(stdin))
err(EXIT_FAILURE, "input error");
free(buffer);
}
/*