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Fix unchecked calls to {m,c,re}alloc so that they print an error and

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exit rather than segfaulting (what an improvement).
This commit is contained in:
Matt Kraai
2000-09-13 02:08:21 +00:00
parent 23ad7f7f06
commit b89075298e
3 changed files with 45 additions and 48 deletions
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31
lash.c
View File

@@ -787,8 +787,7 @@ static void globLastArgument(struct childProgram *prog, int *argcPtr,
*dst = '\0';
} else if (!rc) {
argcAlloced += (prog->globResult.gl_pathc - i);
prog->argv =
realloc(prog->argv, argcAlloced * sizeof(*prog->argv));
prog->argv = xrealloc(prog->argv, argcAlloced * sizeof(*prog->argv));
memcpy(prog->argv + (argc_l - 1), prog->globResult.gl_pathv + i,
sizeof(*(prog->argv)) * (prog->globResult.gl_pathc - i));
argc_l += (prog->globResult.gl_pathc - i - 1);
@@ -837,7 +836,7 @@ static int parseCommand(char **commandPtr, struct job *job, struct jobSet *jobLi
Getting clean memory relieves us of the task of NULL
terminating things and makes the rest of this look a bit
cleaner (though it is, admittedly, a tad less efficient) */
job->cmdBuf = command = calloc(2*strlen(*commandPtr) + 1, sizeof(char));
job->cmdBuf = command = xcalloc(2*strlen(*commandPtr) + 1, sizeof(char));
job->text = NULL;
prog = job->progs;
@@ -876,9 +875,9 @@ static int parseCommand(char **commandPtr, struct job *job, struct jobSet *jobLi
/* +1 here leaves room for the NULL which ends argv */
if ((argc_l + 1) == argvAlloced) {
argvAlloced += 5;
prog->argv = realloc(prog->argv,
sizeof(*prog->argv) *
argvAlloced);
prog->argv = xrealloc(prog->argv,
sizeof(*prog->argv) *
argvAlloced);
}
globLastArgument(prog, &argc_l, &argvAlloced);
prog->argv[argc_l] = buf;
@@ -900,9 +899,9 @@ static int parseCommand(char **commandPtr, struct job *job, struct jobSet *jobLi
case '>': /* redirections */
case '<':
i = prog->numRedirections++;
prog->redirections = realloc(prog->redirections,
sizeof(*prog->redirections) *
(i + 1));
prog->redirections = xrealloc(prog->redirections,
sizeof(*prog->redirections) *
(i + 1));
prog->redirections[i].fd = -1;
if (buf != prog->argv[argc_l]) {
@@ -969,8 +968,8 @@ static int parseCommand(char **commandPtr, struct job *job, struct jobSet *jobLi
/* and start the next */
job->numProgs++;
job->progs = realloc(job->progs,
sizeof(*job->progs) * job->numProgs);
job->progs = xrealloc(job->progs,
sizeof(*job->progs) * job->numProgs);
prog = job->progs + (job->numProgs - 1);
prog->numRedirections = 0;
prog->redirections = NULL;
@@ -1058,7 +1057,7 @@ static int parseCommand(char **commandPtr, struct job *job, struct jobSet *jobLi
while ( (size=fullRead(pipefd[0], charptr1, BUFSIZ-1)) >0) {
int newSize=src - *commandPtr + size + 1 + strlen(charptr2);
if (newSize > BUFSIZ) {
*commandPtr=realloc(*commandPtr, src - *commandPtr +
*commandPtr=xrealloc(*commandPtr, src - *commandPtr +
size + 1 + strlen(charptr2));
}
memcpy(src, charptr1, size);
@@ -1231,10 +1230,10 @@ static int runCommand(struct job *newJob, struct jobSet *jobList, int inBg, int
/* add the theJob to the list of running jobs */
if (!jobList->head) {
theJob = jobList->head = malloc(sizeof(*theJob));
theJob = jobList->head = xmalloc(sizeof(*theJob));
} else {
for (theJob = jobList->head; theJob->next; theJob = theJob->next);
theJob->next = malloc(sizeof(*theJob));
theJob->next = xmalloc(sizeof(*theJob));
theJob = theJob->next;
}
@@ -1277,7 +1276,7 @@ static int busy_loop(FILE * input)
/* save current owner of TTY so we can restore it on exit */
parent_pgrp = tcgetpgrp(0);
command = (char *) calloc(BUFSIZ, sizeof(char));
command = (char *) xcalloc(BUFSIZ, sizeof(char));
/* don't pay any attention to this signal; it just confuses
things and isn't really meant for shells anyway */
@@ -1303,7 +1302,7 @@ static int busy_loop(FILE * input)
}
else {
free(command);
command = (char *) calloc(BUFSIZ, sizeof(char));
command = (char *) xcalloc(BUFSIZ, sizeof(char));
nextCommand = NULL;
}
} else {

31
sh.c
View File

@@ -787,8 +787,7 @@ static void globLastArgument(struct childProgram *prog, int *argcPtr,
*dst = '\0';
} else if (!rc) {
argcAlloced += (prog->globResult.gl_pathc - i);
prog->argv =
realloc(prog->argv, argcAlloced * sizeof(*prog->argv));
prog->argv = xrealloc(prog->argv, argcAlloced * sizeof(*prog->argv));
memcpy(prog->argv + (argc_l - 1), prog->globResult.gl_pathv + i,
sizeof(*(prog->argv)) * (prog->globResult.gl_pathc - i));
argc_l += (prog->globResult.gl_pathc - i - 1);
@@ -837,7 +836,7 @@ static int parseCommand(char **commandPtr, struct job *job, struct jobSet *jobLi
Getting clean memory relieves us of the task of NULL
terminating things and makes the rest of this look a bit
cleaner (though it is, admittedly, a tad less efficient) */
job->cmdBuf = command = calloc(2*strlen(*commandPtr) + 1, sizeof(char));
job->cmdBuf = command = xcalloc(2*strlen(*commandPtr) + 1, sizeof(char));
job->text = NULL;
prog = job->progs;
@@ -876,9 +875,9 @@ static int parseCommand(char **commandPtr, struct job *job, struct jobSet *jobLi
/* +1 here leaves room for the NULL which ends argv */
if ((argc_l + 1) == argvAlloced) {
argvAlloced += 5;
prog->argv = realloc(prog->argv,
sizeof(*prog->argv) *
argvAlloced);
prog->argv = xrealloc(prog->argv,
sizeof(*prog->argv) *
argvAlloced);
}
globLastArgument(prog, &argc_l, &argvAlloced);
prog->argv[argc_l] = buf;
@@ -900,9 +899,9 @@ static int parseCommand(char **commandPtr, struct job *job, struct jobSet *jobLi
case '>': /* redirections */
case '<':
i = prog->numRedirections++;
prog->redirections = realloc(prog->redirections,
sizeof(*prog->redirections) *
(i + 1));
prog->redirections = xrealloc(prog->redirections,
sizeof(*prog->redirections) *
(i + 1));
prog->redirections[i].fd = -1;
if (buf != prog->argv[argc_l]) {
@@ -969,8 +968,8 @@ static int parseCommand(char **commandPtr, struct job *job, struct jobSet *jobLi
/* and start the next */
job->numProgs++;
job->progs = realloc(job->progs,
sizeof(*job->progs) * job->numProgs);
job->progs = xrealloc(job->progs,
sizeof(*job->progs) * job->numProgs);
prog = job->progs + (job->numProgs - 1);
prog->numRedirections = 0;
prog->redirections = NULL;
@@ -1058,7 +1057,7 @@ static int parseCommand(char **commandPtr, struct job *job, struct jobSet *jobLi
while ( (size=fullRead(pipefd[0], charptr1, BUFSIZ-1)) >0) {
int newSize=src - *commandPtr + size + 1 + strlen(charptr2);
if (newSize > BUFSIZ) {
*commandPtr=realloc(*commandPtr, src - *commandPtr +
*commandPtr=xrealloc(*commandPtr, src - *commandPtr +
size + 1 + strlen(charptr2));
}
memcpy(src, charptr1, size);
@@ -1231,10 +1230,10 @@ static int runCommand(struct job *newJob, struct jobSet *jobList, int inBg, int
/* add the theJob to the list of running jobs */
if (!jobList->head) {
theJob = jobList->head = malloc(sizeof(*theJob));
theJob = jobList->head = xmalloc(sizeof(*theJob));
} else {
for (theJob = jobList->head; theJob->next; theJob = theJob->next);
theJob->next = malloc(sizeof(*theJob));
theJob->next = xmalloc(sizeof(*theJob));
theJob = theJob->next;
}
@@ -1277,7 +1276,7 @@ static int busy_loop(FILE * input)
/* save current owner of TTY so we can restore it on exit */
parent_pgrp = tcgetpgrp(0);
command = (char *) calloc(BUFSIZ, sizeof(char));
command = (char *) xcalloc(BUFSIZ, sizeof(char));
/* don't pay any attention to this signal; it just confuses
things and isn't really meant for shells anyway */
@@ -1303,7 +1302,7 @@ static int busy_loop(FILE * input)
}
else {
free(command);
command = (char *) calloc(BUFSIZ, sizeof(char));
command = (char *) xcalloc(BUFSIZ, sizeof(char));
nextCommand = NULL;
}
} else {

31
shell/lash.c
View File

@@ -787,8 +787,7 @@ static void globLastArgument(struct childProgram *prog, int *argcPtr,
*dst = '\0';
} else if (!rc) {
argcAlloced += (prog->globResult.gl_pathc - i);
prog->argv =
realloc(prog->argv, argcAlloced * sizeof(*prog->argv));
prog->argv = xrealloc(prog->argv, argcAlloced * sizeof(*prog->argv));
memcpy(prog->argv + (argc_l - 1), prog->globResult.gl_pathv + i,
sizeof(*(prog->argv)) * (prog->globResult.gl_pathc - i));
argc_l += (prog->globResult.gl_pathc - i - 1);
@@ -837,7 +836,7 @@ static int parseCommand(char **commandPtr, struct job *job, struct jobSet *jobLi
Getting clean memory relieves us of the task of NULL
terminating things and makes the rest of this look a bit
cleaner (though it is, admittedly, a tad less efficient) */
job->cmdBuf = command = calloc(2*strlen(*commandPtr) + 1, sizeof(char));
job->cmdBuf = command = xcalloc(2*strlen(*commandPtr) + 1, sizeof(char));
job->text = NULL;
prog = job->progs;
@@ -876,9 +875,9 @@ static int parseCommand(char **commandPtr, struct job *job, struct jobSet *jobLi
/* +1 here leaves room for the NULL which ends argv */
if ((argc_l + 1) == argvAlloced) {
argvAlloced += 5;
prog->argv = realloc(prog->argv,
sizeof(*prog->argv) *
argvAlloced);
prog->argv = xrealloc(prog->argv,
sizeof(*prog->argv) *
argvAlloced);
}
globLastArgument(prog, &argc_l, &argvAlloced);
prog->argv[argc_l] = buf;
@@ -900,9 +899,9 @@ static int parseCommand(char **commandPtr, struct job *job, struct jobSet *jobLi
case '>': /* redirections */
case '<':
i = prog->numRedirections++;
prog->redirections = realloc(prog->redirections,
sizeof(*prog->redirections) *
(i + 1));
prog->redirections = xrealloc(prog->redirections,
sizeof(*prog->redirections) *
(i + 1));
prog->redirections[i].fd = -1;
if (buf != prog->argv[argc_l]) {
@@ -969,8 +968,8 @@ static int parseCommand(char **commandPtr, struct job *job, struct jobSet *jobLi
/* and start the next */
job->numProgs++;
job->progs = realloc(job->progs,
sizeof(*job->progs) * job->numProgs);
job->progs = xrealloc(job->progs,
sizeof(*job->progs) * job->numProgs);
prog = job->progs + (job->numProgs - 1);
prog->numRedirections = 0;
prog->redirections = NULL;
@@ -1058,7 +1057,7 @@ static int parseCommand(char **commandPtr, struct job *job, struct jobSet *jobLi
while ( (size=fullRead(pipefd[0], charptr1, BUFSIZ-1)) >0) {
int newSize=src - *commandPtr + size + 1 + strlen(charptr2);
if (newSize > BUFSIZ) {
*commandPtr=realloc(*commandPtr, src - *commandPtr +
*commandPtr=xrealloc(*commandPtr, src - *commandPtr +
size + 1 + strlen(charptr2));
}
memcpy(src, charptr1, size);
@@ -1231,10 +1230,10 @@ static int runCommand(struct job *newJob, struct jobSet *jobList, int inBg, int
/* add the theJob to the list of running jobs */
if (!jobList->head) {
theJob = jobList->head = malloc(sizeof(*theJob));
theJob = jobList->head = xmalloc(sizeof(*theJob));
} else {
for (theJob = jobList->head; theJob->next; theJob = theJob->next);
theJob->next = malloc(sizeof(*theJob));
theJob->next = xmalloc(sizeof(*theJob));
theJob = theJob->next;
}
@@ -1277,7 +1276,7 @@ static int busy_loop(FILE * input)
/* save current owner of TTY so we can restore it on exit */
parent_pgrp = tcgetpgrp(0);
command = (char *) calloc(BUFSIZ, sizeof(char));
command = (char *) xcalloc(BUFSIZ, sizeof(char));
/* don't pay any attention to this signal; it just confuses
things and isn't really meant for shells anyway */
@@ -1303,7 +1302,7 @@ static int busy_loop(FILE * input)
}
else {
free(command);
command = (char *) calloc(BUFSIZ, sizeof(char));
command = (char *) xcalloc(BUFSIZ, sizeof(char));
nextCommand = NULL;
}
} else {